2026-02-26 16:51.58: New job: build unionFind.20260226, using opam 2.0
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29468/head (89d7218ec41529b5d413bc81d51aff12c30be00d)
                              on debian-13-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29468/head" && git reset --hard 89d7218e
git fetch origin master
git merge --no-edit 5119fbb0776fa3cd71b09f40a51e40f783c539bf
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-5.4@sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-2.0 /usr/bin/opam
RUN opam init --reinit -ni
RUN opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam depext -u || true
RUN opam pin add -k version -yn unionFind.20260226 20260226
RUN opam depext unionFind.20260226 && opam reinstall unionFind.20260226; \
    res=$?; \
    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 "\"debian-13\""; 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:debian-13-ocaml-5.4@sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c-unionFind.20260226-89d7218ec41529b5d413bc81d51aff12c30be00d"
2026-02-26 16:51.58: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.4@sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo ln -f /usr/bin/opam-2.0 /usr/bin/opam"))
 (run (network host)
      (shell "opam init --reinit --config .opamrc-sandbox -ni"))
 (run (shell "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 depext -u || 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 depext unionFind.20260226 && 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 \"\\\"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 \"$pkg\" != 'unionFind.20260226' && partial_fails=\"$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 02:06.08: Waiting for worker…
2026-02-27 02:08.49: Got resource from pool OCluster
Building on eumache
All commits already cached
Updating files:  90% (16607/18328)
Updating files:  91% (16679/18328)
Updating files:  92% (16862/18328)
Updating files:  93% (17046/18328)
Updating files:  94% (17229/18328)
Updating files:  95% (17412/18328)
Updating files:  96% (17595/18328)
Updating files:  97% (17779/18328)
Updating files:  98% (17962/18328)
Updating files:  99% (18145/18328)
Updating files: 100% (18328/18328)
Updating files: 100% (18328/18328), done.
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:debian-13-ocaml-5.4@sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c)
Unable to find image 'ocaml/opam:debian-13-ocaml-5.4@sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c' locally
docker.io/ocaml/opam@sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c: Pulling from ocaml/opam
Digest: sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c
Status: Downloaded newer image for ocaml/opam@sha256:4add1601135529e9f2e403a25c1c640231c0e871e87f88cf8feab4be5095104c
2026-02-27 02:08.51 ---> using "3c18c9e472a4f76bc128dc0a5a1e21158ba3dbd0d6773ace6ec33f0cfe6fac9b" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.0 /usr/bin/opam"))
2026-02-27 02:08.52 ---> saved as "9977b265c0c2169e3d6e1d5fd30288788cef6fa2098b216c383dbe2f2af5d3be"

/home/opam: (run (network host)
                 (shell "opam init --reinit --config .opamrc-sandbox -ni"))
[NOTE] Will configure 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.

[WARNING] Recommended dependencies -- most packages rely on these:
  - m4

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
default (at git+file:///home/opam/opam-repository): 
    [INFO] opam 2.1 and 2.2 include many performance and security improvements over 2.0; please consider upgrading (https://opam.ocaml.org/doc/Install.html)

2026-02-27 02:10.25 ---> saved as "9db4ce202e63f28fbf637045209431c2712a649b3d599ee21c42ca79a8b8f601"

/home/opam: (run (shell "opam config report"))
# opam config report
# opam-version      2.0.10 (adc1e1829a2bef5b240746df80341b508290fe3b) 
# self-upgrade      no
# system            arch=x86_64 os=linux os-distribution=debian os-version=13
# solver            builtin-mccs+glpk
# install-criteria  -removed,-count[version-lag,request],-count[version-lag,changed],-changed
# upgrade-criteria  -removed,-count[version-lag,solution],-new
# jobs              71
# repositories      1 (version-controlled)
# pinned            1 (version)
# current-switch    5.4
2026-02-27 02:10.27 ---> saved as "9d723489c4ffa196e512eaebf98a1efe43ed5b2d8d1bbf1c8e8e385abac1d516"

/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 02:10.38 ---> saved as "faef83b30c7783db3d1569810b91945d51f81e1a6b9da9881987b9c3f598b75f"

/home/opam: (copy (src .) (dst opam-repository/))
2026-02-27 02:10.48 ---> saved as "d137435e67a2460258b0d4767a17e6c49b7767e20668bf90a18ce6855334a325"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
default (at file:///home/opam/opam-repository): 
    [INFO] opam 2.1 and 2.2 include many performance and security improvements over 2.0; please consider upgrading (https://opam.ocaml.org/doc/Install.html)

2026-02-27 02:11.04 ---> saved as "e2a0e38104a51a2744f636ed50bb5bffd51a3d5fcab34fe1a11a7ed24eb88c55"

/home/opam: (run (network host)
                 (shell "opam depext -u || true"))
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
# No extra OS packages requirements found.
# All required OS packages found.
The following command needs to be run through "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 [113 kB]
Fetched 203 kB in 0s (1437 kB/s)
Reading package lists...
# OS package update successful
2026-02-27 02:11.07 ---> saved as "d2d6bf17d29a8dada504ca915487f14e4fa425e46fc2c10941733e03833cfa3e"

/home/opam: (run (shell "opam pin add -k version -yn unionFind.20260226 20260226"))
unionFind is now pinned to version 20260226
2026-02-27 02:11.09 ---> saved as "971d8f01c201b0b8b13472131f9f24a19bd0f33840c23426155092632bec8ce7"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam depext unionFind.20260226 && 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 \"\\\"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 \"$pkg\" != 'unionFind.20260226' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
# No extra OS packages requirements found.
# All required OS packages found.
unionFind.20260226 is not installed. Install it? [Y/n] y
The following actions will be performed:
  - install dune      3.21.1    [required by unionFind]
  - install store     0.1       [required by unionFind]
  - install unionFind 20260226*
===== 3 to install =====

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[dune.3.21.1] found in cache
[store.0.1] found in cache
[unionFind.20260226] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> installed dune.3.21.1
-> installed store.0.1
-> installed unionFind.20260226
Done.
# Run eval $(opam env) to update the current shell environment
2026-02-27 02:11.58 ---> saved as "39564ffec6a6df7c4087d57dfb3d880a4026454b198edf7718a0bddbd71bae7b"
Job succeeded
2026-02-27 02:12.06: Job succeeded