(for PR #29222)

2026-01-19 20:51.49: New job: build unionFind.20250818, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29222/head (ad79ca9644feb512edcb7b55f7521e075b88d976)
                              on debian-13-ocaml-4.14-nnpchecker/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29222/head" && git reset --hard ad79ca96
git fetch origin master
git merge --no-edit 1c997ec9e6ebc6ea699547000cb8dfa44e52efaa
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-4.14-nnpchecker@sha256:736bec2df1442c641d954b5fd87c83792928d325d1bfd555fbf9ad415c84786b
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn unionFind.20250818 20250818
RUN opam reinstall unionFind.20250818; \
    res=$?; \
    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 "$pkg" != 'unionFind.20250818' && partial_fails="$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 .

2026-01-19 20:51.49: Using cache hint "ocaml/opam:debian-13-ocaml-4.14-nnpchecker@sha256:736bec2df1442c641d954b5fd87c83792928d325d1bfd555fbf9ad415c84786b-unionFind.20250818-ad79ca9644feb512edcb7b55f7521e075b88d976"
2026-01-19 20:51.49: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-4.14-nnpchecker@sha256:736bec2df1442c641d954b5fd87c83792928d325d1bfd555fbf9ad415c84786b)
 (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.20250818 20250818"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall unionFind.20250818;\
             \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 \"$pkg\" != 'unionFind.20250818' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-01-19 20:51.49: Waiting for resource in pool OCluster
2026-01-20 00:47.50: Waiting for worker…
2026-01-20 00:52.00: Got resource from pool OCluster
Building on laodoke.caelum.ci.dev
All commits already cached
Updating files:  67% (12924/19232)
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Updating files: 100% (19232/19232), done.
HEAD is now at 1c997ec9e6 Merge pull request #29241 from polytypic/release-multicore-magic-2.3.2
Updating 1c997ec9e6..ad79ca9644
Fast-forward
 packages/archetype/archetype.0.1.10/opam                     |  2 +-
 packages/archetype/archetype.0.1.11/opam                     |  2 +-
 packages/archetype/archetype.0.1.12/opam                     |  2 +-
 packages/archetype/archetype.0.1.13/opam                     |  2 +-
 packages/archetype/archetype.0.1.14/opam                     |  2 +-
 packages/archetype/archetype.0.1.3/opam                      |  2 +-
 packages/archetype/archetype.0.1.4/opam                      |  2 +-
 packages/archetype/archetype.0.1.5/opam                      |  2 +-
 packages/archetype/archetype.0.1.6/opam                      |  2 +-
 packages/archetype/archetype.0.1.8/opam                      |  2 +-
 packages/archetype/archetype.0.1.9/opam                      |  2 +-
 packages/archetype/archetype.1.0.0/opam                      |  2 +-
 packages/archetype/archetype.1.1.0/opam                      |  2 +-
 packages/archetype/archetype.1.1.1/opam                      |  2 +-
 packages/archetype/archetype.1.1.2/opam                      |  2 +-
 packages/archetype/archetype.1.2.0/opam                      |  2 +-
 packages/archetype/archetype.1.2.1/opam                      |  2 +-
 packages/archetype/archetype.1.2.10/opam                     |  2 +-
 packages/archetype/archetype.1.2.11/opam                     |  2 +-
 packages/archetype/archetype.1.2.12/opam                     |  2 +-
 packages/archetype/archetype.1.2.13/opam                     |  2 +-
 packages/archetype/archetype.1.2.14/opam                     |  2 +-
 packages/archetype/archetype.1.2.15/opam                     |  2 +-
 packages/archetype/archetype.1.2.16/opam                     |  2 +-
 packages/archetype/archetype.1.2.2/opam                      |  2 +-
 packages/archetype/archetype.1.2.3/opam                      |  2 +-
 packages/archetype/archetype.1.2.4/opam                      |  2 +-
 packages/archetype/archetype.1.2.5/opam                      |  2 +-
 packages/archetype/archetype.1.2.6/opam                      |  2 +-
 packages/archetype/archetype.1.2.7/opam                      |  2 +-
 packages/archetype/archetype.1.2.8/opam                      |  2 +-
 packages/archetype/archetype.1.2.9/opam                      |  2 +-
 packages/archetype/archetype.1.3.0/opam                      |  2 +-
 packages/archetype/archetype.1.3.1/opam                      |  2 +-
 packages/archetype/archetype.1.3.2/opam                      |  2 +-
 packages/archetype/archetype.1.3.3/opam                      |  2 +-
 packages/archetype/archetype.1.3.4/opam                      |  2 +-
 packages/archetype/archetype.1.3.5/opam                      |  2 +-
 packages/archetype/archetype.1.3.6/opam                      |  2 +-
 packages/archetype/archetype.1.4.0/opam                      |  2 +-
 packages/archetype/archetype.1.4.1/opam                      |  2 +-
 packages/archetype/archetype.1.4.2/opam                      |  2 +-
 packages/archetype/archetype.1.4.3/opam                      |  2 +-
 packages/archetype/archetype.1.5.0/opam                      |  2 +-
 packages/archetype/archetype.1.5.1/opam                      |  2 +-
 packages/archetype/archetype.1.5.2/opam                      |  2 +-
 packages/archetype/archetype.1.5.3/opam                      |  2 +-
 packages/bnfgen/bnfgen.4.0.0/opam                            |  2 +-
 packages/catala/catala.0.10.0/opam                           |  2 +-
 packages/catala/catala.0.3.0/opam                            |  2 +-
 packages/catala/catala.0.5.0/opam                            |  2 +-
 packages/catala/catala.0.6.0/opam                            |  2 +-
 packages/catala/catala.0.7.0/opam                            |  2 +-
 packages/catala/catala.0.8.0/opam                            |  2 +-
 packages/catala/catala.0.9.0/opam                            |  2 +-
 packages/catala/catala.1.0.0/opam                            |  2 +-
 packages/catala/catala.1.0.0~alpha/opam                      |  2 +-
 packages/catala/catala.1.0.0~beta/opam                       |  2 +-
 packages/dolmen/dolmen.0.1/opam                              |  2 +-
 packages/dolmen/dolmen.0.10/opam                             |  2 +-
 packages/dolmen/dolmen.0.2/opam                              |  2 +-
 packages/dolmen/dolmen.0.4.1/opam                            |  2 +-
 packages/dolmen/dolmen.0.4/opam                              |  2 +-
 packages/dolmen/dolmen.0.5/opam                              |  2 +-
 packages/dolmen/dolmen.0.6/opam                              |  4 ++--
 packages/dolmen/dolmen.0.7/opam                              |  2 +-
 packages/dolmen/dolmen.0.8.1/opam                            |  2 +-
 packages/dolmen/dolmen.0.8/opam                              |  2 +-
 packages/dolmen/dolmen.0.9/opam                              |  2 +-
 .../embedded_ocaml_templates.0.1.4/opam                      | 12 ++++++------
 .../embedded_ocaml_templates.0.2/opam                        | 12 ++++++------
 .../embedded_ocaml_templates.0.3.1/opam                      |  8 ++++----
 .../embedded_ocaml_templates.0.4/opam                        | 10 +++++-----
 .../embedded_ocaml_templates.0.5.1/opam                      | 10 +++++-----
 .../embedded_ocaml_templates.0.6/opam                        |  2 +-
 .../embedded_ocaml_templates.0.7/opam                        |  2 +-
 packages/morbig/morbig.0.10.3/opam                           |  2 +-
 packages/morbig/morbig.0.10.4/opam                           |  2 +-
 packages/morbig/morbig.0.11.0/opam                           |  2 +-
 packages/morbig/morbig.0.9.1/opam                            |  2 +-
 packages/morbig/morbig.0.9/opam                              |  2 +-
 packages/otoml/otoml.0.9.0/opam                              |  2 +-
 packages/otoml/otoml.0.9.1/opam                              |  2 +-
 packages/otoml/otoml.0.9.2/opam                              |  2 +-
 packages/otoml/otoml.0.9.3/opam                              |  2 +-
 packages/otoml/otoml.1.0.0/opam                              |  2 +-
 packages/otoml/otoml.1.0.1/opam                              |  2 +-
 packages/otoml/otoml.1.0.2/opam                              |  2 +-
 packages/otoml/otoml.1.0.3/opam                              |  2 +-
 packages/otoml/otoml.1.0.4/opam                              |  2 +-
 packages/otoml/otoml.1.0.5/opam                              |  2 +-
 packages/touist/touist.3.0.0/opam                            |  2 +-
 packages/touist/touist.3.1.0/opam                            |  2 +-
 packages/touist/touist.3.2.0/opam                            |  2 +-
 packages/touist/touist.3.2.1/opam                            |  2 +-
 packages/touist/touist.3.5.0/opam                            |  2 +-
 packages/unionFind/unionFind.20250818/opam                   |  2 +-
 97 files changed, 119 insertions(+), 119 deletions(-)

(from ocaml/opam:debian-13-ocaml-4.14-nnpchecker@sha256:736bec2df1442c641d954b5fd87c83792928d325d1bfd555fbf9ad415c84786b)
2026-01-20 00:52.54 ---> saved as "d9c76f8f1abd09098dc7f965d2a2557886df8529161d8084963333462860e386"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-01-20 00:52.54 ---> saved as "110543b9aef8257839d3a43ab52504f2dbd52801313116ba4d4437bfe9fd98b0"

/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
2026-01-20 00:53.22 ---> saved as "35a49a76e4d9835a11dfb2bcdbc6d55062132b145b6a6002d9253f5fe1d559bd"

/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                 71
# repositories         1 (version-controlled)
# pinned               1 (version)
# current-switch       4.14
# invariant            ["ocaml-options-only-nnpchecker"]
# compiler-packages    ocaml-option-nnpchecker.1, ocaml-options-only-nnpchecker.1, ocaml-variants.4.14.2+options
# 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       4.14.2+options
2026-01-20 00:53.23 ---> saved as "a4a54c9c18d48a1d73a2dd084e6769192a4c6057d5f883c4ab5ff393942b0f24"

/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/"))
2026-01-20 00:53.40 ---> saved as "0266f8f9a6652cb612280ff4deffef0bd99be6c8ce1ce18b503eda1602032c8c"

/home/opam: (copy (src .) (dst opam-repository/))
2026-01-20 00:53.58 ---> saved as "2091ea4f45a4e7a2f9377d3dfdff8b0a7233e1476d8b39325a3e5a6fac5f99c5"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-01-20 00:54.19 ---> saved as "3318043c386265457251cb921dd51f9ed284a21b34a0686fa0b9efd997724d50"

/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 [96.1 kB]
- Fetched 187 kB in 0s (1741 kB/s)
- Reading package lists...
- 
2026-01-20 00:54.20 ---> saved as "a46b5f77dda32ec13f9b69bdd0502baf828f73a1a554c637a77626de60dbb648"

/home/opam: (run (shell "opam pin add -k version -yn unionFind.20250818 20250818"))
unionFind is now pinned to version 20250818
2026-01-20 00:54.22 ---> saved as "230c283a89f6ee1a0dc020feb43ed788575d5fffad67b993486e447a0a0c512a"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall unionFind.20250818;\
                        \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 \"$pkg\" != 'unionFind.20250818' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
unionFind.20250818 is not installed. Install it? [Y/n] y
  * No agreement on the version of ocaml:
    - (invariant) -> ocaml-options-only-nnpchecker -> ocaml-option-nnpchecker -> ocaml-variants >= 4.12.0~ -> ocaml = 4.14.2
    - unionFind >= 20250818 -> ocaml >= 5.0.0
    You can temporarily relax the switch invariant with `--update-invariant'
  * Incompatible packages:
    - (invariant) -> ocaml-options-only-nnpchecker -> ocaml-option-nnpchecker -> ocaml-variants >= 4.12.0~
    - unionFind >= 20250818 -> ocaml >= 5.0.0 -> ocaml-base-compiler >= 5.0.0~
  * Missing dependency:
    - unionFind >= 20250818 -> ocaml >= 5.0.0 -> dkml-base-compiler >= 5.4.1~ | ocaml-base-compiler >= 5.4.1~ | ocaml-system >= 5.4.1~ | ocaml-variants >= 5.4.1~
    no matching version
    no matching version
    no matching version
    not available because the package is pinned to version 4.14.2+options

No solution found, exiting
"/usr/bin/env" "bash" "-c" "opam reinstall unionFind.20250818;
        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 "$pkg" != 'unionFind.20250818' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 20
2026-01-20 00:54.46: Job failed: Failed: Build failed
2026-01-20 00:54.46: Log analysis:
2026-01-20 00:54.46: >>> 
No solution found, exiting
 (score = 100)
2026-01-20 00:54.46: [SKIP] Package not available