(for PR #29228)

2026-01-16 20:32.22: 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-4.14-nnpchecker/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29228/head" && git reset --hard a35dbc8a
git fetch origin master
git merge --no-edit 92679ed61424ad5e3662cb5bba4effdd8f701363
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-4.14-nnpchecker@sha256:f5a43776921fa3f296208e5d4979a27d9dfe987cfd4e2c3f3322e342bbe16ba9
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn proven.0.9.0 0.9.0
RUN opam reinstall proven.0.9.0; \
    res=$?; \
    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 20:32.22: Using cache hint "ocaml/opam:debian-13-ocaml-4.14-nnpchecker@sha256:f5a43776921fa3f296208e5d4979a27d9dfe987cfd4e2c3f3322e342bbe16ba9-proven.0.9.0-a35dbc8a881d9411d03b2b822e4648d893342b2a"
2026-01-16 20:32.22: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-4.14-nnpchecker@sha256:f5a43776921fa3f296208e5d4979a27d9dfe987cfd4e2c3f3322e342bbe16ba9)
 (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 20:32.22: Waiting for resource in pool OCluster
2026-01-16 20:32.23: Waiting for worker…
2026-01-16 20:41.49: Got resource from pool OCluster
Building on laodoke.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-4.14-nnpchecker@sha256:f5a43776921fa3f296208e5d4979a27d9dfe987cfd4e2c3f3322e342bbe16ba9)
2026-01-16 20:42.28 ---> saved as "1eac976bdd33bd13ab0c8d610e2377f52f6d611e6efe8a23ec63f56cfdd2339e"

/: (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 20:42.28 ---> saved as "c378e0b9f91fe4885eb8fd702e31cce1578cd0270e14546468aa738d0072f1e4"

/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
2026-01-16 20:42.54 ---> saved as "adbf01b1617d4cf94ea07349a35f3a41fcd29695deebb73ce96d531e4d253b10"

/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                 71
# repositories         1 (version-controlled)
# pinned               1 (version)
# current-switch       4.14
# invariant            ["ocaml-options-only-nnpchecker"]
# compiler-packages    ocaml-option-nnpchecker.1, ocaml-options-only-nnpchecker.1, ocaml-variants.4.14.2+options
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/4.14/lib/ocaml/stublibs:/home/opam/.opam/4.14/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       4.14.2+options
2026-01-16 20:42.55 ---> saved as "d689103db08b41bbf11907b3c9801d961a52307d20676b123e61e6eee0455e2d"

/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 20:43.01 ---> saved as "d4bac4fb5635ab62a4c3041e9984ef57fbf797532136a5d1787dae7dc49affc2"

/home/opam: (copy (src .) (dst opam-repository/))
2026-01-16 20:43.11 ---> saved as "d76fd804e812d84973a605d84c75179efd6fb98e460b7a150764d8632e3a3d42"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-01-16 20:43.27 ---> saved as "a52fb5d94e656b5120d4057550a8e02f98b3d54d90351543a3dbc6bb574f35ed"

/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 (6801 kB/s)
- Reading package lists...
- 
2026-01-16 20:43.30 ---> saved as "56d38d10944cff37e9ef3ce9ef906cf7db817a63c77d15db567ed78f5d9c2df7"

/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 20:43.31 ---> saved as "cec084f66fe6d92e59371a41bf0fda494595922c1f1e1844e6ee4e8826fc8234"

/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-options-only-nnpchecker.1 | pinned(https://github.com/hyperpolymath/proven/archive/refs/tags/v0.9.0.tar.gz)
# path                 ~/.opam/4.14/.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-ad3eb5.env
# output-file          ~/.opam/log/proven-7-ad3eb5.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/4.14/.opam-switch/backup/state-20260116204331.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 20:44.05: Job failed: Failed: Build failed
2026-01-16 20:44.05: Log analysis:
2026-01-16 20:44.05: >>> 
[ERROR] The compilation of proven.0.9.0 failed at "dune subst".
 (score = 20)
2026-01-16 20:44.05: >>> 
# Error: Invalid first line, expected: (lang <lang> <version>)
 (score = 48)
2026-01-16 20:44.05: Invalid first line, expected: (lang <lang> <version>)