Warning: Permanently added '54.204.74.2' (ED25519) to the list of known hosts.
Running (timeout=18000): unbuffer mock --spec /var/lib/copr-rpmbuild/workspace/workdir-irgmzx7p/xtensor-python/xtensor-python.spec --sources /var/lib/copr-rpmbuild/workspace/workdir-irgmzx7p/xtensor-python --resultdir /var/lib/copr-rpmbuild/results --uniqueext 1770904388.326455 -r /var/lib/copr-rpmbuild/results/configs/child.cfg
INFO: mock.py version 6.6 starting (python version = 3.14.2, NVR = mock-6.6-1.fc43), args: /usr/libexec/mock/mock --spec /var/lib/copr-rpmbuild/workspace/workdir-irgmzx7p/xtensor-python/xtensor-python.spec --sources /var/lib/copr-rpmbuild/workspace/workdir-irgmzx7p/xtensor-python --resultdir /var/lib/copr-rpmbuild/results --uniqueext 1770904388.326455 -r /var/lib/copr-rpmbuild/results/configs/child.cfg
Start(bootstrap): init plugins
INFO: tmpfs initialized
INFO: selinux enabled
INFO: chroot_scan: initialized
INFO: compress_logs: initialized
Finish(bootstrap): init plugins
Start: init plugins
INFO: tmpfs initialized
INFO: selinux enabled
INFO: chroot_scan: initialized
INFO: compress_logs: initialized
Finish: init plugins
INFO: Signal handler active
Start: run
INFO: Start(/var/lib/copr-rpmbuild/workspace/workdir-irgmzx7p/xtensor-python/xtensor-python.spec)  Config(fedora-rawhide-x86_64)
Start: clean chroot
Finish: clean chroot
Mock Version: 6.6
INFO: Mock Version: 6.6
Start(bootstrap): chroot init
INFO: mounting tmpfs at /var/lib/mock/fedora-rawhide-x86_64-bootstrap-1770904388.326455/root.
INFO: calling preinit hooks
INFO: enabled root cache
INFO: enabled package manager cache
Start(bootstrap): cleaning package manager metadata
Finish(bootstrap): cleaning package manager metadata
INFO: Guessed host environment type: unknown
INFO: Using container image: registry.fedoraproject.org/fedora:rawhide
INFO: Pulling image: registry.fedoraproject.org/fedora:rawhide
INFO: Tagging container image as mock-bootstrap-a57c0582-23e7-4158-af20-da4cd6da1de8
INFO: Checking that 0a0c439658dd7b75bf8f5a843f3a9ca0dca6343bdd3fd1676ba95b9bec4a9634 image matches host's architecture
INFO: Copy content of container 0a0c439658dd7b75bf8f5a843f3a9ca0dca6343bdd3fd1676ba95b9bec4a9634 to /var/lib/mock/fedora-rawhide-x86_64-bootstrap-1770904388.326455/root
INFO: mounting 0a0c439658dd7b75bf8f5a843f3a9ca0dca6343bdd3fd1676ba95b9bec4a9634 with podman image mount
INFO: image 0a0c439658dd7b75bf8f5a843f3a9ca0dca6343bdd3fd1676ba95b9bec4a9634 as /var/lib/containers/storage/overlay/ede174b9c190f9a3ee296a0c6e28ac5a6a3fffc4b918cdd69606e7fc6d1392f1/merged
INFO: umounting image 0a0c439658dd7b75bf8f5a843f3a9ca0dca6343bdd3fd1676ba95b9bec4a9634 (/var/lib/containers/storage/overlay/ede174b9c190f9a3ee296a0c6e28ac5a6a3fffc4b918cdd69606e7fc6d1392f1/merged) with podman image umount
INFO: Removing image mock-bootstrap-a57c0582-23e7-4158-af20-da4cd6da1de8
INFO: Package manager dnf5 detected and used (fallback)
INFO: Not updating bootstrap chroot, bootstrap_image_ready=True
Start(bootstrap): creating root cache
Finish(bootstrap): creating root cache
Finish(bootstrap): chroot init
Start: chroot init
INFO: mounting tmpfs at /var/lib/mock/fedora-rawhide-x86_64-1770904388.326455/root.
INFO: calling preinit hooks
INFO: enabled root cache
INFO: enabled package manager cache
Start: cleaning package manager metadata
Finish: cleaning package manager metadata
INFO: enabled HW Info plugin
INFO: Package manager dnf5 detected and used (direct choice)
INFO: Buildroot is handled by package management downloaded with a bootstrap image:
  rpm-6.0.1-3.fc45.x86_64
  rpm-sequoia-1.10.0-2.fc44.x86_64
  dnf5-5.3.0.0-7.fc44.x86_64
  dnf5-plugins-5.3.0.0-7.fc44.x86_64
Start: installing minimal buildroot with dnf5
Updating and loading repositories:
 Copr repository                        100% |   8.3 KiB/s |   1.5 KiB |  00m00s
 fedora                                 100% |  97.3 KiB/s |  25.9 KiB |  00m00s
Repositories loaded.
Package                            Arch   Version                      Repository      Size
Installing group/module packages:
 bash                              x86_64 0:5.3.9-3.fc44               fedora       8.5 MiB
 bzip2                             x86_64 0:1.0.8-23.fc44              fedora      95.0 KiB
 coreutils                         x86_64 0:9.10-1.fc45                fedora       5.6 MiB
 cpio                              x86_64 0:2.15-9.fc44                fedora       1.1 MiB
 diffutils                         x86_64 0:3.12-5.fc44                fedora       1.6 MiB
 fedora-release-common             noarch 0:45-0.1                     fedora      20.5 KiB
 findutils                         x86_64 1:4.10.0-7.fc44              fedora       1.9 MiB
 gawk                              x86_64 0:5.3.2-3.fc44               fedora       1.8 MiB
 glibc-minimal-langpack            x86_64 0:2.43.9000-1.fc45           fedora       0.0   B
 grep                              x86_64 0:3.12-3.fc44                fedora       1.0 MiB
 gzip                              x86_64 0:1.14-2.fc44                fedora     401.6 KiB
 info                              x86_64 0:7.2-7.fc44                 fedora     357.9 KiB
 patch                             x86_64 0:2.8-4.fc44                 fedora     226.6 KiB
 redhat-rpm-config                 noarch 0:343-19.fc44                fedora     183.6 KiB
 rpm-build                         x86_64 0:6.0.1-3.fc45               fedora     294.6 KiB
 sed                               x86_64 0:4.9-8.fc45                 fedora     857.2 KiB
 shadow-utils                      x86_64 2:4.19.0-6.fc44              fedora       4.0 MiB
 tar                               x86_64 2:1.35-8.fc44                fedora       3.0 MiB
 unzip                             x86_64 0:6.0-69.fc44                fedora     445.8 KiB
 util-linux                        x86_64 0:2.41.3-12.fc44             fedora       3.5 MiB
 which                             x86_64 0:2.23-4.fc44                fedora      83.4 KiB
 xz                                x86_64 1:5.8.2-2.fc44               fedora       1.3 MiB
Installing dependencies:
 R-srpm-macros                     noarch 0:1.3.4-3.fc44               fedora       3.4 KiB
 add-determinism                   x86_64 0:0.7.2-4.fc45               fedora       2.2 MiB
 alternatives                      x86_64 0:1.33-5.fc44                fedora      62.1 KiB
 ansible-srpm-macros               noarch 0:1-20.1.fc44                fedora      35.7 KiB
 audit-libs                        x86_64 0:4.1.3-1.fc44               fedora     390.5 KiB
 binutils                          x86_64 0:2.46-1.fc45                fedora      27.2 MiB
 build-reproducibility-srpm-macros noarch 0:0.7.2-4.fc45               fedora       1.2 KiB
 bzip2-libs                        x86_64 0:1.0.8-23.fc44              fedora      80.5 KiB
 ca-certificates                   noarch 0:2025.2.80_v9.0.304-5.fc44  fedora       2.7 MiB
 cmake-srpm-macros                 noarch 0:4.2.3-1.fc45               fedora     524.0   B
 coreutils-common                  x86_64 0:9.10-1.fc45                fedora      10.7 MiB
 crypto-policies                   noarch 0:20251128-3.git19878fe.fc44 fedora     132.6 KiB
 curl                              x86_64 0:8.18.0-4.fc45              fedora     480.0 KiB
 cyrus-sasl-lib                    x86_64 0:2.1.28-35.fc44             fedora       2.3 MiB
 debugedit                         x86_64 0:5.2-6.fc44                 fedora     218.3 KiB
 dwz                               x86_64 0:0.16-3.fc44                fedora     290.9 KiB
 ed                                x86_64 0:1.22.4-2.fc44              fedora     149.1 KiB
 efi-srpm-macros                   noarch 0:6-6.fc44                   fedora      40.2 KiB
 elfutils                          x86_64 0:0.194-3.fc44               fedora       2.9 MiB
 elfutils-debuginfod-client        x86_64 0:0.194-3.fc44               fedora      83.7 KiB
 elfutils-default-yama-scope       noarch 0:0.194-3.fc44               fedora       1.8 KiB
 elfutils-libelf                   x86_64 0:0.194-3.fc44               fedora       1.1 MiB
 elfutils-libs                     x86_64 0:0.194-3.fc44               fedora     715.3 KiB
 fedora-gpg-keys                   noarch 0:45-0.1                     fedora     133.4 KiB
 fedora-release                    noarch 0:45-0.1                     fedora       0.0   B
 fedora-release-identity-basic     noarch 0:45-0.1                     fedora     664.0   B
 fedora-repos                      noarch 0:45-0.1                     fedora       4.9 KiB
 fedora-repos-rawhide              noarch 0:45-0.1                     fedora       2.2 KiB
 file                              x86_64 0:5.46-9.fc44                fedora     100.1 KiB
 file-libs                         x86_64 0:5.46-9.fc44                fedora      11.9 MiB
 filesystem                        x86_64 0:3.18-52.fc44               fedora     112.0   B
 filesystem-srpm-macros            noarch 0:3.18-52.fc44               fedora      38.2 KiB
 fonts-srpm-macros                 noarch 1:5.0.0-2.fc44               fedora      55.8 KiB
 forge-srpm-macros                 noarch 0:0.4.0-4.fc44               fedora      38.9 KiB
 fpc-srpm-macros                   noarch 0:1.3-16.fc44                fedora     144.0   B
 gap-srpm-macros                   noarch 0:2-2.fc44                   fedora       2.1 KiB
 gdb-minimal                       x86_64 0:17.1-2.fc44                fedora      14.3 MiB
 gdbm-libs                         x86_64 1:1.23-11.fc44               fedora     129.6 KiB
 ghc-srpm-macros                   noarch 0:1.10-1.fc44                fedora     792.0   B
 glibc                             x86_64 0:2.43.9000-1.fc45           fedora       7.0 MiB
 glibc-common                      x86_64 0:2.43.9000-1.fc45           fedora       1.0 MiB
 glibc-gconv-extra                 x86_64 0:2.43.9000-1.fc45           fedora       7.7 MiB
 gmp                               x86_64 1:6.3.0-5.fc44               fedora     815.2 KiB
 gnat-srpm-macros                  noarch 0:7-2.fc44                   fedora       1.0 KiB
 gnulib-l10n                       noarch 0:20241231-2.fc44            fedora     655.0 KiB
 gnupg2                            x86_64 0:2.4.9-5.fc44               fedora       6.5 MiB
 gnupg2-dirmngr                    x86_64 0:2.4.9-5.fc44               fedora     633.9 KiB
 gnupg2-gpg-agent                  x86_64 0:2.4.9-5.fc44               fedora     682.5 KiB
 gnupg2-gpgconf                    x86_64 0:2.4.9-5.fc44               fedora     249.7 KiB
 gnupg2-keyboxd                    x86_64 0:2.4.9-5.fc44               fedora     201.2 KiB
 gnupg2-verify                     x86_64 0:2.4.9-5.fc44               fedora     360.3 KiB
 gnutls                            x86_64 0:3.8.12-1.fc45              fedora       3.7 MiB
 go-srpm-macros                    noarch 0:3.8.0-2.fc44               fedora      61.9 KiB
 gpgverify                         noarch 0:2.2-4.fc44                 fedora       8.7 KiB
 ima-evm-utils-libs                x86_64 0:1.6.2-8.fc44               fedora      60.6 KiB
 jansson                           x86_64 0:2.14-4.fc44                fedora      88.9 KiB
 java-srpm-macros                  noarch 0:1-8.fc44                   fedora     870.0   B
 json-c                            x86_64 0:0.18-8.fc44                fedora      82.6 KiB
 kernel-srpm-macros                noarch 0:1.0-28.fc44                fedora       1.9 KiB
 keyutils-libs                     x86_64 0:1.6.3-7.fc44               fedora      54.2 KiB
 krb5-libs                         x86_64 0:1.21.3-12.fc44             fedora       2.4 MiB
 libacl                            x86_64 0:2.3.2-6.fc44               fedora      35.8 KiB
 libarchive                        x86_64 0:3.8.4-2.fc44               fedora     991.2 KiB
 libassuan                         x86_64 0:2.5.7-5.fc44               fedora     163.8 KiB
 libattr                           x86_64 0:2.5.2-8.fc44               fedora      24.3 KiB
 libblkid                          x86_64 0:2.41.3-12.fc44             fedora     274.3 KiB
 libbrotli                         x86_64 0:1.2.0-3.fc44               fedora     865.0 KiB
 libcap                            x86_64 0:2.77-2.fc44                fedora     212.1 KiB
 libcap-ng                         x86_64 0:0.9-7.fc44                 fedora      68.7 KiB
 libcbor                           x86_64 0:0.13.0-2.fc44              fedora      79.5 KiB
 libcom_err                        x86_64 0:1.47.3-4.fc44              fedora      63.0 KiB
 libcurl                           x86_64 0:8.18.0-4.fc45              fedora       1.0 MiB
 libeconf                          x86_64 0:0.7.9-3.fc44               fedora      64.8 KiB
 libevent                          x86_64 0:2.1.12-17.fc44             fedora     978.7 KiB
 libfdisk                          x86_64 0:2.41.3-12.fc44             fedora     388.3 KiB
 libffi                            x86_64 0:3.5.2-2.fc44               fedora      87.7 KiB
 libfido2                          x86_64 0:1.16.0-5.fc44              fedora     246.4 KiB
 libfsverity                       x86_64 0:1.6-4.fc44                 fedora      28.4 KiB
 libgcc                            x86_64 0:16.0.1-0.7.fc45            fedora     270.7 KiB
 libgcrypt                         x86_64 0:1.11.2-1.fc44              fedora       1.6 MiB
 libgomp                           x86_64 0:16.0.1-0.7.fc45            fedora     572.5 KiB
 libgpg-error                      x86_64 0:1.58-2.fc44                fedora     941.6 KiB
 libidn2                           x86_64 0:2.3.8-3.fc44               fedora     556.4 KiB
 libksba                           x86_64 0:1.6.7-5.fc44               fedora     414.4 KiB
 liblastlog2                       x86_64 0:2.41.3-12.fc44             fedora      37.6 KiB
 libmount                          x86_64 0:2.41.3-12.fc44             fedora     388.6 KiB
 libnghttp2                        x86_64 0:1.68.0-3.fc44              fedora     166.1 KiB
 libnghttp3                        x86_64 0:1.15.0-1.fc44              fedora     159.2 KiB
 libpkgconf                        x86_64 0:2.3.0-4.fc44               fedora      78.0 KiB
 libpsl                            x86_64 0:0.21.5-7.fc44              fedora      76.3 KiB
 libselinux                        x86_64 0:3.10-1.fc44                fedora     201.0 KiB
 libselinux-utils                  x86_64 0:3.10-1.fc44                fedora     305.7 KiB
 libsemanage                       x86_64 0:3.10-1.fc44                fedora     312.3 KiB
 libsepol                          x86_64 0:3.10-1.fc44                fedora     870.0 KiB
 libsmartcols                      x86_64 0:2.41.3-12.fc44             fedora     188.3 KiB
 libssh                            x86_64 0:0.12.0-1.fc45              fedora     719.1 KiB
 libssh-config                     noarch 0:0.12.0-1.fc45              fedora     277.0   B
 libstdc++                         x86_64 0:16.0.1-0.7.fc45            fedora       2.9 MiB
 libtasn1                          x86_64 0:4.20.0-3.fc44              fedora     180.2 KiB
 libtool-ltdl                      x86_64 0:2.5.4-10.fc44              fedora      70.0 KiB
 libunistring                      x86_64 0:1.1-11.fc44                fedora       1.7 MiB
 libusb1                           x86_64 0:1.0.29-5.fc44              fedora     175.2 KiB
 libuuid                           x86_64 0:2.41.3-12.fc44             fedora      37.2 KiB
 libverto                          x86_64 0:0.3.2-12.fc44              fedora      25.3 KiB
 libxcrypt                         x86_64 0:4.5.2-3.fc44               fedora     293.2 KiB
 libxml2                           x86_64 0:2.12.10-6.fc44             fedora       1.8 MiB
 libzstd                           x86_64 0:1.5.7-5.fc44               fedora     956.1 KiB
 linkdupes                         x86_64 0:0.7.2-4.fc45               fedora     789.3 KiB
 lua-srpm-macros                   noarch 0:1-17.fc44                  fedora       1.3 KiB
 lua5.4-libs                       x86_64 0:5.5.0-1.fc45               fedora     281.7 KiB
 lz4-libs                          x86_64 0:1.10.0-4.fc44              fedora     157.3 KiB
 mpfr                              x86_64 0:4.2.2-3.fc44               fedora     849.1 KiB
 ncurses-base                      noarch 0:6.6-1.fc44                 fedora     329.7 KiB
 ncurses-libs                      x86_64 0:6.6-1.fc44                 fedora     968.9 KiB
 nettle                            x86_64 0:3.10.1-3.fc44              fedora     794.3 KiB
 ngtcp2                            x86_64 0:1.19.0-2.fc44              fedora     330.2 KiB
 ngtcp2-crypto-ossl                x86_64 0:1.19.0-2.fc44              fedora      51.6 KiB
 npth                              x86_64 0:1.8-4.fc44                 fedora      49.5 KiB
 ocaml-srpm-macros                 noarch 0:11-3.fc44                  fedora       1.9 KiB
 openblas-srpm-macros              noarch 0:2-21.fc44                  fedora     112.0   B
 openldap                          x86_64 0:2.6.10-7.fc44              fedora     667.5 KiB
 openssl-libs                      x86_64 1:3.5.5-1.fc44               fedora       9.2 MiB
 p11-kit                           x86_64 0:0.26.2-1.fc45              fedora       2.6 MiB
 p11-kit-trust                     x86_64 0:0.26.2-1.fc45              fedora     478.3 KiB
 package-notes-srpm-macros         noarch 0:0.17-3.fc45                fedora       1.6 KiB
 pam-libs                          x86_64 0:1.7.2-1.fc44               fedora     130.5 KiB
 pcre2                             x86_64 0:10.47-1.fc44.1             fedora     718.6 KiB
 pcre2-syntax                      noarch 0:10.47-1.fc44.1             fedora     281.9 KiB
 perl-srpm-macros                  noarch 0:1-61.fc44                  fedora     861.0   B
 pkgconf                           x86_64 0:2.3.0-4.fc44               fedora      88.3 KiB
 pkgconf-m4                        noarch 0:2.3.0-4.fc44               fedora      14.4 KiB
 pkgconf-pkg-config                x86_64 0:2.3.0-4.fc44               fedora     989.0   B
 policycoreutils                   x86_64 0:3.10-1.fc44                fedora     884.1 KiB
 popt                              x86_64 0:1.19-10.fc44               fedora     132.6 KiB
 publicsuffix-list-dafsa           noarch 0:20260116-1.fc44            fedora      70.4 KiB
 pyproject-srpm-macros             noarch 0:1.18.6-2.fc44              fedora       1.9 KiB
 python-srpm-macros                noarch 0:3.14-10.fc44               fedora      51.6 KiB
 qt5-srpm-macros                   noarch 0:5.15.18-2.fc44             fedora     500.0   B
 qt6-srpm-macros                   noarch 0:6.10.2-1.fc45              fedora     472.0   B
 readline                          x86_64 0:8.3-4.fc44                 fedora     519.5 KiB
 rpm                               x86_64 0:6.0.1-3.fc45               fedora       3.1 MiB
 rpm-build-libs                    x86_64 0:6.0.1-3.fc45               fedora     276.3 KiB
 rpm-libs                          x86_64 0:6.0.1-3.fc45               fedora     961.2 KiB
 rpm-plugin-selinux                x86_64 0:6.0.1-3.fc45               fedora      11.9 KiB
 rpm-sequoia                       x86_64 0:1.10.0-2.fc44              fedora       2.5 MiB
 rpm-sign-libs                     x86_64 0:6.0.1-3.fc45               fedora      39.6 KiB
 rust-srpm-macros                  noarch 0:28.4-3.fc44                fedora       5.5 KiB
 selinux-policy                    noarch 0:42.23-1.fc44               fedora      32.0 KiB
 selinux-policy-targeted           noarch 0:42.23-1.fc44               fedora      18.5 MiB
 setup                             noarch 0:2.15.0-28.fc44             fedora     724.9 KiB
 sqlite-libs                       x86_64 0:3.51.2-1.fc44              fedora       1.6 MiB
 systemd-libs                      x86_64 0:259.1-1.fc45               fedora       2.4 MiB
 systemd-standalone-sysusers       x86_64 0:259.1-1.fc45               fedora     305.7 KiB
 tpm2-tss                          x86_64 0:4.1.3-9.fc44               fedora       1.6 MiB
 tree-sitter-srpm-macros           noarch 0:0.4.2-2.fc44               fedora       8.3 KiB
 util-linux-core                   x86_64 0:2.41.3-12.fc44             fedora       1.5 MiB
 xxhash-libs                       x86_64 0:0.8.3-4.fc44               fedora      94.0 KiB
 xz-libs                           x86_64 1:5.8.2-2.fc44               fedora     217.7 KiB
 zig-srpm-macros                   noarch 0:1-8.fc44                   fedora       1.3 KiB
 zip                               x86_64 0:3.0-45.fc44                fedora     698.0 KiB
 zlib-ng-compat                    x86_64 0:2.3.3-2.fc45               fedora     165.6 KiB
 zstd                              x86_64 0:1.5.7-5.fc44               fedora     502.4 KiB
Installing groups:
 Buildsystem building group                                                                

Transaction Summary:
 Installing:       184 packages

Total size of inbound packages is 69 MiB. Need to download 0 B.
After this operation, 223 MiB extra will be used (install 223 MiB, remove 0 B).
[  1/184] tar-2:1.35-8.fc44.x86_64      100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  2/184] bzip2-0:1.0.8-23.fc44.x86_64  100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  3/184] redhat-rpm-config-0:343-19.fc 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  4/184] rpm-build-0:6.0.1-3.fc45.x86_ 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  5/184] unzip-0:6.0-69.fc44.x86_64    100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  6/184] cpio-0:2.15-9.fc44.x86_64     100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  7/184] which-0:2.23-4.fc44.x86_64    100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  8/184] bash-0:5.3.9-3.fc44.x86_64    100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[  9/184] coreutils-0:9.10-1.fc45.x86_6 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[ 10/184] grep-0:3.12-3.fc44.x86_64     100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[ 11/184] patch-0:2.8-4.fc44.x86_64     100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[ 12/184] sed-0:4.9-8.fc45.x86_64       100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[ 13/184] shadow-utils-2:4.19.0-6.fc44. 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
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>>> Already downloaded
--------------------------------------------------------------------------------
[184/184] Total                         100% |   0.0   B/s |   0.0   B |  00m00s
Running transaction
Importing OpenPGP key 0xF577861E:
 UserID     : "Fedora (45) <fedora-45-primary@fedoraproject.org>"
 Fingerprint: 4F50A6114CD5C6976A7F1179655A4B02F577861E
 From       : file:///usr/share/distribution-gpg-keys/fedora/RPM-GPG-KEY-fedora-45-primary
The key was successfully imported.
Importing OpenPGP key 0xF577861E:
 UserID     : "Fedora (45) <fedora-45-primary@fedoraproject.org>"
 Fingerprint: 4F50A6114CD5C6976A7F1179655A4B02F577861E
 From       : file:///usr/share/distribution-gpg-keys/fedora/RPM-GPG-KEY-fedora-45-primary
The key was successfully imported.
Importing OpenPGP key 0x6D9F90A6:
 UserID     : "Fedora (44) <fedora-44-primary@fedoraproject.org>"
 Fingerprint: 36F612DCF27F7D1A48A835E4DBFCF71C6D9F90A6
 From       : file:///usr/share/distribution-gpg-keys/fedora/RPM-GPG-KEY-fedora-44-primary
The key was successfully imported.
Importing OpenPGP key 0x91211FCE:
 UserID     : "Fedora (46) <fedora-46-primary@fedoraproject.org>"
 Fingerprint: D924B10D3E810DABDD8B56B596E7E91491211FCE
 From       : file:///usr/share/distribution-gpg-keys/fedora/RPM-GPG-KEY-fedora-46-primary
The key was successfully imported.
[  1/186] Verify package files          100% | 769.0   B/s | 184.0   B |  00m00s
[  2/186] Prepare transaction           100% |   3.8 KiB/s | 184.0   B |  00m00s
[  3/186] Installing libgcc-0:16.0.1-0. 100% | 266.0 MiB/s | 272.4 KiB |  00m00s
[  4/186] Installing libssh-config-0:0. 100% |   0.0   B/s | 816.0   B |  00m00s
[  5/186] Installing publicsuffix-list- 100% |   0.0   B/s |  71.1 KiB |  00m00s
[  6/186] Installing fedora-release-ide 100% |   0.0   B/s | 920.0   B |  00m00s
[  7/186] Installing fedora-repos-rawhi 100% |   0.0   B/s |   2.4 KiB |  00m00s
[  8/186] Installing fedora-gpg-keys-0: 100% |  59.3 MiB/s | 182.1 KiB |  00m00s
[  9/186] Installing fedora-repos-0:45- 100% |   0.0   B/s |   5.7 KiB |  00m00s
[ 10/186] Installing fedora-release-com 100% |  24.2 MiB/s |  24.8 KiB |  00m00s
[ 11/186] Installing fedora-release-0:4 100% |  20.2 KiB/s | 124.0   B |  00m00s
>>> Running sysusers scriptlet: setup-0:2.15.0-28.fc44.noarch
>>> Finished sysusers scriptlet: setup-0:2.15.0-28.fc44.noarch
>>> Scriptlet output:
>>> Creating group 'adm' with GID 4.
>>> Creating group 'audio' with GID 63.
>>> Creating group 'cdrom' with GID 11.
>>> Creating group 'clock' with GID 103.
>>> Creating group 'dialout' with GID 18.
>>> Creating group 'disk' with GID 6.
>>> Creating group 'floppy' with GID 19.
>>> Creating group 'ftp' with GID 50.
>>> Creating group 'games' with GID 20.
>>> Creating group 'input' with GID 104.
>>> Creating group 'kmem' with GID 9.
>>> Creating group 'kvm' with GID 36.
>>> Creating group 'lock' with GID 54.
>>> Creating group 'lp' with GID 7.
>>> Creating group 'mail' with GID 12.
>>> Creating group 'man' with GID 15.
>>> Creating group 'mem' with GID 8.
>>> Creating group 'nobody' with GID 65534.
>>> Creating group 'render' with GID 105.
>>> Creating group 'root' with GID 0.
>>> Creating group 'sgx' with GID 106.
>>> Creating group 'sys' with GID 3.
>>> Creating group 'tape' with GID 33.
>>> Creating group 'tty' with GID 5.
>>> Creating group 'users' with GID 100.
>>> Creating group 'utmp' with GID 22.
>>> Creating group 'video' with GID 39.
>>> Creating group 'wheel' with GID 10.
>>> Creating user 'adm' (adm) with UID 3 and GID 4.
>>> Creating group 'bin' with GID 1.
>>> Creating user 'bin' (bin) with UID 1 and GID 1.
>>> Creating group 'daemon' with GID 2.
>>> Creating user 'daemon' (daemon) with UID 2 and GID 2.
>>> Creating user 'ftp' (FTP User) with UID 14 and GID 50.
>>> Creating user 'games' (games) with UID 12 and GID 100.
>>> Creating user 'halt' (halt) with UID 7 and GID 0.
>>> Creating user 'lp' (lp) with UID 4 and GID 7.
>>> Creating user 'mail' (mail) with UID 8 and GID 12.
>>> Creating user 'nobody' (Kernel Overflow User) with UID 65534 and GID 65534.
>>> Creating user 'operator' (operator) with UID 11 and GID 0.
>>> Creating user 'root' (Super User) with UID 0 and GID 0.
>>> Creating user 'shutdown' (shutdown) with UID 6 and GID 0.
>>> Creating user 'sync' (sync) with UID 5 and GID 0.
>>> 
[ 12/186] Installing setup-0:2.15.0-28. 100% |  54.9 MiB/s | 730.6 KiB |  00m00s
>>> [RPM] /etc/hosts created as /etc/hosts.rpmnew
[ 13/186] Installing filesystem-0:3.18- 100% |   3.1 MiB/s | 212.8 KiB |  00m00s
[ 14/186] Installing pkgconf-m4-0:2.3.0 100% |   0.0   B/s |  14.8 KiB |  00m00s
[ 15/186] Installing pcre2-syntax-0:10. 100% | 277.7 MiB/s | 284.3 KiB |  00m00s
[ 16/186] Installing gnulib-l10n-0:2024 100% | 215.5 MiB/s | 661.9 KiB |  00m00s
[ 17/186] Installing coreutils-common-0 100% | 411.0 MiB/s |  10.7 MiB |  00m00s
[ 18/186] Installing ncurses-base-0:6.6 100% | 115.7 MiB/s | 355.3 KiB |  00m00s
[ 19/186] Installing bash-0:5.3.9-3.fc4 100% | 314.1 MiB/s |   8.5 MiB |  00m00s
[ 20/186] Installing glibc-common-0:2.4 100% |  68.7 MiB/s |   1.0 MiB |  00m00s
[ 21/186] Installing glibc-gconv-extra- 100% | 337.3 MiB/s |   7.8 MiB |  00m00s
[ 22/186] Installing glibc-0:2.43.9000- 100% | 217.6 MiB/s |   7.0 MiB |  00m00s
[ 23/186] Installing ncurses-libs-0:6.6 100% | 317.5 MiB/s | 975.4 KiB |  00m00s
[ 24/186] Installing glibc-minimal-lang 100% |   0.0   B/s | 124.0   B |  00m00s
[ 25/186] Installing zlib-ng-compat-0:2 100% | 162.6 MiB/s | 166.5 KiB |  00m00s
[ 26/186] Installing bzip2-libs-0:1.0.8 100% |   0.0   B/s |  81.6 KiB |  00m00s
[ 27/186] Installing libgpg-error-0:1.5 100% |  71.2 MiB/s | 947.5 KiB |  00m00s
[ 28/186] Installing libstdc++-0:16.0.1 100% | 417.5 MiB/s |   2.9 MiB |  00m00s
[ 29/186] Installing libassuan-0:2.5.7- 100% | 161.8 MiB/s | 165.7 KiB |  00m00s
[ 30/186] Installing libgcrypt-0:1.11.2 100% | 394.0 MiB/s |   1.6 MiB |  00m00s
[ 31/186] Installing readline-0:8.3-4.f 100% | 509.4 MiB/s | 521.6 KiB |  00m00s
[ 32/186] Installing gmp-1:6.3.0-5.fc44 100% | 399.2 MiB/s | 817.5 KiB |  00m00s
[ 33/186] Installing xz-libs-1:5.8.2-2. 100% | 213.7 MiB/s | 218.8 KiB |  00m00s
[ 34/186] Installing libuuid-0:2.41.3-1 100% |   0.0   B/s |  38.2 KiB |  00m00s
[ 35/186] Installing popt-0:1.19-10.fc4 100% |  68.0 MiB/s | 139.3 KiB |  00m00s
[ 36/186] Installing systemd-libs-0:259 100% | 407.0 MiB/s |   2.4 MiB |  00m00s
[ 37/186] Installing libzstd-0:1.5.7-5. 100% | 467.5 MiB/s | 957.4 KiB |  00m00s
[ 38/186] Installing elfutils-libelf-0: 100% | 376.3 MiB/s |   1.1 MiB |  00m00s
[ 39/186] Installing npth-0:1.8-4.fc44. 100% |   0.0   B/s |  50.6 KiB |  00m00s
[ 40/186] Installing libblkid-0:2.41.3- 100% | 269.0 MiB/s | 275.4 KiB |  00m00s
[ 41/186] Installing libxcrypt-0:4.5.2- 100% | 289.0 MiB/s | 295.9 KiB |  00m00s
[ 42/186] Installing libsepol-0:3.10-1. 100% | 425.3 MiB/s | 871.0 KiB |  00m00s
[ 43/186] Installing sqlite-libs-0:3.51 100% | 397.6 MiB/s |   1.6 MiB |  00m00s
[ 44/186] Installing gnupg2-gpgconf-0:2 100% |  22.4 MiB/s | 251.8 KiB |  00m00s
[ 45/186] Installing libattr-0:2.5.2-8. 100% |   0.0   B/s |  25.2 KiB |  00m00s
[ 46/186] Installing libacl-0:2.3.2-6.f 100% |   0.0   B/s |  36.6 KiB |  00m00s
[ 47/186] Installing pcre2-0:10.47-1.fc 100% | 351.6 MiB/s | 720.0 KiB |  00m00s
[ 48/186] Installing libselinux-0:3.10- 100% | 197.5 MiB/s | 202.3 KiB |  00m00s
[ 49/186] Installing grep-0:3.12-3.fc44 100% |  71.6 MiB/s |   1.0 MiB |  00m00s
[ 50/186] Installing sed-0:4.9-8.fc45.x 100% |  65.0 MiB/s | 865.4 KiB |  00m00s
[ 51/186] Installing findutils-1:4.10.0 100% | 124.6 MiB/s |   1.9 MiB |  00m00s
[ 52/186] Installing libtasn1-0:4.20.0- 100% | 177.7 MiB/s | 182.0 KiB |  00m00s
[ 53/186] Installing libunistring-0:1.1 100% | 433.6 MiB/s |   1.7 MiB |  00m00s
[ 54/186] Installing libidn2-0:2.3.8-3. 100% |  68.7 MiB/s | 562.6 KiB |  00m00s
[ 55/186] Installing crypto-policies-0: 100% |  38.5 MiB/s | 157.7 KiB |  00m00s
[ 56/186] Installing xz-1:5.8.2-2.fc44. 100% |  85.6 MiB/s |   1.4 MiB |  00m00s
[ 57/186] Installing libmount-0:2.41.3- 100% | 380.6 MiB/s | 389.7 KiB |  00m00s
[ 58/186] Installing gnupg2-verify-0:2. 100% |  32.1 MiB/s | 361.7 KiB |  00m00s
[ 59/186] Installing dwz-0:0.16-3.fc44. 100% |  25.9 MiB/s | 292.3 KiB |  00m00s
[ 60/186] Installing mpfr-0:4.2.2-3.fc4 100% | 415.4 MiB/s | 850.8 KiB |  00m00s
[ 61/186] Installing gawk-0:5.3.2-3.fc4 100% | 114.6 MiB/s |   1.8 MiB |  00m00s
[ 62/186] Installing libksba-0:1.6.7-5. 100% | 407.1 MiB/s | 416.9 KiB |  00m00s
[ 63/186] Installing unzip-0:6.0-69.fc4 100% |  39.9 MiB/s | 449.3 KiB |  00m00s
[ 64/186] Installing file-libs-0:5.46-9 100% | 741.3 MiB/s |  11.9 MiB |  00m00s
[ 65/186] Installing file-0:5.46-9.fc44 100% |   9.0 MiB/s | 101.6 KiB |  00m00s
[ 66/186] Installing diffutils-0:3.12-5 100% | 112.3 MiB/s |   1.6 MiB |  00m00s
[ 67/186] Installing libeconf-0:0.7.9-3 100% |   0.0   B/s |  66.4 KiB |  00m00s
[ 68/186] Installing libcap-ng-0:0.9-7. 100% |   0.0   B/s |  70.5 KiB |  00m00s
[ 69/186] Installing audit-libs-0:4.1.3 100% | 383.8 MiB/s | 393.1 KiB |  00m00s
[ 70/186] Installing pam-libs-0:1.7.2-1 100% | 129.8 MiB/s | 132.9 KiB |  00m00s
[ 71/186] Installing libcap-0:2.77-2.fc 100% |  19.3 MiB/s | 217.2 KiB |  00m00s
[ 72/186] Installing libsemanage-0:3.10 100% | 306.7 MiB/s | 314.1 KiB |  00m00s
[ 73/186] Installing libsmartcols-0:2.4 100% | 184.9 MiB/s | 189.3 KiB |  00m00s
[ 74/186] Installing lua5.4-libs-0:5.5. 100% | 276.3 MiB/s | 283.0 KiB |  00m00s
[ 75/186] Installing json-c-0:0.18-8.fc 100% |  81.9 MiB/s |  83.9 KiB |  00m00s
[ 76/186] Installing libffi-0:3.5.2-2.f 100% |  87.0 MiB/s |  89.1 KiB |  00m00s
[ 77/186] Installing p11-kit-0:0.26.2-1 100% | 144.2 MiB/s |   2.6 MiB |  00m00s
[ 78/186] Installing alternatives-0:1.3 100% |   6.2 MiB/s |  63.6 KiB |  00m00s
[ 79/186] Installing p11-kit-trust-0:0. 100% |  26.0 MiB/s | 480.0 KiB |  00m00s
[ 80/186] Installing ngtcp2-0:1.19.0-2. 100% | 323.9 MiB/s | 331.7 KiB |  00m00s
[ 81/186] Installing openssl-libs-1:3.5 100% | 417.7 MiB/s |   9.2 MiB |  00m00s
[ 82/186] Installing coreutils-0:9.10-1 100% | 189.7 MiB/s |   5.7 MiB |  00m00s
[ 83/186] Installing ca-certificates-0: 100% |   2.3 MiB/s |   2.5 MiB |  00m01s
[ 84/186] Installing gzip-0:1.14-2.fc44 100% |  30.6 MiB/s | 407.1 KiB |  00m00s
[ 85/186] Installing rpm-sequoia-0:1.10 100% | 411.0 MiB/s |   2.5 MiB |  00m00s
[ 86/186] Installing libfsverity-0:1.6- 100% |   0.0   B/s |  29.4 KiB |  00m00s
[ 87/186] Installing libevent-0:2.1.12- 100% | 319.8 MiB/s | 982.4 KiB |  00m00s
[ 88/186] Installing ngtcp2-crypto-ossl 100% |  51.2 MiB/s |  52.5 KiB |  00m00s
[ 89/186] Installing util-linux-core-0: 100% |  92.7 MiB/s |   1.5 MiB |  00m00s
[ 90/186] Installing zip-0:3.0-45.fc44. 100% |  57.1 MiB/s | 701.9 KiB |  00m00s
[ 91/186] Installing gnupg2-keyboxd-0:2 100% |  28.2 MiB/s | 202.5 KiB |  00m00s
[ 92/186] Installing libpsl-0:0.21.5-7. 100% |  75.6 MiB/s |  77.4 KiB |  00m00s
[ 93/186] Installing tar-2:1.35-8.fc44. 100% | 165.4 MiB/s |   3.0 MiB |  00m00s
[ 94/186] Installing linkdupes-0:0.7.2- 100% |  59.4 MiB/s | 790.7 KiB |  00m00s
[ 95/186] Installing libselinux-utils-0 100% |  26.0 MiB/s | 320.1 KiB |  00m00s
[ 96/186] Installing liblastlog2-0:2.41 100% |   7.8 MiB/s |  39.8 KiB |  00m00s
[ 97/186] Installing systemd-standalone 100% |  24.9 MiB/s | 306.2 KiB |  00m00s
[ 98/186] Installing rpm-libs-0:6.0.1-3 100% | 313.4 MiB/s | 962.7 KiB |  00m00s
[ 99/186] Installing libfdisk-0:2.41.3- 100% | 190.2 MiB/s | 389.4 KiB |  00m00s
[100/186] Installing util-linux-0:2.41. 100% | 115.6 MiB/s |   3.6 MiB |  00m00s
[101/186] Installing policycoreutils-0: 100% |  40.5 MiB/s | 912.6 KiB |  00m00s
[102/186] Installing selinux-policy-0:4 100% |   2.1 MiB/s |  33.6 KiB |  00m00s
[103/186] Installing selinux-policy-tar 100% | 214.6 MiB/s |  14.8 MiB |  00m00s
[104/186] Installing zstd-0:1.5.7-5.fc4 100% |  35.3 MiB/s | 506.0 KiB |  00m00s
[105/186] Installing libusb1-0:1.0.29-5 100% |  24.7 MiB/s | 176.9 KiB |  00m00s
>>> Running sysusers scriptlet: tpm2-tss-0:4.1.3-9.fc44.x86_64
>>> Finished sysusers scriptlet: tpm2-tss-0:4.1.3-9.fc44.x86_64
>>> Scriptlet output:
>>> Creating group 'tss' with GID 59.
>>> Creating user 'tss' (Account used for TPM access) with UID 59 and GID 59.
>>> 
[106/186] Installing tpm2-tss-0:4.1.3-9 100% | 326.6 MiB/s |   1.6 MiB |  00m00s
[107/186] Installing ima-evm-utils-libs 100% |  60.4 MiB/s |  61.9 KiB |  00m00s
[108/186] Installing gnupg2-gpg-agent-0 100% |  37.2 MiB/s | 686.5 KiB |  00m00s
[109/186] Installing libxml2-0:2.12.10- 100% | 118.0 MiB/s |   1.8 MiB |  00m00s
[110/186] Installing nettle-0:3.10.1-3. 100% | 389.4 MiB/s | 797.4 KiB |  00m00s
[111/186] Installing gnutls-0:3.8.12-1. 100% | 415.1 MiB/s |   3.7 MiB |  00m00s
[112/186] Installing bzip2-0:1.0.8-23.f 100% |   8.8 MiB/s |  99.5 KiB |  00m00s
[113/186] Installing add-determinism-0: 100% | 146.0 MiB/s |   2.2 MiB |  00m00s
[114/186] Installing build-reproducibil 100% |   0.0   B/s |   1.5 KiB |  00m00s
[115/186] Installing cpio-0:2.15-9.fc44 100% |  78.8 MiB/s |   1.1 MiB |  00m00s
[116/186] Installing ed-0:1.22.4-2.fc44 100% |  13.4 MiB/s | 151.4 KiB |  00m00s
[117/186] Installing patch-0:2.8-4.fc44 100% |  20.2 MiB/s | 228.1 KiB |  00m00s
[118/186] Installing lz4-libs-0:1.10.0- 100% | 154.6 MiB/s | 158.4 KiB |  00m00s
[119/186] Installing libarchive-0:3.8.4 100% | 323.3 MiB/s | 993.1 KiB |  00m00s
[120/186] Installing libgomp-0:16.0.1-0 100% | 560.4 MiB/s | 573.9 KiB |  00m00s
[121/186] Installing libtool-ltdl-0:2.5 100% |  69.5 MiB/s |  71.1 KiB |  00m00s
[122/186] Installing gdbm-libs-1:1.23-1 100% | 128.3 MiB/s | 131.3 KiB |  00m00s
[123/186] Installing cyrus-sasl-lib-0:2 100% | 144.4 MiB/s |   2.3 MiB |  00m00s
[124/186] Installing openldap-0:2.6.10- 100% | 327.8 MiB/s | 671.3 KiB |  00m00s
[125/186] Installing gnupg2-dirmngr-0:2 100% |  34.5 MiB/s | 636.6 KiB |  00m00s
[126/186] Installing gnupg2-0:2.4.9-5.f 100% | 250.3 MiB/s |   6.5 MiB |  00m00s
[127/186] Installing rpm-sign-libs-0:6. 100% |   0.0   B/s |  40.5 KiB |  00m00s
[128/186] Installing gpgverify-0:2.2-4. 100% |   0.0   B/s |   9.4 KiB |  00m00s
[129/186] Installing jansson-0:2.14-4.f 100% |  88.2 MiB/s |  90.3 KiB |  00m00s
[130/186] Installing libpkgconf-0:2.3.0 100% |  77.3 MiB/s |  79.2 KiB |  00m00s
[131/186] Installing pkgconf-0:2.3.0-4. 100% |   8.1 MiB/s |  90.8 KiB |  00m00s
[132/186] Installing pkgconf-pkg-config 100% | 177.3 KiB/s |   1.8 KiB |  00m00s
[133/186] Installing xxhash-libs-0:0.8. 100% |  93.2 MiB/s |  95.4 KiB |  00m00s
[134/186] Installing libbrotli-0:1.2.0- 100% | 282.3 MiB/s | 867.3 KiB |  00m00s
[135/186] Installing libnghttp2-0:1.68. 100% | 163.3 MiB/s | 167.3 KiB |  00m00s
[136/186] Installing libnghttp3-0:1.15. 100% | 156.8 MiB/s | 160.6 KiB |  00m00s
[137/186] Installing keyutils-libs-0:1. 100% |  54.3 MiB/s |  55.6 KiB |  00m00s
[138/186] Installing libcom_err-0:1.47. 100% |   0.0   B/s |  64.1 KiB |  00m00s
[139/186] Installing libverto-0:0.3.2-1 100% |  26.4 MiB/s |  27.1 KiB |  00m00s
[140/186] Installing krb5-libs-0:1.21.3 100% | 337.9 MiB/s |   2.4 MiB |  00m00s
[141/186] Installing libcbor-0:0.13.0-2 100% |  79.0 MiB/s |  80.9 KiB |  00m00s
[142/186] Installing libfido2-0:1.16.0- 100% | 242.1 MiB/s | 247.9 KiB |  00m00s
[143/186] Installing libssh-0:0.12.0-1. 100% | 352.1 MiB/s | 721.2 KiB |  00m00s
[144/186] Installing libcurl-0:8.18.0-4 100% | 331.4 MiB/s |   1.0 MiB |  00m00s
[145/186] Installing curl-0:8.18.0-4.fc 100% |  24.8 MiB/s | 482.6 KiB |  00m00s
[146/186] Installing rpm-0:6.0.1-3.fc45 100% |  91.1 MiB/s |   2.6 MiB |  00m00s
[147/186] Installing cmake-srpm-macros- 100% |   0.0   B/s | 804.0   B |  00m00s
[148/186] Installing efi-srpm-macros-0: 100% |   0.0   B/s |  41.2 KiB |  00m00s
[149/186] Installing java-srpm-macros-0 100% |   0.0   B/s |   1.1 KiB |  00m00s
[150/186] Installing lua-srpm-macros-0: 100% |   0.0   B/s |   1.9 KiB |  00m00s
[151/186] Installing tree-sitter-srpm-m 100% |   0.0   B/s |   9.3 KiB |  00m00s
[152/186] Installing zig-srpm-macros-0: 100% |   0.0   B/s |   1.9 KiB |  00m00s
[153/186] Installing filesystem-srpm-ma 100% |   0.0   B/s |  38.9 KiB |  00m00s
[154/186] Installing elfutils-default-y 100% | 681.0 KiB/s |   2.0 KiB |  00m00s
[155/186] Installing elfutils-libs-0:0. 100% | 233.4 MiB/s | 717.0 KiB |  00m00s
[156/186] Installing elfutils-debuginfo 100% |   7.0 MiB/s |  86.0 KiB |  00m00s
[157/186] Installing elfutils-0:0.194-3 100% | 174.1 MiB/s |   3.0 MiB |  00m00s
[158/186] Installing binutils-0:2.46-1. 100% | 363.7 MiB/s |  27.3 MiB |  00m00s
[159/186] Installing gdb-minimal-0:17.1 100% | 325.7 MiB/s |  14.3 MiB |  00m00s
[160/186] Installing debugedit-0:5.2-6. 100% |  18.0 MiB/s | 221.6 KiB |  00m00s
[161/186] Installing rpm-build-libs-0:6 100% | 270.7 MiB/s | 277.2 KiB |  00m00s
[162/186] Installing rust-srpm-macros-0 100% |   0.0   B/s |   6.4 KiB |  00m00s
[163/186] Installing qt6-srpm-macros-0: 100% |   0.0   B/s | 748.0   B |  00m00s
[164/186] Installing qt5-srpm-macros-0: 100% |   0.0   B/s | 776.0   B |  00m00s
[165/186] Installing perl-srpm-macros-0 100% |   0.0   B/s |   1.1 KiB |  00m00s
[166/186] Installing package-notes-srpm 100% |   0.0   B/s |   2.1 KiB |  00m00s
[167/186] Installing openblas-srpm-macr 100% |   0.0   B/s | 392.0   B |  00m00s
[168/186] Installing ocaml-srpm-macros- 100% |   0.0   B/s |   2.1 KiB |  00m00s
[169/186] Installing kernel-srpm-macros 100% |   0.0   B/s |   2.3 KiB |  00m00s
[170/186] Installing gnat-srpm-macros-0 100% |   0.0   B/s |   1.3 KiB |  00m00s
[171/186] Installing ghc-srpm-macros-0: 100% |   0.0   B/s |   1.0 KiB |  00m00s
[172/186] Installing gap-srpm-macros-0: 100% |   0.0   B/s |   2.7 KiB |  00m00s
[173/186] Installing fpc-srpm-macros-0: 100% |   0.0   B/s | 420.0   B |  00m00s
[174/186] Installing ansible-srpm-macro 100% |   0.0   B/s |  36.2 KiB |  00m00s
[175/186] Installing rpm-build-0:6.0.1- 100% |  17.4 MiB/s | 303.7 KiB |  00m00s
[176/186] Installing pyproject-srpm-mac 100% |   0.0   B/s |   2.5 KiB |  00m00s
[177/186] Installing redhat-rpm-config- 100% | 185.4 MiB/s | 189.9 KiB |  00m00s
[178/186] Installing forge-srpm-macros- 100% |   0.0   B/s |  40.3 KiB |  00m00s
[179/186] Installing fonts-srpm-macros- 100% |   0.0   B/s |  57.0 KiB |  00m00s
[180/186] Installing go-srpm-macros-0:3 100% |   0.0   B/s |  63.0 KiB |  00m00s
[181/186] Installing R-srpm-macros-0:1. 100% |   0.0   B/s |   4.2 KiB |  00m00s
[182/186] Installing python-srpm-macros 100% |   0.0   B/s |  52.9 KiB |  00m00s
[183/186] Installing rpm-plugin-selinux 100% |   0.0   B/s |  12.9 KiB |  00m00s
[184/186] Installing which-0:2.23-4.fc4 100% |   7.0 MiB/s |  85.6 KiB |  00m00s
[185/186] Installing shadow-utils-2:4.1 100% | 160.9 MiB/s |   4.0 MiB |  00m00s
[186/186] Installing info-0:7.2-7.fc44. 100% |  57.0 KiB/s | 358.3 KiB |  00m06s
Complete!
Finish: installing minimal buildroot with dnf5
Start: creating root cache
Finish: creating root cache
Finish: chroot init
INFO: Installed packages:
INFO: R-srpm-macros-1.3.4-3.fc44.noarch
add-determinism-0.7.2-4.fc45.x86_64
alternatives-1.33-5.fc44.x86_64
ansible-srpm-macros-1-20.1.fc44.noarch
audit-libs-4.1.3-1.fc44.x86_64
bash-5.3.9-3.fc44.x86_64
binutils-2.46-1.fc45.x86_64
build-reproducibility-srpm-macros-0.7.2-4.fc45.noarch
bzip2-1.0.8-23.fc44.x86_64
bzip2-libs-1.0.8-23.fc44.x86_64
ca-certificates-2025.2.80_v9.0.304-5.fc44.noarch
cmake-srpm-macros-4.2.3-1.fc45.noarch
coreutils-9.10-1.fc45.x86_64
coreutils-common-9.10-1.fc45.x86_64
cpio-2.15-9.fc44.x86_64
crypto-policies-20251128-3.git19878fe.fc44.noarch
curl-8.18.0-4.fc45.x86_64
cyrus-sasl-lib-2.1.28-35.fc44.x86_64
debugedit-5.2-6.fc44.x86_64
diffutils-3.12-5.fc44.x86_64
dwz-0.16-3.fc44.x86_64
ed-1.22.4-2.fc44.x86_64
efi-srpm-macros-6-6.fc44.noarch
elfutils-0.194-3.fc44.x86_64
elfutils-debuginfod-client-0.194-3.fc44.x86_64
elfutils-default-yama-scope-0.194-3.fc44.noarch
elfutils-libelf-0.194-3.fc44.x86_64
elfutils-libs-0.194-3.fc44.x86_64
fedora-gpg-keys-45-0.1.noarch
fedora-release-45-0.1.noarch
fedora-release-common-45-0.1.noarch
fedora-release-identity-basic-45-0.1.noarch
fedora-repos-45-0.1.noarch
fedora-repos-rawhide-45-0.1.noarch
file-5.46-9.fc44.x86_64
file-libs-5.46-9.fc44.x86_64
filesystem-3.18-52.fc44.x86_64
filesystem-srpm-macros-3.18-52.fc44.noarch
findutils-4.10.0-7.fc44.x86_64
fonts-srpm-macros-5.0.0-2.fc44.noarch
forge-srpm-macros-0.4.0-4.fc44.noarch
fpc-srpm-macros-1.3-16.fc44.noarch
gap-srpm-macros-2-2.fc44.noarch
gawk-5.3.2-3.fc44.x86_64
gdb-minimal-17.1-2.fc44.x86_64
gdbm-libs-1.23-11.fc44.x86_64
ghc-srpm-macros-1.10-1.fc44.noarch
glibc-2.43.9000-1.fc45.x86_64
glibc-common-2.43.9000-1.fc45.x86_64
glibc-gconv-extra-2.43.9000-1.fc45.x86_64
glibc-minimal-langpack-2.43.9000-1.fc45.x86_64
gmp-6.3.0-5.fc44.x86_64
gnat-srpm-macros-7-2.fc44.noarch
gnulib-l10n-20241231-2.fc44.noarch
gnupg2-2.4.9-5.fc44.x86_64
gnupg2-dirmngr-2.4.9-5.fc44.x86_64
gnupg2-gpg-agent-2.4.9-5.fc44.x86_64
gnupg2-gpgconf-2.4.9-5.fc44.x86_64
gnupg2-keyboxd-2.4.9-5.fc44.x86_64
gnupg2-verify-2.4.9-5.fc44.x86_64
gnutls-3.8.12-1.fc45.x86_64
go-srpm-macros-3.8.0-2.fc44.noarch
gpg-pubkey-36f612dcf27f7d1a48a835e4dbfcf71c6d9f90a6-6786af3b
gpg-pubkey-4f50a6114cd5c6976a7f1179655a4b02f577861e-6888bc98
gpg-pubkey-d924b10d3e810dabdd8b56b596e7e91491211fce-697c9899
gpgverify-2.2-4.fc44.noarch
grep-3.12-3.fc44.x86_64
gzip-1.14-2.fc44.x86_64
ima-evm-utils-libs-1.6.2-8.fc44.x86_64
info-7.2-7.fc44.x86_64
jansson-2.14-4.fc44.x86_64
java-srpm-macros-1-8.fc44.noarch
json-c-0.18-8.fc44.x86_64
kernel-srpm-macros-1.0-28.fc44.noarch
keyutils-libs-1.6.3-7.fc44.x86_64
krb5-libs-1.21.3-12.fc44.x86_64
libacl-2.3.2-6.fc44.x86_64
libarchive-3.8.4-2.fc44.x86_64
libassuan-2.5.7-5.fc44.x86_64
libattr-2.5.2-8.fc44.x86_64
libblkid-2.41.3-12.fc44.x86_64
libbrotli-1.2.0-3.fc44.x86_64
libcap-2.77-2.fc44.x86_64
libcap-ng-0.9-7.fc44.x86_64
libcbor-0.13.0-2.fc44.x86_64
libcom_err-1.47.3-4.fc44.x86_64
libcurl-8.18.0-4.fc45.x86_64
libeconf-0.7.9-3.fc44.x86_64
libevent-2.1.12-17.fc44.x86_64
libfdisk-2.41.3-12.fc44.x86_64
libffi-3.5.2-2.fc44.x86_64
libfido2-1.16.0-5.fc44.x86_64
libfsverity-1.6-4.fc44.x86_64
libgcc-16.0.1-0.7.fc45.x86_64
libgcrypt-1.11.2-1.fc44.x86_64
libgomp-16.0.1-0.7.fc45.x86_64
libgpg-error-1.58-2.fc44.x86_64
libidn2-2.3.8-3.fc44.x86_64
libksba-1.6.7-5.fc44.x86_64
liblastlog2-2.41.3-12.fc44.x86_64
libmount-2.41.3-12.fc44.x86_64
libnghttp2-1.68.0-3.fc44.x86_64
libnghttp3-1.15.0-1.fc44.x86_64
libpkgconf-2.3.0-4.fc44.x86_64
libpsl-0.21.5-7.fc44.x86_64
libselinux-3.10-1.fc44.x86_64
libselinux-utils-3.10-1.fc44.x86_64
libsemanage-3.10-1.fc44.x86_64
libsepol-3.10-1.fc44.x86_64
libsmartcols-2.41.3-12.fc44.x86_64
libssh-0.12.0-1.fc45.x86_64
libssh-config-0.12.0-1.fc45.noarch
libstdc++-16.0.1-0.7.fc45.x86_64
libtasn1-4.20.0-3.fc44.x86_64
libtool-ltdl-2.5.4-10.fc44.x86_64
libunistring-1.1-11.fc44.x86_64
libusb1-1.0.29-5.fc44.x86_64
libuuid-2.41.3-12.fc44.x86_64
libverto-0.3.2-12.fc44.x86_64
libxcrypt-4.5.2-3.fc44.x86_64
libxml2-2.12.10-6.fc44.x86_64
libzstd-1.5.7-5.fc44.x86_64
linkdupes-0.7.2-4.fc45.x86_64
lua-srpm-macros-1-17.fc44.noarch
lua5.4-libs-5.5.0-1.fc45.x86_64
lz4-libs-1.10.0-4.fc44.x86_64
mpfr-4.2.2-3.fc44.x86_64
ncurses-base-6.6-1.fc44.noarch
ncurses-libs-6.6-1.fc44.x86_64
nettle-3.10.1-3.fc44.x86_64
ngtcp2-1.19.0-2.fc44.x86_64
ngtcp2-crypto-ossl-1.19.0-2.fc44.x86_64
npth-1.8-4.fc44.x86_64
ocaml-srpm-macros-11-3.fc44.noarch
openblas-srpm-macros-2-21.fc44.noarch
openldap-2.6.10-7.fc44.x86_64
openssl-libs-3.5.5-1.fc44.x86_64
p11-kit-0.26.2-1.fc45.x86_64
p11-kit-trust-0.26.2-1.fc45.x86_64
package-notes-srpm-macros-0.17-3.fc45.noarch
pam-libs-1.7.2-1.fc44.x86_64
patch-2.8-4.fc44.x86_64
pcre2-10.47-1.fc44.1.x86_64
pcre2-syntax-10.47-1.fc44.1.noarch
perl-srpm-macros-1-61.fc44.noarch
pkgconf-2.3.0-4.fc44.x86_64
pkgconf-m4-2.3.0-4.fc44.noarch
pkgconf-pkg-config-2.3.0-4.fc44.x86_64
policycoreutils-3.10-1.fc44.x86_64
popt-1.19-10.fc44.x86_64
publicsuffix-list-dafsa-20260116-1.fc44.noarch
pyproject-srpm-macros-1.18.6-2.fc44.noarch
python-srpm-macros-3.14-10.fc44.noarch
qt5-srpm-macros-5.15.18-2.fc44.noarch
qt6-srpm-macros-6.10.2-1.fc45.noarch
readline-8.3-4.fc44.x86_64
redhat-rpm-config-343-19.fc44.noarch
rpm-6.0.1-3.fc45.x86_64
rpm-build-6.0.1-3.fc45.x86_64
rpm-build-libs-6.0.1-3.fc45.x86_64
rpm-libs-6.0.1-3.fc45.x86_64
rpm-plugin-selinux-6.0.1-3.fc45.x86_64
rpm-sequoia-1.10.0-2.fc44.x86_64
rpm-sign-libs-6.0.1-3.fc45.x86_64
rust-srpm-macros-28.4-3.fc44.noarch
sed-4.9-8.fc45.x86_64
selinux-policy-42.23-1.fc44.noarch
selinux-policy-targeted-42.23-1.fc44.noarch
setup-2.15.0-28.fc44.noarch
shadow-utils-4.19.0-6.fc44.x86_64
sqlite-libs-3.51.2-1.fc44.x86_64
systemd-libs-259.1-1.fc45.x86_64
systemd-standalone-sysusers-259.1-1.fc45.x86_64
tar-1.35-8.fc44.x86_64
tpm2-tss-4.1.3-9.fc44.x86_64
tree-sitter-srpm-macros-0.4.2-2.fc44.noarch
unzip-6.0-69.fc44.x86_64
util-linux-2.41.3-12.fc44.x86_64
util-linux-core-2.41.3-12.fc44.x86_64
which-2.23-4.fc44.x86_64
xxhash-libs-0.8.3-4.fc44.x86_64
xz-5.8.2-2.fc44.x86_64
xz-libs-5.8.2-2.fc44.x86_64
zig-srpm-macros-1-8.fc44.noarch
zip-3.0-45.fc44.x86_64
zlib-ng-compat-2.3.3-2.fc45.x86_64
zstd-1.5.7-5.fc44.x86_64
Start: buildsrpm
Start: rpmbuild -bs
Building target platforms: x86_64
Building for target x86_64
setting SOURCE_DATE_EPOCH=1768608000
Wrote: /builddir/build/SRPMS/xtensor-python-0.28.0-2.fc45.src.rpm
Finish: rpmbuild -bs
INFO: chroot_scan: 1 files copied to /var/lib/copr-rpmbuild/results/chroot_scan
INFO: /var/lib/mock/fedora-rawhide-x86_64-1770904388.326455/root/var/log/dnf5.log
INFO: chroot_scan: creating tarball /var/lib/copr-rpmbuild/results/chroot_scan.tar.gz
/bin/tar: Removing leading `/' from member names
Finish: buildsrpm
INFO: Done(/var/lib/copr-rpmbuild/workspace/workdir-irgmzx7p/xtensor-python/xtensor-python.spec) Config(child) 0 minutes 15 seconds
INFO: Results and/or logs in: /var/lib/copr-rpmbuild/results
INFO: Cleaning up build root ('cleanup_on_success=True')
Start: clean chroot
INFO: unmounting tmpfs.
Finish: clean chroot
INFO: Start(/var/lib/copr-rpmbuild/results/xtensor-python-0.28.0-2.fc45.src.rpm)  Config(fedora-rawhide-x86_64)
Start(bootstrap): chroot init
INFO: mounting tmpfs at /var/lib/mock/fedora-rawhide-x86_64-bootstrap-1770904388.326455/root.
INFO: reusing tmpfs at /var/lib/mock/fedora-rawhide-x86_64-bootstrap-1770904388.326455/root.
INFO: calling preinit hooks
INFO: enabled root cache
INFO: enabled package manager cache
Start(bootstrap): cleaning package manager metadata
Finish(bootstrap): cleaning package manager metadata
Finish(bootstrap): chroot init
Start: chroot init
INFO: mounting tmpfs at /var/lib/mock/fedora-rawhide-x86_64-1770904388.326455/root.
INFO: calling preinit hooks
INFO: enabled root cache
Start: unpacking root cache
Finish: unpacking root cache
INFO: enabled package manager cache
Start: cleaning package manager metadata
Finish: cleaning package manager metadata
INFO: enabled HW Info plugin
INFO: Buildroot is handled by package management downloaded with a bootstrap image:
  rpm-6.0.1-3.fc45.x86_64
  rpm-sequoia-1.10.0-2.fc44.x86_64
  dnf5-5.3.0.0-7.fc44.x86_64
  dnf5-plugins-5.3.0.0-7.fc44.x86_64
Finish: chroot init
Start: build phase for xtensor-python-0.28.0-2.fc45.src.rpm
Start: build setup for xtensor-python-0.28.0-2.fc45.src.rpm
Building target platforms: x86_64
Building for target x86_64
setting SOURCE_DATE_EPOCH=1768608000
Wrote: /builddir/build/SRPMS/xtensor-python-0.28.0-2.fc45.src.rpm
Updating and loading repositories:
 Copr repository                        100% |  10.5 KiB/s |   1.5 KiB |  00m00s
 fedora                                 100% |  61.2 KiB/s |  25.9 KiB |  00m00s
Repositories loaded.
Package                    Arch   Version            Repository      Size
Installing:
 cmake                     x86_64 0:4.2.3-1.fc45     fedora      39.0 MiB
 gcc-c++                   x86_64 0:16.0.1-0.7.fc45  fedora      46.3 MiB
 gtest-devel               x86_64 0:1.17.0-2.fc44    fedora       1.1 MiB
 make                      x86_64 1:4.4.1-12.fc44    fedora       1.8 MiB
 pybind11-devel            x86_64 0:3.0-3.fc44       fedora       1.0 MiB
 python3-devel             x86_64 0:3.14.3-1.fc45    fedora       1.9 MiB
 python3-numpy             x86_64 1:2.4.2-1.fc44     fedora      41.3 MiB
 python3-pytest            noarch 0:8.4.2-2.fc44     fedora      22.5 MiB
 python3-setuptools        noarch 0:80.10.2-1.fc44   fedora       7.5 MiB
 xtensor-devel             x86_64 0:0.27.0-2.fc44    fedora       1.9 MiB
Installing dependencies:
 annobin-docs              noarch 0:13.05-3.fc44     fedora      99.2 KiB
 annobin-plugin-gcc        x86_64 0:13.05-3.fc44     fedora     695.7 KiB
 cmake-data                noarch 0:4.2.3-1.fc45     fedora       9.3 MiB
 cmake-filesystem          x86_64 0:4.2.3-1.fc45     fedora       0.0   B
 cmake-rpm-macros          noarch 0:4.2.3-1.fc45     fedora       8.3 KiB
 cpp                       x86_64 0:16.0.1-0.7.fc45  fedora      42.2 MiB
 emacs-filesystem          x86_64 1:30.2-2.fc44      fedora       0.0   B
 expat                     x86_64 0:2.7.3-2.fc44     fedora     316.8 KiB
 flexiblas                 x86_64 0:3.5.0-2.fc44     fedora      38.0 KiB
 flexiblas-netlib          x86_64 0:3.5.0-2.fc44     fedora      16.3 MiB
 flexiblas-openblas-openmp x86_64 0:3.5.0-2.fc44     fedora      39.1 KiB
 gcc                       x86_64 0:16.0.1-0.7.fc45  fedora     120.8 MiB
 gcc-plugin-annobin        x86_64 0:16.0.1-0.7.fc45  fedora      57.2 KiB
 glibc-devel               x86_64 0:2.43.9000-1.fc45 fedora       2.3 MiB
 gmock                     x86_64 0:1.17.0-2.fc44    fedora     142.8 KiB
 gtest                     x86_64 0:1.17.0-2.fc44    fedora     513.5 KiB
 jsoncpp                   x86_64 0:1.9.6-3.fc44     fedora     285.6 KiB
 kernel-headers            x86_64 0:6.19.0-59.fc45   fedora       6.9 MiB
 libatomic                 x86_64 0:16.0.1-0.7.fc45  fedora      45.5 KiB
 libgfortran               x86_64 0:16.0.1-0.7.fc45  fedora       3.4 MiB
 libmpc                    x86_64 0:1.3.1-9.fc44     fedora     160.4 KiB
 libquadmath               x86_64 0:16.0.1-0.7.fc45  fedora     325.9 KiB
 libstdc++-devel           x86_64 0:16.0.1-0.7.fc45  fedora      38.7 MiB
 libuv                     x86_64 1:1.51.0-3.fc44    fedora     582.8 KiB
 libxcrypt-devel           x86_64 0:4.5.2-3.fc44     fedora      31.0 KiB
 mpdecimal                 x86_64 0:4.0.1-3.fc44     fedora     217.1 KiB
 openblas                  x86_64 0:0.3.29-2.fc43    fedora     111.7 KiB
 openblas-openmp           x86_64 0:0.3.29-2.fc43    fedora      43.7 MiB
 pyproject-rpm-macros      noarch 0:1.18.6-2.fc44    fedora     115.6 KiB
 python-pip-wheel          noarch 0:25.3-2.fc44      fedora       1.2 MiB
 python-rpm-macros         noarch 0:3.14-10.fc44     fedora      27.6 KiB
 python3                   x86_64 0:3.14.3-1.fc45    fedora      28.7 KiB
 python3-iniconfig         noarch 0:2.3.0-2.fc44     fedora      49.8 KiB
 python3-libs              x86_64 0:3.14.3-1.fc45    fedora      43.7 MiB
 python3-numpy-f2py        x86_64 1:2.4.2-1.fc44     fedora       2.1 MiB
 python3-packaging         noarch 0:25.0-8.fc44      fedora     607.4 KiB
 python3-pluggy            noarch 0:1.6.0-5.fc44     fedora     211.5 KiB
 python3-pygments          noarch 0:2.19.1-9.fc44    fedora      11.3 MiB
 python3-rpm-generators    noarch 0:14-14.fc44       fedora      81.7 KiB
 python3-rpm-macros        noarch 0:3.14-10.fc44     fedora       6.5 KiB
 rhash                     x86_64 0:1.4.5-4.fc44     fedora     354.8 KiB
 tzdata                    noarch 0:2025c-2.fc44     fedora       1.2 MiB
 vim-filesystem            noarch 2:9.1.2128-2.fc44  fedora      40.0   B
 xsimd-devel               noarch 0:13.2.0-4.fc44    fedora       1.4 MiB
 xtl-devel                 x86_64 0:0.8.1-2.fc44     fedora     641.2 KiB

Transaction Summary:
 Installing:        55 packages

Total size of inbound packages is 142 MiB. Need to download 1 MiB.
After this operation, 515 MiB extra will be used (install 515 MiB, remove 0 B).
[ 1/55] make-1:4.4.1-12.fc44.x86_64     100% |   0.0   B/s |   0.0   B |  00m00s
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[ 4/55] python3-setuptools-0:80.10.2-1. 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
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[10/55] python3-iniconfig-0:2.3.0-2.fc4 100% |   0.0   B/s |   0.0   B |  00m00s
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[11/55] python3-packaging-0:25.0-8.fc44 100% |   0.0   B/s |   0.0   B |  00m00s
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[23/55] flexiblas-0:3.5.0-2.fc44.x86_64 100% |   0.0   B/s |   0.0   B |  00m00s
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[40/55] kernel-headers-0:6.19.0-59.fc45 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[41/55] annobin-plugin-gcc-0:13.05-3.fc 100% |   0.0   B/s |   0.0   B |  00m00s
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>>> Already downloaded
[44/55] pyproject-rpm-macros-0:1.18.6-2 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[45/55] python-rpm-macros-0:3.14-10.fc4 100% |   0.0   B/s |   0.0   B |  00m00s
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[47/55] python3-rpm-macros-0:3.14-10.fc 100% |   0.0   B/s |   0.0   B |  00m00s
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[48/55] cmake-rpm-macros-0:4.2.3-1.fc45 100% |   0.0   B/s |   0.0   B |  00m00s
>>> Already downloaded
[49/55] gtest-devel-0:1.17.0-2.fc44.x86 100% |  15.7 MiB/s | 257.3 KiB |  00m00s
[50/55] pybind11-devel-0:3.0-3.fc44.x86 100% |  11.2 MiB/s | 218.3 KiB |  00m00s
[51/55] gtest-0:1.17.0-2.fc44.x86_64    100% |  47.1 MiB/s | 192.9 KiB |  00m00s
[52/55] xsimd-devel-0:13.2.0-4.fc44.noa 100% |   6.1 MiB/s | 162.5 KiB |  00m00s
[53/55] gmock-0:1.17.0-2.fc44.x86_64    100% |   1.6 MiB/s |  67.5 KiB |  00m00s
[54/55] xtl-devel-0:0.8.1-2.fc44.x86_64 100% |   3.0 KiB/s |  89.7 KiB |  00m30s
>>> Downloading successful, but checksum doesn't match. Calculated: 37742c87fe000d95fe776e2ca88eb81b36363a4b7d9888918c0274d851cc33ae(sha256)  Expected: e22315232d05ddac4558e1963acdf3e5e0bf09b073dde288376d8d304f731595(sha256)  - https://d2lzkl7pfhq30w.cloudfront.net/pub/fedora/linux/development/rawhide/Everything/x86_64/os/Packages/x/xtl-devel-0.8.1-2.fc44.x86_64.rpm
>>> Curl error (28): Timeout was reached for https://na.edge.kernel.org/fedora/development/rawhide/Everything/x86_64/os/Packages/x/xtl-devel-0.8.1-2.fc44.x86_64.rpm [Connection timed out after 30000 milliseconds] - https://na.edge.kernel.org/fedora/development/rawhide/Everything/x86_64/os/Packages/x/xtl-devel-0.8.1-2.fc44.x86_64.rpm
[55/55] xtensor-devel-0:0.27.0-2.fc44.x 100% |   7.4 KiB/s | 225.7 KiB |  00m30s
>>> Downloading successful, but checksum doesn't match. Calculated: f2dba2c158b63e3f7cde30a4c788c20a0168d1c5c306bd83b4df32b113da3c5a(sha256)  Expected: c47df80aa2cbfceaf82bf5aabe2a4f63d2948a0af6ebf8cf65f5757ccf626b6d(sha256)  - https://d2lzkl7pfhq30w.cloudfront.net/pub/fedora/linux/development/rawhide/Everything/x86_64/os/Packages/x/xtensor-devel-0.27.0-2.fc44.x86_64.rpm
>>> Curl error (28): Timeout was reached for https://na.edge.kernel.org/fedora/development/rawhide/Everything/x86_64/os/Packages/x/xtensor-devel-0.27.0-2.fc44.x86_64.rpm [Connection timed out after 30000 milliseconds] - https://na.edge.kernel.org/fedora/development/rawhide/Everything/x86_64/os/Packages/x/xtensor-devel-0.27.0-2.fc44.x86_64.rpm
--------------------------------------------------------------------------------
[55/55] Total                           100% |  39.8 KiB/s |   1.2 MiB |  00m30s
Running transaction
[ 1/57] Verify package files            100% | 121.0   B/s |  55.0   B |  00m00s
[ 2/57] Prepare transaction             100% | 763.0   B/s |  55.0   B |  00m00s
[ 3/57] Installing cmake-filesystem-0:4 100% |   4.4 MiB/s |   9.1 KiB |  00m00s
[ 4/57] Installing python-rpm-macros-0: 100% |   0.0   B/s |  28.5 KiB |  00m00s
[ 5/57] Installing libmpc-0:1.3.1-9.fc4 100% | 158.2 MiB/s | 162.0 KiB |  00m00s
[ 6/57] Installing python3-rpm-macros-0 100% |   0.0   B/s |   6.8 KiB |  00m00s
[ 7/57] Installing libgfortran-0:16.0.1 100% | 487.2 MiB/s |   3.4 MiB |  00m00s
[ 8/57] Installing gtest-0:1.17.0-2.fc4 100% | 251.4 MiB/s | 514.9 KiB |  00m00s
[ 9/57] Installing expat-0:2.7.3-2.fc44 100% |  26.0 MiB/s | 318.9 KiB |  00m00s
[10/57] Installing make-1:4.4.1-12.fc44 100% | 112.5 MiB/s |   1.8 MiB |  00m00s
[11/57] Installing gmock-0:1.17.0-2.fc4 100% | 140.8 MiB/s | 144.2 KiB |  00m00s
[12/57] Installing pyproject-rpm-macros 100% | 114.8 MiB/s | 117.5 KiB |  00m00s
[13/57] Installing cpp-0:16.0.1-0.7.fc4 100% | 383.3 MiB/s |  42.2 MiB |  00m00s
[14/57] Installing xsimd-devel-0:13.2.0 100% | 357.1 MiB/s |   1.4 MiB |  00m00s
[15/57] Installing xtl-devel-0:0.8.1-2. 100% | 315.9 MiB/s | 647.0 KiB |  00m00s
[16/57] Installing annobin-docs-0:13.05 100% |  49.0 MiB/s | 100.3 KiB |  00m00s
[17/57] Installing kernel-headers-0:6.1 100% | 242.4 MiB/s |   7.0 MiB |  00m00s
[18/57] Installing glibc-devel-0:2.43.9 100% | 216.9 MiB/s |   2.4 MiB |  00m00s
[19/57] Installing libxcrypt-devel-0:4. 100% |   0.0   B/s |  33.3 KiB |  00m00s
[20/57] Installing libatomic-0:16.0.1-0 100% |  45.5 MiB/s |  46.6 KiB |  00m00s
[21/57] Installing gcc-0:16.0.1-0.7.fc4 100% | 447.6 MiB/s | 120.8 MiB |  00m00s
[22/57] Installing libstdc++-devel-0:16 100% | 525.5 MiB/s |  38.9 MiB |  00m00s
[23/57] Installing openblas-0:0.3.29-2. 100% | 110.8 MiB/s | 113.5 KiB |  00m00s
[24/57] Installing openblas-openmp-0:0. 100% | 661.9 MiB/s |  43.7 MiB |  00m00s
[25/57] Installing tzdata-0:2025c-2.fc4 100% |  54.0 MiB/s |   1.5 MiB |  00m00s
[26/57] Installing python-pip-wheel-0:2 100% | 602.0 MiB/s |   1.2 MiB |  00m00s
[27/57] Installing mpdecimal-0:4.0.1-3. 100% |  42.7 MiB/s | 218.6 KiB |  00m00s
[28/57] Installing python3-libs-0:3.14. 100% | 387.1 MiB/s |  44.1 MiB |  00m00s
[29/57] Installing python3-0:3.14.3-1.f 100% |   2.5 MiB/s |  30.5 KiB |  00m00s
[30/57] Installing python3-packaging-0: 100% | 201.8 MiB/s | 619.9 KiB |  00m00s
[31/57] Installing cmake-rpm-macros-0:4 100% |   0.0   B/s |   9.0 KiB |  00m00s
[32/57] Installing python3-rpm-generato 100% |   0.0   B/s |  82.9 KiB |  00m00s
[33/57] Installing python3-iniconfig-0: 100% |  52.9 MiB/s |  54.1 KiB |  00m00s
[34/57] Installing python3-pluggy-0:1.6 100% |  70.9 MiB/s | 217.9 KiB |  00m00s
[35/57] Installing python3-pygments-0:2 100% | 255.3 MiB/s |  11.5 MiB |  00m00s
[36/57] Installing vim-filesystem-2:9.1 100% |   4.6 MiB/s |   4.7 KiB |  00m00s
[37/57] Installing emacs-filesystem-1:3 100% |   0.0   B/s | 812.0   B |  00m00s
[38/57] Installing libquadmath-0:16.0.1 100% | 319.5 MiB/s | 327.2 KiB |  00m00s
[39/57] Installing flexiblas-netlib-0:3 100% | 371.1 MiB/s |  16.3 MiB |  00m00s
[40/57] Installing flexiblas-0:3.5.0-2. 100% |   0.0   B/s |  39.2 KiB |  00m00s
[41/57] Installing flexiblas-openblas-o 100% |  13.0 MiB/s |  39.9 KiB |  00m00s
[42/57] Installing python3-numpy-1:2.4. 100% | 385.4 MiB/s |  41.6 MiB |  00m00s
[43/57] Installing python3-numpy-f2py-1 100% | 108.9 MiB/s |   2.2 MiB |  00m00s
[44/57] Installing rhash-0:1.4.5-4.fc44 100% |  29.3 MiB/s | 360.1 KiB |  00m00s
[45/57] Installing libuv-1:1.51.0-3.fc4 100% | 285.9 MiB/s | 585.6 KiB |  00m00s
[46/57] Installing jsoncpp-0:1.9.6-3.fc 100% | 280.4 MiB/s | 287.1 KiB |  00m00s
[47/57] Installing cmake-0:4.2.3-1.fc45 100% | 365.0 MiB/s |  39.1 MiB |  00m00s
[48/57] Installing cmake-data-0:4.2.3-1 100% | 134.5 MiB/s |  10.0 MiB |  00m00s
[49/57] Installing python3-pytest-0:8.4 100% | 412.3 MiB/s |  22.7 MiB |  00m00s
[50/57] Installing python3-devel-0:3.14 100% |  95.2 MiB/s |   2.0 MiB |  00m00s
[51/57] Installing python3-setuptools-0 100% | 273.3 MiB/s |   7.7 MiB |  00m00s
[52/57] Installing pybind11-devel-0:3.0 100% |  71.6 MiB/s |   1.0 MiB |  00m00s
[53/57] Installing gcc-c++-0:16.0.1-0.7 100% | 399.1 MiB/s |  46.3 MiB |  00m00s
[54/57] Installing annobin-plugin-gcc-0 100% |  56.8 MiB/s | 697.4 KiB |  00m00s
[55/57] Installing gcc-plugin-annobin-0 100% |   5.2 MiB/s |  58.8 KiB |  00m00s
[56/57] Installing xtensor-devel-0:0.27 100% | 379.7 MiB/s |   1.9 MiB |  00m00s
[57/57] Installing gtest-devel-0:1.17.0 100% |  10.1 MiB/s |   1.1 MiB |  00m00s
Complete!
Building target platforms: x86_64
Building for target x86_64
setting SOURCE_DATE_EPOCH=1768608000
Wrote: /builddir/build/SRPMS/xtensor-python-0.28.0-2.fc45.src.rpm
Updating and loading repositories:
 Copr repository                        100% |   3.1 KiB/s |   1.5 KiB |  00m00s
 fedora                                 100% |  46.4 KiB/s |  25.9 KiB |  00m01s
Repositories loaded.
Nothing to do.
Package "cmake-4.2.3-1.fc45.x86_64" is already installed.
Package "gcc-c++-16.0.1-0.7.fc45.x86_64" is already installed.
Package "gtest-devel-1.17.0-2.fc44.x86_64" is already installed.
Package "make-1:4.4.1-12.fc44.x86_64" is already installed.
Package "pybind11-devel-3.0-3.fc44.x86_64" is already installed.
Package "python3-devel-3.14.3-1.fc45.x86_64" is already installed.
Package "python3-numpy-1:2.4.2-1.fc44.x86_64" is already installed.
Package "python3-pytest-8.4.2-2.fc44.noarch" is already installed.
Package "python3-setuptools-80.10.2-1.fc44.noarch" is already installed.
Package "xtensor-devel-0.27.0-2.fc44.x86_64" is already installed.

Finish: build setup for xtensor-python-0.28.0-2.fc45.src.rpm
Start: rpmbuild xtensor-python-0.28.0-2.fc45.src.rpm
Building target platforms: x86_64
Building for target x86_64
setting SOURCE_DATE_EPOCH=1768608000
Executing(%mkbuilddir): /bin/sh -e /var/tmp/rpm-tmp.VYhT3N
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.zsCrIe
+ umask 022
+ cd /builddir/build/BUILD/xtensor-python-0.28.0-build
+ cd /builddir/build/BUILD/xtensor-python-0.28.0-build
+ rm -rf xtensor-python-0.28.0
+ /usr/lib/rpm/rpmuncompress -x /builddir/build/SOURCES/xtensor-python-0.28.0.tar.gz
+ STATUS=0
+ '[' 0 -ne 0 ']'
+ cd xtensor-python-0.28.0
+ /usr/bin/chmod -Rf a+rX,u+w,g-w,o-w .
+ /usr/lib/rpm/rpmuncompress /builddir/build/SOURCES/324.diff
+ /usr/bin/patch -p1 -s --fuzz=0 --no-backup-if-mismatch -f
+ /usr/lib/rpm/rpmuncompress /builddir/build/SOURCES/326.diff
+ /usr/bin/patch -p1 -s --fuzz=0 --no-backup-if-mismatch -f
+ /usr/lib/rpm/rpmuncompress /builddir/build/SOURCES/325.diff
+ /usr/bin/patch -p1 -s --fuzz=0 --no-backup-if-mismatch -f
+ /usr/lib/rpm/rpmuncompress /builddir/build/SOURCES/327.diff
+ /usr/bin/patch -p1 -s --fuzz=0 --no-backup-if-mismatch -f
+ RPM_EC=0
++ jobs -p
+ exit 0
Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.it9o8i
+ umask 022
+ cd /builddir/build/BUILD/xtensor-python-0.28.0-build
+ CFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer  '
+ export CFLAGS
+ CXXFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer  '
+ export CXXFLAGS
+ FFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -I/usr/lib64/gfortran/modules  '
+ export FFLAGS
+ FCFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -I/usr/lib64/gfortran/modules  '
+ export FCFLAGS
+ VALAFLAGS=-g
+ export VALAFLAGS
+ RUSTFLAGS='-Copt-level=3 -Cdebuginfo=2 -Ccodegen-units=1 -Cstrip=none -Cforce-frame-pointers=yes -Clink-arg=-specs=/usr/lib/rpm/redhat/redhat-package-notes --cap-lints=warn'
+ export RUSTFLAGS
+ LDFLAGS='-Wl,-z,relro -Wl,--as-needed  -Wl,-z,pack-relative-relocs -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-hardened-ld-errors -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -Wl,--build-id=sha1 -specs=/usr/lib/rpm/redhat/redhat-package-notes  '
+ export LDFLAGS
+ LT_SYS_LIBRARY_PATH=/usr/lib64:
+ export LT_SYS_LIBRARY_PATH
+ CC=gcc
+ export CC
+ CXX=g++
+ export CXX
+ cd xtensor-python-0.28.0
+ CFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer  '
+ export CFLAGS
+ CXXFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer  '
+ export CXXFLAGS
+ FFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -I/usr/lib64/gfortran/modules  '
+ export FFLAGS
+ FCFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -I/usr/lib64/gfortran/modules  '
+ export FCFLAGS
+ VALAFLAGS=-g
+ export VALAFLAGS
+ RUSTFLAGS='-Copt-level=3 -Cdebuginfo=2 -Ccodegen-units=1 -Cstrip=none -Cforce-frame-pointers=yes -Clink-arg=-specs=/usr/lib/rpm/redhat/redhat-package-notes --cap-lints=warn'
+ export RUSTFLAGS
+ LDFLAGS='-Wl,-z,relro -Wl,--as-needed  -Wl,-z,pack-relative-relocs -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-hardened-ld-errors -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -Wl,--build-id=sha1 -specs=/usr/lib/rpm/redhat/redhat-package-notes  '
+ export LDFLAGS
+ LT_SYS_LIBRARY_PATH=/usr/lib64:
+ export LT_SYS_LIBRARY_PATH
+ CC=gcc
+ export CC
+ CXX=g++
+ export CXX
+ /usr/bin/cmake -S . -B redhat-linux-build -DCMAKE_C_FLAGS_RELEASE:STRING=-DNDEBUG -DCMAKE_CXX_FLAGS_RELEASE:STRING=-DNDEBUG -DCMAKE_Fortran_FLAGS_RELEASE:STRING=-DNDEBUG -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON -DCMAKE_INSTALL_DO_STRIP:BOOL=OFF -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_INSTALL_FULL_SBINDIR:PATH=/usr/bin -DCMAKE_INSTALL_SBINDIR:PATH=bin -DINCLUDE_INSTALL_DIR:PATH=/usr/include -DLIB_INSTALL_DIR:PATH=/usr/lib64 -DSYSCONF_INSTALL_DIR:PATH=/etc -DSHARE_INSTALL_PREFIX:PATH=/usr/share -DLIB_SUFFIX=64 -DBUILD_SHARED_LIBS:BOOL=ON -DBUILD_TESTS=ON
-- The C compiler identification is GNU 16.0.1
-- The CXX compiler identification is GNU 16.0.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- xtensor-python v0.28.0
-- Performing Test arch_native_supported
-- Performing Test arch_native_supported - Success
-- Found xtensor: /usr/include/xtensor
-- Found Python: /usr/bin/python3.14 (found version "3.14.3") found components: Interpreter
-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.14.3", minimum required is "3.8")
-- Found PythonLibs: /usr/lib64/libpython3.14.so
-- Performing Test HAS_FLTO
-- Performing Test HAS_FLTO - Success
-- Found pybind11: /usr/include (found version "3.0.0")
-- Found pybind11: /usr/include;/usr/include/python3.14/pybind11
-- Found NumPy: version "2.4.2" /usr/lib64/python3.14/site-packages/numpy/_core/include
-- Found numpy: /usr/lib64/python3.14/site-packages/numpy/_core/include
-- Forcing tests build type to Release
-- Found GTest: /usr/lib64/cmake/GTest/GTestConfig.cmake (found version "1.17.0")
-- Found Threads: TRUE
-- Forcing tests build type to Release
-- Performing Test HAS_CPP14_FLAG
-- Performing Test HAS_CPP14_FLAG - Success
-- Performing Test HAS_LTO_FLAG
-- Performing Test HAS_LTO_FLAG - Success
-- Configuring done (1.2s)
-- Generating done (0.0s)
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_C_FLAGS_RELEASE
    CMAKE_Fortran_FLAGS_RELEASE
    CMAKE_INSTALL_DO_STRIP
    INCLUDE_INSTALL_DIR
    LIB_INSTALL_DIR
    LIB_SUFFIX
    SHARE_INSTALL_PREFIX
    SYSCONF_INSTALL_DIR


-- Build files have been written to: /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build
+ /usr/bin/cmake --build redhat-linux-build -j4 --verbose
Change Dir: '/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build'

Run Build Command(s): /usr/bin/cmake -E env VERBOSE=1 /usr/bin/gmake -f Makefile -j4
/usr/bin/cmake -S/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0 -B/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build/CMakeFiles /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build//CMakeFiles/progress.marks
/usr/bin/gmake  -f CMakeFiles/Makefile2 all
gmake[1]: Entering directory '/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build'
/usr/bin/gmake  -f test/CMakeFiles/test_xtensor_python.dir/build.make test/CMakeFiles/test_xtensor_python.dir/depend
gmake[2]: Entering directory '/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build'
cd /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0 /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build/test /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build/test/CMakeFiles/test_xtensor_python.dir/DependInfo.cmake "--color=" test_xtensor_python
gmake[2]: Leaving directory '/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build'
/usr/bin/gmake  -f test/CMakeFiles/test_xtensor_python.dir/build.make test/CMakeFiles/test_xtensor_python.dir/build
gmake[2]: Entering directory '/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build'
[ 14%] Building CXX object test/CMakeFiles/test_xtensor_python.dir/main.cpp.o
[ 28%] Building CXX object test/CMakeFiles/test_xtensor_python.dir/test_pyarray_traits.cpp.o
[ 42%] Building CXX object test/CMakeFiles/test_xtensor_python.dir/test_pytensor.cpp.o
[ 57%] Building CXX object test/CMakeFiles/test_xtensor_python.dir/test_pyarray.cpp.o
cd /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build/test && /usr/bin/g++ -DGTEST_LINKED_AS_SHARED_LIBRARY=1 -I/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include -I/usr/include/python3.14 -I/usr/lib64/python3.14/site-packages/numpy/_core/include -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -std=c++17 -DNDEBUG -MD -MT test/CMakeFiles/test_xtensor_python.dir/main.cpp.o -MF CMakeFiles/test_xtensor_python.dir/main.cpp.o.d -o CMakeFiles/test_xtensor_python.dir/main.cpp.o -c /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/main.cpp
cd /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build/test && /usr/bin/g++ -DGTEST_LINKED_AS_SHARED_LIBRARY=1 -I/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include -I/usr/include/python3.14 -I/usr/lib64/python3.14/site-packages/numpy/_core/include -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -std=c++17 -DNDEBUG -MD -MT test/CMakeFiles/test_xtensor_python.dir/test_pytensor.cpp.o -MF CMakeFiles/test_xtensor_python.dir/test_pytensor.cpp.o.d -o CMakeFiles/test_xtensor_python.dir/test_pytensor.cpp.o -c /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp
cd /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build/test && /usr/bin/g++ -DGTEST_LINKED_AS_SHARED_LIBRARY=1 -I/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include -I/usr/include/python3.14 -I/usr/lib64/python3.14/site-packages/numpy/_core/include -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -std=c++17 -DNDEBUG -MD -MT test/CMakeFiles/test_xtensor_python.dir/test_pyarray_traits.cpp.o -MF CMakeFiles/test_xtensor_python.dir/test_pyarray_traits.cpp.o.d -o CMakeFiles/test_xtensor_python.dir/test_pyarray_traits.cpp.o -c /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray_traits.cpp
cd /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build/test && /usr/bin/g++ -DGTEST_LINKED_AS_SHARED_LIBRARY=1 -I/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include -I/usr/include/python3.14 -I/usr/lib64/python3.14/site-packages/numpy/_core/include -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -std=c++17 -DNDEBUG -MD -MT test/CMakeFiles/test_xtensor_python.dir/test_pyarray.cpp.o -MF CMakeFiles/test_xtensor_python.dir/test_pyarray.cpp.o.d -o CMakeFiles/test_xtensor_python.dir/test_pyarray.cpp.o -c /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp
In file included from /usr/include/xtensor/utils/xtensor_simd.hpp:17,
                 from /usr/include/xtensor/containers/xstorage.hpp:23,
                 from /usr/include/xtensor/containers/xbuffer_adaptor.hpp:21,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:17,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray_traits.cpp:12:
/usr/include/xtensor/utils/xutils.hpp:590:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  590 |     concept has_data_interface_concept = has_data_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:590:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/utils/xtensor_simd.hpp:17,
                 from /usr/include/xtensor/containers/xstorage.hpp:23,
                 from /usr/include/xtensor/containers/xbuffer_adaptor.hpp:21,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:17,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:12:
/usr/include/xtensor/utils/xutils.hpp:590:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  590 |     concept has_data_interface_concept = has_data_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:590:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:613:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  613 |     concept has_iterator_interface_concept = has_iterator_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:613:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:613:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  613 |     concept has_iterator_interface_concept = has_iterator_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:613:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:634:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  634 |     concept iterator_concept = is_iterator<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:634:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:634:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  634 |     concept iterator_concept = is_iterator<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:634:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:823:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  823 |     concept with_memory_address_concept = has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:823:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:823:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  823 |     concept with_memory_address_concept = has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:823:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:825:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  825 |     concept without_memory_address_concept = !has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:825:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:825:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  825 |     concept without_memory_address_concept = !has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:825:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/utils/xtensor_simd.hpp:17,
                 from /usr/include/xtensor/containers/xstorage.hpp:23,
                 from /usr/include/xtensor/containers/xbuffer_adaptor.hpp:21,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:17,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:12:
/usr/include/xtensor/utils/xutils.hpp:590:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  590 |     concept has_data_interface_concept = has_data_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:590:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  273 |     concept has_simd_interface_concept = has_simd_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  273 |     concept has_simd_interface_concept = has_simd_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:613:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  613 |     concept has_iterator_interface_concept = has_iterator_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:613:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/containers/xstorage.hpp:59:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
   59 |         template <std::input_iterator InputIt>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:60:24: error: expected ‘)’ before ‘first’ [-Wtemplate-body]
   60 |         uvector(InputIt first, InputIt last, const allocator_type& alloc = allocator_type());
      |                ~       ^~~~~~
      |                        )
/usr/include/xtensor/utils/xutils.hpp:634:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  634 |     concept iterator_concept = is_iterator<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/containers/xstorage.hpp:59:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
   59 |         template <std::input_iterator InputIt>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:60:24: error: expected ‘)’ before ‘first’ [-Wtemplate-body]
   60 |         uvector(InputIt first, InputIt last, const allocator_type& alloc = allocator_type());
      |                ~       ^~~~~~
      |                        )
/usr/include/xtensor/utils/xutils.hpp:634:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/containers/xstorage.hpp:272:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  272 |     template <std::input_iterator InputIt>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:273:12: error: ‘int xt::uvector<T, A>::uvector’ is not a static data member of ‘class xt::uvector<T, A>’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: default argument for template parameter for class enclosing ‘xt::uvector<T, A>::uvector’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                   ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: template definition of non-template ‘int xt::uvector<T, A>::uvector’ [-Wtemplate-body]
/usr/include/xtensor/utils/xutils.hpp:823:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  823 |     concept with_memory_address_concept = has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:823:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/containers/xstorage.hpp:272:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  272 |     template <std::input_iterator InputIt>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:273:12: error: ‘int xt::uvector<T, A>::uvector’ is not a static data member of ‘class xt::uvector<T, A>’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: default argument for template parameter for class enclosing ‘xt::uvector<T, A>::uvector’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                   ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: template definition of non-template ‘int xt::uvector<T, A>::uvector’ [-Wtemplate-body]
/usr/include/xtensor/utils/xutils.hpp:825:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  825 |     concept without_memory_address_concept = !has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:825:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  273 |     concept has_simd_interface_concept = has_simd_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:59:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
   59 |         template <std::input_iterator InputIt>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:60:24: error: expected ‘)’ before ‘first’ [-Wtemplate-body]
   60 |         uvector(InputIt first, InputIt last, const allocator_type& alloc = allocator_type());
      |                ~       ^~~~~~
      |                        )
/usr/include/xtensor/containers/xstorage.hpp:272:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  272 |     template <std::input_iterator InputIt>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:273:12: error: ‘int xt::uvector<T, A>::uvector’ is not a static data member of ‘class xt::uvector<T, A>’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: default argument for template parameter for class enclosing ‘xt::uvector<T, A>::uvector’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                   ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: template definition of non-template ‘int xt::uvector<T, A>::uvector’ [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:273:50: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                  ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:50: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                  ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:64: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                                ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:64: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                                ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:670:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
  670 |         template <std::input_iterator IT>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:671:19: error: expected ‘)’ before ‘begin’ [-Wtemplate-body]
  671 |         svector(IT begin, IT end, const allocator_type& alloc = allocator_type());
      |                ~  ^~~~~~
      |                   )
/usr/include/xtensor/containers/xstorage.hpp:675:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  675 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:684:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  684 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:670:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
  670 |         template <std::input_iterator IT>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:671:19: error: expected ‘)’ before ‘begin’ [-Wtemplate-body]
  671 |         svector(IT begin, IT end, const allocator_type& alloc = allocator_type());
      |                ~  ^~~~~~
      |                   )
/usr/include/xtensor/containers/xstorage.hpp:806:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  806 |     template <std::input_iterator IT>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:807:12: error: ‘int xt::svector<T, N, A, Init>::svector’ is not a static data member of ‘class xt::svector<T, N, A, Init>’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: default argument for template parameter for class enclosing ‘xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: template definition of non-template ‘int xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:675:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  675 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:684:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  684 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:806:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  806 |     template <std::input_iterator IT>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
      |                                            T
/usr/include/xtensor/containers/xstorage.hpp:807:12: error: ‘int xt::svector<T, N, A, Init>::svector’ is not a static data member of ‘class xt::svector<T, N, A, Init>’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: default argument for template parameter for class enclosing ‘xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
/usr/include/xtensor/containers/xstorage.hpp:273:50: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                  ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: template definition of non-template ‘int xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:273:64: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                                ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:670:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
  670 |         template <std::input_iterator IT>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:807:54: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                      ^~
      |                                                      T
/usr/include/xtensor/containers/xstorage.hpp:807:62: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                              ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:816:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  816 |         requires(N != N2)
      |         ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:671:19: error: expected ‘)’ before ‘begin’ [-Wtemplate-body]
  671 |         svector(IT begin, IT end, const allocator_type& alloc = allocator_type());
      |                ~  ^~~~~~
      |                   )
/usr/include/xtensor/containers/xstorage.hpp:876:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  876 |         requires(N != N2)
      |         ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:675:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  675 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:684:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  684 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
      |                                            T
/usr/include/xtensor/containers/xstorage.hpp:806:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  806 |     template <std::input_iterator IT>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:807:12: error: ‘int xt::svector<T, N, A, Init>::svector’ is not a static data member of ‘class xt::svector<T, N, A, Init>’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: default argument for template parameter for class enclosing ‘xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: template definition of non-template ‘int xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
      |                                            T
/usr/include/xtensor/containers/xstorage.hpp:807:54: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                      ^~
      |                                                      T
/usr/include/xtensor/containers/xstorage.hpp:807:62: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                              ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:816:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  816 |         requires(N != N2)
      |         ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:876:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  876 |         requires(N != N2)
      |         ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:807:54: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                      ^~
      |                                                      T
/usr/include/xtensor/containers/xstorage.hpp:807:62: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                              ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:816:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  816 |         requires(N != N2)
      |         ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:876:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  876 |         requires(N != N2)
      |         ^~~~~~~~
In file included from /usr/include/xtensor/core/xiterator.hpp:26,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:18:
/usr/include/xtensor/core/xshape.hpp:512:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  512 |     concept fixed_shape_container_concept = detail::is_fixed<typename std::decay_t<T>::shape_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/core/xshape.hpp:512:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xiterator.hpp:26,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:18:
/usr/include/xtensor/core/xshape.hpp:512:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  512 |     concept fixed_shape_container_concept = detail::is_fixed<typename std::decay_t<T>::shape_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/core/xshape.hpp:512:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xassign.hpp:21,
                 from /usr/include/xtensor/core/xsemantic.hpp:16,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:19:
/usr/include/xtensor/core/xexpression.hpp:183:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  183 |     concept xexpression_concept = is_xexpression<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/core/xexpression.hpp:183:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xiterator.hpp:26,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:18:
/usr/include/xtensor/core/xshape.hpp:512:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  512 |     concept fixed_shape_container_concept = detail::is_fixed<typename std::decay_t<T>::shape_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/core/xshape.hpp:512:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xassign.hpp:21,
                 from /usr/include/xtensor/core/xsemantic.hpp:16,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:19:
/usr/include/xtensor/core/xexpression.hpp:183:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  183 |     concept xexpression_concept = is_xexpression<E>::value;
      |     ^~~~~~~
      |     const
In file included from /usr/include/xtensor/core/xassign.hpp:21,
                 from /usr/include/xtensor/core/xsemantic.hpp:16,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:19:
/usr/include/xtensor/core/xexpression.hpp:183:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  183 |     concept xexpression_concept = is_xexpression<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/core/xexpression.hpp:183:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/core/xexpression.hpp:183:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xfunction.hpp:24,
                 from /usr/include/xtensor/core/xassign.hpp:22:
/usr/include/xtensor/containers/xscalar.hpp:321:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  321 |     concept xscalar_concept = is_xscalar<std::decay_t<E>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/containers/xscalar.hpp:321:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xfunction.hpp:24,
                 from /usr/include/xtensor/core/xassign.hpp:22:
/usr/include/xtensor/containers/xscalar.hpp:321:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  321 |     concept xscalar_concept = is_xscalar<std::decay_t<E>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/containers/xscalar.hpp:321:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xfunction.hpp:24,
                 from /usr/include/xtensor/core/xassign.hpp:22:
/usr/include/xtensor/containers/xscalar.hpp:321:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  321 |     concept xscalar_concept = is_xscalar<std::decay_t<E>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/containers/xscalar.hpp:321:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/utils/xtensor_simd.hpp:17,
                 from /usr/include/xtensor/containers/xstorage.hpp:23,
                 from /usr/include/xtensor/containers/xbuffer_adaptor.hpp:21,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:17,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/main.cpp:18:
/usr/include/xtensor/utils/xutils.hpp:590:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  590 |     concept has_data_interface_concept = has_data_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:590:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:613:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  613 |     concept has_iterator_interface_concept = has_iterator_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:613:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:634:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  634 |     concept iterator_concept = is_iterator<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:634:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:823:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  823 |     concept with_memory_address_concept = has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:823:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xutils.hpp:825:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  825 |     concept without_memory_address_concept = !has_memory_address<std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xutils.hpp:825:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  273 |     concept has_simd_interface_concept = has_simd_interface<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/utils/xtensor_simd.hpp:273:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/containers/xstorage.hpp:59:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
   59 |         template <std::input_iterator InputIt>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:60:24: error: expected ‘)’ before ‘first’ [-Wtemplate-body]
   60 |         uvector(InputIt first, InputIt last, const allocator_type& alloc = allocator_type());
      |                ~       ^~~~~~
      |                        )
/usr/include/xtensor/containers/xstorage.hpp:272:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  272 |     template <std::input_iterator InputIt>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:273:12: error: ‘int xt::uvector<T, A>::uvector’ is not a static data member of ‘class xt::uvector<T, A>’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: default argument for template parameter for class enclosing ‘xt::uvector<T, A>::uvector’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                   ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: template definition of non-template ‘int xt::uvector<T, A>::uvector’ [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:273:35: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:273:50: error: ‘InputIt’ was not declared in this scope [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                  ^~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:273:64: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  273 |     inline uvector<T, A>::uvector(InputIt first, InputIt last, const allocator_type& alloc)
      |                                                                ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:670:19: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’? [-Wtemplate-body]
  670 |         template <std::input_iterator IT>
      |                   ^~~
/usr/include/xtensor/containers/xstorage.hpp:671:19: error: expected ‘)’ before ‘begin’ [-Wtemplate-body]
  671 |         svector(IT begin, IT end, const allocator_type& alloc = allocator_type());
      |                ~  ^~~~~~
      |                   )
/usr/include/xtensor/containers/xstorage.hpp:675:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  675 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:684:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  684 |             requires(N != N2);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:806:15: error: ‘std::input_iterator’ has not been declared; did you mean ‘std::insert_iterator’?
  806 |     template <std::input_iterator IT>
      |               ^~~
/usr/include/xtensor/containers/xstorage.hpp:807:12: error: ‘int xt::svector<T, N, A, Init>::svector’ is not a static data member of ‘class xt::svector<T, N, A, Init>’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |            ^~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: default argument for template parameter for class enclosing ‘xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: template definition of non-template ‘int xt::svector<T, N, A, Init>::svector’ [-Wtemplate-body]
/usr/include/xtensor/containers/xstorage.hpp:807:44: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                            ^~
      |                                            T
/usr/include/xtensor/containers/xstorage.hpp:807:54: error: ‘IT’ was not declared in this scope; did you mean ‘T’? [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                      ^~
      |                                                      T
/usr/include/xtensor/containers/xstorage.hpp:807:62: error: expected primary-expression before ‘const’ [-Wtemplate-body]
  807 |     inline svector<T, N, A, Init>::svector(IT begin, IT end, const allocator_type& alloc)
      |                                                              ^~~~~
/usr/include/xtensor/containers/xstorage.hpp:816:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  816 |         requires(N != N2)
      |         ^~~~~~~~
/usr/include/xtensor/containers/xstorage.hpp:876:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  876 |         requires(N != N2)
      |         ^~~~~~~~
In file included from /usr/include/xtensor/core/xiterator.hpp:26,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:18:
/usr/include/xtensor/core/xshape.hpp:512:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  512 |     concept fixed_shape_container_concept = detail::is_fixed<typename std::decay_t<T>::shape_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/core/xshape.hpp:512:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xassign.hpp:21,
                 from /usr/include/xtensor/core/xsemantic.hpp:16,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:19:
/usr/include/xtensor/core/xexpression.hpp:183:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  183 |     concept xexpression_concept = is_xexpression<E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/core/xexpression.hpp:183:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/core/xfunction.hpp:24,
                 from /usr/include/xtensor/core/xassign.hpp:22:
/usr/include/xtensor/containers/xscalar.hpp:321:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  321 |     concept xscalar_concept = is_xscalar<std::decay_t<E>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/containers/xscalar.hpp:321:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
In file included from /usr/include/xtensor/views/xstrided_view_base.hpp:23,
                 from /usr/include/xtensor/views/xstrided_view.hpp:28,
                 from /usr/include/xtensor/core/xoperation.hpp:22,
                 from /usr/include/xtensor/core/xmath.hpp:28,
                 from /usr/include/xtensor/containers/xcontainer.hpp:25,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:35,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:22:
/usr/include/xtensor/views/xslice.hpp:112:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:112:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:112:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:113:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:113:26: error: template argument 1 is invalid [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                          ^
/usr/include/xtensor/views/xslice.hpp:117:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:117:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:117:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                                      ^
In file included from /usr/include/xtensor/views/xstrided_view_base.hpp:23,
                 from /usr/include/xtensor/views/xstrided_view.hpp:28,
                 from /usr/include/xtensor/core/xoperation.hpp:22,
                 from /usr/include/xtensor/core/xmath.hpp:28,
                 from /usr/include/xtensor/containers/xcontainer.hpp:25,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:35,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:22:
/usr/include/xtensor/views/xslice.hpp:112:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:112:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:112:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:118:16: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                ^
/usr/include/xtensor/views/xslice.hpp:118:17: error: template argument 1 is invalid [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                 ^
/usr/include/xtensor/views/xslice.hpp:156:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:156:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:156:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                                      ^
In file included from /usr/include/xtensor/views/xstrided_view_base.hpp:23,
                 from /usr/include/xtensor/views/xstrided_view.hpp:28,
                 from /usr/include/xtensor/core/xoperation.hpp:22,
                 from /usr/include/xtensor/core/xmath.hpp:28,
                 from /usr/include/xtensor/containers/xcontainer.hpp:25,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:35,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:22:
/usr/include/xtensor/views/xslice.hpp:112:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:112:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:112:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:113:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:113:26: error: template argument 1 is invalid [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                          ^
/usr/include/xtensor/views/xslice.hpp:157:33: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                 ^
/usr/include/xtensor/views/xslice.hpp:117:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:117:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:117:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:157:34: error: template argument 1 is invalid [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:161:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:161:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:161:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:113:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:113:26: error: template argument 1 is invalid [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                          ^
/usr/include/xtensor/views/xslice.hpp:117:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:162:24: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:162:25: error: template argument 1 is invalid [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:117:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:201:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:117:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:201:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:201:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:118:16: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                ^
/usr/include/xtensor/views/xslice.hpp:118:17: error: template argument 1 is invalid [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                 ^
/usr/include/xtensor/views/xslice.hpp:156:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:156:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:156:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:202:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                       ^
/usr/include/xtensor/views/xslice.hpp:202:24: error: template argument 1 is invalid [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:206:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:206:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:206:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:118:16: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                ^
/usr/include/xtensor/views/xslice.hpp:118:17: error: template argument 1 is invalid [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                 ^
/usr/include/xtensor/views/xslice.hpp:156:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:156:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:157:33: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                 ^
/usr/include/xtensor/views/xslice.hpp:157:34: error: template argument 1 is invalid [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:161:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:161:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:161:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:156:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:207:14: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |              ^
/usr/include/xtensor/views/xslice.hpp:207:15: error: template argument 1 is invalid [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |               ^
/usr/include/xtensor/views/xslice.hpp:162:24: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:271:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:271:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:271:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:162:25: error: template argument 1 is invalid [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:157:33: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                 ^
/usr/include/xtensor/views/xslice.hpp:201:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:201:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:201:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:157:34: error: template argument 1 is invalid [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:161:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:161:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:161:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:202:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                       ^
/usr/include/xtensor/views/xslice.hpp:202:24: error: template argument 1 is invalid [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:206:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:206:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:206:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:162:24: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:162:25: error: template argument 1 is invalid [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:201:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:201:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:201:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:272:27: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                           ^
/usr/include/xtensor/views/xslice.hpp:272:28: error: template argument 1 is invalid [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                            ^
/usr/include/xtensor/views/xslice.hpp:276:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:276:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:276:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:207:14: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |              ^
/usr/include/xtensor/views/xslice.hpp:207:15: error: template argument 1 is invalid [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |               ^
/usr/include/xtensor/views/xslice.hpp:271:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:271:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:202:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                       ^
/usr/include/xtensor/views/xslice.hpp:202:24: error: template argument 1 is invalid [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:206:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:206:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:206:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:271:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:277:18: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                  ^
/usr/include/xtensor/views/xslice.hpp:277:19: error: template argument 1 is invalid [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                   ^
/usr/include/xtensor/views/xslice.hpp:333:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  333 |             requires(!detail::is_xkeep_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:207:14: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |              ^
/usr/include/xtensor/views/xslice.hpp:207:15: error: template argument 1 is invalid [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |               ^
/usr/include/xtensor/views/xslice.hpp:272:27: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                           ^
/usr/include/xtensor/views/xslice.hpp:339:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:272:28: error: template argument 1 is invalid [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                            ^
/usr/include/xtensor/views/xslice.hpp:339:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:339:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:276:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:276:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:276:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:271:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:271:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:271:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:277:18: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                  ^
/usr/include/xtensor/views/xslice.hpp:277:19: error: template argument 1 is invalid [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                   ^
/usr/include/xtensor/views/xslice.hpp:333:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  333 |             requires(!detail::is_xkeep_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:272:27: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                           ^
/usr/include/xtensor/views/xslice.hpp:339:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:339:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:339:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:272:28: error: template argument 1 is invalid [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                            ^
/usr/include/xtensor/views/xslice.hpp:276:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:276:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:276:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:340:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:340:31: error: template argument 1 is invalid [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:344:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:344:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:344:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:340:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:340:31: error: template argument 1 is invalid [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:344:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:344:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:344:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:277:18: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                  ^
/usr/include/xtensor/views/xslice.hpp:277:19: error: template argument 1 is invalid [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                   ^
/usr/include/xtensor/views/xslice.hpp:333:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  333 |             requires(!detail::is_xkeep_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:339:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:339:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:339:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:345:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:345:22: error: template argument 1 is invalid [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:441:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  441 |             requires(!detail::is_xdrop_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:345:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:345:22: error: template argument 1 is invalid [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:441:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  441 |             requires(!detail::is_xdrop_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:447:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:447:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:447:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:447:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:447:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:447:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:340:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:340:31: error: template argument 1 is invalid [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:344:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:344:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:344:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:448:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:448:31: error: template argument 1 is invalid [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:452:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:452:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:452:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:448:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:448:31: error: template argument 1 is invalid [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:452:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:452:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:452:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:345:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:345:22: error: template argument 1 is invalid [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:441:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  441 |             requires(!detail::is_xdrop_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:447:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:447:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:447:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:453:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:453:22: error: template argument 1 is invalid [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:997:15: error: ‘std::convertible_to’ has not been declared
  997 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:997:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:997:34: error: expected ‘>’ before ‘<’ token
  997 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:453:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:453:22: error: template argument 1 is invalid [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:448:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:448:31: error: template argument 1 is invalid [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:452:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:452:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:452:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:997:15: error: ‘std::convertible_to’ has not been declared
  997 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:997:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:997:34: error: expected ‘>’ before ‘<’ token
  997 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:998:39: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                       ^
/usr/include/xtensor/views/xslice.hpp:998:40: error: template argument 1 is invalid [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                        ^
/usr/include/xtensor/views/xslice.hpp:1007:15: error: ‘std::convertible_to’ has not been declared
 1007 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1007:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1007:34: error: expected ‘>’ before ‘<’ token
 1007 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:453:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:453:22: error: template argument 1 is invalid [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:1008:19: error: ‘S’ was not declared in this scope
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                   ^
/usr/include/xtensor/views/xslice.hpp:1008:20: error: template argument 1 is invalid
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                    ^
/usr/include/xtensor/views/xslice.hpp:997:15: error: ‘std::convertible_to’ has not been declared
  997 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:997:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:998:39: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                       ^
/usr/include/xtensor/views/xslice.hpp:998:40: error: template argument 1 is invalid [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                        ^
/usr/include/xtensor/views/xslice.hpp:1007:15: error: ‘std::convertible_to’ has not been declared
 1007 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1007:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1007:34: error: expected ‘>’ before ‘<’ token
 1007 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:997:34: error: expected ‘>’ before ‘<’ token
  997 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xrange<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1010:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                       ^
/usr/include/xtensor/views/xslice.hpp:1010:24: error: template argument 1 is invalid [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                        ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1076:15: error: ‘std::convertible_to’ has not been declared
 1076 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1076:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1076:34: error: expected ‘>’ before ‘<’ token
 1076 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1008:19: error: ‘S’ was not declared in this scope
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                   ^
/usr/include/xtensor/views/xslice.hpp:1008:20: error: template argument 1 is invalid
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                    ^
/usr/include/xtensor/views/xslice.hpp:998:39: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                       ^
/usr/include/xtensor/views/xslice.hpp:998:40: error: template argument 1 is invalid [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                        ^
/usr/include/xtensor/views/xslice.hpp:1007:15: error: ‘std::convertible_to’ has not been declared
 1007 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1007:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1007:34: error: expected ‘>’ before ‘<’ token
 1007 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1008:19: error: ‘S’ was not declared in this scope
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                   ^
/usr/include/xtensor/views/xslice.hpp:1008:20: error: template argument 1 is invalid
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                    ^
/usr/include/xtensor/views/xslice.hpp:1077:55: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                       ^
/usr/include/xtensor/views/xslice.hpp:1077:56: error: template argument 1 is invalid [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                        ^
/usr/include/xtensor/views/xslice.hpp:1087:15: error: ‘std::convertible_to’ has not been declared
 1087 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1087:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1087:34: error: expected ‘>’ before ‘<’ token
 1087 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xrange<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1010:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                       ^
/usr/include/xtensor/views/xslice.hpp:1010:24: error: template argument 1 is invalid [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1088:27: error: ‘S’ was not declared in this scope
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                           ^
/usr/include/xtensor/views/xslice.hpp:1088:28: error: template argument 1 is invalid
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                            ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xrange<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1010:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                       ^
/usr/include/xtensor/views/xslice.hpp:1010:24: error: template argument 1 is invalid [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                        ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1076:15: error: ‘std::convertible_to’ has not been declared
 1076 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1076:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1076:34: error: expected ‘>’ before ‘<’ token
 1076 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1076:15: error: ‘std::convertible_to’ has not been declared
 1076 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1076:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1076:34: error: expected ‘>’ before ‘<’ token
 1076 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xstepped_range<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1090:31: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                               ^
/usr/include/xtensor/views/xslice.hpp:1090:32: error: template argument 1 is invalid [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                                ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1152:15: error: ‘std::convertible_to’ has not been declared
 1152 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1152:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1152:34: error: expected ‘>’ before ‘<’ token
 1152 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1077:55: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                       ^
/usr/include/xtensor/views/xslice.hpp:1077:56: error: template argument 1 is invalid [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                        ^
/usr/include/xtensor/views/xslice.hpp:1087:15: error: ‘std::convertible_to’ has not been declared
 1087 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1087:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1087:34: error: expected ‘>’ before ‘<’ token
 1087 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1077:55: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                       ^
/usr/include/xtensor/views/xslice.hpp:1077:56: error: template argument 1 is invalid [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                        ^
/usr/include/xtensor/views/xslice.hpp:1087:15: error: ‘std::convertible_to’ has not been declared
 1087 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1087:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1087:34: error: expected ‘>’ before ‘<’ token
 1087 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1088:27: error: ‘S’ was not declared in this scope
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                           ^
/usr/include/xtensor/views/xslice.hpp:1088:28: error: template argument 1 is invalid
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1153:35: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                   ^
/usr/include/xtensor/views/xslice.hpp:1153:36: error: template argument 1 is invalid [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                    ^
/usr/include/xtensor/views/xslice.hpp:1159:15: error: ‘std::convertible_to’ has not been declared
 1159 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1159:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1159:34: error: expected ‘>’ before ‘<’ token
 1159 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1088:27: error: ‘S’ was not declared in this scope
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                           ^
/usr/include/xtensor/views/xslice.hpp:1088:28: error: template argument 1 is invalid
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1160:17: error: ‘S’ was not declared in this scope
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                 ^
/usr/include/xtensor/views/xslice.hpp:1160:18: error: template argument 1 is invalid
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xstepped_range<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1090:31: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                               ^
/usr/include/xtensor/views/xslice.hpp:1090:32: error: template argument 1 is invalid [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                                ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1152:15: error: ‘std::convertible_to’ has not been declared
 1152 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1152:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1152:34: error: expected ‘>’ before ‘<’ token
 1152 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xall<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1162:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1162:22: error: template argument 1 is invalid [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                      ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1218:15: error: ‘std::convertible_to’ has not been declared
 1218 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1218:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1218:34: error: expected ‘>’ before ‘<’ token
 1218 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xstepped_range<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1090:31: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                               ^
/usr/include/xtensor/views/xslice.hpp:1090:32: error: template argument 1 is invalid [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                                ^
/usr/include/xtensor/views/xslice.hpp:1153:35: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                   ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1152:15: error: ‘std::convertible_to’ has not been declared
 1152 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1152:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1152:34: error: expected ‘>’ before ‘<’ token
 1152 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1153:36: error: template argument 1 is invalid [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                    ^
/usr/include/xtensor/views/xslice.hpp:1159:15: error: ‘std::convertible_to’ has not been declared
 1159 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1159:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1159:34: error: expected ‘>’ before ‘<’ token
 1159 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1219:43: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                           ^
/usr/include/xtensor/views/xslice.hpp:1160:17: error: ‘S’ was not declared in this scope
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                 ^
/usr/include/xtensor/views/xslice.hpp:1219:44: error: template argument 1 is invalid [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                            ^
/usr/include/xtensor/views/xslice.hpp:1225:15: error: ‘std::convertible_to’ has not been declared
 1225 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1225:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1225:34: error: expected ‘>’ before ‘<’ token
 1225 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1160:18: error: template argument 1 is invalid
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                  ^
/usr/include/xtensor/views/xslice.hpp:1226:21: error: ‘S’ was not declared in this scope
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1226:22: error: template argument 1 is invalid
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                      ^
/usr/include/xtensor/views/xslice.hpp:1153:35: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                   ^
/usr/include/xtensor/views/xslice.hpp:1153:36: error: template argument 1 is invalid [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                    ^
/usr/include/xtensor/views/xslice.hpp:1159:15: error: ‘std::convertible_to’ has not been declared
 1159 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1159:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1159:34: error: expected ‘>’ before ‘<’ token
 1159 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xall<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1162:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1162:22: error: template argument 1 is invalid [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                      ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1218:15: error: ‘std::convertible_to’ has not been declared
 1218 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1218:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1218:34: error: expected ‘>’ before ‘<’ token
 1218 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xnewaxis<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1228:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                         ^
/usr/include/xtensor/views/xslice.hpp:1228:26: error: template argument 1 is invalid [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                          ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1286:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1286 |         requires(!detail::is_xkeep_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1314:15: error: ‘std::convertible_to’ has not been declared
 1314 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1160:17: error: ‘S’ was not declared in this scope
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                 ^
/usr/include/xtensor/views/xslice.hpp:1160:18: error: template argument 1 is invalid
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                  ^
/usr/include/xtensor/views/xslice.hpp:1314:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1314:34: error: expected ‘>’ before ‘<’ token
 1314 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1219:43: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                           ^
/usr/include/xtensor/views/xslice.hpp:1219:44: error: template argument 1 is invalid [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                            ^
/usr/include/xtensor/views/xslice.hpp:1225:15: error: ‘std::convertible_to’ has not been declared
 1225 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1225:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1225:34: error: expected ‘>’ before ‘<’ token
 1225 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1315:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1315:50: error: template argument 1 is invalid [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1226:21: error: ‘S’ was not declared in this scope
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1344:15: error: ‘std::convertible_to’ has not been declared
 1344 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1344:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1344:34: error: expected ‘>’ before ‘<’ token
 1344 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1226:22: error: template argument 1 is invalid
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                      ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xall<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1162:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1162:22: error: template argument 1 is invalid [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                      ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1218:15: error: ‘std::convertible_to’ has not been declared
 1218 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1218:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1218:34: error: expected ‘>’ before ‘<’ token
 1218 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1345:24: error: ‘S’ was not declared in this scope
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1345:25: error: template argument 1 is invalid
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                         ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xnewaxis<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1228:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                         ^
/usr/include/xtensor/views/xslice.hpp:1228:26: error: template argument 1 is invalid [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                          ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1286:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1286 |         requires(!detail::is_xkeep_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1314:15: error: ‘std::convertible_to’ has not been declared
 1314 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1314:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1314:34: error: expected ‘>’ before ‘<’ token
 1314 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1219:43: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                           ^
/usr/include/xtensor/views/xslice.hpp:1219:44: error: template argument 1 is invalid [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                            ^
/usr/include/xtensor/views/xslice.hpp:1225:15: error: ‘std::convertible_to’ has not been declared
 1225 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1225:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1225:34: error: expected ‘>’ before ‘<’ token
 1225 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xkeep_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1347:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1347:29: error: template argument 1 is invalid [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1430:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1430 |         requires(!detail::is_xdrop_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1458:15: error: ‘std::convertible_to’ has not been declared
 1458 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1458:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1458:34: error: expected ‘>’ before ‘<’ token
 1458 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1315:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1226:21: error: ‘S’ was not declared in this scope
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1315:50: error: template argument 1 is invalid [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1344:15: error: ‘std::convertible_to’ has not been declared
 1344 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1226:22: error: template argument 1 is invalid
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                      ^
/usr/include/xtensor/views/xslice.hpp:1344:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1344:34: error: expected ‘>’ before ‘<’ token
 1344 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1459:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1459:50: error: template argument 1 is invalid [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1496:15: error: ‘std::convertible_to’ has not been declared
 1496 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1496:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1496:34: error: expected ‘>’ before ‘<’ token
 1496 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1345:24: error: ‘S’ was not declared in this scope
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1345:25: error: template argument 1 is invalid
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                         ^
/usr/include/xtensor/views/xslice.hpp:1497:24: error: ‘S’ was not declared in this scope
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1497:25: error: template argument 1 is invalid
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                         ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xnewaxis<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1228:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                         ^
/usr/include/xtensor/views/xslice.hpp:1228:26: error: template argument 1 is invalid [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                          ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1286:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1286 |         requires(!detail::is_xkeep_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1314:15: error: ‘std::convertible_to’ has not been declared
 1314 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1314:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1314:34: error: expected ‘>’ before ‘<’ token
 1314 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xkeep_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1347:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1347:29: error: template argument 1 is invalid [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1430:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1430 |         requires(!detail::is_xdrop_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1458:15: error: ‘std::convertible_to’ has not been declared
 1458 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1458:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1458:34: error: expected ‘>’ before ‘<’ token
 1458 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xdrop_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1499:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1499:29: error: template argument 1 is invalid [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xstrided_view_base.hpp: At global scope:
/usr/include/xtensor/views/xstrided_view_base.hpp:178:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  178 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:180:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  180 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:586:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  586 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:597:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  597 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1315:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1315:50: error: template argument 1 is invalid [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1459:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1459:50: error: template argument 1 is invalid [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1496:15: error: ‘std::convertible_to’ has not been declared
 1496 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1496:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1496:34: error: expected ‘>’ before ‘<’ token
 1496 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1344:15: error: ‘std::convertible_to’ has not been declared
 1344 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1344:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1344:34: error: expected ‘>’ before ‘<’ token
 1344 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xstrided_view.hpp:262:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  262 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:266:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  266 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1497:24: error: ‘S’ was not declared in this scope
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1497:25: error: template argument 1 is invalid
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                         ^
/usr/include/xtensor/views/xstrided_view.hpp:676:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  676 |         requires provides_simd_interface
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:685:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  685 |         requires provides_simd_interface
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1345:24: error: ‘S’ was not declared in this scope
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1345:25: error: template argument 1 is invalid
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                         ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xdrop_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1499:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1499:29: error: template argument 1 is invalid [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xstrided_view_base.hpp: At global scope:
/usr/include/xtensor/views/xstrided_view_base.hpp:178:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  178 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:180:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  180 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xkeep_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1347:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1347:29: error: template argument 1 is invalid [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1430:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1430 |         requires(!detail::is_xdrop_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:586:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  586 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1458:15: error: ‘std::convertible_to’ has not been declared
 1458 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1458:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1458:34: error: expected ‘>’ before ‘<’ token
 1458 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xstrided_view_base.hpp:597:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  597 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:262:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  262 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:266:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  266 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:676:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  676 |         requires provides_simd_interface
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:685:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  685 |         requires provides_simd_interface
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1459:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1459:50: error: template argument 1 is invalid [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1496:15: error: ‘std::convertible_to’ has not been declared
 1496 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1496:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1496:34: error: expected ‘>’ before ‘<’ token
 1496 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1497:24: error: ‘S’ was not declared in this scope
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1497:25: error: template argument 1 is invalid
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                         ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xdrop_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1499:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1499:29: error: template argument 1 is invalid [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xstrided_view_base.hpp: At global scope:
/usr/include/xtensor/views/xstrided_view_base.hpp:178:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  178 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:180:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  180 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:586:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  586 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:597:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  597 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:262:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  262 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:266:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  266 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:676:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  676 |         requires provides_simd_interface
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:685:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  685 |         requires provides_simd_interface
      |         ^~~~~~~~
In file included from /usr/include/xtensor/views/xstrided_view_base.hpp:23,
                 from /usr/include/xtensor/views/xstrided_view.hpp:28,
                 from /usr/include/xtensor/core/xoperation.hpp:22,
                 from /usr/include/xtensor/core/xmath.hpp:28,
                 from /usr/include/xtensor/containers/xcontainer.hpp:25,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:35,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:22:
/usr/include/xtensor/views/xslice.hpp:112:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:112:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:112:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  112 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:113:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:113:26: error: template argument 1 is invalid [-Wtemplate-body]
  113 |         operator xrange<S>() const noexcept;
      |                          ^
/usr/include/xtensor/views/xslice.hpp:117:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:117:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:117:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  117 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:118:16: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                ^
/usr/include/xtensor/views/xslice.hpp:118:17: error: template argument 1 is invalid [-Wtemplate-body]
  118 |         xrange<S> convert() const noexcept;
      |                 ^
/usr/include/xtensor/views/xslice.hpp:156:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:156:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:156:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  156 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:157:33: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                 ^
/usr/include/xtensor/views/xslice.hpp:157:34: error: template argument 1 is invalid [-Wtemplate-body]
  157 |         operator xstepped_range<S>() const noexcept;
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:161:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:161:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:161:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  161 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:162:24: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:162:25: error: template argument 1 is invalid [-Wtemplate-body]
  162 |         xstepped_range<S> convert() const noexcept;
      |                         ^
/usr/include/xtensor/views/xslice.hpp:201:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:201:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:201:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  201 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:202:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                       ^
/usr/include/xtensor/views/xslice.hpp:202:24: error: template argument 1 is invalid [-Wtemplate-body]
  202 |         operator xall<S>() const noexcept;
      |                        ^
/usr/include/xtensor/views/xslice.hpp:206:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:206:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:206:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  206 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:207:14: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |              ^
/usr/include/xtensor/views/xslice.hpp:207:15: error: template argument 1 is invalid [-Wtemplate-body]
  207 |         xall<S> convert() const noexcept;
      |               ^
/usr/include/xtensor/views/xslice.hpp:271:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:271:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:271:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  271 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:272:27: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                           ^
/usr/include/xtensor/views/xslice.hpp:272:28: error: template argument 1 is invalid [-Wtemplate-body]
  272 |         operator xnewaxis<S>() const noexcept;
      |                            ^
/usr/include/xtensor/views/xslice.hpp:276:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:276:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:276:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  276 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:277:18: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                  ^
/usr/include/xtensor/views/xslice.hpp:277:19: error: template argument 1 is invalid [-Wtemplate-body]
  277 |         xnewaxis<S> convert() const noexcept;
      |                   ^
/usr/include/xtensor/views/xslice.hpp:333:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  333 |             requires(!detail::is_xkeep_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:339:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:339:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:339:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  339 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:340:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:340:31: error: template argument 1 is invalid [-Wtemplate-body]
  340 |         operator xkeep_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:344:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:344:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:344:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  344 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:345:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:345:22: error: template argument 1 is invalid [-Wtemplate-body]
  345 |         xkeep_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:441:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  441 |             requires(!detail::is_xdrop_slice<std::decay_t<C>>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:447:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:447:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:447:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  447 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:448:30: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                              ^
/usr/include/xtensor/views/xslice.hpp:448:31: error: template argument 1 is invalid [-Wtemplate-body]
  448 |         operator xdrop_slice<S>() const noexcept;
      |                               ^
/usr/include/xtensor/views/xslice.hpp:452:19: error: ‘std::convertible_to’ has not been declared [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                   ^~~
/usr/include/xtensor/views/xslice.hpp:452:19: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:452:38: error: expected ‘>’ before ‘<’ token [-Wtemplate-body]
  452 |         template <std::convertible_to<T> S>
      |                                      ^
/usr/include/xtensor/views/xslice.hpp:453:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                     ^
/usr/include/xtensor/views/xslice.hpp:453:22: error: template argument 1 is invalid [-Wtemplate-body]
  453 |         xdrop_slice<S> convert() const noexcept;
      |                      ^
/usr/include/xtensor/views/xslice.hpp:997:15: error: ‘std::convertible_to’ has not been declared
  997 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:997:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:997:34: error: expected ‘>’ before ‘<’ token
  997 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:998:39: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                       ^
/usr/include/xtensor/views/xslice.hpp:998:40: error: template argument 1 is invalid [-Wtemplate-body]
  998 |     inline xrange<T>::operator xrange<S>() const noexcept
      |                                        ^
/usr/include/xtensor/views/xslice.hpp:1007:15: error: ‘std::convertible_to’ has not been declared
 1007 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1007:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1007:34: error: expected ‘>’ before ‘<’ token
 1007 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1008:19: error: ‘S’ was not declared in this scope
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                   ^
/usr/include/xtensor/views/xslice.hpp:1008:20: error: template argument 1 is invalid
 1008 |     inline xrange<S> xrange<T>::convert() const noexcept
      |                    ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xrange<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1010:23: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                       ^
/usr/include/xtensor/views/xslice.hpp:1010:24: error: template argument 1 is invalid [-Wtemplate-body]
 1010 |         return xrange<S>(*this);
      |                        ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1076:15: error: ‘std::convertible_to’ has not been declared
 1076 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1076:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1076:34: error: expected ‘>’ before ‘<’ token
 1076 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1077:55: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                       ^
/usr/include/xtensor/views/xslice.hpp:1077:56: error: template argument 1 is invalid [-Wtemplate-body]
 1077 |     inline xstepped_range<T>::operator xstepped_range<S>() const noexcept
      |                                                        ^
/usr/include/xtensor/views/xslice.hpp:1087:15: error: ‘std::convertible_to’ has not been declared
 1087 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1087:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1087:34: error: expected ‘>’ before ‘<’ token
 1087 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1088:27: error: ‘S’ was not declared in this scope
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                           ^
/usr/include/xtensor/views/xslice.hpp:1088:28: error: template argument 1 is invalid
 1088 |     inline xstepped_range<S> xstepped_range<T>::convert() const noexcept
      |                            ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xstepped_range<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1090:31: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                               ^
/usr/include/xtensor/views/xslice.hpp:1090:32: error: template argument 1 is invalid [-Wtemplate-body]
 1090 |         return xstepped_range<S>(*this);
      |                                ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1152:15: error: ‘std::convertible_to’ has not been declared
 1152 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1152:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1152:34: error: expected ‘>’ before ‘<’ token
 1152 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1153:35: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                   ^
/usr/include/xtensor/views/xslice.hpp:1153:36: error: template argument 1 is invalid [-Wtemplate-body]
 1153 |     inline xall<T>::operator xall<S>() const noexcept
      |                                    ^
/usr/include/xtensor/views/xslice.hpp:1159:15: error: ‘std::convertible_to’ has not been declared
 1159 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1159:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1159:34: error: expected ‘>’ before ‘<’ token
 1159 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1160:17: error: ‘S’ was not declared in this scope
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                 ^
/usr/include/xtensor/views/xslice.hpp:1160:18: error: template argument 1 is invalid
 1160 |     inline xall<S> xall<T>::convert() const noexcept
      |                  ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xall<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1162:21: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1162:22: error: template argument 1 is invalid [-Wtemplate-body]
 1162 |         return xall<S>(*this);
      |                      ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1218:15: error: ‘std::convertible_to’ has not been declared
 1218 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1218:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1218:34: error: expected ‘>’ before ‘<’ token
 1218 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1219:43: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                           ^
/usr/include/xtensor/views/xslice.hpp:1219:44: error: template argument 1 is invalid [-Wtemplate-body]
 1219 |     inline xnewaxis<T>::operator xnewaxis<S>() const noexcept
      |                                            ^
/usr/include/xtensor/views/xslice.hpp:1225:15: error: ‘std::convertible_to’ has not been declared
 1225 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1225:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1225:34: error: expected ‘>’ before ‘<’ token
 1225 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1226:21: error: ‘S’ was not declared in this scope
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                     ^
/usr/include/xtensor/views/xslice.hpp:1226:22: error: template argument 1 is invalid
 1226 |     inline xnewaxis<S> xnewaxis<T>::convert() const noexcept
      |                      ^
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xnewaxis<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1228:25: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                         ^
/usr/include/xtensor/views/xslice.hpp:1228:26: error: template argument 1 is invalid [-Wtemplate-body]
 1228 |         return xnewaxis<S>(*this);
      |                          ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1286:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1286 |         requires(!detail::is_xkeep_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1314:15: error: ‘std::convertible_to’ has not been declared
 1314 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1314:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1314:34: error: expected ‘>’ before ‘<’ token
 1314 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1315:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1315:50: error: template argument 1 is invalid [-Wtemplate-body]
 1315 |     inline xkeep_slice<T>::operator xkeep_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1344:15: error: ‘std::convertible_to’ has not been declared
 1344 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1344:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1344:34: error: expected ‘>’ before ‘<’ token
 1344 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1345:24: error: ‘S’ was not declared in this scope
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1345:25: error: template argument 1 is invalid
 1345 |     inline xkeep_slice<S> xkeep_slice<T>::convert() const noexcept
      |                         ^
In file included from /usr/include/xtensor/generators/xbuilder.hpp:31,
                 from /usr/include/xtensor/misc/xmanipulation.hpp:20,
                 from /usr/include/xtensor/core/xmath.hpp:30:
/usr/include/xtensor/generators/xgenerator.hpp:64:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   64 |     concept xgenerator_concept = is_specialization_of<xgenerator, std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/generators/xgenerator.hpp:64:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xkeep_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1347:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1347:29: error: template argument 1 is invalid [-Wtemplate-body]
 1347 |         return xkeep_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xslice.hpp: At global scope:
/usr/include/xtensor/views/xslice.hpp:1430:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1430 |         requires(!detail::is_xdrop_slice<std::decay_t<C>>::value)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1458:15: error: ‘std::convertible_to’ has not been declared
 1458 |     template <std::convertible_to<T> S>
      |               ^~~
/usr/include/xtensor/views/xslice.hpp:1458:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1458:34: error: expected ‘>’ before ‘<’ token
 1458 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/generators/xgenerator.hpp:86:15: error: ‘xgenerator_concept’ has not been declared
   86 |     template <xgenerator_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/generators/xgenerator.hpp:87:17: error: expected constructor, destructor, or type conversion before ‘(’ token
   87 |         requires(without_memory_address_concept<E>)
      |                 ^
/usr/include/xtensor/generators/xgenerator.hpp:172:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  172 |             requires(has_assign_to_v<E, FE>);
      |             ^~~~~~~~
/usr/include/xtensor/generators/xgenerator.hpp:379:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  379 |         requires(has_assign_to_v<E, FE>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xslice.hpp:1459:49: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                 ^
/usr/include/xtensor/views/xslice.hpp:1459:50: error: template argument 1 is invalid [-Wtemplate-body]
 1459 |     inline xdrop_slice<T>::operator xdrop_slice<S>() const noexcept
      |                                                  ^
/usr/include/xtensor/views/xslice.hpp:1496:15: error: ‘std::convertible_to’ has not been declared
 1496 |     template <std::convertible_to<T> S>
      |               ^~~
In file included from /usr/include/xtensor/generators/xbuilder.hpp:32:
/usr/include/xtensor/views/xbroadcast.hpp:76:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   76 |     concept xbroadcast_concept = is_specialization_of<xbroadcast, E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xbroadcast.hpp:76:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xslice.hpp:1496:15: note: ‘std::convertible_to’ is only available from C++20 onwards
/usr/include/xtensor/views/xslice.hpp:1496:34: error: expected ‘>’ before ‘<’ token
 1496 |     template <std::convertible_to<T> S>
      |                                  ^
/usr/include/xtensor/views/xslice.hpp:1497:24: error: ‘S’ was not declared in this scope
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                        ^
/usr/include/xtensor/views/xslice.hpp:1497:25: error: template argument 1 is invalid
 1497 |     inline xdrop_slice<S> xdrop_slice<T>::convert() const noexcept
      |                         ^
/usr/include/xtensor/views/xbroadcast.hpp:128:15: error: ‘xbroadcast_concept’ has not been declared
  128 |     template <xbroadcast_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:129:17: error: expected constructor, destructor, or type conversion before ‘(’ token
  129 |         requires(without_memory_address_concept<E>)
      |                 ^
In file included from /usr/include/xtensor/generators/xbuilder.hpp:31,
                 from /usr/include/xtensor/misc/xmanipulation.hpp:20,
                 from /usr/include/xtensor/core/xmath.hpp:30:
/usr/include/xtensor/generators/xgenerator.hpp:64:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   64 |     concept xgenerator_concept = is_specialization_of<xgenerator, std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/generators/xgenerator.hpp:64:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xslice.hpp: In member function ‘int xt::xdrop_slice<T>::convert() const’:
/usr/include/xtensor/views/xslice.hpp:1499:28: error: ‘S’ was not declared in this scope [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                            ^
/usr/include/xtensor/views/xslice.hpp:1499:29: error: template argument 1 is invalid [-Wtemplate-body]
 1499 |         return xdrop_slice<S>(*this);
      |                             ^
/usr/include/xtensor/views/xstrided_view_base.hpp: At global scope:
/usr/include/xtensor/views/xstrided_view_base.hpp:178:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  178 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:180:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  180 |             requires(provides_data_interface);
      |             ^~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:228:28: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                            ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:228:52: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                                                    ^
/usr/include/xtensor/views/xstrided_view_base.hpp:586:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  586 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view_base.hpp:597:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  597 |         requires(provides_data_interface)
      |         ^~~~~~~~
/usr/include/xtensor/generators/xgenerator.hpp:86:15: error: ‘xgenerator_concept’ has not been declared
   86 |     template <xgenerator_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/generators/xgenerator.hpp:87:17: error: expected constructor, destructor, or type conversion before ‘(’ token
   87 |         requires(without_memory_address_concept<E>)
      |                 ^
/usr/include/xtensor/generators/xgenerator.hpp:172:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  172 |             requires(has_assign_to_v<E, FE>);
      |             ^~~~~~~~
/usr/include/xtensor/generators/xgenerator.hpp:379:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  379 |         requires(has_assign_to_v<E, FE>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:468:24: error: ‘xscalar_concept’ has not been declared
  468 |     template <class E, xscalar_concept XCT>
      |                        ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:469:65: error: default argument for template parameter for class enclosing ‘void xt::xbroadcast<CT, X>::assign_to(xt::xexpression<E1>&) const’ [-Wtemplate-body]
  469 |     inline void xbroadcast<CT, X>::assign_to(xexpression<E>& e) const
      |                                                                 ^~~~~
In file included from /usr/include/xtensor/generators/xbuilder.hpp:32:
/usr/include/xtensor/views/xbroadcast.hpp:76:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   76 |     concept xbroadcast_concept = is_specialization_of<xbroadcast, E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xbroadcast.hpp:76:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xstrided_view.hpp:262:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  262 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:266:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  266 |             requires provides_simd_interface;
      |             ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:676:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  676 |         requires provides_simd_interface
      |         ^~~~~~~~
/usr/include/xtensor/views/xstrided_view.hpp:685:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  685 |         requires provides_simd_interface
      |         ^~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:128:15: error: ‘xbroadcast_concept’ has not been declared
  128 |     template <xbroadcast_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:129:17: error: expected constructor, destructor, or type conversion before ‘(’ token
  129 |         requires(without_memory_address_concept<E>)
      |                 ^
/usr/include/xtensor/generators/xbuilder.hpp:836:33: error: ‘fixed_shape_container_concept’ has not been declared
  836 |     template <std::size_t axis, fixed_shape_container_concept... CT>
      |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:228:28: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                            ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:228:52: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                                                    ^
In file included from /usr/include/xtensor/generators/xbuilder.hpp:31,
                 from /usr/include/xtensor/misc/xmanipulation.hpp:20,
                 from /usr/include/xtensor/core/xmath.hpp:30:
/usr/include/xtensor/generators/xgenerator.hpp:64:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   64 |     concept xgenerator_concept = is_specialization_of<xgenerator, std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/generators/xgenerator.hpp:64:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/generators/xbuilder.hpp:837:40: error: ‘CT’ was not declared in this scope
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:837:42: error: expected parameter pack before ‘...’
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                          ^~~
/usr/include/xtensor/generators/xbuilder.hpp:837:45: error: template argument 1 is invalid
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                             ^
/usr/include/xtensor/views/xbroadcast.hpp:468:24: error: ‘xscalar_concept’ has not been declared
  468 |     template <class E, xscalar_concept XCT>
      |                        ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:469:65: error: default argument for template parameter for class enclosing ‘void xt::xbroadcast<CT, X>::assign_to(xt::xexpression<E1>&) const’ [-Wtemplate-body]
  469 |     inline void xbroadcast<CT, X>::assign_to(xexpression<E>& e) const
      |                                                                 ^~~~~
/usr/include/xtensor/generators/xbuilder.hpp: In function ‘auto xt::concatenate(int&&)’:
/usr/include/xtensor/generators/xbuilder.hpp:839:85: error: ‘CT’ was not declared in this scope [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                     ^~
/usr/include/xtensor/generators/xgenerator.hpp:86:15: error: ‘xgenerator_concept’ has not been declared
   86 |     template <xgenerator_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/generators/xbuilder.hpp:839:87: error: template argument 1 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                       ^
/usr/include/xtensor/generators/xgenerator.hpp:87:17: error: expected constructor, destructor, or type conversion before ‘(’ token
   87 |         requires(without_memory_address_concept<E>)
      |                 ^
/usr/include/xtensor/generators/xbuilder.hpp:839:88: error: ‘<declaration error>’ is not a template [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:839:100: error: expected parameter pack before ‘...’ [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                    ^~~
/usr/include/xtensor/generators/xbuilder.hpp:839:103: error: template argument 2 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                       ^
/usr/include/xtensor/generators/xgenerator.hpp:172:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  172 |             requires(has_assign_to_v<E, FE>);
      |             ^~~~~~~~
/usr/include/xtensor/generators/xbuilder.hpp:840:67: error: expansion pattern ‘CT’ contains no parameter packs [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                   ^~~
/usr/include/xtensor/generators/xbuilder.hpp:840:70: error: template argument 1 is invalid [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                      ^
/usr/include/xtensor/generators/xgenerator.hpp:379:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  379 |         requires(has_assign_to_v<E, FE>)
      |         ^~~~~~~~
In file included from /usr/include/xtensor/generators/xbuilder.hpp:32:
/usr/include/xtensor/views/xbroadcast.hpp:76:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   76 |     concept xbroadcast_concept = is_specialization_of<xbroadcast, E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xbroadcast.hpp:76:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/generators/xbuilder.hpp:840:93: error: ‘shape_type’ was not declared in this scope [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                                             ^~~~~~~~~~
In file included from /usr/include/xtensor/generators/xbuilder.hpp:31,
                 from /usr/include/xtensor/misc/xmanipulation.hpp:20,
                 from /usr/include/xtensor/core/xmath.hpp:30:
/usr/include/xtensor/generators/xgenerator.hpp:64:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   64 |     concept xgenerator_concept = is_specialization_of<xgenerator, std::decay_t<T>>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/generators/xgenerator.hpp:64:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xbroadcast.hpp:128:15: error: ‘xbroadcast_concept’ has not been declared
  128 |     template <xbroadcast_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/generators/xbuilder.hpp:836:33: error: ‘fixed_shape_container_concept’ has not been declared
  836 |     template <std::size_t axis, fixed_shape_container_concept... CT>
      |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:129:17: error: expected constructor, destructor, or type conversion before ‘(’ token
  129 |         requires(without_memory_address_concept<E>)
      |                 ^
In file included from /usr/include/xtensor/misc/xmanipulation.hpp:25:
/usr/include/xtensor/misc/xtl_concepts.hpp: At global scope:
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   19 |     concept integral_concept = xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/generators/xbuilder.hpp:837:40: error: ‘CT’ was not declared in this scope
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:837:42: error: expected parameter pack before ‘...’
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                          ^~~
/usr/include/xtensor/generators/xbuilder.hpp:837:45: error: template argument 1 is invalid
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                             ^
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   22 |     concept non_integral_concept = !xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/generators/xgenerator.hpp:86:15: error: ‘xgenerator_concept’ has not been declared
   86 |     template <xgenerator_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/generators/xgenerator.hpp:87:17: error: expected constructor, destructor, or type conversion before ‘(’ token
   87 |         requires(without_memory_address_concept<E>)
      |                 ^
/usr/include/xtensor/views/xbroadcast.hpp:228:28: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                            ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:228:52: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                                                    ^
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   25 |     concept complex_concept = xtl::is_complex<typename std::decay<T>::type::value_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/generators/xgenerator.hpp:172:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  172 |             requires(has_assign_to_v<E, FE>);
      |             ^~~~~~~~
/usr/include/xtensor/generators/xbuilder.hpp: In function ‘auto xt::concatenate(int&&)’:
/usr/include/xtensor/generators/xbuilder.hpp:839:85: error: ‘CT’ was not declared in this scope [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                     ^~
/usr/include/xtensor/generators/xbuilder.hpp:839:87: error: template argument 1 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                       ^
/usr/include/xtensor/generators/xbuilder.hpp:839:88: error: ‘<declaration error>’ is not a template [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:839:100: error: expected parameter pack before ‘...’ [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                    ^~~
/usr/include/xtensor/generators/xgenerator.hpp:379:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  379 |         requires(has_assign_to_v<E, FE>)
      |         ^~~~~~~~
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   28 |     concept pointer_concept = std::is_pointer<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/generators/xbuilder.hpp:839:103: error: template argument 2 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                       ^
/usr/include/xtensor/generators/xbuilder.hpp:840:67: error: expansion pattern ‘CT’ contains no parameter packs [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                   ^~~
/usr/include/xtensor/generators/xbuilder.hpp:840:70: error: template argument 1 is invalid [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                      ^
/usr/include/xtensor/misc/xmanipulation.hpp:68:24: error: ‘xtl::non_integral_concept’ has not been declared
   68 |     template <class E, xtl::non_integral_concept S, class Tag = check_policy::none>
      |                        ^~~
/usr/include/xtensor/misc/xmanipulation.hpp:69:25: error: ‘S’ has not been declared
   69 |     auto squeeze(E&& e, S&& axis, Tag check_policy = Tag());
      |                         ^
/usr/include/xtensor/views/xbroadcast.hpp:468:24: error: ‘xscalar_concept’ has not been declared
  468 |     template <class E, xscalar_concept XCT>
      |                        ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:469:65: error: default argument for template parameter for class enclosing ‘void xt::xbroadcast<CT, X>::assign_to(xt::xexpression<E1>&) const’ [-Wtemplate-body]
  469 |     inline void xbroadcast<CT, X>::assign_to(xexpression<E>& e) const
      |                                                                 ^~~~~
/usr/include/xtensor/misc/xmanipulation.hpp:593:24: error: ‘xtl::non_integral_concept’ has not been declared
  593 |     template <class E, xtl::non_integral_concept S, class Tag>
      |                        ^~~
In file included from /usr/include/xtensor/generators/xbuilder.hpp:32:
/usr/include/xtensor/views/xbroadcast.hpp:76:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   76 |     concept xbroadcast_concept = is_specialization_of<xbroadcast, E>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xbroadcast.hpp:76:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xmanipulation.hpp:594:32: error: ‘S’ has not been declared
  594 |     inline auto squeeze(E&& e, S&& axis, Tag check_policy)
      |                                ^
/usr/include/xtensor/generators/xbuilder.hpp:840:93: error: ‘shape_type’ was not declared in this scope [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                                             ^~~~~~~~~~
/usr/include/xtensor/misc/xmanipulation.hpp: In function ‘auto xt::squeeze(E&&, int&&, Tag)’:
/usr/include/xtensor/misc/xmanipulation.hpp:596:70: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  596 |         return detail::squeeze_impl(std::forward<E>(e), std::forward<S>(axis), check_policy);
      |                                                                      ^
In file included from /usr/include/xtensor/misc/xmanipulation.hpp:25:
/usr/include/xtensor/misc/xtl_concepts.hpp: At global scope:
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   19 |     concept integral_concept = xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xbroadcast.hpp:128:15: error: ‘xbroadcast_concept’ has not been declared
  128 |     template <xbroadcast_concept E>
      |               ^~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:129:17: error: expected constructor, destructor, or type conversion before ‘(’ token
  129 |         requires(without_memory_address_concept<E>)
      |                 ^
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   22 |     concept non_integral_concept = !xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   25 |     concept complex_concept = xtl::is_complex<typename std::decay<T>::type::value_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/generators/xbuilder.hpp:836:33: error: ‘fixed_shape_container_concept’ has not been declared
  836 |     template <std::size_t axis, fixed_shape_container_concept... CT>
      |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   28 |     concept pointer_concept = std::is_pointer<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xmanipulation.hpp:68:24: error: ‘xtl::non_integral_concept’ has not been declared
   68 |     template <class E, xtl::non_integral_concept S, class Tag = check_policy::none>
      |                        ^~~
/usr/include/xtensor/views/xbroadcast.hpp:228:28: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                            ^~~~~~~~~~~~~~~
/usr/include/xtensor/generators/xbuilder.hpp:837:40: error: ‘CT’ was not declared in this scope
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:837:42: error: expected parameter pack before ‘...’
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                          ^~~
/usr/include/xtensor/generators/xbuilder.hpp:837:45: error: template argument 1 is invalid
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                             ^
/usr/include/xtensor/misc/xmanipulation.hpp:69:25: error: ‘S’ has not been declared
   69 |     auto squeeze(E&& e, S&& axis, Tag check_policy = Tag());
      |                         ^
/usr/include/xtensor/views/xbroadcast.hpp:228:52: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  228 |         template <class E, xscalar_concept XCT = CT>
      |                                                    ^
/usr/include/xtensor/misc/xmanipulation.hpp:593:24: error: ‘xtl::non_integral_concept’ has not been declared
  593 |     template <class E, xtl::non_integral_concept S, class Tag>
      |                        ^~~
/usr/include/xtensor/generators/xbuilder.hpp: In function ‘auto xt::concatenate(int&&)’:
/usr/include/xtensor/generators/xbuilder.hpp:839:85: error: ‘CT’ was not declared in this scope [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                     ^~
/usr/include/xtensor/generators/xbuilder.hpp:839:87: error: template argument 1 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                       ^
/usr/include/xtensor/generators/xbuilder.hpp:839:88: error: ‘<declaration error>’ is not a template [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:839:100: error: expected parameter pack before ‘...’ [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                    ^~~
/usr/include/xtensor/generators/xbuilder.hpp:839:103: error: template argument 2 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                       ^
/usr/include/xtensor/generators/xbuilder.hpp:840:67: error: expansion pattern ‘CT’ contains no parameter packs [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                   ^~~
/usr/include/xtensor/generators/xbuilder.hpp:840:70: error: template argument 1 is invalid [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                      ^
/usr/include/xtensor/misc/xmanipulation.hpp:594:32: error: ‘S’ has not been declared
  594 |     inline auto squeeze(E&& e, S&& axis, Tag check_policy)
      |                                ^
/usr/include/xtensor/misc/xmanipulation.hpp: In function ‘auto xt::squeeze(E&&, int&&, Tag)’:
/usr/include/xtensor/misc/xmanipulation.hpp:596:70: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  596 |         return detail::squeeze_impl(std::forward<E>(e), std::forward<S>(axis), check_policy);
      |                                                                      ^
/usr/include/xtensor/views/xbroadcast.hpp:468:24: error: ‘xscalar_concept’ has not been declared
  468 |     template <class E, xscalar_concept XCT>
      |                        ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xbroadcast.hpp:469:65: error: default argument for template parameter for class enclosing ‘void xt::xbroadcast<CT, X>::assign_to(xt::xexpression<E1>&) const’ [-Wtemplate-body]
  469 |     inline void xbroadcast<CT, X>::assign_to(xexpression<E>& e) const
      |                                                                 ^~~~~
/usr/include/xtensor/generators/xbuilder.hpp:840:93: error: ‘shape_type’ was not declared in this scope [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                                             ^~~~~~~~~~
In file included from /usr/include/xtensor/misc/xmanipulation.hpp:25:
/usr/include/xtensor/misc/xtl_concepts.hpp: At global scope:
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   19 |     concept integral_concept = xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   22 |     concept non_integral_concept = !xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   25 |     concept complex_concept = xtl::is_complex<typename std::decay<T>::type::value_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   28 |     concept pointer_concept = std::is_pointer<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xmanipulation.hpp:68:24: error: ‘xtl::non_integral_concept’ has not been declared
   68 |     template <class E, xtl::non_integral_concept S, class Tag = check_policy::none>
      |                        ^~~
/usr/include/xtensor/generators/xbuilder.hpp:836:33: error: ‘fixed_shape_container_concept’ has not been declared
  836 |     template <std::size_t axis, fixed_shape_container_concept... CT>
      |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/misc/xmanipulation.hpp:69:25: error: ‘S’ has not been declared
   69 |     auto squeeze(E&& e, S&& axis, Tag check_policy = Tag());
      |                         ^
/usr/include/xtensor/misc/xmanipulation.hpp:593:24: error: ‘xtl::non_integral_concept’ has not been declared
  593 |     template <class E, xtl::non_integral_concept S, class Tag>
      |                        ^~~
/usr/include/xtensor/generators/xbuilder.hpp:837:40: error: ‘CT’ was not declared in this scope
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:837:42: error: expected parameter pack before ‘...’
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                          ^~~
/usr/include/xtensor/generators/xbuilder.hpp:837:45: error: template argument 1 is invalid
  837 |     inline auto concatenate(std::tuple<CT...>&& t)
      |                                             ^
/usr/include/xtensor/misc/xmanipulation.hpp:594:32: error: ‘S’ has not been declared
  594 |     inline auto squeeze(E&& e, S&& axis, Tag check_policy)
      |                                ^
/usr/include/xtensor/misc/xmanipulation.hpp: In function ‘auto xt::squeeze(E&&, int&&, Tag)’:
/usr/include/xtensor/misc/xmanipulation.hpp:596:70: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  596 |         return detail::squeeze_impl(std::forward<E>(e), std::forward<S>(axis), check_policy);
      |                                                                      ^
/usr/include/xtensor/generators/xbuilder.hpp: In function ‘auto xt::concatenate(int&&)’:
/usr/include/xtensor/generators/xbuilder.hpp:839:85: error: ‘CT’ was not declared in this scope [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                     ^~
/usr/include/xtensor/generators/xbuilder.hpp:839:87: error: template argument 1 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                       ^
/usr/include/xtensor/generators/xbuilder.hpp:839:88: error: ‘<declaration error>’ is not a template [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                        ^~
/usr/include/xtensor/generators/xbuilder.hpp:839:100: error: expected parameter pack before ‘...’ [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                    ^~~
/usr/include/xtensor/generators/xbuilder.hpp:839:103: error: template argument 2 is invalid [-Wtemplate-body]
  839 |         using shape_type = detail::concat_fixed_shape_t<axis, typename std::decay_t<CT>::shape_type...>;
      |                                                                                                       ^
/usr/include/xtensor/generators/xbuilder.hpp:840:67: error: expansion pattern ‘CT’ contains no parameter packs [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                   ^~~
/usr/include/xtensor/generators/xbuilder.hpp:840:70: error: template argument 1 is invalid [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                      ^
/usr/include/xtensor/generators/xbuilder.hpp:840:93: error: ‘shape_type’ was not declared in this scope [-Wtemplate-body]
  840 |         return detail::make_xgenerator(detail::concatenate_impl<CT...>(std::move(t), axis), shape_type{});
      |                                                                                             ^~~~~~~~~~
In file included from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/xtensor_type_caster_base.hpp:18,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pynative_casters.hpp:13,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:24:
/usr/include/xtensor/containers/xfixed.hpp: At global scope:
/usr/include/xtensor/containers/xfixed.hpp:330:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  330 |             requires(IX::value != 0);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xfixed.hpp:644:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  644 |         requires(IX::value != 0)
      |         ^~~~~~~~
In file included from /usr/include/xtensor/misc/xmanipulation.hpp:25:
/usr/include/xtensor/misc/xtl_concepts.hpp: At global scope:
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   19 |     concept integral_concept = xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:19:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   22 |     concept non_integral_concept = !xtl::is_integral<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:22:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   25 |     concept complex_concept = xtl::is_complex<typename std::decay<T>::type::value_type>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:25:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: error: ‘concept’ does not name a type; did you mean ‘const’?
   28 |     concept pointer_concept = std::is_pointer<T>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/misc/xtl_concepts.hpp:28:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/misc/xmanipulation.hpp:68:24: error: ‘xtl::non_integral_concept’ has not been declared
   68 |     template <class E, xtl::non_integral_concept S, class Tag = check_policy::none>
      |                        ^~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<double> >’:
required from ‘class xt::pyarray<double>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray_traits.cpp:28:63:   
   28 |             dynamic_type d1 = {{0., 1.}, {0., 10.}, {0., 100.}};
      |                                                               ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<double> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/usr/include/xtensor/misc/xmanipulation.hpp:69:25: error: ‘S’ has not been declared
   69 |     auto squeeze(E&& e, S&& axis, Tag check_policy = Tag());
      |                         ^
/usr/include/xtensor/misc/xmanipulation.hpp:593:24: error: ‘xtl::non_integral_concept’ has not been declared
  593 |     template <class E, xtl::non_integral_concept S, class Tag>
      |                        ^~~
/usr/include/xtensor/misc/xmanipulation.hpp:594:32: error: ‘S’ has not been declared
  594 |     inline auto squeeze(E&& e, S&& axis, Tag check_policy)
      |                                ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<double, xt::layout_type::row_major> >’:
required from ‘class xt::pyarray<double, xt::layout_type::row_major>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray_traits.cpp:31:65:   
   31 |             row_major_type r1 = {{0., 1.}, {0., 10.}, {0., 100.}};
      |                                                                 ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<double, xt::layout_type::row_major> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
In file included from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/xtensor_type_caster_base.hpp:18,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pynative_casters.hpp:13,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:24:
/usr/include/xtensor/containers/xfixed.hpp: At global scope:
/usr/include/xtensor/containers/xfixed.hpp:330:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  330 |             requires(IX::value != 0);
      |             ^~~~~~~~
/usr/include/xtensor/misc/xmanipulation.hpp: In function ‘auto xt::squeeze(E&&, int&&, Tag)’:
/usr/include/xtensor/misc/xmanipulation.hpp:596:70: error: ‘S’ was not declared in this scope [-Wtemplate-body]
  596 |         return detail::squeeze_impl(std::forward<E>(e), std::forward<S>(axis), check_policy);
      |                                                                      ^
/usr/include/xtensor/containers/xfixed.hpp:644:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  644 |         requires(IX::value != 0)
      |         ^~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<double, xt::layout_type::column_major> >’:
required from ‘class xt::pyarray<double, xt::layout_type::column_major>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray_traits.cpp:34:68:   
   34 |             column_major_type c1 = {{0., 1.}, {0., 10.}, {0., 100.}};
      |                                                                    ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<double, xt::layout_type::column_major> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
In file included from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:15:
/usr/include/xtensor/views/xview.hpp:293:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  293 |     concept contiguous_view_concept = detail::is_contiguous_view<E, S...>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xview.hpp:293:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xview.hpp:295:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  295 |     concept strided_view_concept = detail::is_strided_view<std::decay_t<E>, S...>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xview.hpp:295:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xview.hpp:513:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |             ^~~~~~~~
In file included from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/xtensor_type_caster_base.hpp:18,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pynative_casters.hpp:13,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:24:
/usr/include/xtensor/containers/xfixed.hpp: At global scope:
/usr/include/xtensor/containers/xfixed.hpp:330:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  330 |             requires(IX::value != 0);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xfixed.hpp:644:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  644 |         requires(IX::value != 0)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:513:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:513:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:513:51: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |                                                   ^
/usr/include/xtensor/views/xview.hpp:517:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:517:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:517:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:517:51: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |                                                   ^
/usr/include/xtensor/views/xview.hpp:521:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
In file included from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/xtensor_type_caster_base.hpp:18,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pynative_casters.hpp:13,
                 from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:24:
/usr/include/xtensor/containers/xfixed.hpp: At global scope:
/usr/include/xtensor/containers/xfixed.hpp:330:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  330 |             requires(IX::value != 0);
      |             ^~~~~~~~
/usr/include/xtensor/containers/xfixed.hpp:644:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  644 |         requires(IX::value != 0)
      |         ^~~~~~~~
In file included from /builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:15:
/usr/include/xtensor/views/xview.hpp:293:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  293 |     concept contiguous_view_concept = detail::is_contiguous_view<E, S...>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xview.hpp:293:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xview.hpp:295:5: error: ‘concept’ does not name a type; did you mean ‘const’?
  295 |     concept strided_view_concept = detail::is_strided_view<std::decay_t<E>, S...>::value;
      |     ^~~~~~~
      |     const
/usr/include/xtensor/views/xview.hpp:295:5: note: ‘concept’ only available with ‘-std=c++20’ or ‘-fconcepts’
/usr/include/xtensor/views/xview.hpp:521:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:513:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:521:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:521:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:521:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:521:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:521:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:525:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:525:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:525:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:525:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:525:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:525:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:525:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:529:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:513:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:513:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:513:51: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
  513 |             requires(has_data_interface_concept<T>);
      |                                                   ^
/usr/include/xtensor/views/xview.hpp:517:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:529:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:529:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:529:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:529:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:529:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:529:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:533:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:517:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:517:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:517:51: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
  517 |             requires(has_data_interface_concept<T>);
      |                                                   ^
/usr/include/xtensor/views/xview.hpp:521:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:533:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:533:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:533:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:533:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:533:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:533:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:537:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:521:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:521:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:521:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:521:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:521:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:521:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  521 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:525:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:537:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:537:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:537:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:537:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:537:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:537:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:541:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:525:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:525:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:525:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:525:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:525:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:525:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  525 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:529:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:541:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:541:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:541:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:541:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:541:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:541:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:545:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:529:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:529:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:529:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:529:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:529:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:529:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  529 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:533:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:545:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:545:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:545:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:545:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:545:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:545:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:549:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:533:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:533:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:533:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:533:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:533:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:533:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  533 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:537:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:549:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:549:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:549:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:549:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:549:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:549:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:553:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:537:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:537:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:537:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:537:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:537:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:537:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  537 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:541:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:553:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:553:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:553:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:553:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:553:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:553:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:557:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:541:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:541:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:541:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:541:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:541:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:541:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  541 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:545:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:557:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:557:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:557:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:557:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:557:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:557:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:561:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:545:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:545:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:545:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:545:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:545:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:545:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  545 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:549:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:561:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:561:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:561:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:561:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:561:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:561:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:565:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:565:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:549:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:549:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:549:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:549:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:549:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:549:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  549 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:553:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:565:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:565:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:565:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:565:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:565:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:569:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:569:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:569:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:569:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:569:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:569:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:569:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:573:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:553:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:553:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:553:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:553:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:553:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:553:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  553 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:557:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:573:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:573:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:573:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:573:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:573:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:573:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:577:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:557:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:557:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:557:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:557:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:557:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:557:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  557 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:561:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:577:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:577:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:577:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:577:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:577:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:577:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:581:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:561:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:561:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:561:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:561:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:561:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:561:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  561 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:565:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:581:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:581:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:581:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:581:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:581:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:581:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:585:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:565:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:565:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:565:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:565:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:565:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:565:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  565 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:569:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:585:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:585:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:585:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:585:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:585:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:585:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:599:19: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  599 |         template <xscalar_concept ST = self_type>
      |                   ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:599:49: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  599 |         template <xscalar_concept ST = self_type>
      |                                                 ^
/usr/include/xtensor/views/xview.hpp:569:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:569:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:569:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:569:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:569:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:569:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  569 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:573:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:605:19: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  605 |         template <xscalar_concept ST = self_type>
      |                   ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:605:49: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  605 |         template <xscalar_concept ST = self_type>
      |                                                 ^
/usr/include/xtensor/views/xview.hpp:619:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:573:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:573:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:573:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:573:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:573:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:573:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  573 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:577:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:619:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:619:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:619:56: error: label ‘contiguous_view_concept’ referenced outside of any function [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:619:81: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                                                 ^
/usr/include/xtensor/views/xview.hpp:619:84: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                                                    ^~~
/usr/include/xtensor/views/xview.hpp:619:84: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                     ~                                                              ^~~
      |                                                                                    )
/usr/include/xtensor/views/xview.hpp:636:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:577:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:577:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:577:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:577:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:577:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:577:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  577 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:581:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:636:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:636:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:636:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:636:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:636:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:636:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:644:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:581:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:581:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:581:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:581:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:581:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:581:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  581 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:585:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:644:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:644:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:644:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:644:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:644:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:644:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:648:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:585:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:585:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:585:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:585:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:585:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:585:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  585 |             requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:648:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:648:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:648:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:648:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:648:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:648:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:652:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:599:19: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  599 |         template <xscalar_concept ST = self_type>
      |                   ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:599:49: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  599 |         template <xscalar_concept ST = self_type>
      |                                                 ^
/usr/include/xtensor/views/xview.hpp:605:19: error: ‘xscalar_concept’ has not been declared [-Wtemplate-body]
  605 |         template <xscalar_concept ST = self_type>
      |                   ^~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:605:49: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  605 |         template <xscalar_concept ST = self_type>
      |                                                 ^
/usr/include/xtensor/views/xview.hpp:619:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:652:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:652:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:652:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:652:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:652:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:652:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:656:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:619:22: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_data_interface
/usr/include/xtensor/views/xview.hpp:619:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:619:56: error: label ‘contiguous_view_concept’ referenced outside of any function [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:619:81: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                                                 ^
/usr/include/xtensor/views/xview.hpp:619:84: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                                                                                    ^~~
/usr/include/xtensor/views/xview.hpp:619:84: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  619 |             requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>);
      |                     ~                                                              ^~~
      |                                                                                    )
/usr/include/xtensor/views/xview.hpp:636:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:656:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:656:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:656:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:656:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:656:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:656:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:660:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:636:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:636:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:636:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:636:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:636:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:636:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  636 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:644:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:660:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:660:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:660:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:660:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:660:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:660:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:724:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  724 |             requires(!is_xslice<T>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:644:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:644:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:644:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:644:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:644:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:644:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  644 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:648:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1156:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:648:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:648:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:648:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:648:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:648:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:648:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  648 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:652:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1156:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1156:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1156:47: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |                                               ^
/usr/include/xtensor/views/xview.hpp:1164:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:652:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:652:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:652:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:652:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:652:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:652:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  652 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:656:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1164:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1164:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1164:47: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |                                               ^
/usr/include/xtensor/views/xview.hpp:1172:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:656:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:656:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:656:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:656:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:656:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:656:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  656 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:660:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1172:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1172:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1172:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1172:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1172:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1172:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1177:5: error: expected initializer before ‘template’
 1177 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1188:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:660:22: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      has_simd_interface
/usr/include/xtensor/views/xview.hpp:660:50: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                  ^
/usr/include/xtensor/views/xview.hpp:660:56: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                        ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:660:79: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                               ^
/usr/include/xtensor/views/xview.hpp:660:82: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                                                                                  ^~~
/usr/include/xtensor/views/xview.hpp:660:82: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
  660 |             requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>);
      |                     ~                                                            ^~~
      |                                                                                  )
/usr/include/xtensor/views/xview.hpp:724:13: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
  724 |             requires(!is_xslice<T>::value);
      |             ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1156:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1188:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1188:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1188:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1188:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1188:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1188:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1193:5: error: expected initializer before ‘template’
 1193 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1204:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1156:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1156:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1156:47: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
 1156 |         requires(has_data_interface_concept<T>)
      |                                               ^
/usr/include/xtensor/views/xview.hpp:1164:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1204:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1204:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1204:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1204:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1204:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1204:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1209:5: error: expected initializer before ‘template’
 1209 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1220:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1164:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1164:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1164:47: error: expected primary-expression before ‘)’ token [-Wtemplate-body]
 1164 |         requires(has_data_interface_concept<T>)
      |                                               ^
/usr/include/xtensor/views/xview.hpp:1172:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1220:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1220:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1220:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1220:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1220:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1220:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1225:5: error: expected initializer before ‘template’
 1225 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1236:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1172:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1172:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1172:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1172:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1172:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1172:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1172 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1177:5: error: expected initializer before ‘template’
 1177 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1188:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
In file included from /usr/include/xtensor/utils/xexception.hpp:21,
                 from /usr/include/xtensor/containers/xstorage.hpp:22:
/usr/include/xtl/xsequence.hpp: In instantiation of ‘static auto xtl::detail::sequence_forwarder_impl<R, A, std::void_t<decltype (declval<R>().resize(std::declval<long unsigned int>()))> >::forward(const T&) [with T = xt::xbuffer_adaptor<long unsigned int*>; R = xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>; A = xt::xbuffer_adaptor<long unsigned int*>]’:
required from ‘decltype(auto) xtl::forward_sequence(typename std::remove_reference<_Arg>::type&) [with R = xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>; A = const xt::xbuffer_adaptor<long unsigned int*>&; typename std::remove_reference<_Arg>::type = const xt::xbuffer_adaptor<long unsigned int*>]’
/usr/include/xtl/xsequence.hpp:166:34:   
  166 |         return forwarder::forward(std::forward<A>(s));
      |                ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
required from ‘xt::xiterator<St, S, L>::xiterator(St, shape_param_type, bool) [with St = xt::xstepper<xt::pyarray<double> >; S = xt::xbuffer_adaptor<long unsigned int*>*; xt::layout_type L = xt::layout_type::row_major; shape_param_type = const xt::xbuffer_adaptor<long unsigned int*>*]’
/usr/include/xtensor/core/xiterator.hpp:1089:79:   
 1089 |               end_index ? xtl::forward_sequence<index_type, const shape_type&>(this->shape())
      |                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
required from ‘xt::xiterable<D>::layout_iterator<L> xt::xiterable<D>::get_begin(bool) [with xt::layout_type L = xt::layout_type::row_major; D = xt::pyarray<double>; layout_iterator<L> = xt::xiterator<xt::xstepper<xt::pyarray<double> >, xt::xbuffer_adaptor<long unsigned int*>*, xt::layout_type::row_major>]’
/usr/include/xtensor/core/xiterable.hpp:877:16:   
  877 |         return layout_iterator<L>(get_stepper_begin(this->get_shape()), &(this->get_shape()), end_index);
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from ‘xt::xiterable<D>::layout_iterator<L> xt::xiterable<D>::begin() [with xt::layout_type L = xt::layout_type::row_major; D = xt::pyarray<double>; layout_iterator<L> = xt::xiterator<xt::xstepper<xt::pyarray<double> >, xt::xbuffer_adaptor<long unsigned int*>*, xt::layout_type::row_major>]’
/usr/include/xtensor/core/xiterable.hpp:759:28:   
  759 |         return get_begin<L>(false);
      |                ~~~~~~~~~~~~^~~~~~~
required from ‘xt::xcontiguous_iterable<D>::select_iterator<L> xt::xcontiguous_iterable<D>::begin() [with xt::layout_type L = xt::layout_type::row_major; D = xt::pyarray<double>; select_iterator<L> = xt::xiterator<xt::xstepper<xt::pyarray<double> >, xt::xbuffer_adaptor<long unsigned int*>*, xt::layout_type::row_major>]’
/usr/include/xtensor/core/xiterable.hpp:957:52:   
  957 |             return iterable_base::template begin<L>();
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
required from ‘xt::pyarray<T, L>::pyarray(xt::nested_initializer_list_t<T, 2>) [with T = double; xt::layout_type L = xt::layout_type::dynamic; xt::nested_initializer_list_t<T, 2> = std::initializer_list<std::initializer_list<double> >]’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:278:131:   
  278 |         L == layout_type::row_major ? nested_copy(m_storage.begin(), t) : nested_copy(this->template begin<layout_type::row_major>(), t);
      |                                                                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray_traits.cpp:28:63:   
   28 |             dynamic_type d1 = {{0., 1.}, {0., 10.}, {0., 100.}};
      |                                                               ^
/usr/include/xtl/xsequence.hpp:135:24: error: no matching function for call to ‘xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>::svector(xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator, xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator)’
  135 |                 return R(std::begin(r), std::end(r));
      |                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  • there are 9 candidates
    • candidate 1: ‘xt::svector<T, N, A, Init>::svector(size_type, const value_type&, const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; size_type = long unsigned int; value_type = long unsigned int; allocator_type = std::allocator<long unsigned int>]’ (near match)
      /usr/include/xtensor/containers/xstorage.hpp:829:12:
        829 |     inline svector<T, N, A, Init>::svector(size_type n, const value_type& v, const allocator_type& alloc)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • conversion of argument 2 would be ill-formed:
      • error: invalid conversion from ‘xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator’ {aka ‘const long unsigned int*’} to ‘xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>::value_type’ {aka ‘long unsigned int’} [-fpermissive]
        /usr/include/xtl/xsequence.hpp:135:49:
          135 |                 return R(std::begin(r), std::end(r));
              |                                         ~~~~~~~~^~~
              |                                                 |
              |                                                 xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator {aka const long unsigned int*}
    • candidate 2: ‘xt::svector<T, N, A, Init>::svector(size_type, const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; size_type = long unsigned int; allocator_type = std::allocator<long unsigned int>]’
      /usr/include/xtensor/containers/xstorage.hpp:792:12:
        792 |     inline svector<T, N, A, Init>::svector(size_type n, const allocator_type& alloc)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • no known conversion for argument 2 from ‘xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator’ {aka ‘const long unsigned int*’} to ‘const xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>::allocator_type&’ {aka ‘const std::allocator<long unsigned int>&’}
        /usr/include/xtensor/containers/xstorage.hpp:792:79:
          792 |     inline svector<T, N, A, Init>::svector(size_type n, const allocator_type& alloc)
              |                                                         ~~~~~~~~~~~~~~~~~~~~~~^~~~~
    • candidate 3: ‘template<long unsigned int N2, bool I2> xt::svector<T, N, A, Init>::svector(const xt::svector<T, N2, A, I2>&) [with long unsigned int N2 = N2; bool I2 = I2; T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:674:18:
        674 |         explicit svector(const svector<T, N2, A, I2>& rhs)
            |                  ^~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 4: ‘xt::svector<T, N, A, Init>::svector(xt::svector<T, N, A, Init>&&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:895:12:
        895 |     inline svector<T, N, A, Init>::svector(svector&& rhs
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 5: ‘xt::svector<T, N, A, Init>::svector(const xt::svector<T, N, A, Init>&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:886:12:
        886 |     inline svector<T, N, A, Init>::svector(const svector& rhs)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 6: ‘xt::svector<T, N, A, Init>::svector(const std::vector<T>&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:823:12:
        823 |     inline svector<T, N, A, Init>::svector(const std::vector<T>& vec)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 7: ‘xt::svector<T, N, A, Init>::svector(std::initializer_list<_Tp>, const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; allocator_type = std::allocator<long unsigned int>]’
      /usr/include/xtensor/containers/xstorage.hpp:836:12:
        836 |     inline svector<T, N, A, Init>::svector(std::initializer_list<T> il, const allocator_type& alloc)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • no known conversion for argument 1 from ‘xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator’ {aka ‘const long unsigned int*’} to ‘std::initializer_list<long unsigned int>’
        /usr/include/xtensor/containers/xstorage.hpp:836:69:
          836 |     inline svector<T, N, A, Init>::svector(std::initializer_list<T> il, const allocator_type& alloc)
              |                                            ~~~~~~~~~~~~~~~~~~~~~~~~~^~
    • candidate 8: ‘xt::svector<T, N, A, Init>::svector(const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; allocator_type = std::allocator<long unsigned int>]’
      /usr/include/xtensor/containers/xstorage.hpp:786:12:
        786 |     inline svector<T, N, A, Init>::svector(const allocator_type& alloc) noexcept
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 9: ‘xt::svector<T, N, A, Init>::svector() [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:780:12:
        780 |     inline svector<T, N, A, Init>::svector() noexcept
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 0 arguments, 2 provided
/usr/include/xtensor/views/xview.hpp:1236:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1236:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1236:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1236:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1236:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1236:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1241:5: error: expected initializer before ‘template’
 1241 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1252:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
gmake[2]: *** [test/CMakeFiles/test_xtensor_python.dir/build.make:82: test/CMakeFiles/test_xtensor_python.dir/main.cpp.o] Error 1
gmake[2]: *** Waiting for unfinished jobs....
/usr/include/xtensor/views/xview.hpp:1252:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1252:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1252:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1252:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1252:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1252:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1257:5: error: expected initializer before ‘template’
 1257 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1271:38: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                      ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1188:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1188:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1188:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1188:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1188:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1188:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1188 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1193:5: error: expected initializer before ‘template’
 1193 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1204:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1271:47: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                               has_data_interface
/usr/include/xtensor/views/xview.hpp:1271:75: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1271:80: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                                ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1271:103: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                                                       ^
/usr/include/xtensor/views/xview.hpp:1271:106: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                                                          ^~~
/usr/include/xtensor/views/xview.hpp:1271:106: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                              ~                                                           ^~~
      |                                                                                                          )
/usr/include/xtensor/views/xview.hpp:1280:5: error: expected initializer before ‘template’
 1280 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1298:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1204:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1204:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1204:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1204:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1204:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1204:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1204 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1209:5: error: expected initializer before ‘template’
 1209 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1220:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1298:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1298:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1298:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1298:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1298:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1298:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1303:5: error: expected initializer before ‘template’
 1303 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1338:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1220:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1220:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1220:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1220:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1220:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1220:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1220 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1225:5: error: expected initializer before ‘template’
 1225 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1236:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1338:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1338:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1338:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1338:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1338:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1338:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1350:5: error: expected initializer before ‘template’
 1350 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1455:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1455:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1455:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1455:52: error: label ‘contiguous_view_concept’ referenced outside of any function [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1455:77: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                                                             ^
/usr/include/xtensor/views/xview.hpp:1455:80: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                                                                ^~~
/usr/include/xtensor/views/xview.hpp:1455:80: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                 ~                                                              ^~~
      |                                                                                )
/usr/include/xtensor/views/xview.hpp:1462:5: error: expected initializer before ‘template’
 1462 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1479:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1236:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1236:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1236:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1236:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1236:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1236:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1236 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1241:5: error: expected initializer before ‘template’
 1241 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1252:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1479:18: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_simd_interface
/usr/include/xtensor/views/xview.hpp:1479:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1479:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1479:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1479:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1479:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1484:5: error: expected initializer before ‘template’
 1484 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1495:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1252:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1252:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1252:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1252:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1252:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1252:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1252 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1257:5: error: expected initializer before ‘template’
 1257 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1271:38: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                      ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1495:18: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_simd_interface
/usr/include/xtensor/views/xview.hpp:1495:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1495:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1495:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1495:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1495:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1500:5: error: expected initializer before ‘template’
 1500 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1511:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1271:47: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                               has_data_interface
/usr/include/xtensor/views/xview.hpp:1271:75: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1271:80: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                                ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1271:103: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                                                       ^
/usr/include/xtensor/views/xview.hpp:1271:106: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                                                                                          ^~~
/usr/include/xtensor/views/xview.hpp:1271:106: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1271 |         -> const inner_strides_type& requires(has_data_interface_concept<T>and strided_view_concept<CT, S...>) {
      |                                              ~                                                           ^~~
      |                                                                                                          )
/usr/include/xtensor/views/xview.hpp:1280:5: error: expected initializer before ‘template’
 1280 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1298:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1511:18: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_simd_interface
/usr/include/xtensor/views/xview.hpp:1511:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1511:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1511:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1511:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1511:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1517:5: error: expected initializer before ‘template’
 1517 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1679:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1679 |         requires(!is_xslice<T>::value)
      |         ^~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<int, xt::layout_type::row_major> >’:
required from ‘class xt::pyarray<int, xt::layout_type::row_major>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:28:22:   
   28 |         ndarray<int> y = x;
      |                      ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<int, xt::layout_type::row_major> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1298:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1298:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1298:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1298:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1298:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1298:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1298 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1303:5: error: expected initializer before ‘template’
 1303 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1338:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<double, xt::layout_type::row_major> >’:
required from ‘class xt::pyarray<double, xt::layout_type::row_major>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from ‘struct xt::detail::get_slice_type_impl<xt::pyarray<double, xt::layout_type::row_major>, xt::xall_tag>’
/usr/include/xtensor/views/xslice.hpp:950:19:   
  950 |             using type = xall<typename E::size_type>;
      |                   ^~~~
required from ‘auto xt::detail::make_view_impl(E&&, std::index_sequence<__indices ...>, S&& ...) [with E = const xt::pyarray<double, xt::layout_type::row_major>&; long unsigned int ...I = {0, 1}; S = {int, xt::xall_tag}; std::index_sequence<__indices ...> = std::integer_sequence<long unsigned int, 0, 1>]’
/usr/include/xtensor/views/xview.hpp:1801:19:   
 1801 |             using view_type = xview<xtl::closure_type_t<E>, get_slice_type<std::decay_t<E>, S>...>;
      |                   ^~~~~~~~~
required from ‘auto xt::view(E&&, S&& ...) [with E = const pyarray<double, xt::layout_type::row_major>&; S = {int, xall_tag}]’
/usr/include/xtensor/views/xview.hpp:1825:38:   
 1825 |         return detail::make_view_impl(
      |                ~~~~~~~~~~~~~~~~~~~~~~^
 1826 |             std::forward<E>(e),
      |             ~~~~~~~~~~~~~~~~~~~       
 1827 |             std::make_index_sequence<sizeof...(S)>(),
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1828 |             std::forward<S>(slices)...
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~
 1829 |         );
      |         ~                             
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:34:27:   
   34 |         auto v = xt::view (xs, 0, xt::all());
      |                  ~~~~~~~~~^~~~~~~~~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<double, xt::layout_type::row_major> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1338:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1338:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1338:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1338:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1338:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1338:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1338 |         requires(has_data_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1350:5: error: expected initializer before ‘template’
 1350 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1455:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |         ^~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<int> >’:
required from ‘class xt::pyarray<int>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:40:22:   
   40 |         pyarray<int> r
      |                      ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<int> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<int, xt::layout_type::column_major> >’:
required from ‘class xt::pyarray<int, xt::layout_type::column_major>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:53:53:   
   53 |         pyarray<int, xt::layout_type::column_major> c
      |                                                     ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<int, xt::layout_type::column_major> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1455:18: error: ‘has_data_interface_concept’ was not declared in this scope; did you mean ‘has_data_interface’? [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_data_interface
/usr/include/xtensor/views/xview.hpp:1455:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1455:52: error: label ‘contiguous_view_concept’ referenced outside of any function [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1455:77: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                                                             ^
/usr/include/xtensor/views/xview.hpp:1455:80: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                                                                                ^~~
/usr/include/xtensor/views/xview.hpp:1455:80: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1455 |         requires(has_data_interface_concept<T> and contiguous_view_concept<E, S...>)
      |                 ~                                                              ^~~
      |                                                                                )
/usr/include/xtensor/views/xview.hpp:1462:5: error: expected initializer before ‘template’
 1462 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1479:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pyarray<double> >’:
required from ‘class xt::pyarray<double>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:137:11:   
  137 |     class pyarray : public pycontainer<pyarray<T, L>>,
      |           ^~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:124:35:   
  124 |         auto arr = pyarray<double>::from_shape({5, 2, 6});
      |                                   ^~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pyarray<double> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1479:18: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_simd_interface
/usr/include/xtensor/views/xview.hpp:1479:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1479:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1479:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1479:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1479:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1479 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1484:5: error: expected initializer before ‘template’
 1484 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1495:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1495:18: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_simd_interface
/usr/include/xtensor/views/xview.hpp:1495:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1495:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1495:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1495:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1495:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1495 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1500:5: error: expected initializer before ‘template’
 1500 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1511:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |         ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1511:18: error: ‘has_simd_interface_concept’ was not declared in this scope; did you mean ‘has_simd_interface’? [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                  has_simd_interface
/usr/include/xtensor/views/xview.hpp:1511:46: error: expected primary-expression before ‘>’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                              ^
/usr/include/xtensor/views/xview.hpp:1511:52: error: label ‘strided_view_concept’ referenced outside of any function [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                    ^~~~~~~~~~~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp:1511:75: error: expected primary-expression before ‘,’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                           ^
/usr/include/xtensor/views/xview.hpp:1511:78: error: expected primary-expression before ‘...’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                                                                              ^~~
/usr/include/xtensor/views/xview.hpp:1511:78: error: expected ‘)’ before ‘...’ token [-Wtemplate-body]
 1511 |         requires(has_simd_interface_concept<T> and strided_view_concept<CT, S...>)
      |                 ~                                                            ^~~
      |                                                                              )
/usr/include/xtensor/views/xview.hpp:1517:5: error: expected initializer before ‘template’
 1517 |     template <class CT, class... S>
      |     ^~~~~~~~
/usr/include/xtensor/views/xview.hpp:1679:9: error: ‘requires’ only available with ‘-std=c++20’ or ‘-fconcepts’ [-Wtemplate-body]
 1679 |         requires(!is_xslice<T>::value)
      |         ^~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<int, 3> >’:
required from ‘class xt::pytensor<int, 3>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:25:26:   
   25 |         pytensor<int, 3> t
      |                          ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<int, 3> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<double, 3> >’:
required from ‘class xt::pytensor<double, 3>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:58:39:   
   58 |         auto arr = pytensor<double, 3>::from_shape({5, 2, 6});
      |                                       ^~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<double, 3> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<double, 0> >’:
required from ‘class xt::pytensor<double, 0>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:71:37:   
   71 |         auto a = pytensor<double, 0>::from_shape(shape);
      |                                     ^~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<double, 0> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<int, 2> >’:
required from ‘class xt::pytensor<int, 2>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:175:26:   
  175 |         pytensor<int, 2> c = a1 + a2;
      |                          ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<int, 2> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<int, 4> >’:
required from ‘class xt::pytensor<int, 4>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:212:26:   
  212 |         pytensor<int, 4> a;
      |                          ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<int, 4> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<int, 3, xt::layout_type::row_major> >’:
required from ‘class xt::pytensor<int, 3, xt::layout_type::row_major>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:222:50:   
  222 |         pytensor<int, 3, layout_type::row_major> c;
      |                                                  ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<int, 3, xt::layout_type::row_major> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<int, 1> >’:
required from ‘class xt::pytensor<int, 1>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:248:30:   
  248 |         xt::pytensor<int, 1> arr = xt::zeros<int>({ 10 });
      |                              ^~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<int, 1> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp: In instantiation of ‘class xt::pycontainer<xt::pytensor<double, 1> >’:
required from ‘class xt::pytensor<double, 1>’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pytensor.hpp:163:11:   
  163 |     class pytensor : public pycontainer<pytensor<T, N, L>>,
      |           ^~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:267:29:   
  267 |         pytensor<double, 1> a = { 1.0, 2.0, 3.0 };
      |                             ^
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pycontainer.hpp:55:11: warning: ‘xt::pycontainer<xt::pytensor<double, 1> >’ declared with greater visibility than its base ‘pybind11::object’ [-Wattributes]
   55 |     class pycontainer : public pybind11::object,
      |           ^~~~~~~~~~~
/usr/include/xtensor/views/xview.hpp: In instantiation of ‘xt::xview<CT, S>::size_type xt::xview<CT, S>::sliced_access(const T&, Args ...) const [with typename std::decay<_Tp>::type::size_type I = 0; T = xt::xall<long unsigned int>; Args = {long unsigned int}; CT = const xt::pyarray<double, xt::layout_type::row_major>&; S = {int, xt::xall<long unsigned int>}; size_type = long unsigned int]’:
required from ‘xt::xview<CT, S>::size_type xt::xview<CT, S>::index(Args ...) const [with typename std::decay<_Tp>::type::size_type I = 1; Args = {long unsigned int}; CT = const xt::pyarray<double, xt::layout_type::row_major>&; S = {int, xt::xall<long unsigned int>}; size_type = long unsigned int]’
/usr/include/xtensor/views/xview.hpp:1648:105:   
 1648 |             return sliced_access<I - integral_count_before<S...>(I) + newaxis_count_before<S...>(I + 1)>(
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
 1649 |                 std::get<I + newaxis_count_before<S...>(I + 1)>(m_slices),
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                               
 1650 |                 args...
      |                 ~~~~~~~                                                                                  
 1651 |             );
      |             ~                                                                                            
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::access_impl(std::index_sequence<I ...>, Args ...) [with typename std::decay<_Tp>::type::size_type ...I = {0, 1}; Args = {long unsigned int}; CT = const xt::pyarray<double, xt::layout_type::row_major>&; S = {int, xt::xall<long unsigned int>}; reference = const double&; std::index_sequence<I ...> = std::integer_sequence<long unsigned int, 0, 1>]’
/usr/include/xtensor/views/xview.hpp:1632:28:   
 1632 |         return m_e(index<I>(args...)...);
      |                    ~~~~~~~~^~~~~~~~~
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::access(Arg, Args ...) [with Arg = long unsigned int; Args = {}; CT = const xt::pyarray<double, xt::layout_type::row_major>&; S = {int, xt::xall<long unsigned int>}; reference = const double&]’
/usr/include/xtensor/views/xview.hpp:1593:27:   
 1593 |         return access_impl(make_index_sequence(arg, args...), arg, args...);
      |                ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::operator()(Args ...) [with Args = {int}; CT = const xt::pyarray<double, xt::layout_type::row_major>&; S = {int, xt::xall<long unsigned int>}; reference = const double&]’
/usr/include/xtensor/views/xview.hpp:1039:22:   
 1039 |         return access(static_cast<size_type>(args)...);
      |                ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:35:17:   
   35 |         return v(0);
      |                ~^~~
/usr/include/xtensor/views/xview.hpp:1681:16: error: invalid ‘static_cast’ from type ‘const xt::xall<long unsigned int>’ to type ‘xt::xview<const xt::pyarray<double, xt::layout_type::row_major>&, int, xt::xall<long unsigned int> >::size_type’ {aka ‘long unsigned int’}
 1681 |         return static_cast<size_type>(squeeze);
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/xtensor/utils/xexception.hpp:21,
                 from /usr/include/xtensor/containers/xstorage.hpp:22:
/usr/include/xtl/xsequence.hpp: In instantiation of ‘static auto xtl::detail::sequence_forwarder_impl<R, A, std::void_t<decltype (declval<R>().resize(std::declval<long unsigned int>()))> >::forward(const T&) [with T = xt::xbuffer_adaptor<long unsigned int*>; R = xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>; A = xt::xbuffer_adaptor<long unsigned int*>]’:
required from ‘decltype(auto) xtl::forward_sequence(typename std::remove_reference<_Arg>::type&) [with R = xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>; A = const xt::xbuffer_adaptor<long unsigned int*>&; typename std::remove_reference<_Arg>::type = const xt::xbuffer_adaptor<long unsigned int*>]’
/usr/include/xtl/xsequence.hpp:166:34:   
  166 |         return forwarder::forward(std::forward<A>(s));
      |                ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
required from ‘xt::xiterator<St, S, L>::xiterator(St, shape_param_type, bool) [with St = xt::xstepper<xt::pyarray<int> >; S = xt::xbuffer_adaptor<long unsigned int*>*; xt::layout_type L = xt::layout_type::row_major; shape_param_type = const xt::xbuffer_adaptor<long unsigned int*>*]’
/usr/include/xtensor/core/xiterator.hpp:1089:79:   
 1089 |               end_index ? xtl::forward_sequence<index_type, const shape_type&>(this->shape())
      |                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
required from ‘xt::xiterable<D>::layout_iterator<L> xt::xiterable<D>::get_begin(bool) [with xt::layout_type L = xt::layout_type::row_major; D = xt::pyarray<int>; layout_iterator<L> = xt::xiterator<xt::xstepper<xt::pyarray<int> >, xt::xbuffer_adaptor<long unsigned int*>*, xt::layout_type::row_major>]’
/usr/include/xtensor/core/xiterable.hpp:877:16:   
  877 |         return layout_iterator<L>(get_stepper_begin(this->get_shape()), &(this->get_shape()), end_index);
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from ‘xt::xiterable<D>::layout_iterator<L> xt::xiterable<D>::begin() [with xt::layout_type L = xt::layout_type::row_major; D = xt::pyarray<int>; layout_iterator<L> = xt::xiterator<xt::xstepper<xt::pyarray<int> >, xt::xbuffer_adaptor<long unsigned int*>*, xt::layout_type::row_major>]’
/usr/include/xtensor/core/xiterable.hpp:759:28:   
  759 |         return get_begin<L>(false);
      |                ~~~~~~~~~~~~^~~~~~~
required from ‘xt::xcontiguous_iterable<D>::select_iterator<L> xt::xcontiguous_iterable<D>::begin() [with xt::layout_type L = xt::layout_type::row_major; D = xt::pyarray<int>; select_iterator<L> = xt::xiterator<xt::xstepper<xt::pyarray<int> >, xt::xbuffer_adaptor<long unsigned int*>*, xt::layout_type::row_major>]’
/usr/include/xtensor/core/xiterable.hpp:957:52:   
  957 |             return iterable_base::template begin<L>();
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
required from ‘xt::pyarray<T, L>::pyarray(xt::nested_initializer_list_t<T, 3>) [with T = int; xt::layout_type L = xt::layout_type::dynamic; xt::nested_initializer_list_t<T, 3> = std::initializer_list<std::initializer_list<std::initializer_list<int> > >]’
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/include/xtensor-python/pyarray.hpp:286:131:   
  286 |         L == layout_type::row_major ? nested_copy(m_storage.begin(), t) : nested_copy(this->template begin<layout_type::row_major>(), t);
      |                                                                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:46:26:   
   46 |             {15, 16, 17}}};
      |                          ^
/usr/include/xtl/xsequence.hpp:135:24: error: no matching function for call to ‘xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>::svector(xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator, xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator)’
  135 |                 return R(std::begin(r), std::end(r));
      |                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  • there are 9 candidates
    • candidate 1: ‘xt::svector<T, N, A, Init>::svector(size_type, const value_type&, const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; size_type = long unsigned int; value_type = long unsigned int; allocator_type = std::allocator<long unsigned int>]’ (near match)
      /usr/include/xtensor/containers/xstorage.hpp:829:12:
        829 |     inline svector<T, N, A, Init>::svector(size_type n, const value_type& v, const allocator_type& alloc)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • conversion of argument 2 would be ill-formed:
      • error: invalid conversion from ‘xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator’ {aka ‘const long unsigned int*’} to ‘xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>::value_type’ {aka ‘long unsigned int’} [-fpermissive]
        /usr/include/xtl/xsequence.hpp:135:49:
          135 |                 return R(std::begin(r), std::end(r));
              |                                         ~~~~~~~~^~~
              |                                                 |
              |                                                 xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator {aka const long unsigned int*}
    • candidate 2: ‘xt::svector<T, N, A, Init>::svector(size_type, const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; size_type = long unsigned int; allocator_type = std::allocator<long unsigned int>]’
      /usr/include/xtensor/containers/xstorage.hpp:792:12:
        792 |     inline svector<T, N, A, Init>::svector(size_type n, const allocator_type& alloc)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • no known conversion for argument 2 from ‘xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator’ {aka ‘const long unsigned int*’} to ‘const xt::svector<long unsigned int, 4, std::allocator<long unsigned int>, true>::allocator_type&’ {aka ‘const std::allocator<long unsigned int>&’}
        /usr/include/xtensor/containers/xstorage.hpp:792:79:
          792 |     inline svector<T, N, A, Init>::svector(size_type n, const allocator_type& alloc)
              |                                                         ~~~~~~~~~~~~~~~~~~~~~~^~~~~
    • candidate 3: ‘template<long unsigned int N2, bool I2> xt::svector<T, N, A, Init>::svector(const xt::svector<T, N2, A, I2>&) [with long unsigned int N2 = N2; bool I2 = I2; T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:674:18:
        674 |         explicit svector(const svector<T, N2, A, I2>& rhs)
            |                  ^~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 4: ‘xt::svector<T, N, A, Init>::svector(xt::svector<T, N, A, Init>&&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:895:12:
        895 |     inline svector<T, N, A, Init>::svector(svector&& rhs
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 5: ‘xt::svector<T, N, A, Init>::svector(const xt::svector<T, N, A, Init>&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:886:12:
        886 |     inline svector<T, N, A, Init>::svector(const svector& rhs)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 6: ‘xt::svector<T, N, A, Init>::svector(const std::vector<T>&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:823:12:
        823 |     inline svector<T, N, A, Init>::svector(const std::vector<T>& vec)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 7: ‘xt::svector<T, N, A, Init>::svector(std::initializer_list<_Tp>, const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; allocator_type = std::allocator<long unsigned int>]’
      /usr/include/xtensor/containers/xstorage.hpp:836:12:
        836 |     inline svector<T, N, A, Init>::svector(std::initializer_list<T> il, const allocator_type& alloc)
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • no known conversion for argument 1 from ‘xt::xbuffer_adaptor_base<xt::xbuffer_adaptor<long unsigned int*> >::const_iterator’ {aka ‘const long unsigned int*’} to ‘std::initializer_list<long unsigned int>’
        /usr/include/xtensor/containers/xstorage.hpp:836:69:
          836 |     inline svector<T, N, A, Init>::svector(std::initializer_list<T> il, const allocator_type& alloc)
              |                                            ~~~~~~~~~~~~~~~~~~~~~~~~~^~
    • candidate 8: ‘xt::svector<T, N, A, Init>::svector(const allocator_type&) [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true; allocator_type = std::allocator<long unsigned int>]’
      /usr/include/xtensor/containers/xstorage.hpp:786:12:
        786 |     inline svector<T, N, A, Init>::svector(const allocator_type& alloc) noexcept
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 1 argument, 2 provided
    • candidate 9: ‘xt::svector<T, N, A, Init>::svector() [with T = long unsigned int; long unsigned int N = 4; A = std::allocator<long unsigned int>; bool Init = true]’
      /usr/include/xtensor/containers/xstorage.hpp:780:12:
        780 |     inline svector<T, N, A, Init>::svector() noexcept
            |            ^~~~~~~~~~~~~~~~~~~~~~
      • candidate expects 0 arguments, 2 provided
/usr/include/xtensor/views/xview.hpp: In instantiation of ‘xt::xview<CT, S>::size_type xt::xview<CT, S>::sliced_access(const T&, Args ...) const [with typename std::decay<_Tp>::type::size_type I = 0; T = xt::xall<long unsigned int>; Args = {long unsigned int}; CT = xt::pyarray<int>&; S = {xt::xall<long unsigned int>}; size_type = long unsigned int]’:
required from ‘xt::xview<CT, S>::size_type xt::xview<CT, S>::index(Args ...) const [with typename std::decay<_Tp>::type::size_type I = 0; Args = {long unsigned int}; CT = xt::pyarray<int>&; S = {xt::xall<long unsigned int>}; size_type = long unsigned int]’
/usr/include/xtensor/views/xview.hpp:1648:105:   
 1648 |             return sliced_access<I - integral_count_before<S...>(I) + newaxis_count_before<S...>(I + 1)>(
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
 1649 |                 std::get<I + newaxis_count_before<S...>(I + 1)>(m_slices),
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                               
 1650 |                 args...
      |                 ~~~~~~~                                                                                  
 1651 |             );
      |             ~                                                                                            
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::access_impl(std::index_sequence<I ...>, Args ...) [with typename std::decay<_Tp>::type::size_type ...I = {0}; Args = {long unsigned int}; CT = xt::pyarray<int>&; S = {xt::xall<long unsigned int>}; reference = int&; std::index_sequence<I ...> = std::integer_sequence<long unsigned int, 0>]’
/usr/include/xtensor/views/xview.hpp:1632:28:   
 1632 |         return m_e(index<I>(args...)...);
      |                    ~~~~~~~~^~~~~~~~~
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::access(Arg, Args ...) [with Arg = long unsigned int; Args = {}; CT = xt::pyarray<int>&; S = {xt::xall<long unsigned int>}; reference = int&]’
/usr/include/xtensor/views/xview.hpp:1593:27:   
 1593 |         return access_impl(make_index_sequence(arg, args...), arg, args...);
      |                ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::operator()(Args ...) [with Args = {int}; CT = xt::pyarray<int>&; S = {xt::xall<long unsigned int>}; reference = int&]’
/usr/include/xtensor/views/xview.hpp:1039:22:   
 1039 |         return access(static_cast<size_type>(args)...);
      |                ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pyarray.cpp:328:9:   
  328 |         EXPECT_EQ(v(0), 0.);
      |                   ~^~~
/usr/include/xtensor/views/xview.hpp:1681:16: error: invalid ‘static_cast’ from type ‘const xt::xall<long unsigned int>’ to type ‘xt::xview<xt::pyarray<int>&, xt::xall<long unsigned int> >::size_type’ {aka ‘long unsigned int’}
 1681 |         return static_cast<size_type>(squeeze);
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gmake[2]: *** [test/CMakeFiles/test_xtensor_python.dir/build.make:96: test/CMakeFiles/test_xtensor_python.dir/test_pyarray.cpp.o] Error 1
/usr/include/xtensor/views/xview.hpp: In instantiation of ‘xt::xview<CT, S>::size_type xt::xview<CT, S>::sliced_access(const T&, Args ...) const [with typename std::decay<_Tp>::type::size_type I = 0; T = xt::xall<long unsigned int>; Args = {long unsigned int}; CT = xt::pytensor<int, 1>&; S = {xt::xall<long unsigned int>}; size_type = long unsigned int]’:
required from ‘xt::xview<CT, S>::size_type xt::xview<CT, S>::index(Args ...) const [with typename std::decay<_Tp>::type::size_type I = 0; Args = {long unsigned int}; CT = xt::pytensor<int, 1>&; S = {xt::xall<long unsigned int>}; size_type = long unsigned int]’
/usr/include/xtensor/views/xview.hpp:1648:105:   
 1648 |             return sliced_access<I - integral_count_before<S...>(I) + newaxis_count_before<S...>(I + 1)>(
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
 1649 |                 std::get<I + newaxis_count_before<S...>(I + 1)>(m_slices),
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                               
 1650 |                 args...
      |                 ~~~~~~~                                                                                  
 1651 |             );
      |             ~                                                                                            
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::access_impl(std::index_sequence<I ...>, Args ...) [with typename std::decay<_Tp>::type::size_type ...I = {0}; Args = {long unsigned int}; CT = xt::pytensor<int, 1>&; S = {xt::xall<long unsigned int>}; reference = int&; std::index_sequence<I ...> = std::integer_sequence<long unsigned int, 0>]’
/usr/include/xtensor/views/xview.hpp:1632:28:   
 1632 |         return m_e(index<I>(args...)...);
      |                    ~~~~~~~~^~~~~~~~~
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::access(Arg, Args ...) [with Arg = long unsigned int; Args = {}; CT = xt::pytensor<int, 1>&; S = {xt::xall<long unsigned int>}; reference = int&]’
/usr/include/xtensor/views/xview.hpp:1593:27:   
 1593 |         return access_impl(make_index_sequence(arg, args...), arg, args...);
      |                ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from ‘xt::xview<CT, S>::reference xt::xview<CT, S>::operator()(Args ...) [with Args = {int}; CT = xt::pytensor<int, 1>&; S = {xt::xall<long unsigned int>}; reference = int&]’
/usr/include/xtensor/views/xview.hpp:1039:22:   
 1039 |         return access(static_cast<size_type>(args)...);
      |                ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
required from here
/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/test/test_pytensor.cpp:250:9:   
  250 |         EXPECT_EQ(v(0), 0.);
      |                   ~^~~
/usr/include/xtensor/views/xview.hpp:1681:16: error: invalid ‘static_cast’ from type ‘const xt::xall<long unsigned int>’ to type ‘xt::xview<xt::pytensor<int, 1>&, xt::xall<long unsigned int> >::size_type’ {aka ‘long unsigned int’}
 1681 |         return static_cast<size_type>(squeeze);
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gmake[2]: *** [test/CMakeFiles/test_xtensor_python.dir/build.make:110: test/CMakeFiles/test_xtensor_python.dir/test_pyarray_traits.cpp.o] Error 1
gmake[2]: *** [test/CMakeFiles/test_xtensor_python.dir/build.make:124: test/CMakeFiles/test_xtensor_python.dir/test_pytensor.cpp.o] Error 1
gmake[2]: Leaving directory '/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build'
gmake[1]: Leaving directory '/builddir/build/BUILD/xtensor-python-0.28.0-build/xtensor-python-0.28.0/redhat-linux-build'
gmake[1]: *** [CMakeFiles/Makefile2:134: test/CMakeFiles/test_xtensor_python.dir/all] Error 2
gmake: *** [Makefile:139: all] Error 2

error: Bad exit status from /var/tmp/rpm-tmp.it9o8i (%build)
    Bad exit status from /var/tmp/rpm-tmp.it9o8i (%build)

RPM build errors:
Finish: rpmbuild xtensor-python-0.28.0-2.fc45.src.rpm
Finish: build phase for xtensor-python-0.28.0-2.fc45.src.rpm
INFO: chroot_scan: 1 files copied to /var/lib/copr-rpmbuild/results/chroot_scan
INFO: /var/lib/mock/fedora-rawhide-x86_64-1770904388.326455/root/var/log/dnf5.log
INFO: chroot_scan: creating tarball /var/lib/copr-rpmbuild/results/chroot_scan.tar.gz
/bin/tar: Removing leading `/' from member names
ERROR: Exception(/var/lib/copr-rpmbuild/results/xtensor-python-0.28.0-2.fc45.src.rpm) Config(fedora-rawhide-x86_64) 0 minutes 44 seconds
INFO: Results and/or logs in: /var/lib/copr-rpmbuild/results
INFO: Cleaning up build root ('cleanup_on_failure=True')
Start: clean chroot
INFO: unmounting tmpfs.
Finish: clean chroot
ERROR: Command failed: 
 # /usr/bin/systemd-nspawn -q -M 817ce13e467047ca918f0444972c0779 -D /var/lib/mock/fedora-rawhide-x86_64-1770904388.326455/root -a -u mockbuild --capability=cap_ipc_lock --capability=cap_ipc_lock --bind=/tmp/mock-resolv.wv5v4q2_:/etc/resolv.conf --bind=/dev/btrfs-control --bind=/dev/mapper/control --bind=/dev/fuse --bind=/dev/loop-control --bind=/dev/loop0 --bind=/dev/loop1 --bind=/dev/loop2 --bind=/dev/loop3 --bind=/dev/loop4 --bind=/dev/loop5 --bind=/dev/loop6 --bind=/dev/loop7 --bind=/dev/loop8 --bind=/dev/loop9 --bind=/dev/loop10 --bind=/dev/loop11 --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin '--setenv=PROMPT_COMMAND=printf "\033]0;<mock-chroot>\007"' '--setenv=PS1=<mock-chroot> \s-\v\$ ' --setenv=LANG=C.UTF-8 --resolv-conf=off bash --login -c '/usr/bin/rpmbuild -bb  --target x86_64 --nodeps /builddir/build/originals/xtensor-python.spec'

Copr build error: Build failed