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 debian-unstable-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29468/head" && git reset --hard 89d7218e
git fetch origin master
git merge --no-edit 5119fbb0776fa3cd71b09f40a51e40f783c539bf
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-unstable-ocaml-5.4@sha256:052f22dabdce2fd49d2657b43d9a8b598f7c630053dc1783ae228858491ae3be
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn unionFind.20260226 20260226
RUN opam reinstall unionFind.20260226; \
    res=$?; \
    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 "\"debian-unstable\""; 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-unstable-ocaml-5.4@sha256:052f22dabdce2fd49d2657b43d9a8b598f7c630053dc1783ae228858491ae3be-unionFind.20260226-89d7218ec41529b5d413bc81d51aff12c30be00d"
2026-02-26 16:51.58: Using OBuilder spec:
((from ocaml/opam:debian-unstable-ocaml-5.4@sha256:052f22dabdce2fd49d2657b43d9a8b598f7c630053dc1783ae228858491ae3be)
 (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 \"\\\"debian-unstable\\\"\"; 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 02:05.42: Waiting for worker…
2026-02-27 02:07.32: 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:debian-unstable-ocaml-5.4@sha256:052f22dabdce2fd49d2657b43d9a8b598f7c630053dc1783ae228858491ae3be)
2026-02-27 02:08.41 ---> saved as "fc5f960075c978ec0e06c84f3560d8c857fd1defcad50daa8249e5300ed026cd"

/: (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 02:08.41 ---> saved as "a7f8c42e1023ddd99516cc6b1dc5b5dd09b982c94c2d9bafb265d941baa4edb3"

/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 02:09.09 ---> saved as "40835c6e6561451717592bb071d803f4abc6eff8c12465b59acc83781bff9a41"

/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=unknown
# 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 02:09.10 ---> saved as "7b5982cab09db920dad7f5c3f06736d0cb94f99f187c29315a802b971a823bb4"

/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 02:09.23 ---> saved as "212109850733c17a00b6ed0a6b4ce46d24fe6b211c30948949a3d5ebbe52a4c7"

/home/opam: (copy (src .) (dst opam-repository/))
2026-02-27 02:09.36 ---> saved as "0ed8ecf8b42e51f7bb573455a237b6576a464e5fd8b7399ce7ac586873fa7482"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-02-27 02:09.53 ---> saved as "9a0ec6ddd6b7f5ea28af9cab3eff5ceeadc10a828973cd2933bd941580d59839"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Get:1 http://deb.debian.org/debian unstable InRelease [187 kB]
- Get:2 http://deb.debian.org/debian unstable/main amd64 Packages.diff/Index [63.6 kB]
- Get:3 http://deb.debian.org/debian unstable/main amd64 Packages T-2026-02-26-2000.23-F-2026-02-14-1403.05.pdiff [984 kB]
- Get:3 http://deb.debian.org/debian unstable/main amd64 Packages T-2026-02-26-2000.23-F-2026-02-14-1403.05.pdiff [984 kB]
- Fetched 1235 kB in 1s (926 kB/s)
- Reading package lists...
2026-02-27 02:09.55 ---> saved as "1ec9dee39498ddf513433311582fc41b0b1cefc87ed5646481b87e0628f88b8a"

/home/opam: (run (shell "opam pin add -k version -yn unionFind.20260226 20260226"))
unionFind is now pinned to version 20260226
2026-02-27 02:09.56 ---> saved as "18c025e38efce1ee64f6de226594627097280c154f4f8e5829c32c22cfe45988"

/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 \"\\\"debian-unstable\\\"\"; 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 02:10.19 ---> saved as "0b1c6b1922bdd592f6d521d54aa5baa11aa87813f225a93975358324e5f95e0d"
Job succeeded
2026-02-27 02:10.25: Job succeeded