(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-afl/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/27920/head" && git reset --hard 67423ee8
git fetch origin master
git merge --no-edit b6a264c784afa1e19f7a926fc10d49010ad12be4
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-5.4-afl@sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3
RUN opam reinstall ocaml-fsrs.0.1.0-alpha3; \
    res=$?; \
    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-afl@sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419-ocaml-fsrs.0.1.0-alpha3-67423ee84b72a0a7e34b6e84fbb039f220f355cd"
2025-11-10 16:56.21: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.4-afl@sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419)
 (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 21:19.13: Waiting for worker…
2025-11-10 21:26.32: Got resource from pool OCluster
Building on toxis.caelum.ci.dev
All commits already cached
Updating files:  67% (12589/18706)
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Updating files: 100% (18706/18706)
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-afl@sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419)
Unable to find image 'ocaml/opam:debian-13-ocaml-5.4-afl@sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419' locally
docker.io/ocaml/opam@sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419: Pulling from ocaml/opam
13cc39f8244a: Already exists
b27d53669817: Already exists
062c909e206e: Already exists
265baae72087: Already exists
b6b7b385247c: Already exists
bfb7bf5b7c6d: Already exists
b18c76fc18f2: Already exists
6bdbb37ee35f: Already exists
84035aa4da2d: Already exists
0c3307e14207: Already exists
30b92d637d72: Already exists
991b07583706: Already exists
e1d7a79a1495: Already exists
6b08d63c6214: Already exists
4c7236344711: Already exists
12506f41e8b0: Already exists
12506f41e8b0: Already exists
2330d596aec1: Already exists
a48299f5ec62: Already exists
04618a577568: Already exists
8c4b002d072b: Already exists
4f4fb700ef54: Already exists
ff68f05e2976: Already exists
d5543b560a3e: Already exists
4a9030bbb1ef: Already exists
c59b3bec3411: Already exists
85a7c9be9495: Already exists
dbc6bd8f2e44: Already exists
6680a5133ca2: Already exists
470c0056084c: Already exists
6b9af56b67cf: Already exists
c572cde25fb3: Already exists
033b2d405acf: Already exists
663cc5b3d424: Already exists
840bbd47fded: Already exists
fb8f644ba010: Already exists
66735543f230: Already exists
7896354b8c11: Already exists
a0063722d8c2: Already exists
7018e4a5881b: Already exists
16e9788b00a9: Pulling fs layer
48a4d63c0fd5: Pulling fs layer
909a94e6d8df: Pulling fs layer
4e1807c2bc58: Pulling fs layer
ef81450a73dd: Pulling fs layer
7790026e1c7f: Pulling fs layer
909a94e6d8df: Waiting
4e1807c2bc58: Waiting
a63c8b471df5: Pulling fs layer
ef81450a73dd: Waiting
7790026e1c7f: Waiting
48a4d63c0fd5: Verifying Checksum
48a4d63c0fd5: Download complete
909a94e6d8df: Verifying Checksum
909a94e6d8df: Download complete
16e9788b00a9: Verifying Checksum
16e9788b00a9: Download complete
16e9788b00a9: Pull complete
48a4d63c0fd5: Pull complete
909a94e6d8df: Pull complete
ef81450a73dd: Verifying Checksum
ef81450a73dd: Download complete
7790026e1c7f: Verifying Checksum
7790026e1c7f: Download complete
a63c8b471df5: Verifying Checksum
a63c8b471df5: Download complete
4e1807c2bc58: Verifying Checksum
4e1807c2bc58: Download complete
4e1807c2bc58: Pull complete
ef81450a73dd: Pull complete
7790026e1c7f: Pull complete
a63c8b471df5: Pull complete
Digest: sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419
Status: Downloaded newer image for ocaml/opam@sha256:8686d8e9d10d49ce04513d6ae260364579e9cb86eb8430c58d27c3e28c9f6419
2025-11-10 21:26.36 ---> using "81e3a96a7fb74d60dffae275703b1452ae430c940abef8eb4c8cc31461751f2d" 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 21:26.36 ---> using "08bfbffbccfe9fd8b5d7585c7a9b1f81f3651f191ea7c5e768dead3e93c845ce" 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.

Continue? [Y/n] y
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.

Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2025-11-10 21:26.36 ---> using "1839c32af154d5c1c3a6d6b1c3c041b5d7fdd860dbc14590f86fcf738f977ba0" 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-afl.1, ocaml-options-only-afl.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+afl
2025-11-10 21:26.36 ---> using "24ed4ecd0a1ddbd1feb2a4b84410f69bc2ac93de808c71a9db0afdeba12d87e8" 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 21:26.36 ---> using "dc046629514dcaeab4422eca78bcc083e34c7390953128e541afcd8e10bdaf63" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2025-11-10 21:26.45 ---> saved as "f9f8c4183e7d22ef9501a380c3217042ff8b49dc0d672e2342aeb7bbc3ad89a9"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-11-10 21:27.14 ---> saved as "cf7f9da2383737930c36bbce340e8c57b2238073e9c5d818a01d0b2b27554252"

/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 (917 kB/s)
- Reading package lists...
- 
2025-11-10 21:27.16 ---> saved as "0b2ca705bbd884a1d04f662356575bf332e4ce07702d8bb96e2914c78bee2e69"

/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 21:27.18 ---> saved as "7264afdabeb1d43a352111d434a3c2b415b73d9c4bdb329409c69263b8a501dd"

/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 csexp.1.5.2
-> installed ocaml-syntax-shims.1.0.0
-> installed ocaml_intrinsics_kernel.v0.17.1
-> installed result.1.5
-> installed sexplib0.v0.17.0
-> 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.v0.17.3

#=== 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)")


<><> 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)

The former state can be restored with:
    /usr/bin/opam switch import "/home/opam/.opam/5.4/.opam-switch/backup/state-20251110212719.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
2025-11-10 21:29.19: Job failed: Failed: Build failed
2025-11-10 21:29.19: Log analysis:
2025-11-10 21:29.19: >>> 
[ERROR] Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum
 (score = 25)
2025-11-10 21:29.19: Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum