(for PR #29068)

2025-12-11 20:14.34: New job: build matcha.0.1.0, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29068/head (52abec3711367f750fe08ceba6ce2348a17e222e)
                              on archlinux-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29068/head" && git reset --hard 52abec37
git fetch origin master
git merge --no-edit 810e1f14b7fa6411c66a3549f4c2aff47c52fc36
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:archlinux-ocaml-5.4@sha256:75cf28211fefc81633e787cbb4d25ca8298165ffd24d35a71cd7588c99cc7a1d
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn matcha.0.1.0 0.1.0
RUN opam reinstall matcha.0.1.0; \
    res=$?; \
    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 "\"archlinux\""; 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 20:14.34: Using cache hint "ocaml/opam:archlinux-ocaml-5.4@sha256:75cf28211fefc81633e787cbb4d25ca8298165ffd24d35a71cd7588c99cc7a1d-matcha.0.1.0-52abec3711367f750fe08ceba6ce2348a17e222e"
2025-12-11 20:14.34: Using OBuilder spec:
((from ocaml/opam:archlinux-ocaml-5.4@sha256:75cf28211fefc81633e787cbb4d25ca8298165ffd24d35a71cd7588c99cc7a1d)
 (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 matcha.0.1.0 0.1.0"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (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 \"\\\"archlinux\\\"\"; 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 20:14.34: Waiting for resource in pool OCluster
2025-12-11 20:22.08: Waiting for worker…
2025-12-11 20:24.34: Got resource from pool OCluster
Building on clete
All commits already cached
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 ocaml/opam:archlinux-ocaml-5.4@sha256:75cf28211fefc81633e787cbb4d25ca8298165ffd24d35a71cd7588c99cc7a1d)
2025-12-11 20:27.49 ---> using "8ae053cd7506328645930b23a9c4a2b989c1a8e9175aeb939ee993234da73280" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2025-12-11 20:27.49 ---> using "8be471d649bad8c697b610dee166f9c185702e4c3496585ba7bc3003d88830fd" from cache

/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.

Continue? [Y/n] y
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.

Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2025-12-11 20:27.49 ---> using "590299faf5fc8a3885dec9c9db37a24a75fe7471487e90aad6dd84e663f8cbf1" from cache

/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=arch os-version=20251019.0.436919
# 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
2025-12-11 20:27.49 ---> using "3a125f6c43f774c60a916c705716cf67629423cbf57d0718088cb2b3970be910" from cache

/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/"))
2025-12-11 20:27.49 ---> using "81e866fd6955aad3bce8dcc99061f337fbcaaa6bc1094ab741f36c77d9d7890a" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2025-12-11 20:28.01 ---> saved as "c80b4723c48924a3c78c205dcf951ff818cb927f2eb79c8618c952cd586746ed"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-12-11 20:28.27 ---> saved as "05cc6b22308cc2838c2dd0474ed96129fc5cf730761574e3fa8bef83fb8d74f2"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/sbin/sudo "pacman" "-Sy"
- :: Synchronizing package databases...
-  core downloading...
-  extra downloading...
2025-12-11 20:28.28 ---> saved as "985638eaacc4e73888cada80dbee83dc6905a8a13b1aa7b0b2bd2b83da4abfae"

/home/opam: (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 20:28.29 ---> saved as "c19c2f8426920a05d9743f9b2f2a128b177e318bd7e988bfc1acc3d06654fd01"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (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 \"\\\"archlinux\\\"\"; 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
  ∗ cmdliner            1.3.0          [required by reason]
  ∗ cppo                1.8.0          [required by reason]
  ∗ dune                3.20.2         [required by matcha]
  ∗ dune-build-info     3.20.2         [required by reason]
  ∗ fix                 20250919       [required by reason]
  ∗ matcha              0.1.0 (pinned)
  ∗ menhir              20250912       [required by reason]
  ∗ menhirCST           20250912       [required by menhir]
  ∗ menhirLib           20250912       [required by menhir]
  ∗ menhirSdk           20250912       [required by menhir]
  ∗ merlin-extend       0.6.2          [required by reason]
  ∗ ocaml-compiler-libs v0.17.0        [required by ppxlib]
  ∗ ocamlfind           1.9.8          [required by reason]
  ∗ ppx_derivers        1.2.1          [required by ppxlib]
  ∗ ppxlib              0.37.0         [required by matcha]
  ∗ reason              3.17.2         [required by matcha]
  ∗ sexplib0            v0.17.0        [required by ppxlib]
  ∗ 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)
⬇ 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)
∗ installed cmdliner.1.3.0
⬇ 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 stdlib-shims.0.3.0
∗ installed merlin-extend.0.6.2
∗ installed menhirSdk.20250912
∗ installed sexplib0.v0.17.0
∗ installed menhirLib.20250912
∗ installed dune-build-info.3.20.2
∗ installed ocaml-compiler-libs.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 71 @install".

#=== ERROR while compiling matcha.0.1.0 =======================================#
# context              2.5.0 | linux/x86_64 | ocaml-base-compiler.5.4.0 | pinned(https://github.com/eldh/matcha/archive/refs/tags/v0.1.0.tar.gz)
# path                 ~/.opam/5.4/.opam-switch/build/matcha.0.1.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune build -p matcha -j 71 @install
# exit-code            1
# env-file             ~/.opam/log/matcha-7-78da88.env
# output-file          ~/.opam/log/matcha-7-78da88.out
### output ###
# (cd _build/default && /home/opam/.opam/5.4/bin/ocamlc.opt -w -40 -g -bin-annot -bin-annot-occurrences -I ppx/.ppx_component.objs/byte -I /home/opam/.opam/5.4/lib/ocaml-compiler-libs/common -I /home/opam/.opam/5.4/lib/ocaml-compiler-libs/shadow -I /home/opam/.opam/5.4/lib/ocaml/compiler-libs -I /home/opam/.opam/5.4/lib/ppx_derivers -I /home/opam/.opam/5.4/lib/ppxlib -I /home/opam/.opam/5.4/lib/ppxlib/ast -I /home/opam/.opam/5.4/lib/ppxlib/astlib -I /home/opam/.opam/5.4/lib/ppxlib/print_diff -I /home/opam/.opam/5.4/lib/ppxlib/stdppx -I /home/opam/.opam/5.4/lib/ppxlib/traverse_builtins -I /home/opam/.opam/5.4/lib/sexplib0 -I /home/opam/.opam/5.4/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
│ λ 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:
    /usr/bin/opam switch import "/home/opam/.opam/5.4/.opam-switch/backup/state-20251211202830.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 "\"archlinux\""; 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 20:29.57: Job failed: Failed: Build failed
2025-12-11 20:29.57: Log analysis:
2025-12-11 20:29.57: >>> 
[ERROR] The compilation of matcha.0.1.0 failed at "dune build -p matcha -j 71 @install".
 (score = 20)
2025-12-11 20:29.57: >>> 
# Error: This variant pattern is expected to have type Ppxlib.expression_desc
 (score = 48)
2025-12-11 20:29.57: This variant pattern is expected to have type Ppxlib.expression_desc