2026-01-27 17:10.05: New job: test lwt.6.1.0, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29295/head (db8e0fb5655c576d3615f37fe2c1579cc1be0040)
                              on centos-10-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29295/head" && git reset --hard db8e0fb5
git fetch origin master
git merge --no-edit 51158b2cc8b1d975be5b32b177da768f0b3357af
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:centos-10-ocaml-5.4@sha256:23f0caa16084a4778021b31ba00421da517c6ccbe5f1d823ba5a32d0c2f9bb96
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn lwt.6.1.0 6.1.0
RUN opam reinstall lwt.6.1.0; \
    res=$?; \
    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 "\"centos-10\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'lwt.6.1.0' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1
RUN (opam reinstall --with-test lwt.6.1.0) || true
RUN opam reinstall --with-test --verbose lwt.6.1.0; \
    res=$?; \
    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 "\"centos-10\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'lwt.6.1.0' && partial_fails="$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 .

2026-01-27 17:10.05: Using cache hint "ocaml/opam:centos-10-ocaml-5.4@sha256:23f0caa16084a4778021b31ba00421da517c6ccbe5f1d823ba5a32d0c2f9bb96-lwt.6.1.0-db8e0fb5655c576d3615f37fe2c1579cc1be0040"
2026-01-27 17:10.05: Using OBuilder spec:
((from ocaml/opam:centos-10-ocaml-5.4@sha256:23f0caa16084a4778021b31ba00421da517c6ccbe5f1d823ba5a32d0c2f9bb96)
 (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 lwt.6.1.0 6.1.0"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall lwt.6.1.0;\
             \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 \"\\\"centos-10\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'lwt.6.1.0' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
 (run (network host)
      (shell "(opam reinstall --with-test lwt.6.1.0) || true"))
 (run (shell  "opam reinstall --with-test --verbose lwt.6.1.0;\
             \n        res=$?;\
             \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 \"\\\"centos-10\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'lwt.6.1.0' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-01-27 17:10.05: Waiting for resource in pool OCluster
2026-01-27 17:10.06: Waiting for worker…
2026-01-27 17:19.37: Got resource from pool OCluster
Building on bremusa.ocamllabs.io
HEAD is now at db8e0fb565 mark buggy lwt_ppx as avoid
HEAD is now at 51158b2cc8 Merge pull request #29283 from mbarbin/opam-publish-loc.0.3.3
Merge made by the 'ort' strategy.
 packages/lwt/lwt.6.1.0/opam         | 64 +++++++++++++++++++++++++++++++++++++
 packages/lwt_ppx/lwt_ppx.6.0.0/opam |  1 +
 packages/lwt_ppx/lwt_ppx.6.1.0/opam | 46 ++++++++++++++++++++++++++
 3 files changed, 111 insertions(+)
 create mode 100644 packages/lwt/lwt.6.1.0/opam
 create mode 100644 packages/lwt_ppx/lwt_ppx.6.1.0/opam

(from ocaml/opam:centos-10-ocaml-5.4@sha256:23f0caa16084a4778021b31ba00421da517c6ccbe5f1d823ba5a32d0c2f9bb96)
Unable to find image 'ocaml/opam:centos-10-ocaml-5.4@sha256:23f0caa16084a4778021b31ba00421da517c6ccbe5f1d823ba5a32d0c2f9bb96' locally
Error response from daemon: Get "https://registry-1.docker.io/v2/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
Uncaught exception: Failure("\"docker\" \"create\" \"--\" \"ocaml/opam:centos-10-ocaml-5.4@sha256:23f0caa16084a4778021b31ba00421da517c6ccbe5f1d823ba5a32d0c2f9bb96\" failed with exit status 1")
2026-01-27 17:34.00: Job failed: Failed: Internal error