(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 archlinux-ocaml-5.3/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/27920/head" && git reset --hard 67423ee8
git fetch origin master
git merge --no-edit 428327733193cda496cf0f6a6e47f2172aab591e
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:archlinux-ocaml-5.3@sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3
RUN opam reinstall ocaml-fsrs.0.1.0-alpha3; \
    res=$?; \
    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 "\"archlinux\""; 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:archlinux-ocaml-5.3@sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c-ocaml-fsrs.0.1.0-alpha3-67423ee84b72a0a7e34b6e84fbb039f220f355cd"
2025-05-24 17:48.54: Using OBuilder spec:
((from ocaml/opam:archlinux-ocaml-5.3@sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c)
 (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 \"\\\"archlinux\\\"\"; 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 17:48.55: Got resource from pool OCluster
Building on x86-bm-c4.sw.ocaml.org
All commits already cached
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:archlinux-ocaml-5.3@sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c)
Unable to find image 'ocaml/opam:archlinux-ocaml-5.3@sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c' locally
docker.io/ocaml/opam@sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c: Pulling from ocaml/opam
e5a3d5dbdb12: Pulling fs layer
e5a3d5dbdb12: Download complete
e5a3d5dbdb12: Pull complete
Digest: sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c
Status: Downloaded newer image for ocaml/opam@sha256:538e9f4f0dc28a9e4706a32ebeba24a39fa9bcf0c5bba6745853c2a2bdec604c
2025-05-24 17:50.56 ---> saved as "6ccb95b9520e8f0d274bc94b2901e872c7edaa4c5890918de91f4d17451da388"

/: (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 17:50.57 ---> saved as "f7c2c31378b4efd4f1151fc58cbbb398181cf38dda296014f73cceec40345342"

/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
[NOTE] The 'jobs' option was reset, its value was 255 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=255 --global
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2025-05-24 17:51.28 ---> saved as "5fbd8c3b583f8bc5a80cd85f61f8203aa4e8683fd0ffa79808f155a47b1ca1d5"

/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=arch os-version=20250511.0.348143
# solver               builtin-0install
# install-criteria     -changed,-count[avoid-version,solution]
# upgrade-criteria     -count[avoid-version,solution]
# jobs                 31
# 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 17:51.29 ---> saved as "3fb8435dbb1fbd0174d8d6e4c01752f51f333a92c33d8ebcc009f13a816e94b0"

/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 17:51.36 ---> saved as "90741f4f9a6107e31c7b7666555b9a2e4f37442b8c17c468ac3d8df506275df2"

/home/opam: (copy (src .) (dst opam-repository/))
2025-05-24 17:51.45 ---> saved as "ccf742a54af03b0a5646a1243f8acc863b981a6bb81720dde9da0fd4c8296e3a"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-05-24 17:52.07 ---> saved as "0894df072ebc2c31fa559a1ee19bd24c31fec04ae21b355e1714502dca0a5002"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/sbin/sudo "pacman" "-Sy"
- :: Synchronizing package databases...
-  core downloading...
-  extra downloading...
2025-05-24 17:52.07 ---> saved as "0521febbe3c9ddc25aaa016666ec5bf61eca7d05432973fe1523bdadd1fddeb2"

/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 17:52.08 ---> saved as "db3555aa794c49a3b3af0448b672eeb99fb36bec3daf6a904c583243a85c61d5"

/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 \"\\\"archlinux\\\"\"; 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
  ∗ angstrom                0.16.1                [required by timedesc]
  ∗ base                    v0.17.2               [required by ocaml-fsrs]
  ∗ bigstringaf             0.10.0                [required by angstrom]
  ∗ csexp                   1.5.2                 [required by dune-configurator]
  ∗ dune                    3.19.0                [required by ocaml-fsrs]
  ∗ dune-configurator       3.19.0                [required by base]
  ∗ ocaml-fsrs              0.1.0-alpha3 (pinned)
  ∗ ocaml-syntax-shims      1.0.0                 [required by angstrom]
  ∗ ocaml_intrinsics_kernel v0.17.1               [required by base]
  ∗ ocamlbuild              0.16.1                [required by ptime]
  ∗ ocamlfind               1.9.8                 [required by ptime]
  ∗ ptime                   1.2.0                 [required by timedesc]
  ∗ result                  1.5                   [required by timedesc]
  ∗ seq                     base                  [required by timedesc]
  ∗ sexplib0                v0.17.0               [required by base]
  ∗ timedesc                3.1.0                 [required by ocaml-fsrs]
  ∗ timedesc-tzdb           3.1.0                 [required by timedesc]
  ∗ timedesc-tzlocal        3.1.0                 [required by timedesc]
  ∗ 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)
∗ 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.1.0.8  (cached)
∗ installed ocamlfind.1.9.8
∗ installed ocamlbuild.0.16.1
∗ installed topkg.1.0.8
∗ installed ptime.1.2.0
∗ installed dune.3.19.0
∗ 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.3.19.0
∗ 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)")


<><> 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)

The former state can be restored with:
    /usr/bin/opam switch import "/home/opam/.opam/5.3/.opam-switch/backup/state-20250524175209.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 "\"archlinux\""; 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 17:53.08: Job failed: Failed: Build failed
2025-05-24 17:53.08: Log analysis:
2025-05-24 17:53.08: >>> 
[ERROR] Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum
 (score = 25)
2025-05-24 17:53.08: Failed to get sources of ocaml-fsrs.0.1.0-alpha3: Bad checksum