(for PR #29228)

2026-01-16 20:32.21: New job: build proven.0.9.0, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29228/head (a35dbc8a881d9411d03b2b822e4648d893342b2a)
                              on debian-13-ocaml-5.0/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29228/head" && git reset --hard a35dbc8a
git fetch origin master
git merge --no-edit 92679ed61424ad5e3662cb5bba4effdd8f701363
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-5.0@sha256:54bbee126005951f0e70bdd55d24e44b560f630da6768ac62f8e636774aab0e4
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn proven.0.9.0 0.9.0
RUN opam reinstall proven.0.9.0; \
    res=$?; \
    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 "\"debian-13\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'proven.0.9.0' && partial_fails="$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 .

2026-01-16 20:32.21: Using cache hint "ocaml/opam:debian-13-ocaml-5.0@sha256:54bbee126005951f0e70bdd55d24e44b560f630da6768ac62f8e636774aab0e4-proven.0.9.0-a35dbc8a881d9411d03b2b822e4648d893342b2a"
2026-01-16 20:32.21: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.0@sha256:54bbee126005951f0e70bdd55d24e44b560f630da6768ac62f8e636774aab0e4)
 (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 proven.0.9.0 0.9.0"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall proven.0.9.0;\
             \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 \"\\\"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 \"$pkg\" != 'proven.0.9.0' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-01-16 20:32.21: Waiting for resource in pool OCluster
2026-01-16 20:32.23: Waiting for worker…
2026-01-16 20:34.26: Got resource from pool OCluster
Building on odawa.caelum.ci.dev
All commits already cached
HEAD is now at 92679ed614 Merge pull request #29220 from davesnx/release-server-reason-react-0.4.1
Updating 92679ed614..a35dbc8a88
Fast-forward
 packages/proven/proven.0.9.0/opam | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 packages/proven/proven.0.9.0/opam

(from ocaml/opam:debian-13-ocaml-5.0@sha256:54bbee126005951f0e70bdd55d24e44b560f630da6768ac62f8e636774aab0e4)
2026-01-16 20:35.04 ---> saved as "ddd37be92c9b56d281c587e661e20a8ee6777ba8c8eb0346c4be459788d39d65"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-01-16 20:35.04 ---> saved as "9af249e36e091516066ff3e8c60af672758505147d18effca2b7ee9863431916"

/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
2026-01-16 20:35.25 ---> saved as "184e1c6dd9f299b80ab8a79ec8cc56d263df6abfebd940122996b4e5489bb79b"

/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       5.0
# invariant            ["ocaml-base-compiler" {= "5.0.0"}]
# compiler-packages    ocaml-base-compiler.5.0.0, ocaml-options-vanilla.1
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/5.0/lib/ocaml/stublibs:/home/opam/.opam/5.0/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       5.0.0
2026-01-16 20:35.26 ---> saved as "ec1d6e1f0fb00e6e4bc136fea8c7b54f84752a4563623c19db1b1505493e895f"

/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/"))
2026-01-16 20:35.35 ---> saved as "e746d27cd65bf6f8c139fc63b72b0c98abb2ce6e37f94c13430793f27a2f25c4"

/home/opam: (copy (src .) (dst opam-repository/))
2026-01-16 20:35.40 ---> saved as "1a0b98f673f9ee21940e1209888f6cb70d05489934e619f900dfc55673c9453b"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-01-16 20:35.56 ---> saved as "2bb6ae5c216e952eabc1639e3f3ca46759b6125510462ecc0e7cd4ed93582ab7"

/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 [9670 kB]
- Get:5 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [95.9 kB]
- Fetched 9997 kB in 1s (11.0 MB/s)
- Reading package lists...
- 
2026-01-16 20:35.58 ---> saved as "92a5c4dbdc551b8e75c914b487117f4b1ba920918313b46d840291271cdcacde"

/home/opam: (run (shell "opam pin add -k version -yn proven.0.9.0 0.9.0"))
proven is now pinned to version 0.9.0
2026-01-16 20:35.59 ---> saved as "b89d53679a074b3839374651a576ad6a2b2702ef5c855a6de025b311e8a3b4ce"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall proven.0.9.0;\
                        \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 \"\\\"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 \"$pkg\" != 'proven.0.9.0' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))

<><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><>

proven.0.9.0 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 2 packages
  - install dune   3.21.0         [required by proven]
  - install proven 0.9.0 (pinned)

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved dune.3.21.0  (cached)
-> retrieved proven.0.9.0  (https://github.com/hyperpolymath/proven/archive/refs/tags/v0.9.0.tar.gz)
-> installed dune.3.21.0
[ERROR] The compilation of proven.0.9.0 failed at "dune subst".

#=== ERROR while compiling proven.0.9.0 =======================================#
# context              2.5.0 | linux/x86_64 | ocaml-base-compiler.5.0.0 | pinned(https://github.com/hyperpolymath/proven/archive/refs/tags/v0.9.0.tar.gz)
# path                 ~/.opam/5.0/.opam-switch/build/proven.0.9.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune subst
# exit-code            1
# env-file             ~/.opam/log/proven-7-dc1071.env
# output-file          ~/.opam/log/proven-7-dc1071.out
### output ###
# File "bindings/ocaml/dune-project", line 1, characters 0-35:
# 1 | ; SPDX-License-Identifier: PMPL-1.0
#     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
# Error: Invalid first line, expected: (lang <lang> <version>)



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build proven 0.9.0
+- 
+- The following changes have been performed
| - install dune 3.21.0
+- 
# 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/5.0/.opam-switch/backup/state-20260116203559.export"
[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 proven.0.9.0;
        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 "\"debian-13\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'proven.0.9.0' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 1
2026-01-16 20:36.25: Job failed: Failed: Build failed
2026-01-16 20:36.25: Log analysis:
2026-01-16 20:36.25: >>> 
[ERROR] The compilation of proven.0.9.0 failed at "dune subst".
 (score = 20)
2026-01-16 20:36.25: >>> 
# Error: Invalid first line, expected: (lang <lang> <version>)
 (score = 48)
2026-01-16 20:36.25: Invalid first line, expected: (lang <lang> <version>)