(for PR #28222)

2025-07-22 12:16.01: New job: build lwt.6.0.0~alpha01, using opam 2.3
                              from https://github.com/ocaml/opam-repository.git#refs/pull/28222/head (381d421c95f23c7e41d7bd80fe4ee0fa7b4fca2f)
                              on debian-12-ocaml-4.13/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/28222/head" && git reset --hard 381d421c
git fetch origin master
git merge --no-edit 14fd69dba01fe02a6cbf63a81a67897e0f52cbfc
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-12-ocaml-4.13@sha256:8453984896221c10b9f6dbb641e69a61bf783e425e8bab438d83ed3fc53ec970
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn lwt.6.0.0~alpha01 6.0.0~alpha01
RUN opam reinstall lwt.6.0.0~alpha01; \
    res=$?; \
    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-12\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'lwt.6.0.0~alpha01' && partial_fails="$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 .

2025-07-22 12:16.01: Using cache hint "ocaml/opam:debian-12-ocaml-4.13@sha256:8453984896221c10b9f6dbb641e69a61bf783e425e8bab438d83ed3fc53ec970-lwt.6.0.0~alpha01-381d421c95f23c7e41d7bd80fe4ee0fa7b4fca2f"
2025-07-22 12:16.01: Using OBuilder spec:
((from ocaml/opam:debian-12-ocaml-4.13@sha256:8453984896221c10b9f6dbb641e69a61bf783e425e8bab438d83ed3fc53ec970)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo ln -f /usr/bin/opam-2.3 /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.6.0.0~alpha01 6.0.0~alpha01"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall lwt.6.0.0~alpha01;\
             \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-12\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'lwt.6.0.0~alpha01' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2025-07-22 12:16.01: Waiting for resource in pool OCluster
2025-07-22 12:16.58: Waiting for worker…
2025-07-22 12:19.14: Got resource from pool OCluster
Building on bremusa.ocamllabs.io
All commits already cached
Updating files:  96% (17311/17879)
Updating files:  97% (17343/17879)
Updating files:  98% (17522/17879)
Updating files:  99% (17701/17879)
Updating files: 100% (17879/17879)
Updating files: 100% (17879/17879), done.
HEAD is now at 14fd69dba0 Merge pull request #28217 from sim642/opam-state-2.4-upper-bounds
Updating 14fd69dba0..381d421c95
Fast-forward
 packages/lwt/lwt.6.0.0~alpha01/opam               | 69 +++++++++++++++++++++++
 packages/lwt_direct/lwt_direct.6.0.0~alpha01/opam | 44 +++++++++++++++
 packages/lwt_log/lwt_log.1.1.0/opam               |  2 +-
 packages/lwt_log/lwt_log.1.1.1/opam               |  2 +-
 packages/lwt_log/lwt_log.1.1.2/opam               |  2 +-
 5 files changed, 116 insertions(+), 3 deletions(-)
 create mode 100644 packages/lwt/lwt.6.0.0~alpha01/opam
 create mode 100644 packages/lwt_direct/lwt_direct.6.0.0~alpha01/opam

(from ocaml/opam:debian-12-ocaml-4.13@sha256:8453984896221c10b9f6dbb641e69a61bf783e425e8bab438d83ed3fc53ec970)
2025-07-22 12:19.29 ---> using "36615a697ec6cb8893e39353020e007d8ff91205862a979f3c066b8eb36d384f" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam"))
2025-07-22 12:19.29 ---> using "8442e4a7a6380ea4f5111943c5c2d45122c93c42ea525ce1e3b55c45829a2a2e" from cache

/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 development 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
2025-07-22 12:19.29 ---> using "6d2ae86247c00c46f49c74f207f705f8a00b451887706d03fcd6c30b87892af5" from cache

/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         2.3.0 (35acd0c5abc5e66cdbd5be16ba77aa6c33a4c724)
# self-upgrade         no
# system               arch=x86_64 os=linux os-distribution=debian os-version=12
# 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       4.13
# invariant            ["ocaml-base-compiler" {= "4.13.1"}]
# compiler-packages    ocaml-base-compiler.4.13.1, ocaml-options-vanilla.1
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/4.13/lib/ocaml/stublibs:/home/opam/.opam/4.13/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       4.13.1
2025-07-22 12:19.29 ---> using "a9e11a9511d647bef7b18058d1774483840699b1d5373ed4067db1a217e6fb13" from cache

/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/"))
2025-07-22 12:19.29 ---> using "3a484016238c8cec1eb608b5a2f45a1a895bf8edb5c87a9c13551a0d26673941" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2025-07-22 12:19.31 ---> saved as "aaded090dabed06c17ed244aeeb4f59f2d86e1f3a4258f1d61b06e6016ab09ff"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-07-22 12:19.50 ---> saved as "f6d7cd70be42b05f22ffd51f3677c720d90cd7d364e76b8aa7f7feb4a72ad959"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Hit:1 http://deb.debian.org/debian bookworm InRelease
- Get:2 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]
- Get:3 http://deb.debian.org/debian-security bookworm-security InRelease [48.0 kB]
- Fetched 103 kB in 0s (294 kB/s)
- Reading package lists...
- 
2025-07-22 12:19.52 ---> saved as "833e4d0a83ee1741e36ace83104cb5e8d490e262e4803d50297b0cb6ad4a9a29"

/home/opam: (run (shell "opam pin add -k version -yn lwt.6.0.0~alpha01 6.0.0~alpha01"))
lwt is now pinned to version 6.0.0~alpha01
2025-07-22 12:19.54 ---> saved as "827ecae84aaebb068b5809cbdfd98b562f84747027fc3b4da82d041fc197fe98"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall lwt.6.0.0~alpha01;\
                        \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-12\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'lwt.6.0.0~alpha01' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
lwt.6.0.0~alpha01 is not installed. Install it? [y/n] y
  * Incompatible packages:
    - (invariant) -> ocaml-base-compiler = 4.13.1
    - lwt >= 6.0.0~alpha01 -> ocaml >= 4.14 -> ocaml-variants < 5.0.1~
    You can temporarily relax the switch invariant with `--update-invariant'
  * Missing dependency:
    - lwt >= 6.0.0~alpha01 -> ocaml >= 4.14 -> ocaml-variants < 5.0.1~ -> ocaml-beta
    unmet availability conditions: 'enable-ocaml-beta-repository'
  * Missing dependency:
    - lwt >= 6.0.0~alpha01 -> ocaml >= 4.14 -> ocaml-variants >= 4.14.0~ -> system-msvc
    unmet availability conditions: 'os = "win32"'

No solution found, exiting
"/usr/bin/env" "bash" "-c" "opam reinstall lwt.6.0.0~alpha01;
        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-12\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'lwt.6.0.0~alpha01' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 20
2025-07-22 12:20.17: Job failed: Failed: Build failed
2025-07-22 12:20.17: Log analysis:
2025-07-22 12:20.17: >>> 
No solution found, exiting
 (score = 100)
2025-07-22 12:20.17: [SKIP] Package not available