2025-10-10 20:14.18: New job: test ocaml-multicore/eio https://github.com/ocaml-multicore/eio.git#refs/pull/821/head (0583ff65d78090bab2c7090dde13da97c51dc252) (linux-x86_64:alpine-3.22-5.3_opam-2.4) Base: ocaml/opam:alpine-3.22-ocaml-5.3@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb Opam project build To reproduce locally: git clone --recursive "https://github.com/ocaml-multicore/eio.git" && cd "eio" && git fetch origin "refs/pull/821/head" && git reset --hard 0583ff65 cat > Dockerfile <<'END-OF-DOCKERFILE' FROM ocaml/opam:alpine-3.22-ocaml-5.3@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb # alpine-3.22-5.3_opam-2.4 USER 1000:1000 ENV CLICOLOR_FORCE="1" ENV OPAMCOLOR="always" WORKDIR /src RUN sudo ln -f /usr/bin/opam-2.4 /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 6fab318652edf2e934926c95dbe83c86f899f133 || git fetch origin master) && git reset -q --hard 6fab318652edf2e934926c95dbe83c86f899f133 && git log --no-decorate -n1 --oneline && opam update -u COPY --chown=1000:1000 eio_windows.opam eio_posix.opam eio_main.opam eio_linux.opam eio.opam ./ RUN opam pin add -yn eio_windows.dev './' && \ opam pin add -yn eio_posix.dev './' && \ opam pin add -yn eio_main.dev './' && \ opam pin add -yn eio_linux.dev './' && \ opam pin add -yn eio.dev './' RUN echo '(lang dune 3.0)' > './dune-project' ENV DEPS="afl-persistent.1.4 alcotest.1.9.1 astring.0.8.5 backoff.0.1.1 base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base bigstringaf.0.10.0 camlp-streams.5.0.1 cmdliner.2.0.0 conf-bash.1 containers.3.16 cppo.1.8.0 crowbar.0.2.1 csexp.1.5.2 cstruct.6.2.0 domain-local-await.1.0.1 domain-local-timeout.1.0.1 dscheck.0.5.0 dune.3.20.2 dune-configurator.3.20.2 either.1.0.0 fmt.0.11.0 hmap.0.8.1 iomux.0.4 kcas.0.7.0 logs.0.9.0 lwt-dllist.1.1.0 mdx.2.5.1 mtime.2.1.0 multicore-magic.2.3.1 ocaml.5.3.0 ocaml-base-compiler.5.3.0 ocaml-compiler.5.3.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocaml-version.4.0.3 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 optint.0.3.0 oseq.0.5.1 psq.0.2.1 re.1.14.0 result.1.5 seq.base stdlib-shims.0.3.0 thread-table.1.0.0 topkg.1.1.0 tsort.2.2.0 uring.2.7.0 uutf.1.0.4 yojson.3.0.0" ENV CI="true" ENV OCAMLCI="true" RUN opam update --depexts && opam install --cli=2.4 --depext-only -y eio_windows.dev eio_posix.dev eio_main.dev eio_linux.dev eio.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 2025-10-10 20:14.18: Using cache hint "ocaml-multicore/eio-ocaml/opam:alpine-3.22-ocaml-5.3@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb-alpine-3.22-5.3_opam-2.4-d6f9512a35c9e14e487bcd8fc4c28725" 2025-10-10 20:14.18: Using OBuilder spec: ((from ocaml/opam:alpine-3.22-ocaml-5.3@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb) (comment alpine-3.22-5.3_opam-2.4) (user (uid 1000) (gid 1000)) (env CLICOLOR_FORCE 1) (env OPAMCOLOR always) (workdir /src) (run (shell "sudo ln -f /usr/bin/opam-2.4 /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 6fab318652edf2e934926c95dbe83c86f899f133 || git fetch origin master) && git reset -q --hard 6fab318652edf2e934926c95dbe83c86f899f133 && git log --no-decorate -n1 --oneline && opam update -u")) (copy (src eio_windows.opam eio_posix.opam eio_main.opam eio_linux.opam eio.opam) (dst ./)) (run (network host) (shell "opam pin add -yn eio_windows.dev './' && \ \nopam pin add -yn eio_posix.dev './' && \ \nopam pin add -yn eio_main.dev './' && \ \nopam pin add -yn eio_linux.dev './' && \ \nopam pin add -yn eio.dev './'")) (run (network host) (shell "echo '(lang dune 3.0)' > './dune-project'")) (env DEPS "afl-persistent.1.4 alcotest.1.9.1 astring.0.8.5 backoff.0.1.1 base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base bigstringaf.0.10.0 camlp-streams.5.0.1 cmdliner.2.0.0 conf-bash.1 containers.3.16 cppo.1.8.0 crowbar.0.2.1 csexp.1.5.2 cstruct.6.2.0 domain-local-await.1.0.1 domain-local-timeout.1.0.1 dscheck.0.5.0 dune.3.20.2 dune-configurator.3.20.2 either.1.0.0 fmt.0.11.0 hmap.0.8.1 iomux.0.4 kcas.0.7.0 logs.0.9.0 lwt-dllist.1.1.0 mdx.2.5.1 mtime.2.1.0 multicore-magic.2.3.1 ocaml.5.3.0 ocaml-base-compiler.5.3.0 ocaml-compiler.5.3.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocaml-version.4.0.3 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 optint.0.3.0 oseq.0.5.1 psq.0.2.1 re.1.14.0 result.1.5 seq.base stdlib-shims.0.3.0 thread-table.1.0.0 topkg.1.1.0 tsort.2.2.0 uring.2.7.0 uutf.1.0.4 yojson.3.0.0") (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=2.4 --depext-only -y eio_windows.dev eio_posix.dev eio_main.dev eio_linux.dev eio.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")) ) 2025-10-10 20:14.18: Waiting for resource in pool OCluster 2025-10-10 21:06.22: Waiting for worker… 2025-10-10 21:09.03: Got resource from pool OCluster Building on eumache All commits already cached HEAD is now at 0583ff6 Fix exception context (from ocaml/opam:alpine-3.22-ocaml-5.3@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb) Unable to find image 'ocaml/opam:alpine-3.22-ocaml-5.3@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb' locally docker.io/ocaml/opam@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb: Pulling from ocaml/opam 8c592723c59a: Already exists 918ef8500d6d: Already exists 6ad5dcb5418b: Already exists f02523008125: Already exists 717bcf0e7179: Already exists d458e5376246: Already exists 0eb41f67cb6b: Already exists Digest: sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb Status: Downloaded newer image for ocaml/opam@sha256:f501424e898b9ffd369a23e97280207e9a7234cff46e3a314f30c7826d92accb 2025-10-10 21:09.04 ---> using "8f6725b8b163d90d30de9c8c5e177342b07667db3354753a70bac272bfe2db9a" from cache /: (comment alpine-3.22-5.3_opam-2.4) /: (user (uid 1000) (gid 1000)) /: (env CLICOLOR_FORCE 1) /: (env OPAMCOLOR always) /: (workdir /src) /src: (run (shell "sudo ln -f /usr/bin/opam-2.4 /usr/bin/opam")) 2025-10-10 21:09.04 ---> using "60019b56f0ac74bc487e6a10b94f217078fa011d487a7997fa89d230b8fe3f32" 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 [NOTE] The 'jobs' option was reset, its value was 255 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=255 --global Format upgrade done. <><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><> [default] Initialised 2025-10-10 21:09.04 ---> using "c7cb638e7bebf3467944086dced2eb9f0c9b58d22b77655b91aec66202bcf666" from cache /src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version")) Linux 5.15.0-131-generic The OCaml toplevel, version 5.3.0 2.4.1 2025-10-10 21:09.04 ---> using "5af03bae8557c8c98fd3e2ecd3885ecd1490b81dcd2aa79041a221f15d3c966b" from cache /src: (workdir /src) /src: (run (shell "sudo chown opam /src")) 2025-10-10 21:09.04 ---> using "5bd0e598f405f99fe9f4df6e79f9f9a0efe772994aa367852a5bf2612bd3eb66" from cache /src: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "cd ~/opam-repository && (git cat-file -e 6fab318652edf2e934926c95dbe83c86f899f133 || git fetch origin master) && git reset -q --hard 6fab318652edf2e934926c95dbe83c86f899f133 && git log --no-decorate -n1 --oneline && opam update -u")) From https://github.com/ocaml/opam-repository * branch master -> FETCH_HEAD bcac5d1731..4b164c25f6 master -> origin/master 6fab318652 Merge pull request #28690 from mtelvers/opam-publish-ocaml-version.4.0.3 <><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><> [default] synchronised from git+file:///home/opam/opam-repository Everything as up-to-date as possible (run with --verbose to show unavailable upgrades). However, you may "opam upgrade" these packages explicitly at these versions (e.g. "opam upgrade ocaml-base-compiler.5.4.0"), which will ask permission to downgrade or uninstall the conflicting packages. Nothing to do. # To update the current shell environment, run: eval $(opam env) 2025-10-10 21:09.04 ---> using "03ccef20fc7c5e727d661dc87db69657e882cf1191a40e191a42877276deab3e" from cache /src: (copy (src eio_windows.opam eio_posix.opam eio_main.opam eio_linux.opam eio.opam) (dst ./)) 2025-10-10 21:09.04 ---> using "26b7ed78120bf359b976f8d67b4345dd9515c41fecb9ab972d66f4a1987f1136" from cache /src: (run (network host) (shell "opam pin add -yn eio_windows.dev './' && \ \nopam pin add -yn eio_posix.dev './' && \ \nopam pin add -yn eio_main.dev './' && \ \nopam pin add -yn eio_linux.dev './' && \ \nopam pin add -yn eio.dev './'")) [eio_windows.dev] synchronised (file:///src) eio_windows is now pinned to file:///src (version dev) [eio_posix.dev] synchronised (file:///src) eio_posix is now pinned to file:///src (version dev) [eio_main.dev] synchronised (file:///src) eio_main is now pinned to file:///src (version dev) [eio_linux.dev] synchronised (file:///src) eio_linux is now pinned to file:///src (version dev) [eio.dev] synchronised (file:///src) eio is now pinned to file:///src (version dev) 2025-10-10 21:09.22 ---> saved as "9ec364cb69cbd8d2bee61fb8566f522f528f7b3961b0f4ae9c46624f46727105" /src: (run (network host) (shell "echo '(lang dune 3.0)' > './dune-project'")) 2025-10-10 21:09.22 ---> saved as "405bdc7c982bdc533c8989cfc0801dabeaf131e95b7f1dc285e12219d4098baf" /src: (env DEPS "afl-persistent.1.4 alcotest.1.9.1 astring.0.8.5 backoff.0.1.1 base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base bigstringaf.0.10.0 camlp-streams.5.0.1 cmdliner.2.0.0 conf-bash.1 containers.3.16 cppo.1.8.0 crowbar.0.2.1 csexp.1.5.2 cstruct.6.2.0 domain-local-await.1.0.1 domain-local-timeout.1.0.1 dscheck.0.5.0 dune.3.20.2 dune-configurator.3.20.2 either.1.0.0 fmt.0.11.0 hmap.0.8.1 iomux.0.4 kcas.0.7.0 logs.0.9.0 lwt-dllist.1.1.0 mdx.2.5.1 mtime.2.1.0 multicore-magic.2.3.1 ocaml.5.3.0 ocaml-base-compiler.5.3.0 ocaml-compiler.5.3.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocaml-version.4.0.3 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 optint.0.3.0 oseq.0.5.1 psq.0.2.1 re.1.14.0 result.1.5 seq.base stdlib-shims.0.3.0 thread-table.1.0.0 topkg.1.1.0 tsort.2.2.0 uring.2.7.0 uutf.1.0.4 yojson.3.0.0") /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=2.4 --depext-only -y eio_windows.dev eio_posix.dev eio_main.dev eio_linux.dev eio.dev $DEPS")) + /usr/bin/sudo "apk" "update" - fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/main/x86_64/APKINDEX.tar.gz - fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/community/x86_64/APKINDEX.tar.gz - fetch https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz - fetch https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz - fetch https://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz - v3.22.2-8-g80b250e1ac9 [https://dl-cdn.alpinelinux.org/alpine/v3.22/main] - v3.22.2-14-g1d3648446f4 [https://dl-cdn.alpinelinux.org/alpine/v3.22/community] - v3.23.0_alpha20250612-7922-g052db120ba3 [https://dl-cdn.alpinelinux.org/alpine/edge/main] - v3.23.0_alpha20250612-7921-g847f8740383 [https://dl-cdn.alpinelinux.org/alpine/edge/community] - v3.23.0_alpha20250612-7923-g22b2ac68a01 [https://dl-cdn.alpinelinux.org/alpine/edge/testing] - OK: 59496 distinct packages available <><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><> [eio.dev] synchronised (file:///src) [eio_linux.dev] synchronised (file:///src) [eio_main.dev] synchronised (file:///src) [eio_posix.dev] synchronised (file:///src) [eio_windows.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 5.3.0). [NOTE] Package ocaml-base-compiler is already installed (current version is 5.3.0). [NOTE] Package ocaml is already installed (current version is 5.3.0). [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 system packages will first need to be installed: linux-headers <><> Handling external dependencies <><><><><><><><><><><><><><><><><><><><><><> + /usr/bin/sudo "apk" "add" "linux-headers" - (1/1) Installing linux-headers (6.14.2-r0) - OK: 313 MiB in 104 packages 2025-10-10 21:09.51 ---> saved as "962de60224f33518106f43e5248713f2a66b5727a791dce1687acb1ff204ba83" /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 5.3.0). [NOTE] Package ocaml-base-compiler is already installed (current version is 5.3.0). [NOTE] Package ocaml is already installed (current version is 5.3.0). [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 47 packages - install afl-persistent 1.4 - install alcotest 1.9.1 - install astring 0.8.5 - install backoff 0.1.1 - install base-bytes base - install bigstringaf 0.10.0 - install camlp-streams 5.0.1 - install cmdliner 2.0.0 - install conf-bash 1 - install containers 3.16 - install cppo 1.8.0 - install crowbar 0.2.1 - install csexp 1.5.2 - install cstruct 6.2.0 - install domain-local-await 1.0.1 - install domain-local-timeout 1.0.1 - install dscheck 0.5.0 - install dune 3.20.2 - install dune-configurator 3.20.2 - install either 1.0.0 - install fmt 0.11.0 - install hmap 0.8.1 - install iomux 0.4 - install kcas 0.7.0 - install logs 0.9.0 - install lwt-dllist 1.1.0 - install mdx 2.5.1 - install mtime 2.1.0 - install multicore-magic 2.3.1 - install ocaml-syntax-shims 1.0.0 - install ocaml-version 4.0.3 - install ocamlbuild 0.16.1 - install ocamlfind 1.9.8 - install ocplib-endian 1.2 - install optint 0.3.0 - install oseq 0.5.1 - install psq 0.2.1 - install re 1.14.0 - install result 1.5 - install seq base - install stdlib-shims 0.3.0 - install thread-table 1.0.0 - install topkg 1.1.0 - install tsort 2.2.0 - install uring 2.7.0 - install uutf 1.0.4 - install yojson 3.0.0 <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><> -> retrieved afl-persistent.1.4 (cached) -> retrieved alcotest.1.9.1 (cached) -> retrieved astring.0.8.5 (cached) -> retrieved backoff.0.1.1 (cached) -> retrieved bigstringaf.0.10.0 (cached) -> retrieved camlp-streams.5.0.1 (cached) -> installed conf-bash.1 -> retrieved cppo.1.8.0 (cached) -> retrieved cmdliner.2.0.0 (cached) -> retrieved crowbar.0.2.1 (cached) -> retrieved csexp.1.5.2 (cached) -> retrieved domain-local-await.1.0.1 (cached) -> retrieved domain-local-timeout.1.0.1 (cached) -> retrieved dscheck.0.5.0 (cached) -> retrieved cstruct.6.2.0 (cached) -> retrieved containers.3.16 (cached) -> retrieved either.1.0.0 (cached) -> retrieved fmt.0.11.0 (cached) -> retrieved hmap.0.8.1 (cached) -> retrieved iomux.0.4 (cached) -> retrieved kcas.0.7.0 (cached) -> retrieved logs.0.9.0 (cached) -> retrieved lwt-dllist.1.1.0 (cached) -> retrieved mtime.2.1.0 (cached) -> retrieved multicore-magic.2.3.1 (cached) -> retrieved mdx.2.5.1 (cached) -> retrieved ocaml-syntax-shims.1.0.0 (cached) -> retrieved ocaml-version.4.0.3 (cached) -> retrieved ocamlbuild.0.16.1 (cached) -> retrieved ocamlfind.1.9.8 (cached) -> retrieved ocplib-endian.1.2 (cached) -> retrieved optint.0.3.0 (cached) -> retrieved oseq.0.5.1 (cached) -> retrieved psq.0.2.1 (cached) -> retrieved re.1.14.0 (cached) -> retrieved seq.base (cached) -> installed seq.base -> retrieved result.1.5 (cached) -> retrieved stdlib-shims.0.3.0 (cached) -> retrieved thread-table.1.0.0 (cached) -> retrieved tsort.2.2.0 (cached) -> retrieved topkg.1.1.0 (cached) -> retrieved uutf.1.0.4 (cached) -> retrieved yojson.3.0.0 (cached) -> retrieved uring.2.7.0 (cached) -> retrieved dune.3.20.2, dune-configurator.3.20.2 (cached) -> installed cmdliner.2.0.0 -> installed ocamlbuild.0.16.1 -> installed ocamlfind.1.9.8 -> installed base-bytes.base -> installed topkg.1.1.0 -> installed hmap.0.8.1 -> installed uutf.1.0.4 -> installed mtime.2.1.0 -> installed fmt.0.11.0 -> installed astring.0.8.5 -> installed logs.0.9.0 -> installed dune.3.20.2 -> installed afl-persistent.1.4 -> installed lwt-dllist.1.1.0 -> installed csexp.1.5.2 -> installed backoff.0.1.1 -> installed camlp-streams.5.0.1 -> installed cstruct.6.2.0 -> installed either.1.0.0 -> installed multicore-magic.2.3.1 -> installed ocaml-syntax-shims.1.0.0 -> installed ocaml-version.4.0.3 -> installed cppo.1.8.0 -> installed optint.0.3.0 -> installed oseq.0.5.1 -> installed psq.0.2.1 -> installed result.1.5 -> installed stdlib-shims.0.3.0 -> installed thread-table.1.0.0 -> installed tsort.2.2.0 -> installed re.1.14.0 -> installed yojson.3.0.0 -> installed ocplib-endian.1.2 -> installed domain-local-timeout.1.0.1 -> installed domain-local-await.1.0.1 -> installed crowbar.0.2.1 -> installed kcas.0.7.0 -> installed alcotest.1.9.1 -> installed dune-configurator.3.20.2 -> installed bigstringaf.0.10.0 -> installed iomux.0.4 -> installed mdx.2.5.1 -> installed containers.3.16 -> installed uring.2.7.0 -> installed dscheck.0.5.0 Done. <><> afl-persistent.1.4 installed successfully ><><><><><><><><><><><><><><><><> => afl-persistent is installed, but since the current OCaml compiler does not enable AFL instrumentation by default, most packages will not be instrumented and fuzzing with afl-fuzz may not be effective. To globally enable AFL instrumentation, create an OCaml switch like: opam switch create 5.3.0+afl ocaml-variants.5.3.0+options ocaml-option-afl # To update the current shell environment, run: eval $(opam env) 2025-10-10 21:11.46 ---> saved as "5b116b64181552cad86f8509839bb8f908ece56ba692c88a544f17a23c93d166" /src: (copy (src .) (dst /src)) 2025-10-10 21:11.47 ---> saved as "c0da5e52fdc6f182d9667d822c0496bb892a8b1cad0a126aa1abc610cc582861" /src: (run (shell "opam exec -- dune build @install @check @runtest && rm -rf _build")) (cd _build/default/fuzz && ./fuzz_inherit_fds.exe) inherit_fds: PASS (cd _build/default/fuzz && ./fuzz_buf_write.exe) random ops: PASS (cd _build/default/fuzz && ./fuzz_buf_read.exe) random ops: PASS (cd _build/default/lib_eio_linux/tests && ./test.exe) Testing `eio_linux'. This run has ID `XE2U49TI'. [OK] io 0 copy. [OK] io 1 direct_copy. [OK] io 2 poll_add. [OK] io 3 poll_add_busy. [OK] io 4 iovec. [OK] io 5 no_sqe. [OK] io 6 read_exact. [OK] io 7 expose_backend. [OK] io 8 statx. [OK] io 9 signal_race. [OK] io 10 alloc-fixed-or-wait. Full test results in `/src/_build/default/lib_eio_linux/tests/_build/_tests/eio_linux'. Test Successful in 0.019s. 11 tests run. 2025-10-10 21:12.12 ---> saved as "05d6b9b3fe227bf699a7da44f34a65f2ee35e0cad78e6439a862014a6910a556" Job succeeded 2025-10-10 21:12.12: Job succeeded