(not at the head of any monitored branch or PR)
2026-04-13 14:35.51: New job: test class_group_vdf.0.0.3 with dune.3.22.2, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29704/head (3e0c395e7b1393a792367f8edca3654dac71e6fd)
                              on debian-13-ocaml-4.14/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29704/head" && git reset --hard 3e0c395e
git fetch origin master
git merge --no-edit 6a41074e987f45580dd8672b99e1d9355175a27f
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-4.14@sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn dune.3.22.2 3.22.2
RUN opam reinstall dune.3.22.2; \
    res=$?; \
    test "$res" != 31 && exit "$res"; \
    export OPAMCLI=2.0; \
    build_dir=$(opam var prefix)/.opam-switch/build; \
    failed=$(ls "$build_dir"); \
    partial_fails=""; \
    for pkg in $failed; do \
    if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"debian-13\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'dune.3.22.2' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1
RUN opam reinstall class_group_vdf.0.0.3; \
    res=$?; \
    test "$res" != 31 && exit "$res"; \
    export OPAMCLI=2.0; \
    build_dir=$(opam var prefix)/.opam-switch/build; \
    failed=$(ls "$build_dir"); \
    partial_fails=""; \
    for pkg in $failed; do \
    if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"debian-13\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'class_group_vdf.0.0.3' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1
RUN (opam reinstall --with-test class_group_vdf.0.0.3) || true
RUN opam reinstall --with-test --verbose class_group_vdf.0.0.3; \
    res=$?; \
    test "$res" != 31 && exit "$res"; \
    export OPAMCLI=2.0; \
    build_dir=$(opam var prefix)/.opam-switch/build; \
    failed=$(ls "$build_dir"); \
    partial_fails=""; \
    for pkg in $failed; do \
    if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"debian-13\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'class_group_vdf.0.0.3' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1

END-OF-DOCKERFILE
docker build -f ../Dockerfile .

2026-04-13 14:35.51: Using cache hint "ocaml/opam:debian-13-ocaml-4.14@sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126-dune.3.22.2-class_group_vdf.0.0.3-3e0c395e7b1393a792367f8edca3654dac71e6fd"
2026-04-13 14:35.51: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-4.14@sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
 (run (network host)
      (shell "opam init --reinit --config .opamrc-sandbox -ni"))
 (run (shell "opam option solver=builtin-0install && opam config report"))
 (env OPAMDOWNLOADJOBS 1)
 (env OPAMERRLOGLEN 0)
 (env OPAMPRECISETRACKING 1)
 (env CI true)
 (env OPAM_REPO_CI true)
 (run (shell "rm -rf opam-repository/"))
 (copy (src .) (dst opam-repository/))
 (run (shell "opam repository set-url --strict default opam-repository/"))
 (run (network host)
      (shell "opam update --depexts || true"))
 (run (shell "opam pin add -k version -yn dune.3.22.2 3.22.2"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall dune.3.22.2;\
             \n        res=$?;\
             \n        test \"$res\" != 31 && exit \"$res\";\
             \n        export OPAMCLI=2.0;\
             \n        build_dir=$(opam var prefix)/.opam-switch/build;\
             \n        failed=$(ls \"$build_dir\");\
             \n        partial_fails=\"\";\
             \n        for pkg in $failed; do\
             \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"debian-13\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'dune.3.22.2' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall class_group_vdf.0.0.3;\
             \n        res=$?;\
             \n        test \"$res\" != 31 && exit \"$res\";\
             \n        export OPAMCLI=2.0;\
             \n        build_dir=$(opam var prefix)/.opam-switch/build;\
             \n        failed=$(ls \"$build_dir\");\
             \n        partial_fails=\"\";\
             \n        for pkg in $failed; do\
             \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"debian-13\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'class_group_vdf.0.0.3' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
 (run (network host)
      (shell "(opam reinstall --with-test class_group_vdf.0.0.3) || true"))
 (run (shell  "opam reinstall --with-test --verbose class_group_vdf.0.0.3;\
             \n        res=$?;\
             \n        test \"$res\" != 31 && exit \"$res\";\
             \n        export OPAMCLI=2.0;\
             \n        build_dir=$(opam var prefix)/.opam-switch/build;\
             \n        failed=$(ls \"$build_dir\");\
             \n        partial_fails=\"\";\
             \n        for pkg in $failed; do\
             \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"debian-13\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'class_group_vdf.0.0.3' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-04-13 14:35.51: Waiting for resource in pool OCluster
2026-04-13 14:44.29: Waiting for worker…
2026-04-13 14:48.36: Got resource from pool OCluster
Building on asteria.caelum.ci.dev
All commits already cached
HEAD is now at 6a41074e98 Merge pull request #29690 from paurkedal/caqti.2.3.0
Merge made by the 'ort' strategy.
 packages/chrome-trace/chrome-trace.3.22.2/opam     | 39 +++++++++++
 .../dune-action-plugin.3.22.2/opam                 | 52 +++++++++++++++
 .../dune-action-trace.3.22.2/opam                  | 39 +++++++++++
 .../dune-build-info/dune-build-info.3.22.2/opam    | 45 +++++++++++++
 .../dune-configurator.3.22.2/opam                  | 49 ++++++++++++++
 packages/dune-glob/dune-glob.3.22.2/opam           | 42 ++++++++++++
 .../dune-private-libs.3.22.2/opam                  | 50 +++++++++++++++
 packages/dune-rpc-lwt/dune-rpc-lwt.3.22.2/opam     | 41 ++++++++++++
 packages/dune-rpc/dune-rpc.3.22.2/opam             | 44 +++++++++++++
 packages/dune-site/dune-site.3.22.2/opam           | 37 +++++++++++
 packages/dune/dune.3.22.2/opam                     | 75 ++++++++++++++++++++++
 packages/dyn/dyn.3.22.2/opam                       | 40 ++++++++++++
 packages/fs-io/fs-io.3.22.2/opam                   | 39 +++++++++++
 packages/ocamlc-loc/ocamlc-loc.3.22.2/opam         | 43 +++++++++++++
 packages/ordering/ordering.3.22.2/opam             | 38 +++++++++++
 packages/stdune/stdune.3.22.2/opam                 | 46 +++++++++++++
 packages/top-closure/top-closure.3.22.2/opam       | 38 +++++++++++
 packages/xdg/xdg.3.22.2/opam                       | 39 +++++++++++
 18 files changed, 796 insertions(+)
 create mode 100644 packages/chrome-trace/chrome-trace.3.22.2/opam
 create mode 100644 packages/dune-action-plugin/dune-action-plugin.3.22.2/opam
 create mode 100644 packages/dune-action-trace/dune-action-trace.3.22.2/opam
 create mode 100644 packages/dune-build-info/dune-build-info.3.22.2/opam
 create mode 100644 packages/dune-configurator/dune-configurator.3.22.2/opam
 create mode 100644 packages/dune-glob/dune-glob.3.22.2/opam
 create mode 100644 packages/dune-private-libs/dune-private-libs.3.22.2/opam
 create mode 100644 packages/dune-rpc-lwt/dune-rpc-lwt.3.22.2/opam
 create mode 100644 packages/dune-rpc/dune-rpc.3.22.2/opam
 create mode 100644 packages/dune-site/dune-site.3.22.2/opam
 create mode 100644 packages/dune/dune.3.22.2/opam
 create mode 100644 packages/dyn/dyn.3.22.2/opam
 create mode 100644 packages/fs-io/fs-io.3.22.2/opam
 create mode 100644 packages/ocamlc-loc/ocamlc-loc.3.22.2/opam
 create mode 100644 packages/ordering/ordering.3.22.2/opam
 create mode 100644 packages/stdune/stdune.3.22.2/opam
 create mode 100644 packages/top-closure/top-closure.3.22.2/opam
 create mode 100644 packages/xdg/xdg.3.22.2/opam

(from ocaml/opam:debian-13-ocaml-4.14@sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126)
Unable to find image 'ocaml/opam:debian-13-ocaml-4.14@sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126' locally
docker.io/ocaml/opam@sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126: Pulling from ocaml/opam
Digest: sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126
Status: Downloaded newer image for ocaml/opam@sha256:ec5999d94ff5da2754b2d163583ef868ccaefbaaabbe66412fde8712ae6f5126
2026-04-13 15:00.20 ---> using "d0e330c08fa445d83f06df86dbe749aac73c20b9c3be340824d01a143f189b82" from cache

/: (user (uid 1000) (gid 1000))

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-04-13 15:00.20 ---> using "3ec7ac935151f5277a236626f366bf7f6f18395cb01e6e86eff2abeffc750f69" from cache

/home/opam: (run (network host)
                 (shell "opam init --reinit --config .opamrc-sandbox -ni"))
Configuring from /home/opam/.opamrc-sandbox, then /home/opam/.opamrc, and finally from built-in defaults.
Checking for available remotes: rsync and local, git.
  - you won't be able to use mercurial repositories unless you install the hg command on your system.
  - you won't be able to use darcs repositories unless you install the darcs command on your system.

This version of opam requires an update to the layout of /home/opam/.opam from version 2.0 to version 2.2, which can't be reverted.
You may want to back it up before going further.

Continue? [Y/n] y
[NOTE] The 'jobs' option was reset, its value was 71 and its new value will vary according to the current number of cores on your machine. You can restore the fixed value using:
           opam option jobs=71 --global
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-04-13 15:00.20 ---> using "b5a0847c35501fd963cedc3388b00c999e5617a9db85df5529c240a6fc10a617" from cache

/home/opam: (run (shell "opam option solver=builtin-0install && opam config report"))
Set to 'builtin-0install' the field solver in global configuration
# opam config report
# opam-version         2.5.0
# self-upgrade         no
# system               arch=x86_64 os=linux os-distribution=debian os-version=13
# solver               builtin-0install
# install-criteria     -changed,-count[avoid-version,solution]
# upgrade-criteria     -count[avoid-version,solution]
# jobs                 255
# repositories         1 (version-controlled)
# pinned               1 (version)
# current-switch       4.14
# invariant            ["ocaml-base-compiler" {= "4.14.3"}]
# compiler-packages    ocaml-base-compiler.4.14.3, ocaml-options-vanilla.1
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/4.14/lib/ocaml/stublibs:/home/opam/.opam/4.14/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       4.14.3
2026-04-13 15:00.20 ---> using "28464b62e165a839b63b1c2ae024a4b4fcbe23c1802c3adf881d35db6bc1d4c2" from cache

/home/opam: (env OPAMDOWNLOADJOBS 1)

/home/opam: (env OPAMERRLOGLEN 0)

/home/opam: (env OPAMPRECISETRACKING 1)

/home/opam: (env CI true)

/home/opam: (env OPAM_REPO_CI true)

/home/opam: (run (shell "rm -rf opam-repository/"))
2026-04-13 15:00.20 ---> using "4dfd69403557bd9c8ecec7a8b2fdd9b50feea12943fd8b9150cd347ede8d5f38" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2026-04-13 15:00.20 ---> using "edfc1136fda934d7cb565de13b26830fecc90a7ab0b3857f616327ea2529452b" from cache

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-04-13 15:00.20 ---> using "b0e78c7a2e37b10ad9605e02581a51654b0778194c38cb8fb47cf5dccb0d651f" from cache

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Hit:1 http://deb.debian.org/debian trixie InRelease
- Get:2 http://deb.debian.org/debian trixie-updates InRelease [47.3 kB]
- Get:3 http://deb.debian.org/debian-security trixie-security InRelease [43.4 kB]
- Get:4 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [122 kB]
- Fetched 213 kB in 0s (1721 kB/s)
- Reading package lists...
2026-04-13 15:00.20 ---> using "044cfe461c26a47734ddd2294ed3e29edb1a69aa3837f8ab53eee87e4aaa3c6d" from cache

/home/opam: (run (shell "opam pin add -k version -yn dune.3.22.2 3.22.2"))
dune is now pinned to version 3.22.2
2026-04-13 15:00.20 ---> using "12f72cd8261a737fbe7223f71f57c1e6abfb3d9cd5eae55fb044ffbcd6c001c9" from cache

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall dune.3.22.2;\
                        \n        res=$?;\
                        \n        test \"$res\" != 31 && exit \"$res\";\
                        \n        export OPAMCLI=2.0;\
                        \n        build_dir=$(opam var prefix)/.opam-switch/build;\
                        \n        failed=$(ls \"$build_dir\");\
                        \n        partial_fails=\"\";\
                        \n        for pkg in $failed; do\
                        \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"debian-13\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'dune.3.22.2' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
dune.3.22.2 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 1 package
  - install dune 3.22.2 (pinned)

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved dune.3.22.2  (cached)
-> installed dune.3.22.2
Done.
# To update the current shell environment, run: eval $(opam env)
2026-04-13 15:00.20 ---> using "80da19535b3d415cbd7848b51e46710db4adfd09b8d6835aafee57876f9fae60" from cache

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall class_group_vdf.0.0.3;\
                        \n        res=$?;\
                        \n        test \"$res\" != 31 && exit \"$res\";\
                        \n        export OPAMCLI=2.0;\
                        \n        build_dir=$(opam var prefix)/.opam-switch/build;\
                        \n        failed=$(ls \"$build_dir\");\
                        \n        partial_fails=\"\";\
                        \n        for pkg in $failed; do\
                        \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"debian-13\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'class_group_vdf.0.0.3' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
class_group_vdf.0.0.3 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 8 packages
  - install class_group_vdf 0.0.3
  - install conf-g++        1.0   [required by class_group_vdf]
  - install conf-gmp        5     [required by class_group_vdf]
  - install conf-pkg-config 4     [required by zarith]
  - install integers        0.7.0 [required by class_group_vdf]
  - install ocamlfind       1.9.8 [required by zarith]
  - install stdlib-shims    0.3.0 [required by integers]
  - install zarith          1.14  [required by class_group_vdf]

The following system packages will first need to be installed:
    libgmp-dev pkg-config

<><> Handling external dependencies <><><><><><><><><><><><><><><><><><><><><><>

opam believes some required external dependencies are missing. opam can:
> 1. Run apt-get to install them (may need root/sudo access)
  2. Display the recommended apt-get command and wait while you run it manually (e.g. in another terminal)
  3. Continue anyway, and, upon success, permanently register that this external dependency is present, but not detectable
  4. Abort the installation

[1/2/3/4] 1

+ /usr/bin/sudo "apt-get" "install" "-qq" "-yy" "libgmp-dev" "pkg-config"
- Selecting previously unselected package libgmpxx4ldbl:amd64.
- (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 20623 files and directories currently installed.)
- Preparing to unpack .../0-libgmpxx4ldbl_2%3a6.3.0+dfsg-3_amd64.deb ...
- Unpacking libgmpxx4ldbl:amd64 (2:6.3.0+dfsg-3) ...
- Selecting previously unselected package libgmp-dev:amd64.
- Preparing to unpack .../1-libgmp-dev_2%3a6.3.0+dfsg-3_amd64.deb ...
- Unpacking libgmp-dev:amd64 (2:6.3.0+dfsg-3) ...
- Selecting previously unselected package libpkgconf3:amd64.
- Preparing to unpack .../2-libpkgconf3_1.8.1-4_amd64.deb ...
- Unpacking libpkgconf3:amd64 (1.8.1-4) ...
- Selecting previously unselected package pkgconf-bin.
- Preparing to unpack .../3-pkgconf-bin_1.8.1-4_amd64.deb ...
- Unpacking pkgconf-bin (1.8.1-4) ...
- Selecting previously unselected package pkgconf:amd64.
- Preparing to unpack .../4-pkgconf_1.8.1-4_amd64.deb ...
- Unpacking pkgconf:amd64 (1.8.1-4) ...
- Selecting previously unselected package pkg-config:amd64.
- Preparing to unpack .../5-pkg-config_1.8.1-4_amd64.deb ...
- Unpacking pkg-config:amd64 (1.8.1-4) ...
- Setting up libpkgconf3:amd64 (1.8.1-4) ...
- Setting up libgmpxx4ldbl:amd64 (2:6.3.0+dfsg-3) ...
- Setting up pkgconf-bin (1.8.1-4) ...
- Setting up libgmp-dev:amd64 (2:6.3.0+dfsg-3) ...
- Setting up pkgconf:amd64 (1.8.1-4) ...
- Setting up pkg-config:amd64 (1.8.1-4) ...
- Processing triggers for libc-bin (2.41-12+deb13u2) ...

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved class_group_vdf.0.0.3  (https://opam.ocaml.org/cache)
-> retrieved conf-gmp.5  (cached)
-> retrieved integers.0.7.0  (cached)
-> retrieved ocamlfind.1.9.8  (cached)
-> installed conf-g++.1.0
-> installed conf-gmp.5
-> installed conf-pkg-config.4
-> retrieved stdlib-shims.0.3.0  (cached)
-> retrieved zarith.1.14  (cached)
-> installed stdlib-shims.0.3.0
-> installed integers.0.7.0
-> installed ocamlfind.1.9.8
-> installed zarith.1.14
[ERROR] The compilation of class_group_vdf.0.0.3 failed at "dune build -j 255 -p class_group_vdf @install".

#=== ERROR while compiling class_group_vdf.0.0.3 ==============================#
# context              2.5.0 | linux/x86_64 | ocaml-base-compiler.4.14.3 | file:///home/opam/opam-repository
# path                 ~/.opam/4.14/.opam-switch/build/class_group_vdf.0.0.3
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune build -j 255 -p class_group_vdf @install
# exit-code            1
# env-file             ~/.opam/log/class_group_vdf-7-f61e67.env
# output-file          ~/.opam/log/class_group_vdf-7-f61e67.out
### output ###
# File "src/dune", lines 9-24, characters 0-452:
#  9 | (library
# 10 |  (name class_group_vdf)
# 11 |  (public_name class_group_vdf)
# ....
# 22 |   (flags
# 23 |    (:include stubs_flags.sexp))
# 24 |   (names cg_vdf_wrapper cg_vdf_bindings_stubs)))
# (cd _build/default && /home/opam/.opam/4.14/bin/ocamlmklib.opt -g -o src/class_group_vdf_stubs src/cg_vdf_wrapper.o src/cg_vdf_bindings_stubs.o -ldopt -lgmpxx -ldopt -lgmp -ldopt -lstdc++)
# /usr/bin/ld: src/cg_vdf_wrapper.o: relocation R_X86_64_TPOFF32 against `_ZZ12rand_integeriiE7is_init' can not be used when making a shared object; recompile with -fPIC
# /usr/bin/ld: failed to set dynamic section sizes: bad value
# collect2: error: ld returned 1 exit status



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build class_group_vdf 0.0.3
+- 
+- The following changes have been performed
| - install conf-g++        1.0
| - install conf-gmp        5
| - install conf-pkg-config 4
| - install integers        0.7.0
| - install ocamlfind       1.9.8
| - install stdlib-shims    0.3.0
| - install zarith          1.14
+- 
# To update the current shell environment, run: eval $(opam env)

The former state can be restored with:
    /usr/bin/opam switch import "/home/opam/.opam/4.14/.opam-switch/backup/state-20260413150021.export"
[WARNING] OPAMCONFIRMLEVEL was ignored because CLI 2.0 was requested and it was introduced in 2.1.
[WARNING] OPAMCONFIRMLEVEL was ignored because CLI 2.0 was requested and it was introduced in 2.1.
"/usr/bin/env" "bash" "-c" "opam reinstall class_group_vdf.0.0.3;
        res=$?;
        test "$res" != 31 && exit "$res";
        export OPAMCLI=2.0;
        build_dir=$(opam var prefix)/.opam-switch/build;
        failed=$(ls "$build_dir");
        partial_fails="";
        for pkg in $failed; do
          if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"debian-13\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'class_group_vdf.0.0.3' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 1
2026-04-13 15:00.46: Job failed: Failed: Build failed
2026-04-13 15:00.46: Log analysis:
2026-04-13 15:00.46: >>> 
[ERROR] The compilation of class_group_vdf.0.0.3 failed at "dune build -j 255 -p class_group_vdf @install".
 (score = 20)
2026-04-13 15:00.46: >>> 
# collect2: error: ld returned 1 exit status
 (score = 30)
2026-04-13 15:00.46: ld returned 1 exit status