(for PR #29582)

2026-03-25 08:40.01: New job: build ocaml-option-llvm.1, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29582/head (fa5fb3a6a806e832e4c7791145889a6bbe8b64ef)
                              on debian-13-ocaml-5.4-no-flat-float-array/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29582/head" && git reset --hard fa5fb3a6
git fetch origin master
git merge --no-edit 7216d2e0eb5d8d116434228a0b19a267b98e8510
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:3ada8cd86e83cec71a3cf57e754d6074776a8db5d2233b5b677dc13fd112224e
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn ocaml-option-llvm.1 1
RUN opam reinstall ocaml-option-llvm.1; \
    res=$?; \
    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 "$pkg" != 'ocaml-option-llvm.1' && partial_fails="$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 .

2026-03-25 08:40.01: Using cache hint "ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:3ada8cd86e83cec71a3cf57e754d6074776a8db5d2233b5b677dc13fd112224e-ocaml-option-llvm.1-fa5fb3a6a806e832e4c7791145889a6bbe8b64ef"
2026-03-25 08:40.01: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:3ada8cd86e83cec71a3cf57e754d6074776a8db5d2233b5b677dc13fd112224e)
 (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-option-llvm.1 1"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall ocaml-option-llvm.1;\
             \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 \"$pkg\" != 'ocaml-option-llvm.1' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-03-25 08:40.01: Waiting for resource in pool OCluster
2026-03-25 09:10.22: Waiting for worker…
2026-03-25 09:14.01: Got resource from pool OCluster
Building on odawa.caelum.ci.dev
All commits already cached
HEAD is now at 7216d2e0eb Merge pull request #29593 from arvidj/aj/avoid-passage-0-3-2-3
Merge made by the 'ort' strategy.
 packages/ocaml-compiler/ocaml-compiler.5.3.0/opam      |  5 ++++-
 packages/ocaml-compiler/ocaml-compiler.5.3/opam        |  5 ++++-
 packages/ocaml-compiler/ocaml-compiler.5.4.0/opam      |  5 ++++-
 .../ocaml-compiler/ocaml-compiler.5.4.0~alpha1/opam    |  5 ++++-
 .../ocaml-compiler/ocaml-compiler.5.4.0~beta1/opam     |  5 ++++-
 .../ocaml-compiler/ocaml-compiler.5.4.0~beta2/opam     |  5 ++++-
 packages/ocaml-compiler/ocaml-compiler.5.4.0~rc1/opam  |  5 ++++-
 packages/ocaml-compiler/ocaml-compiler.5.4.1/opam      |  5 ++++-
 packages/ocaml-compiler/ocaml-compiler.5.4/opam        |  5 ++++-
 .../ocaml-compiler/ocaml-compiler.5.5.0~alpha1/opam    |  5 ++++-
 packages/ocaml-compiler/ocaml-compiler.5.5/opam        |  5 ++++-
 packages/ocaml-compiler/ocaml-compiler.5.6/opam        |  5 ++++-
 packages/ocaml-option-llvm/ocaml-option-llvm.1/opam    | 18 ++++++++++++++++++
 .../ocaml-options-vanilla/ocaml-options-vanilla.1/opam |  1 +
 packages/ocaml-variants/ocaml-variants.5.2.0+msvc/opam |  2 ++
 15 files changed, 69 insertions(+), 12 deletions(-)
 create mode 100644 packages/ocaml-option-llvm/ocaml-option-llvm.1/opam

(from ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array@sha256:3ada8cd86e83cec71a3cf57e754d6074776a8db5d2233b5b677dc13fd112224e)
2026-03-25 09:14.42 ---> saved as "86fe993977cadad4b21cfa840e6dfb5b99f106e1130ecc565d5821717091059d"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-03-25 09:14.42 ---> saved as "33f176a665d1111b9c5f22d65a4918017999f59d91d0783646fe0aa5df139a47"

/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
2026-03-25 09:15.05 ---> saved as "c46234bdc09404d769dded661c794fb487f1203ddb6db05b7aca5b5afea98286"

/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=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       5.4
# invariant            ["ocaml-variants" {= "5.4.0+options"}]
# compiler-packages    ocaml-compiler.5.4.0, ocaml-option-no-flat-float-array.1, ocaml-options-only-no-flat-float-array.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+no-flat-float-array
2026-03-25 09:15.05 ---> saved as "1d96fac9dd1a52ed797e00992d5e4e65fd6a7e48c71e7ae1a289129acb60abf1"

/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/"))
2026-03-25 09:15.16 ---> saved as "eae096a2140d7585f7f39bfac4e05bc630d4450467ed79811fb8c4fa8d58a9fe"

/home/opam: (copy (src .) (dst opam-repository/))
2026-03-25 09:15.28 ---> saved as "1c78c62648ab7c571a0287966d6f11e79b7d01a6fbc848a198f38e5c95e10930"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-03-25 09:15.45 ---> saved as "a568f267cc105b5613d597a7a515a420cb36abecb33c62a1c14375d5b09a7e7a"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Get:1 http://deb.debian.org/debian trixie InRelease [140 kB]
- 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 trixie/main amd64 Packages [9671 kB]
- Get:5 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [114 kB]
- Fetched 10.0 MB in 1s (10.6 MB/s)
- Reading package lists...
- 
2026-03-25 09:15.47 ---> saved as "25b838ab25458974e9378b70feed6b07058ce71f9bff4ab15f2f9c47ced23f87"

/home/opam: (run (shell "opam pin add -k version -yn ocaml-option-llvm.1 1"))
ocaml-option-llvm is now pinned to version 1
2026-03-25 09:15.48 ---> saved as "286a81afb19dbc0a9bd9a2e6e04f52c5e41e4f729062ffe0691c242145926712"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall ocaml-option-llvm.1;\
                        \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 \"$pkg\" != 'ocaml-option-llvm.1' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
ocaml-option-llvm.1 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== recompile 8 packages
  - recompile base-domains      base                   [uses ocaml]
  - recompile base-effects      base                   [uses ocaml]
  - recompile base-nnp          base                   [uses base-domains]
  - recompile ocaml             5.4.0                  [uses ocaml-variants]
  - recompile ocaml-compiler    5.4.0                  [uses ocaml-option-llvm]
  - recompile ocaml-config      3                      [uses ocaml-variants]
  - recompile ocaml-variants    5.4.0+options (pinned) [uses ocaml-compiler]
  - recompile opam-depext       1.2.3                  [uses ocaml]
=== install 1 package
  - install   ocaml-option-llvm 1 (pinned)

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved ocaml-compiler.5.4.0  (cached)
-> retrieved ocaml-config.3  (cached)
-> removed   base-effects.base
-> removed   base-nnp.base
-> removed   base-domains.base
-> installed ocaml-option-llvm.1
-> retrieved opam-depext.1.2.3  (cached)
-> removed   opam-depext.1.2.3
-> removed   ocaml.5.4.0
-> removed   ocaml-config.3
-> removed   ocaml-variants.5.4.0+options
-> removed   ocaml-compiler.5.4.0
[ERROR] The compilation of ocaml-compiler.5.4.0 failed at "./configure --prefix=/home/opam/.opam/5.4 --docdir=/home/opam/.opam/5.4/doc/ocaml -C --disable-flat-float-array CC=clang --disable-warn-error".

#=== ERROR while compiling ocaml-compiler.5.4.0 ===============================#
# context              2.5.0 | linux/x86_64 |  | file:///home/opam/opam-repository
# path                 ~/.opam/5.4/.opam-switch/build/ocaml-compiler.5.4.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build ./configure --prefix=/home/opam/.opam/5.4 --docdir=/home/opam/.opam/5.4/doc/ocaml -C --disable-flat-float-array CC=clang --disable-warn-error
# exit-code            77
# env-file             ~/.opam/log/ocaml-compiler-7-ae236f.env
# output-file          ~/.opam/log/ocaml-compiler-7-ae236f.out
### output ###
# configure: creating cache config.cache
# configure: Configuring OCaml version 5.4.0
# checking build system type... x86_64-pc-linux-gnu
# checking host system type... x86_64-pc-linux-gnu
# checking target system type... x86_64-pc-linux-gnu
# checking for csc... no
# checking for ld... ld
# checking how to print strings... printf
# checking for gcc... clang
# checking whether the C compiler works... no
# configure: error: in `/home/opam/.opam/5.4/.opam-switch/build/ocaml-compiler.5.4.0':
# configure: error: C compiler cannot create executables
# See `config.log' for more details



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build ocaml-compiler 5.4.0
+- 
+- The following changes have been performed (the rest was aborted)
| - remove  base-domains      base
| - remove  base-effects      base
| - remove  base-nnp          base
| - remove  ocaml             5.4.0
| - remove  ocaml-compiler    5.4.0
| - remove  ocaml-config      3
| - remove  ocaml-variants    5.4.0+options
| - remove  opam-depext       1.2.3
| - install ocaml-option-llvm 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-20260325091548.export"
Or you can retry to install your package selection with:
    /usr/bin/opam install --restore
[WARNING] OPAMCONFIRMLEVEL was ignored because CLI 2.0 was requested and it was introduced in 2.1.
"/usr/bin/env" "bash" "-c" "opam reinstall ocaml-option-llvm.1;
        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 "$pkg" != 'ocaml-option-llvm.1' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 1
2026-03-25 09:15.58: Job failed: Failed: Build failed
2026-03-25 09:15.58: Log analysis:
2026-03-25 09:15.58: >>> 
[ERROR] The compilation of ocaml-compiler.5.4.0 failed at "./configure --prefix=/home/opam/.opam/5.4 --docdir=/home/opam/.opam/5.4/doc/ocaml -C --disable-flat-float-array CC=clang --disable-warn-error".
 (score = 20)
2026-03-25 09:15.58: >>> 
# configure: error: in `/home/opam/.opam/5.4/.opam-switch/build/ocaml-compiler.5.4.0':
 (score = 30)
2026-03-25 09:15.58: in `/home/opam/.opam/5.4/.opam-switch/build/ocaml-compiler.5.4.0':