(for PR #27920)

2025-05-24 17:48.54: New job: build ocaml-fsrs.0.1.0-alpha3, using opam 2.3
                              from https://github.com/ocaml/opam-repository.git#refs/pull/27920/head (67423ee84b72a0a7e34b6e84fbb039f220f355cd)
                              on debian-12-ocaml-5.3/s390x

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/27920/head" && git reset --hard 67423ee8
git fetch origin master
git merge --no-edit 428327733193cda496cf0f6a6e47f2172aab591e
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-12-ocaml-5.3@sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3
RUN opam reinstall ocaml-fsrs.0.1.0-alpha3; \
    res=$?; \
    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-12\""; 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 .

2025-05-24 17:48.54: Using cache hint "ocaml/opam:debian-12-ocaml-5.3@sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163-ocaml-fsrs.0.1.0-alpha3-67423ee84b72a0a7e34b6e84fbb039f220f355cd"
2025-05-24 17:48.54: Using OBuilder spec:
((from ocaml/opam:debian-12-ocaml-5.3@sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163)
 (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 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-12\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2025-05-24 17:48.54: Waiting for resource in pool OCluster
2025-05-24 17:48.54: Waiting for worker…
2025-05-24 17:50.11: Got resource from pool OCluster
Building on s390x-worker-01.marist.ci.dev
Updating files:  64% (14951/23100)
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Updating files: 100% (23100/23100)
Updating files: 100% (23100/23100), done.
HEAD is now at c6650bbd38 dns-cli: add dns-resolver dependency
HEAD is now at 4283277331 Merge pull request #27903 from patricoferris/patch-2
Updating 4283277331..67423ee84b
Fast-forward
 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-12-ocaml-5.3@sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163)
Unable to find image 'ocaml/opam:debian-12-ocaml-5.3@sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163' locally
docker.io/ocaml/opam@sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163: Pulling from ocaml/opam
a5e7ec27bb28: Already exists
1a0a5e1ae837: Already exists
af5cbbca5a95: Already exists
e38b34443d5d: Already exists
6e118d4646e7: Already exists
772a298ca0a2: Already exists
3d4175a24c80: Already exists
934849f2d033: Already exists
53a641444425: Already exists
15d735fb1af2: Already exists
bec537f5413b: Already exists
d9da8ae6a8ab: Already exists
9e2bba1421b6: Already exists
73dff342593d: Already exists
cffcef3786c1: Already exists
1f29ff394d17: Already exists
290ee4e4e08b: Already exists
6c6c913d6376: Already exists
08dd7cf10b89: Already exists
a23c090c6420: Already exists
4f4fb700ef54: Already exists
2730820e2971: Already exists
b97e8fd89a0d: Already exists
3ccc56a83714: Already exists
348c052fbda1: Already exists
981024d3975f: Already exists
5de21fc49d0e: Already exists
ea4c40d04363: Already exists
308356ae1ebf: Already exists
aa560d2e1541: Already exists
f7b4bb836469: Already exists
9d7ef2ee0716: Already exists
ab70bd6b0f1d: Already exists
588bc858f107: Already exists
43a4fc81c76e: Already exists
7f8048c7e6ce: Already exists
fddea7f6c454: Already exists
5e5429890309: Already exists
b8cdb1e5be5b: Pulling fs layer
aa15d9771356: Pulling fs layer
94251e65e08a: Pulling fs layer
5d4fc8131623: Pulling fs layer
0e4cb004f22d: Pulling fs layer
86c31275926b: Pulling fs layer
ba4af9b05d37: Pulling fs layer
5d4fc8131623: Waiting
0e4cb004f22d: Waiting
86c31275926b: Waiting
ba4af9b05d37: Waiting
aa15d9771356: Verifying Checksum
aa15d9771356: Download complete
b8cdb1e5be5b: Verifying Checksum
b8cdb1e5be5b: Download complete
94251e65e08a: Download complete
0e4cb004f22d: Verifying Checksum
0e4cb004f22d: Download complete
b8cdb1e5be5b: Pull complete
86c31275926b: Verifying Checksum
86c31275926b: Download complete
ba4af9b05d37: Verifying Checksum
ba4af9b05d37: Download complete
aa15d9771356: Pull complete
94251e65e08a: Pull complete
5d4fc8131623: Verifying Checksum
5d4fc8131623: Download complete
5d4fc8131623: Pull complete
0e4cb004f22d: Pull complete
86c31275926b: Pull complete
ba4af9b05d37: Pull complete
Digest: sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163
Status: Downloaded newer image for ocaml/opam@sha256:4138fb8ffc0651348293b9dfbd540b27ad5f141e830952ca8680218af25fb163
2025-05-24 17:50.22 ---> using "75973b12e1ffbacb48415cf8b31d2c9fe848017645801a9e2b116ba83ba4b7e0" 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"))
2025-05-24 17:50.22 ---> using "11336782875c328cfc99eab6f2756d63f1d3308a4c7de908b89487642d3ea399" 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
2025-05-24 17:50.22 ---> using "30dc9dad1c402b5627852499d2a59b57dd36713bc9a7e955628ee8cebfa870d6" 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=s390x 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                 3
# repositories         1 (version-controlled)
# pinned               1 (version)
# current-switch       5.3
# invariant            ["ocaml-base-compiler" {>= "5.3.0"}]
# compiler-packages    ocaml-base-compiler.5.3.0, ocaml-compiler.5.3.0, ocaml-options-vanilla.1
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/5.3/lib/ocaml/stublibs:/home/opam/.opam/5.3/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       5.3.0
2025-05-24 17:50.22 ---> using "57b78a2b56349f30aa5756dd817bd7ede89d5c474b889421f5a7b6a8d882c897" 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/"))
2025-05-24 17:50.22 ---> using "c1569b0f9bfde9ec1cb0af556187db96c0f7cc5c033bffbe556eef456a9127ba" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2025-05-24 17:51.24 ---> saved as "2c158c5f219c72e1a7d6a24deb2e89a8fff352eb1611f707c7aff17decb29b77"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-05-24 17:54.56 ---> saved as "0062f4d22b0c36ee93f9387f5d2a702abac931343474ad5d9bb07d34dc48c92e"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Get:1 http://deb.debian.org/debian bookworm InRelease [151 kB]
- 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]
- Get:4 http://deb.debian.org/debian bookworm/main s390x Packages [8458 kB]
- Get:5 http://deb.debian.org/debian-security bookworm-security/main s390x Packages [229 kB]
- Fetched 8941 kB in 3s (3079 kB/s)
- Reading package lists...
- 
2025-05-24 17:55.15 ---> saved as "e4d21ba94b69303a5153921a68c993fb294559dfc0876e1da5da6f6ec59a9aba"

/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
2025-05-24 17:55.23 ---> saved as "a996a5479ff8583f2bc46d7068fe471f78081b09985653c1b20cdf4dccc45fd4"

/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-12\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails=\"$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                    v0.17.2               [required by ocaml-fsrs]
  - install bigstringaf             0.10.0                [required by angstrom]
  - install csexp                   1.5.2                 [required by dune-configurator]
  - install dune                    3.19.0                [required by ocaml-fsrs]
  - install dune-configurator       3.19.0                [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                   1.0.8                 [required by ptime]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved angstrom.0.16.1  (cached)
-> retrieved base.v0.17.2  (cached)
-> retrieved bigstringaf.0.10.0  (cached)
-> retrieved csexp.1.5.2  (cached)
-> retrieved dune.3.19.0, dune-configurator.3.19.0  (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)
-> retrieved sexplib0.v0.17.0  (cached)
-> retrieved timedesc.3.1.0, timedesc-tzdb.3.1.0, timedesc-tzlocal.3.1.0  (cached)
-> retrieved topkg.1.0.8  (cached)
-> installed ocamlfind.1.9.8
-> installed ocamlbuild.0.16.1
-> installed seq.base
-> installed topkg.1.0.8
-> installed ptime.1.2.0
-> installed dune.3.19.0
-> installed csexp.1.5.2
-> installed result.1.5
-> installed ocaml-syntax-shims.1.0.0
-> installed ocaml_intrinsics_kernel.v0.17.1
-> installed sexplib0.v0.17.0
-> installed timedesc-tzdb.3.1.0
-> installed dune-configurator.3.19.0
-> installed timedesc-tzlocal.3.1.0
-> installed bigstringaf.0.10.0
-> installed angstrom.0.16.1
-> installed timedesc.3.1.0
-> installed base.v0.17.2

#=== 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/5.3/.opam-switch/backup/state-20250524175529.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                    v0.17.2
| - install bigstringaf             0.10.0
| - install csexp                   1.5.2
| - install dune                    3.19.0
| - install dune-configurator       3.19.0
| - 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                   1.0.8
+- 
# 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-12\""; 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
2025-05-24 17:58.10: Job failed: Failed: Build failed
2025-05-24 17:58.10: Log analysis:
2025-05-24 17:58.10: >>> 
[ERROR] Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum
 (score = 25)
2025-05-24 17:58.10: Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum