2026-01-12 14:12.44: New job: test ocaml-multicore/effects-examples https://github.com/ocaml-multicore/effects-examples.git#refs/heads/master (8a7e80dd29e68e2d05fe4b0399c8535a51f36395) (linux-x86_64:ubuntu-25.10-5.4_opam-2.5) Base: ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:9cbf3da9bfd77a10b23a729cefa9f882afad591e9ce96d8832affb9695de0ab3 Opam project build To reproduce locally: git clone --recursive "https://github.com/ocaml-multicore/effects-examples.git" -b "master" && cd "effects-examples" && git reset --hard 8a7e80dd cat > Dockerfile <<'END-OF-DOCKERFILE' FROM ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:9cbf3da9bfd77a10b23a729cefa9f882afad591e9ce96d8832affb9695de0ab3 # ubuntu-25.10-5.4_opam-2.5 USER 1000:1000 ENV CLICOLOR_FORCE="1" ENV OPAMCOLOR="always" WORKDIR /src RUN sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam RUN opam init --reinit -ni RUN uname -rs && opam exec -- ocaml -version && opam --version WORKDIR /src RUN sudo chown opam /src RUN cd ~/opam-repository && (git cat-file -e 7d22a58614c38be74d79ae6ef2b64994ca4ffef0 || git fetch origin master) && git reset -q --hard 7d22a58614c38be74d79ae6ef2b64994ca4ffef0 && git log --no-decorate -n1 --oneline && opam update -u COPY --chown=1000:1000 effects-examples.opam ./ RUN opam pin add -yn effects-examples.dev './' RUN echo '(lang dune 3.0)' > './dune-project' ENV DEPS="base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base cppo.1.8.0 csexp.1.5.2 dune.3.20.2 dune-configurator.3.20.2 lwt.6.0.0 multicont.1.0.3 ocaml.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-options-vanilla.1 ocamlfind.1.9.8 ocplib-endian.1.2" ENV CI="true" ENV OCAMLCI="true" RUN opam update --depexts && opam install --cli=2.5 --depext-only -y effects-examples.dev $DEPS RUN opam install $DEPS COPY --chown=1000:1000 . /src RUN opam exec -- dune build @install @check @runtest && rm -rf _build END-OF-DOCKERFILE docker build . END-REPRO-BLOCK 2026-01-12 14:12.44: Using cache hint "ocaml-multicore/effects-examples-ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:9cbf3da9bfd77a10b23a729cefa9f882afad591e9ce96d8832affb9695de0ab3-ubuntu-25.10-5.4_opam-2.5-3c40eed6e97307e7ea0e83d7ef25a649" 2026-01-12 14:12.44: Using OBuilder spec: ((from ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:9cbf3da9bfd77a10b23a729cefa9f882afad591e9ce96d8832affb9695de0ab3) (comment ubuntu-25.10-5.4_opam-2.5) (user (uid 1000) (gid 1000)) (env CLICOLOR_FORCE 1) (env OPAMCOLOR always) (workdir /src) (run (shell "sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam")) (run (shell "opam init --reinit -ni")) (run (shell "uname -rs && opam exec -- ocaml -version && opam --version")) (workdir /src) (run (shell "sudo chown opam /src")) (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "cd ~/opam-repository && (git cat-file -e 7d22a58614c38be74d79ae6ef2b64994ca4ffef0 || git fetch origin master) && git reset -q --hard 7d22a58614c38be74d79ae6ef2b64994ca4ffef0 && git log --no-decorate -n1 --oneline && opam update -u")) (copy (src effects-examples.opam) (dst ./)) (run (network host) (shell "opam pin add -yn effects-examples.dev './'")) (run (network host) (shell "echo '(lang dune 3.0)' > './dune-project'")) (env DEPS "base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base cppo.1.8.0 csexp.1.5.2 dune.3.20.2 dune-configurator.3.20.2 lwt.6.0.0 multicont.1.0.3 ocaml.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-options-vanilla.1 ocamlfind.1.9.8 ocplib-endian.1.2") (env CI true) (env OCAMLCI true) (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam update --depexts && opam install --cli=2.5 --depext-only -y effects-examples.dev $DEPS")) (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam install $DEPS")) (copy (src .) (dst /src)) (run (shell "opam exec -- dune build @install @check @runtest && rm -rf _build")) ) 2026-01-12 14:12.44: Waiting for resource in pool OCluster 2026-01-13 20:35.06: Waiting for worker… 2026-01-13 20:39.51: Got resource from pool OCluster Building on clete All commits already cached HEAD is now at 8a7e80d Merge pull request #44 from ocaml-multicore/multicont-1.0.3 (from ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:9cbf3da9bfd77a10b23a729cefa9f882afad591e9ce96d8832affb9695de0ab3) 2026-01-13 20:39.51 ---> using "2d3af8a2eb621494054029e85a3557d7609b364473df85d89e2f074564c464ef" from cache /: (comment ubuntu-25.10-5.4_opam-2.5) /: (user (uid 1000) (gid 1000)) /: (env CLICOLOR_FORCE 1) /: (env OPAMCOLOR always) /: (workdir /src) /src: (run (shell "sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam")) 2026-01-13 20:39.51 ---> using "564d88f7a87962dfeb6f5f53d8b8eeb863e6a3dd4e50380cdb5f3e64d911b9a3" from cache /src: (run (shell "opam init --reinit -ni")) Configuring from /home/opam/.opamrc and then 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 2026-01-13 20:39.51 ---> using "163bc07db16bfb613e84b924d498023109cbaac350b865dd2268aa75cade598d" from cache /src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version")) Linux 6.8.0-90-generic The OCaml toplevel, version 5.4.0 2.5.0 2026-01-13 20:39.51 ---> using "07c2e02348ae65c427555de33add9881be0018a6196a65f0104765793f022ec2" from cache /src: (workdir /src) /src: (run (shell "sudo chown opam /src")) 2026-01-13 20:39.51 ---> using "74120422c8add92672a5d3454fbf07b14e993b395e7d21f5a9d9561b29cda0b9" from cache /src: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "cd ~/opam-repository && (git cat-file -e 7d22a58614c38be74d79ae6ef2b64994ca4ffef0 || git fetch origin master) && git reset -q --hard 7d22a58614c38be74d79ae6ef2b64994ca4ffef0 && git log --no-decorate -n1 --oneline && opam update -u")) From https://github.com/ocaml/opam-repository * branch master -> FETCH_HEAD ee48e882f0..df0b753b90 master -> origin/master 7d22a58614 Merge pull request #29184 from raphael-proust/opam-publish-lwt.6.0.0 <><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><> [default] synchronised from git+file:///home/opam/opam-repository Already up-to-date. Nothing to do. # To update the current shell environment, run: eval $(opam env) 2026-01-13 20:39.51 ---> using "cc3a239bf74c69956b8b55fdd9509e156fcb12f9df416af4a94fb548496cb2b4" from cache /src: (copy (src effects-examples.opam) (dst ./)) 2026-01-13 20:39.52 ---> saved as "7bee3be1ebe6f7aa06984782be4bb67ed4eab909342fd5a8608b3348e6bff315" /src: (run (network host) (shell "opam pin add -yn effects-examples.dev './'")) [NOTE] Package effects-examples does not exist in opam repositories registered in the current switch. [effects-examples.dev] synchronised (file:///src) [WARNING] Failed checks on effects-examples package definition from source at file:///src: warning 68: Missing field 'license' effects-examples is now pinned to file:///src (version dev) 2026-01-13 20:39.55 ---> saved as "47bf8e9b11a6ce99d26d9794632fde94b200837e63c1b789ec849cd79e0c3a7e" /src: (run (network host) (shell "echo '(lang dune 3.0)' > './dune-project'")) 2026-01-13 20:39.55 ---> saved as "e04582b229a2edb4f866fa79968c5c36ad8a65debec313c95b6133f2fb6c16e1" /src: (env DEPS "base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base cppo.1.8.0 csexp.1.5.2 dune.3.20.2 dune-configurator.3.20.2 lwt.6.0.0 multicont.1.0.3 ocaml.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-options-vanilla.1 ocamlfind.1.9.8 ocplib-endian.1.2") /src: (env CI true) /src: (env OCAMLCI true) /src: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam update --depexts && opam install --cli=2.5 --depext-only -y effects-examples.dev $DEPS")) + /usr/bin/sudo "apt-get" "update" - Hit:1 http://archive.ubuntu.com/ubuntu questing InRelease - Get:2 http://archive.ubuntu.com/ubuntu questing-updates InRelease [136 kB] - Get:3 http://security.ubuntu.com/ubuntu questing-security InRelease [136 kB] - Get:4 http://archive.ubuntu.com/ubuntu questing-backports InRelease [133 kB] - Get:5 http://security.ubuntu.com/ubuntu questing-security/universe amd64 Packages [114 kB] - Get:6 http://security.ubuntu.com/ubuntu questing-security/main amd64 Packages [172 kB] - Get:7 http://archive.ubuntu.com/ubuntu questing-updates/restricted amd64 Packages [122 kB] - Get:8 http://archive.ubuntu.com/ubuntu questing-updates/main amd64 Packages [294 kB] - Get:9 http://security.ubuntu.com/ubuntu questing-security/restricted amd64 Packages [120 kB] - Get:10 http://archive.ubuntu.com/ubuntu questing-updates/multiverse amd64 Packages [1689 B] - Get:11 http://archive.ubuntu.com/ubuntu questing-updates/universe amd64 Packages [168 kB] - Get:12 http://archive.ubuntu.com/ubuntu questing-backports/universe amd64 Packages [666 B] - Fetched 1397 kB in 0s (6342 kB/s) - Reading package lists... - <><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><> [effects-examples.dev] synchronised (file:///src) [NOTE] Package ocaml-options-vanilla is already installed (current version is 1). [NOTE] Package ocaml-config is already installed (current version is 3). [NOTE] Package ocaml-compiler is already installed (current version is 5.4.0). [NOTE] Package ocaml-base-compiler is already installed (current version is 5.4.0). [NOTE] Package ocaml is already installed (current version is 5.4.0). [NOTE] Package base-unix is already installed (current version is base). [NOTE] Package base-threads is already installed (current version is base). [NOTE] Package base-nnp is already installed (current version is base). [NOTE] Package base-effects is already installed (current version is base). [NOTE] Package base-domains is already installed (current version is base). [NOTE] Package base-bigarray is already installed (current version is base). # To update the current shell environment, run: eval $(opam env) 2026-01-13 20:40.15 ---> saved as "9e6a0f2ecf034e26725cc790ced91a685b7fe0ff752285062dda3da8cdde38d0" /src: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam install $DEPS")) [NOTE] Package ocaml-options-vanilla is already installed (current version is 1). [NOTE] Package ocaml-config is already installed (current version is 3). [NOTE] Package ocaml-compiler is already installed (current version is 5.4.0). [NOTE] Package ocaml-base-compiler is already installed (current version is 5.4.0). [NOTE] Package ocaml is already installed (current version is 5.4.0). [NOTE] Package base-unix is already installed (current version is base). [NOTE] Package base-threads is already installed (current version is base). [NOTE] Package base-nnp is already installed (current version is base). [NOTE] Package base-effects is already installed (current version is base). [NOTE] Package base-domains is already installed (current version is base). [NOTE] Package base-bigarray is already installed (current version is base). The following actions will be performed: === install 9 packages - install base-bytes base - install cppo 1.8.0 - install csexp 1.5.2 - install dune 3.20.2 - install dune-configurator 3.20.2 - install lwt 6.0.0 - install multicont 1.0.3 - install ocamlfind 1.9.8 - install ocplib-endian 1.2 <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><> -> retrieved cppo.1.8.0 (cached) -> retrieved csexp.1.5.2 (cached) -> retrieved multicont.1.0.3 (cached) -> retrieved lwt.6.0.0 (cached) -> retrieved ocamlfind.1.9.8 (cached) -> retrieved ocplib-endian.1.2 (cached) -> retrieved dune.3.20.2, dune-configurator.3.20.2 (cached) -> installed ocamlfind.1.9.8 -> installed base-bytes.base -> installed dune.3.20.2 -> installed csexp.1.5.2 -> installed cppo.1.8.0 -> installed ocplib-endian.1.2 -> installed dune-configurator.3.20.2 [ERROR] The compilation of multicont.1.0.3 failed at "dune build -p multicont -j 71 @install". -> installed lwt.6.0.0 #=== ERROR while compiling multicont.1.0.3 ====================================# # context 2.5.0 | linux/x86_64 | ocaml-base-compiler.5.4.0 | git+file:///home/opam/opam-repository # path ~/.opam/5.4/.opam-switch/build/multicont.1.0.3 # command ~/.opam/5.4/bin/dune build -p multicont -j 71 @install # exit-code 1 # env-file ~/.opam/log/multicont-1-7e63f8.env # output-file ~/.opam/log/multicont-1-7e63f8.out ### output ### # File "lib/dune", lines 1-14, characters 0-317: # 1 | (library # 2 | (name multicont) # 3 | (public_name multicont) # .... # 12 | (mode native) # 13 | (flags :standard (:include c_native_flags.sexp)) # 14 | (names multicont_stubs))) # (cd _build/default && /home/opam/.opam/5.4/bin/ocamlopt.opt -w -40 -g -shared -linkall -I lib -o lib/multicont.cmxs lib/multicont.cmxa) # /usr/bin/ld: cannot find -lmulticont_stubs_native: No such file or directory # collect2: error: ld returned 1 exit status # File "caml_startup", line 1: # Error: Error during linking (exit code 1) <><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> +- The following actions failed | - build multicont 1.0.3 +- +- The following changes have been performed | - install base-bytes base | - install cppo 1.8.0 | - install csexp 1.5.2 | - install dune 3.20.2 | - install dune-configurator 3.20.2 | - install lwt 6.0.0 | - install ocamlfind 1.9.8 | - install ocplib-endian 1.2 +- # 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-20260113204016.export" "/usr/bin/env" "bash" "-c" "opam install $DEPS" failed with exit status 31 2026-01-13 20:41.45: Job failed: Failed: Build failed