(for PR #27920)

2025-11-10 16:56.21: New job: build ocaml-fsrs.0.1.0-alpha3, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/27920/head (67423ee84b72a0a7e34b6e84fbb039f220f355cd)
                              on debian-13-ocaml-5.4-no-flat-float-array/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/27920/head" && git reset --hard 67423ee8
git fetch origin master
git merge --no-edit b6a264c784afa1e19f7a926fc10d49010ad12be4
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:2bcd28a3230d4a8cf8fccdddef5cdfefd39a8c7f0d6719d7222cfef487be51a4
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3
RUN opam reinstall ocaml-fsrs.0.1.0-alpha3; \
    res=$?; \
    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 "$pkg" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails="$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 .

2025-11-10 16:56.21: Using cache hint "ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:2bcd28a3230d4a8cf8fccdddef5cdfefd39a8c7f0d6719d7222cfef487be51a4-ocaml-fsrs.0.1.0-alpha3-67423ee84b72a0a7e34b6e84fbb039f220f355cd"
2025-11-10 16:56.21: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:2bcd28a3230d4a8cf8fccdddef5cdfefd39a8c7f0d6719d7222cfef487be51a4)
 (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 ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall ocaml-fsrs.0.1.0-alpha3;\
             \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 \"$pkg\" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2025-11-10 16:56.21: Waiting for resource in pool OCluster
2025-11-10 21:19.16: Waiting for worker…
2025-11-10 21:27.15: Got resource from pool OCluster
Building on bremusa.ocamllabs.io
All commits already cached
Updating files:  64% (12012/18706)
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Updating files: 100% (18706/18706), done.
HEAD is now at b6a264c784 Merge pull request #28853 from AltGr/catala100
Merge made by the 'ort' strategy.
 packages/ocaml-fsrs/ocaml-fsrs.0.1.0-alpha3/opam | 41 ++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 packages/ocaml-fsrs/ocaml-fsrs.0.1.0-alpha3/opam

(from ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:2bcd28a3230d4a8cf8fccdddef5cdfefd39a8c7f0d6719d7222cfef487be51a4)
2025-11-10 21:27.25 ---> using "097b81f12e1b98e0e98adea70af84cbf08759d2b8178fd2317c8aa1b53b15d42" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2025-11-10 21:27.25 ---> using "e67960f19bff6f49abf3b1dd55488cf0e5fbc2862270ad8b211310234837fbb0" 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 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
2025-11-10 21:27.25 ---> using "cada53cc380028cd0696e15f67ebd045d54bc3608d20668c95fc1b4b24df9ced" 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         2.5.0~alpha1
# 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       5.4
# invariant            ["ocaml-variants" {= "5.4.0+options"}]
# compiler-packages    ocaml-compiler.5.4.0, ocaml-option-no-flat-float-array.1, ocaml-options-only-no-flat-float-array.1, ocaml-variants.5.4.0+options
# 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+options+no-flat-float-array
2025-11-10 21:27.25 ---> using "fc661388c78df9eb8b283fe4dc8fa6807c954577ae8f56be328b78ab3d3dc85a" 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/"))
2025-11-10 21:27.25 ---> using "187f5d7b0ca5fd6bb497058182ca65aae4af0cc8679a68a92328d5dd2e133f0a" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2025-11-10 21:27.39 ---> saved as "cb884997d78710820dcfa12b442c9bf7c48854a2ad950d9c536024e6437eba9b"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-11-10 21:28.15 ---> saved as "0be13c3b6105303ed33ece144af5ba097ccf8c666eca855345e6435f86d64be7"

/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 [69.3 kB]
- Fetched 160 kB in 0s (633 kB/s)
- Reading package lists...
- 
2025-11-10 21:28.17 ---> saved as "d44bc48a70f7ebd62033f4b05f2380e0d500719201c99543d643b136e419f8e3"

/home/opam: (run (shell "opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3"))
ocaml-fsrs is now pinned to version 0.1.0-alpha3
2025-11-10 21:28.19 ---> saved as "4884a196da274314aecc435d9a6a1f96d5dc5ea5b50c3d3622f22fedf7908a0d"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall ocaml-fsrs.0.1.0-alpha3;\
                        \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 \"$pkg\" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
ocaml-fsrs.0.1.0-alpha3 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 19 packages
  - install angstrom                0.16.1                [required by timedesc]
  - install base                    v0.17.3               [required by ocaml-fsrs]
  - install bigstringaf             0.10.0                [required by angstrom]
  - install csexp                   1.5.2                 [required by dune-configurator]
  - install dune                    3.20.2                [required by ocaml-fsrs]
  - install dune-configurator       3.20.2                [required by base]
  - install ocaml-fsrs              0.1.0-alpha3 (pinned)
  - install ocaml-syntax-shims      1.0.0                 [required by angstrom]
  - install ocaml_intrinsics_kernel v0.17.1               [required by base]
  - install ocamlbuild              0.16.1                [required by ptime]
  - install ocamlfind               1.9.8                 [required by ptime]
  - install ptime                   1.2.0                 [required by timedesc]
  - install result                  1.5                   [required by timedesc]
  - install seq                     base                  [required by timedesc]
  - install sexplib0                v0.17.0               [required by base]
  - install timedesc                3.1.0                 [required by ocaml-fsrs]
  - install timedesc-tzdb           3.1.0                 [required by timedesc]
  - install timedesc-tzlocal        3.1.0                 [required by timedesc]
  - install topkg                   1.1.1                 [required by ptime]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved angstrom.0.16.1  (cached)
-> retrieved base.v0.17.3  (cached)
-> retrieved bigstringaf.0.10.0  (cached)
-> retrieved csexp.1.5.2  (cached)
-> retrieved dune.3.20.2, dune-configurator.3.20.2  (cached)
[ERROR] Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum
-> retrieved ocaml-syntax-shims.1.0.0  (cached)
-> retrieved ocaml_intrinsics_kernel.v0.17.1  (cached)
-> retrieved ocamlbuild.0.16.1  (cached)
-> retrieved ocamlfind.1.9.8  (cached)
-> retrieved ptime.1.2.0  (cached)
-> retrieved result.1.5  (cached)
-> retrieved seq.base  (cached)
-> installed seq.base
-> retrieved sexplib0.v0.17.0  (cached)
-> retrieved timedesc.3.1.0, timedesc-tzdb.3.1.0, timedesc-tzlocal.3.1.0  (cached)
-> retrieved topkg.1.1.1  (cached)
-> installed ocamlfind.1.9.8
-> installed ocamlbuild.0.16.1
-> installed topkg.1.1.1
-> installed ptime.1.2.0
-> installed dune.3.20.2
-> installed result.1.5
-> installed csexp.1.5.2
-> installed ocaml_intrinsics_kernel.v0.17.1
-> installed ocaml-syntax-shims.1.0.0
-> installed sexplib0.v0.17.0
-> installed timedesc-tzlocal.3.1.0
-> installed timedesc-tzdb.3.1.0
-> installed dune-configurator.3.20.2
-> installed bigstringaf.0.10.0
-> installed angstrom.0.16.1
-> installed timedesc.3.1.0
-> installed base.v0.17.3

#=== ERROR while fetching sources for ocaml-fsrs.0.1.0-alpha3 =================#
OpamSolution.Fetch_fail("https://github.com/chaosarium/ocaml-fsrs/archive/refs/tags/0.1.0-alpha3.tar.gz (Bad checksum, expected sha256=e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855)")

The former state can be restored with:
    /usr/bin/opam switch import "/home/opam/.opam/5.4/.opam-switch/backup/state-20251110212820.export"


<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - fetch ocaml-fsrs 0.1.0-alpha3
+- 
+- The following changes have been performed
| - install angstrom                0.16.1
| - install base                    v0.17.3
| - install bigstringaf             0.10.0
| - install csexp                   1.5.2
| - install dune                    3.20.2
| - install dune-configurator       3.20.2
| - install ocaml-syntax-shims      1.0.0
| - install ocaml_intrinsics_kernel v0.17.1
| - install ocamlbuild              0.16.1
| - install ocamlfind               1.9.8
| - install ptime                   1.2.0
| - install result                  1.5
| - install seq                     base
| - install sexplib0                v0.17.0
| - install timedesc                3.1.0
| - install timedesc-tzdb           3.1.0
| - install timedesc-tzlocal        3.1.0
| - install topkg                   1.1.1
+- 
# To update the current shell environment, run: eval $(opam env)
"/usr/bin/env" "bash" "-c" "opam reinstall ocaml-fsrs.0.1.0-alpha3;
        res=$?;
        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 "$pkg" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 40
2025-11-10 21:30.33: Job failed: Failed: Build failed
2025-11-10 21:30.33: Log analysis:
2025-11-10 21:30.33: >>> 
[ERROR] Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum
 (score = 25)
2025-11-10 21:30.33: Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum