Build:
  1. 0
2026-02-26 16:51.58: New job: build unionFind.20260226, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29468/head (89d7218ec41529b5d413bc81d51aff12c30be00d)
                              on ubuntu-25.04-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29468/head" && git reset --hard 89d7218e
git fetch origin master
git merge --no-edit 5119fbb0776fa3cd71b09f40a51e40f783c539bf
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:ubuntu-25.04-ocaml-5.4@sha256:42964a28c94119ceebfb31437f8e303d71cb3f5e02083057afd431f7716e32e8
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn unionFind.20260226 20260226
RUN opam reinstall unionFind.20260226; \
    res=$?; \
    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 "\"ubuntu-25.04\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'unionFind.20260226' && partial_fails="$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 .

2026-02-26 16:51.58: Using cache hint "ocaml/opam:ubuntu-25.04-ocaml-5.4@sha256:42964a28c94119ceebfb31437f8e303d71cb3f5e02083057afd431f7716e32e8-unionFind.20260226-89d7218ec41529b5d413bc81d51aff12c30be00d"
2026-02-26 16:51.58: Using OBuilder spec:
((from ocaml/opam:ubuntu-25.04-ocaml-5.4@sha256:42964a28c94119ceebfb31437f8e303d71cb3f5e02083057afd431f7716e32e8)
 (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 unionFind.20260226 20260226"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall unionFind.20260226;\
             \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 \"\\\"ubuntu-25.04\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'unionFind.20260226' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-02-26 16:51.58: Waiting for resource in pool OCluster
2026-02-27 02:05.33: Waiting for worker…
2026-02-27 02:07.22: Got resource from pool OCluster
Building on odawa.caelum.ci.dev
All commits already cached
HEAD is now at 5119fbb077 Merge pull request #29462 from Octachron/OCaml_5.5.0_alpha1
Updating 5119fbb077..89d7218ec4
Fast-forward
 packages/unionFind/unionFind.20260226/opam | 39 ++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 packages/unionFind/unionFind.20260226/opam

(from ocaml/opam:ubuntu-25.04-ocaml-5.4@sha256:42964a28c94119ceebfb31437f8e303d71cb3f5e02083057afd431f7716e32e8)
2026-02-27 02:08.04 ---> saved as "93c2d4b56d2e92deb9dbf5afa2c632e932450b825aed9b51971d5b84cccdfebb"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-02-27 02:08.04 ---> saved as "c81668e99c6c955c63b1ac7a86d01b511ed4ec69e4bf23852161bb0faebce951"

/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
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-02-27 02:08.31 ---> saved as "06e282560724d8babc43cf863e017f9d5027eccb42bc858ebb7f8e6951e8fa1b"

/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=ubuntu os-version=25.04
# 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       5.4
# invariant            ["ocaml-base-compiler" {= "5.4.0"}]
# compiler-packages    ocaml-base-compiler.5.4.0, ocaml-compiler.5.4.0, ocaml-options-vanilla.1
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/5.4/lib/ocaml/stublibs:/home/opam/.opam/5.4/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       5.4.0
2026-02-27 02:08.32 ---> saved as "aba055f6e5877e47273462e28b25d17dbdc58960a443a61c6d4dd119eca405ef"

/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/"))
2026-02-27 02:09.01 ---> saved as "8b12bdd3831d70a2da045d6190011e9d441443896609953d085ea5ce800576d0"

/home/opam: (copy (src .) (dst opam-repository/))
2026-02-27 02:09.22 ---> saved as "a32b566cf0eeaa55e00322350dd06a7f79793cb1daf8dc7b4f0ca3d9e1059242"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-02-27 02:09.39 ---> saved as "628e6973e638efdbd1d75e34d028c8ad8d84af3f970c280902734948f616f6b9"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Hit:1 http://archive.ubuntu.com/ubuntu plucky InRelease
- Hit:2 http://security.ubuntu.com/ubuntu plucky-security InRelease
- Hit:3 http://archive.ubuntu.com/ubuntu plucky-updates InRelease
- Hit:4 http://archive.ubuntu.com/ubuntu plucky-backports InRelease
- Reading package lists...
- 
2026-02-27 02:09.41 ---> saved as "35a14afa8259092c6199b8dbc3125a1371732ebe552042ae7a9d75e4049b2417"

/home/opam: (run (shell "opam pin add -k version -yn unionFind.20260226 20260226"))
unionFind is now pinned to version 20260226
2026-02-27 02:09.41 ---> saved as "7ff60f3b79bb3aaaa37808cc3eacb83a8a61bb37858ca4839e8f0f1dcb5e5fb3"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall unionFind.20260226;\
                        \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 \"\\\"ubuntu-25.04\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'unionFind.20260226' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
unionFind.20260226 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 3 packages
  - install dune      3.21.1            [required by unionFind]
  - install store     0.1               [required by unionFind]
  - install unionFind 20260226 (pinned)

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved dune.3.21.1  (cached)
-> retrieved store.0.1  (cached)
-> retrieved unionFind.20260226  (cached)
-> installed dune.3.21.1
-> installed store.0.1
-> installed unionFind.20260226
Done.
# To update the current shell environment, run: eval $(opam env)
2026-02-27 02:10.04 ---> saved as "dc1a667a5c4741ed3b6fba5d9689e29fedf185562d88ba0554fe420df68265e1"
Job succeeded
2026-02-27 02:10.12: Job succeeded