(not at the head of any monitored branch or PR)
2025-12-09 21:30.52: New job: build conf-flint.3.0, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/28935/head (52729bb8d87544615b6b51da763607debc3b5c6c)
                              on centos-10-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/28935/head" && git reset --hard 52729bb8
git fetch origin master
git merge --no-edit d684c896eb6f7e6030d6ee65338d9db22a612f01
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:centos-10-ocaml-5.4@sha256:7243a4642175aeabd19bf5427e37df29cd2f81e7406966a632d4363191b32c99
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn conf-flint.3.0 3.0
RUN opam reinstall conf-flint.3.0; \
    res=$?; \
    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 "\"centos-10\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'conf-flint.3.0' && partial_fails="$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 .

2025-12-09 21:30.52: Using cache hint "ocaml/opam:centos-10-ocaml-5.4@sha256:7243a4642175aeabd19bf5427e37df29cd2f81e7406966a632d4363191b32c99-conf-flint.3.0-52729bb8d87544615b6b51da763607debc3b5c6c"
2025-12-09 21:30.52: Using OBuilder spec:
((from ocaml/opam:centos-10-ocaml-5.4@sha256:7243a4642175aeabd19bf5427e37df29cd2f81e7406966a632d4363191b32c99)
 (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 conf-flint.3.0 3.0"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall conf-flint.3.0;\
             \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 \"\\\"centos-10\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'conf-flint.3.0' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2025-12-09 21:30.52: Waiting for resource in pool OCluster
2025-12-09 23:30.32: Waiting for worker…
2025-12-09 23:34.26: Got resource from pool OCluster
Building on clete
All commits already cached
Updating files:  95% (18120/18999)
Updating files:  96% (18240/18999)
Updating files:  97% (18430/18999)
Updating files:  98% (18620/18999)
Updating files:  99% (18810/18999)
Updating files: 100% (18999/18999)
Updating files: 100% (18999/18999), done.
HEAD is now at d684c896eb Merge pull request #29052 from balat/maintenance
Merge made by the 'ort' strategy.
 packages/conf-flint/conf-flint.3.0/opam | 15 ++++++++---
 packages/flint/flint.0.4.2/opam         | 48 +++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+), 4 deletions(-)
 create mode 100644 packages/flint/flint.0.4.2/opam

(from ocaml/opam:centos-10-ocaml-5.4@sha256:7243a4642175aeabd19bf5427e37df29cd2f81e7406966a632d4363191b32c99)
2025-12-09 23:35.10 ---> saved as "585d31324eba99552d5ca80f85a48e7e587f9391a47cecb2ad15336f5e2b2ea6"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2025-12-09 23:35.10 ---> saved as "06f5e1785665d6a8b734eeb6687bc43b944254312939b57474eb61968aae8413"

/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
2025-12-09 23:35.39 ---> saved as "2f55d7d41ecbcc95fa9baf4c23c15a9633f57a8975ea753556d57bff639600e0"

/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
# self-upgrade         no
# system               arch=x86_64 os=linux os-distribution=centos os-version=10
# 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-base-compiler" {>= "5.4.0"}]
# compiler-packages    ocaml-base-compiler.5.4.0, ocaml-compiler.5.4.0, ocaml-options-vanilla.1
# 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
2025-12-09 23:35.41 ---> saved as "c0218fb713d1f66c3b2b82409b9b27b710863f7b2ad2b099aa86e7ebd1a21243"

/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/"))
2025-12-09 23:35.52 ---> saved as "b10f3e05dedc83bf1263bbe8618765e626d7c07f169adbee092de8c8660663b3"

/home/opam: (copy (src .) (dst opam-repository/))
2025-12-09 23:36.06 ---> saved as "023da0d77a9a6ea181fdb3800dcd6dca4de52e7e49e250ff26eb779e9674a31a"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-12-09 23:36.27 ---> saved as "ce390bf18e3bf52f07214346ccc294992bf8dc9d3ebf7fad21efb78c1c6390ba"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "yum" "makecache"
- CentOS Stream 10 - BaseOS                        40 kB/s |  15 kB     00:00    
- CentOS Stream 10 - BaseOS                       8.2 MB/s | 6.8 MB     00:00    
- CentOS Stream 10 - AppStream                     41 kB/s |  15 kB     00:00    
- CentOS Stream 10 - AppStream                    4.5 MB/s | 3.5 MB     00:00    
- CentOS Stream 10 - CRB                           35 kB/s |  14 kB     00:00    
- CentOS Stream 10 - CRB                          4.5 MB/s | 774 kB     00:00    
- CentOS Stream 10 - Extras packages               39 kB/s |  14 kB     00:00    
- CentOS Stream 10 - Extras packages              1.6 kB/s | 8.1 kB     00:05    
- Last metadata expiration check: 0:00:01 ago on Tue Dec  9 23:36:39 2025.
- Metadata cache created.
2025-12-09 23:36.41 ---> saved as "24e9e0478e37660a173aacfea6a455c5843bff85d9777ca68fde0015161147c4"

/home/opam: (run (shell "opam pin add -k version -yn conf-flint.3.0 3.0"))
conf-flint is now pinned to version 3.0
2025-12-09 23:36.44 ---> saved as "2de007fe841bcecea6f8a76a47395938555d14c9f79269250a587ac20501d95f"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall conf-flint.3.0;\
                        \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 \"\\\"centos-10\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'conf-flint.3.0' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
conf-flint.3.0 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 1 package
  - install conf-flint 3.0 (pinned)

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[ERROR] The compilation of conf-flint.3.0 failed at "sh -exc cc -c $CFLAGS -I/usr/local/include test.c".

#=== ERROR while compiling conf-flint.3.0 =====================================#
# context              2.5.0 | linux/x86_64 | ocaml-base-compiler.5.4.0 | pinned
# path                 ~/.opam/5.4/.opam-switch/build/conf-flint.3.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build sh -exc cc -c $CFLAGS -I/usr/local/include test.c
# exit-code            1
# env-file             ~/.opam/log/conf-flint-7-1037a1.env
# output-file          ~/.opam/log/conf-flint-7-1037a1.out
### output ###
# + cc -c -I/usr/local/include test.c
# test.c:1:15: fatal error: flint/flint.h: No such file or directory
#     1 |     #include  <flint/flint.h>
#       |               ^~~~~~~~~~~~~~~
# compilation terminated.



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build conf-flint 3.0
+- 
- No changes have been performed

<><> conf-flint.3.0 troubleshooting <><><><><><><><><><><><><><><><><><><><><><>
=> You can try to install conf-flint.1 which works with version 2 of the library
# To update the current shell environment, run: eval $(opam env)
[WARNING] OPAMCONFIRMLEVEL was ignored because CLI 2.0 was requested and it was introduced in 2.1.
[WARNING] OPAMCONFIRMLEVEL was ignored because CLI 2.0 was requested and it was introduced in 2.1.
"/usr/bin/env" "bash" "-c" "opam reinstall conf-flint.3.0;
        res=$?;
        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 "\"centos-10\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'conf-flint.3.0' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 1
2025-12-09 23:36.56: Job failed: Failed: Build failed
2025-12-09 23:36.56: Log analysis:
2025-12-09 23:36.56: >>> 
[ERROR] The compilation of conf-flint.3.0 failed at "sh -exc cc -c $CFLAGS -I/usr/local/include test.c".
 (score = 20)
2025-12-09 23:36.56: The compilation of conf-flint.3.0 failed at "sh -exc cc -c $CFLAGS -I/usr/local/include test.c".