(for PR #29068)

2025-12-11 20:14.35: New job: build matcha.0.1.0, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29068/head (52abec3711367f750fe08ceba6ce2348a17e222e)
                              on macos-homebrew-ocaml-5.4/arm64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29068/head" && git reset --hard 52abec37
git fetch origin master
git merge --no-edit 810e1f14b7fa6411c66a3549f4c2aff47c52fc36
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM macos-homebrew-ocaml-5.4
USER 1000:1000
RUN ln -f ~/local/bin/opam-dev ~/local/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url -k local --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn matcha.0.1.0 0.1.0
RUN opam reinstall matcha.0.1.0; \
    res=$?; \
    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 "\"macos-homebrew\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'matcha.0.1.0' && partial_fails="$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 .

2025-12-11 20:14.35: Using cache hint "macos-homebrew-ocaml-5.4-matcha.0.1.0-52abec3711367f750fe08ceba6ce2348a17e222e"
2025-12-11 20:14.35: Using OBuilder spec:
((from macos-homebrew-ocaml-5.4)
 (user (uid 1000) (gid 1000))
 (run (shell "ln -f ~/local/bin/opam-dev ~/local/bin/opam"))
 (run (network host)
      (shell "opam init --reinit -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 -k local --strict default opam-repository/"))
 (run (network host)
      (shell "opam update --depexts || true"))
 (run (shell "opam pin add -k version -yn matcha.0.1.0 0.1.0"))
 (run (cache (opam-archives (target /Users/mac1000/.opam/download-cache)) (homebrew (target /Users/mac1000/Library/Caches/Homebrew)))
      (network host)
      (shell  "opam reinstall matcha.0.1.0;\
             \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 \"\\\"macos-homebrew\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'matcha.0.1.0' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2025-12-11 20:14.35: Waiting for resource in pool OCluster
2025-12-11 20:14.35: Waiting for worker…
2025-12-11 20:14.35: Got resource from pool OCluster
Building on m1-worker-04
Updating files:  63% (12158/19001)
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Updating files: 100% (19001/19001), done.
HEAD is now at 0bb49d3df2 Merge commit '930ccf4ba1d0f5a40a79f65257a2ca4594fdb42d'
HEAD is now at 810e1f14b7 Merge pull request #29066 from gares/release-elpi-v3.4.4
Updating 810e1f14b7..52abec3711
Fast-forward
 packages/matcha/matcha.0.1.0/opam | 40 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 packages/matcha/matcha.0.1.0/opam

(from macos-homebrew-ocaml-5.4)
2025-12-11 20:14.48 ---> using "338135fbf1889e924a607b47198b8b308c32a925cc9436066d65a9bdc402cad5" from cache

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

/: (run (shell "ln -f ~/local/bin/opam-dev ~/local/bin/opam"))
2025-12-11 20:14.48 ---> using "7aa34524ca0a69b4a488c30909f7495a04a243f9066091b1dfe73b446b0dfcd3" from cache

/: (run (network host)
        (shell "opam init --reinit -ni"))
No configuration file found, using 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 /Users/mac1000/.opam from version 2.1 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 1 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=1 --global
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] no changes from git+file:///Users/mac1000/opam-repository
2025-12-11 20:14.48 ---> using "91dcaa513ca3161d91620d0583acdea5310cd52ccab1dfbdd183600da37afdb2" from cache

/: (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=arm64 os=macos os-distribution=homebrew os-version=15.5
# solver               builtin-0install
# install-criteria     -changed,-count[avoid-version,solution]
# upgrade-criteria     -count[avoid-version,solution]
# jobs                 7
# repositories         1 (version-controlled)
# pinned               0
# current-switch       5.4.0
# invariant            ["ocaml-base-compiler" {= "5.4.0"} | "ocaml-system" {= "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       /Users/mac1000/.opam/5.4.0/lib/ocaml/stublibs:/Users/mac1000/.opam/5.4.0/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       5.4.0
2025-12-11 20:14.48 ---> using "cea1bfc0b1cda73d964aa2fc69cc828a6e6d8edd86f991754707e8b004a3cb09" from cache

/: (env OPAMDOWNLOADJOBS 1)

/: (env OPAMERRLOGLEN 0)

/: (env OPAMPRECISETRACKING 1)

/: (env CI true)

/: (env OPAM_REPO_CI true)

/: (run (shell "rm -rf opam-repository/"))
2025-12-11 20:14.49 ---> using "e3eba35b672d86e69268bbb9214f23a1f9d1fb0787b4d803840af8d45829b222" from cache

/: (copy (src .) (dst opam-repository/))
2025-12-11 20:14.53 ---> saved as "ed2eeeae143d40597ec657f088127dd7213cbb4151c75c31c8fc2b8569a74904"

/: (run (shell "opam repository set-url -k local --strict default opam-repository/"))
[default] Initialised
2025-12-11 20:15.03 ---> saved as "cca0729f3c09f2e46b5f4829d4b5c7433288be98f8ef0a128b0c3f0da3874708"

/: (run (network host)
        (shell "opam update --depexts || true"))
+ /opt/homebrew/bin/brew "update"
- ==> Updating Homebrew...
- ==> Homebrew collects anonymous analytics.
- Read the analytics documentation (and how to opt-out) here:
-   https://docs.brew.sh/Analytics
- No analytics have been recorded yet (nor will be during this `brew` run).
- 
- ==> Homebrew is run entirely by unpaid volunteers. Please consider donating:
-   https://github.com/Homebrew/brew#donations
- 
- Already up-to-date.
2025-12-11 20:15.20 ---> saved as "5f410b8982960283e1d1a6c4a107e75f28e5f38325102401e8e8b94b331932f3"

/: (run (shell "opam pin add -k version -yn matcha.0.1.0 0.1.0"))
matcha is now pinned to version 0.1.0
2025-12-11 20:15.21 ---> saved as "c3886043f11a95ff5e97449c3c0edfea9987d536c383365d0355ed6e69b51a37"

/: (run (cache (opam-archives (target /Users/mac1000/.opam/download-cache)) (homebrew (target /Users/mac1000/Library/Caches/Homebrew)))
        (network host)
        (shell  "opam reinstall matcha.0.1.0;\
               \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 \"\\\"macos-homebrew\\\"\"; then\
               \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
               \n          fi;\
               \n          test \"$pkg\" != 'matcha.0.1.0' && partial_fails=\"$partial_fails $pkg\";\
               \n        done;\
               \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
               \n        exit 1"))
matcha.0.1.0 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 18 packages
  - install cmdliner            1.3.0          [required by reason]
  - install cppo                1.8.0          [required by reason]
  - install dune                3.20.2         [required by matcha]
  - install dune-build-info     3.20.2         [required by reason]
  - install fix                 20250919       [required by reason]
  - install matcha              0.1.0 (pinned)
  - install menhir              20250912       [required by reason]
  - install menhirCST           20250912       [required by menhir]
  - install menhirLib           20250912       [required by menhir]
  - install menhirSdk           20250912       [required by menhir]
  - install merlin-extend       0.6.2          [required by reason]
  - install ocaml-compiler-libs v0.17.0        [required by ppxlib]
  - install ocamlfind           1.9.8          [required by reason]
  - install ppx_derivers        1.2.1          [required by ppxlib]
  - install ppxlib              0.37.0         [required by matcha]
  - install reason              3.17.2         [required by matcha]
  - install sexplib0            v0.17.0        [required by ppxlib]
  - install stdlib-shims        0.3.0          [required by ppxlib]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved cmdliner.1.3.0  (cached)
-> retrieved cppo.1.8.0  (cached)
-> retrieved dune.3.20.2, dune-build-info.3.20.2  (cached)
-> retrieved fix.20250919  (cached)
-> retrieved matcha.0.1.0  (cached)
-> retrieved menhir.20250912, menhirCST.20250912, menhirLib.20250912, menhirSdk.20250912  (cached)
-> installed cmdliner.1.3.0
-> retrieved merlin-extend.0.6.2  (cached)
-> retrieved ocaml-compiler-libs.v0.17.0  (cached)
-> retrieved ocamlfind.1.9.8  (cached)
-> retrieved ppx_derivers.1.2.1  (cached)
-> retrieved ppxlib.0.37.0  (cached)
-> retrieved reason.3.17.2  (cached)
-> retrieved sexplib0.v0.17.0  (cached)
-> retrieved stdlib-shims.0.3.0  (cached)
-> installed ocamlfind.1.9.8
-> installed dune.3.20.2
-> installed cppo.1.8.0
-> installed menhirCST.20250912
-> installed ppx_derivers.1.2.1
-> installed fix.20250919
-> installed merlin-extend.0.6.2
-> installed menhirSdk.20250912
-> installed stdlib-shims.0.3.0
-> installed ocaml-compiler-libs.v0.17.0
-> installed menhirLib.20250912
-> installed dune-build-info.3.20.2
-> installed sexplib0.v0.17.0
-> installed menhir.20250912
-> installed ppxlib.0.37.0
-> installed reason.3.17.2
[ERROR] The compilation of matcha.0.1.0 failed at "dune build -p matcha -j 7 @install".

#=== ERROR while compiling matcha.0.1.0 =======================================#
# context              2.5.0 | macos/arm64 | ocaml-base-compiler.5.4.0 | pinned(https://github.com/eldh/matcha/archive/refs/tags/v0.1.0.tar.gz)
# path                 ~/.opam/5.4.0/.opam-switch/build/matcha.0.1.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune build -p matcha -j 7 @install
# exit-code            1
# env-file             ~/.opam/log/matcha-84705-a1267a.env
# output-file          ~/.opam/log/matcha-84705-a1267a.out
### output ###
# (cd _build/default && /Users/mac1000/.opam/5.4.0/bin/ocamlc.opt -w -40 -g -bin-annot -bin-annot-occurrences -I ppx/.ppx_component.objs/byte -I /Users/mac1000/.opam/5.4.0/lib/ocaml-compiler-libs/common -I /Users/mac1000/.opam/5.4.0/lib/ocaml-compiler-libs/shadow -I /Users/mac1000/.opam/5.4.0/lib/ocaml/compiler-libs -I /Users/mac1000/.opam/5.4.0/lib/ppx_derivers -I /Users/mac1000/.opam/5.4.0/lib/ppxlib -I /Users/mac1000/.opam/5.4.0/lib/ppxlib/ast -I /Users/mac1000/.opam/5.4.0/lib/ppxlib/astlib -I /Users/mac1000/.opam/5.4.0/lib/ppxlib/print_diff -I /Users/mac1000/.opam/5.4.0/lib/ppxlib/stdppx -I /Users/mac1000/.opam/5.4.0/lib/ppxlib/traverse_builtins -I /Users/mac1000/.opam/5.4.0/lib/sexplib0 -I /Users/mac1000/.opam/5.4.0/lib/stdlib-shims -no-alias-deps -o ppx/.ppx_component.objs/byte/ppx_component.cmo -c -impl ppx/ppx_component.pp.ml)
# File "ppx/ppx_component.ml", line 125, characters 14-22:
# 125 |             | Pexp_fun (Labelled label, _default, pat, body) ->
#                     ^^^^^^^^
# Error: This variant pattern is expected to have type Ppxlib.expression_desc
#        There is no constructor Pexp_fun within type Ppxlib.expression_desc
# Hint:             Did you mean Pexp_for?



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build matcha 0.1.0
+- 
+- The following changes have been performed
| - install cmdliner            1.3.0
| - install cppo                1.8.0
| - install dune                3.20.2
| - install dune-build-info     3.20.2
| - install fix                 20250919
| - install menhir              20250912
| - install menhirCST           20250912
| - install menhirLib           20250912
| - install menhirSdk           20250912
| - install merlin-extend       0.6.2
| - install ocaml-compiler-libs v0.17.0
| - install ocamlfind           1.9.8
| - install ppx_derivers        1.2.1
| - install ppxlib              0.37.0
| - install reason              3.17.2
| - install sexplib0            v0.17.0
| - install stdlib-shims        0.3.0
+- 
# To update the current shell environment, run: eval $(opam env)

The former state can be restored with:
    /opt/homebrew/bin/opam switch import "/Users/mac1000/.opam/5.4.0/.opam-switch/backup/state-20251211201523.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 matcha.0.1.0;
        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 "\"macos-homebrew\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'matcha.0.1.0' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 1
2025-12-11 20:16.36: Job failed: Failed: Build failed
2025-12-11 20:16.36: Log analysis:
2025-12-11 20:16.36: >>> 
[ERROR] The compilation of matcha.0.1.0 failed at "dune build -p matcha -j 7 @install".
 (score = 20)
2025-12-11 20:16.36: >>> 
# Error: This variant pattern is expected to have type Ppxlib.expression_desc
 (score = 48)
2025-12-11 20:16.36: This variant pattern is expected to have type Ppxlib.expression_desc