(for PR #27920)

2025-09-17 10:25.34: 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-4.13/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/27920/head" && git reset --hard 67423ee8
git fetch origin master
git merge --no-edit 7949ff40d8af6dff67bf2361db44574e21c6d076
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-4.13@sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3
RUN opam reinstall ocaml-fsrs.0.1.0-alpha3; \
    res=$?; \
    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 .

2025-09-17 10:25.34: Using cache hint "ocaml/opam:debian-13-ocaml-4.13@sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e-ocaml-fsrs.0.1.0-alpha3-67423ee84b72a0a7e34b6e84fbb039f220f355cd"
2025-09-17 10:25.34: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-4.13@sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e)
 (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"))
)

2025-09-17 10:25.34: Waiting for resource in pool OCluster
2025-09-17 11:21.58: Waiting for worker…
2025-09-17 11:24.39: Got resource from pool OCluster
Building on doris.caelum.ci.dev
All commits already cached
HEAD is now at 7949ff40d8 Merge pull request #28501 from vscoqbot/opam-publish-vsrocq-language-server.2.3.0
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-4.13@sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e)
Unable to find image 'ocaml/opam:debian-13-ocaml-4.13@sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e' locally
docker.io/ocaml/opam@sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e: Pulling from ocaml/opam
15b1d8a5ff03: Already exists
4d5eb3ed0208: Already exists
b44e00377829: Already exists
93018e586176: Already exists
587e432a29e2: Already exists
cdf304204754: Already exists
a444cfe202e3: Already exists
964991c828c0: Already exists
a94458d90f79: Already exists
e972c69afbc9: Already exists
3997d62e9de2: Already exists
d78ea61f72f9: Already exists
c68a1176424c: Already exists
63495b383f1a: Already exists
aa1a6204320d: Already exists
187b2023e0b3: Already exists
4787e66ddf43: Already exists
973a552bac2d: Already exists
8ad831d15267: Already exists
a8377bc33a29: Already exists
84a002321686: Already exists
4f4fb700ef54: Already exists
5d52c4f201d6: Already exists
68ef19bc296a: Already exists
1cda2aa0af1b: Already exists
769f31bcfe07: Already exists
b1d715eb0b34: Already exists
6b92d559de80: Already exists
1552f16d9075: Already exists
7a69328970da: Already exists
e66b1fc86e6f: Already exists
b14737f10b30: Already exists
4b7cf33f8dea: Already exists
0499d18bfcaa: Already exists
fb0e4a52e51b: Already exists
af1ea896d29c: Already exists
cff41317f198: Already exists
fbb90a49a8ca: Already exists
2f7f155032eb: Already exists
02f68e1ce660: Already exists
94722d583c59: Pulling fs layer
271ba31d3db0: Pulling fs layer
c99433d5cb1d: Pulling fs layer
939cd5d5e507: Pulling fs layer
939cd5d5e507: Waiting
271ba31d3db0: Download complete
c99433d5cb1d: Verifying Checksum
c99433d5cb1d: Download complete
939cd5d5e507: Verifying Checksum
939cd5d5e507: Download complete
94722d583c59: Verifying Checksum
94722d583c59: Download complete
94722d583c59: Pull complete
271ba31d3db0: Pull complete
c99433d5cb1d: Pull complete
939cd5d5e507: Pull complete
Digest: sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e
Status: Downloaded newer image for ocaml/opam@sha256:38155c3ac45ade378a0bdc17d043ef58a1228d4cf8d076d1252504fd9e11685e
2025-09-17 11:45.36 ---> using "edc61b5613d526714c47ca7477704e6216df8c199e369c488443808988d2a3ba" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2025-09-17 11:45.36 ---> using "98b0051f6a023abdc23a34b0da83da48df4426a5cf0ee7434a0333e3d6a7fb2f" 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
[NOTE] The 'jobs' option was reset, its value was 71 and its new value will vary according to the current number of cores on your machine. You can restore the fixed value using:
           opam option jobs=71 --global
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2025-09-17 11:45.36 ---> using "7d85d8c233ced7f2fc39fd99d97194d9ee23a42cf05a60683b1d7cf5f4a4e7a5" 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         2.4.1
# 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                 255
# 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
2025-09-17 11:45.36 ---> using "17876d2f72f39114fca4b77f9b69a48898cb960300de0c44ef0bdeff88d2475e" 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/"))
2025-09-17 11:45.36 ---> using "971f4e189b29c0f8977d8bf7e3624fbee5db9fe49b786d02e7b49ad490fcfea8" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2025-09-17 11:45.43 ---> saved as "c7eb55d347ba46b2d09f0d30b6d458b9c500be7d6e21bb06456a6e617f77bc1f"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-09-17 11:46.02 ---> saved as "9c6acbabdd169c3995ca4c78358d7892b8bb6f93db5a3afd25caadb185c22e22"

/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 [40.4 kB]
- Fetched 131 kB in 0s (1352 kB/s)
- Reading package lists...
2025-09-17 11:46.03 ---> saved as "22b17c909b4b0135a058d18fe59e15adbada54107dc04a009849c6a0c67e1352"

/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
2025-09-17 11:46.05 ---> saved as "3d8d4a6b270a8e50934dc72c668568b8909bc4affbf0c17bc1072a976a6ec437"

/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 18 packages
  - install angstrom           0.16.1                [required by timedesc]
  - install base               v0.15.1               [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 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           v0.15.1               [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              1.1.0                 [required by ptime]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved angstrom.0.16.1  (cached)
-> retrieved base.v0.15.1  (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 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.v0.15.1  (cached)
-> retrieved timedesc.3.1.0, timedesc-tzdb.3.1.0, timedesc-tzlocal.3.1.0  (cached)
-> retrieved topkg.1.1.0  (cached)
-> installed ocamlfind.1.9.8
-> installed ocamlbuild.0.16.1
-> installed topkg.1.1.0
-> installed ptime.1.2.0
-> installed dune.3.20.2
-> installed csexp.1.5.2
-> installed ocaml-syntax-shims.1.0.0
-> installed result.1.5
-> installed sexplib0.v0.15.1
-> installed timedesc-tzdb.3.1.0
-> installed timedesc-tzlocal.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.v0.15.1

#=== 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)")


<><> 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               v0.15.1
| - 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 ocamlbuild         0.16.1
| - install ocamlfind          1.9.8
| - install ptime              1.2.0
| - install result             1.5
| - install seq                base
| - install sexplib0           v0.15.1
| - install timedesc           3.1.0
| - install timedesc-tzdb      3.1.0
| - install timedesc-tzlocal   3.1.0
| - install topkg              1.1.0
+- 
# To update the current shell environment, run: eval $(opam env)

The former state can be restored with:
    /usr/bin/opam switch import "/home/opam/.opam/4.13/.opam-switch/backup/state-20250917114605.export"
"/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
2025-09-17 11:46.46: Job failed: Failed: Build failed
2025-09-17 11:46.46: Log analysis:
2025-09-17 11:46.46: >>> 
[ERROR] Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum
 (score = 25)
2025-09-17 11:46.46: Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum