2026-03-23 09:27.07: New job: test ocaml-multicore/lwt_eio https://github.com/ocaml-multicore/lwt_eio.git#refs/heads/master (e3679c5296dd0aacac825735dab45ded26d55821) (openbsd-amd64:openbsd-77-amd64-5.4_opam-2.5)Base: openbsd-77-amd64-ocaml-5.4Opam project buildTo reproduce locally:git clone --recursive "https://github.com/ocaml-multicore/lwt_eio.git" -b "master" && cd "lwt_eio" && git reset --hard e3679c52cat > Dockerfile <<'END-OF-DOCKERFILE'FROM openbsd-77-amd64-ocaml-5.4# openbsd-77-amd64-5.4_opam-2.5USER 1000:1000ENV CLICOLOR_FORCE="1"ENV OPAMCOLOR="always"RUN doas ln -f /usr/bin/opam-2.5 /usr/bin/opamRUN opam init --reinit -niRUN uname -rs && opam exec -- ocaml -version && opam --versionRUN cd ~/opam-repository && (git cat-file -e b479391466e5245dda12ec6a6de5f4b13b6d603f || git fetch origin master) && git reset -q --hard b479391466e5245dda12ec6a6de5f4b13b6d603f && git log --no-decorate -n1 --oneline && opam update -uCOPY --chown=1000:1000 lwt_eio.opam /home/opam/src/./RUN opam pin add -yn lwt_eio.dev '/home/opam/src/./'RUN echo '(lang dune 3.0)' > '/home/opam/src/./dune-project'ENV DEPS="astring.0.8.5 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.2.1.0 cppo.1.8.0 csexp.1.5.2 cstruct.6.2.0 domain-local-await.1.0.1 dune.3.22.0 dune-configurator.3.22.0 eio.1.3 eio_main.1.3 eio_posix.1.3 fmt.0.11.0 hmap.0.8.1 iomux.0.4 logs.0.10.0 lwt.6.1.1 lwt-dllist.1.1.0 mdx.2.5.1 mtime.2.1.0 ocaml.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-version.4.0.4 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 optint.0.3.0 psq.0.2.1 re.1.14.0 result.1.5 seq.base thread-table.1.0.0 topkg.1.1.1"ENV CI="true"ENV OCAMLCI="true"RUN opam update --depexts && opam install --cli=2.5 --depext-only -y lwt_eio.dev $DEPSRUN opam install $DEPSCOPY --chown=1000:1000 . /home/opam/srcRUN cd /home/opam/src && opam exec -- dune build @install @check @runtest && rm -rf _buildEND-OF-DOCKERFILEdocker build .END-REPRO-BLOCK2026-03-23 09:27.07: Using cache hint "ocaml-multicore/lwt_eio-openbsd-77-amd64-ocaml-5.4-openbsd-77-amd64-5.4_opam-2.5-b150a4496ad1c90bac8fb439067e6896"2026-03-23 09:27.07: Using OBuilder spec:((from openbsd-77-amd64-ocaml-5.4)(comment openbsd-77-amd64-5.4_opam-2.5)(user (uid 1000) (gid 1000))(env CLICOLOR_FORCE 1)(env OPAMCOLOR always)(run (shell "doas 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"))(run (cache (opam-archives (target /home/opam/.opam/download-cache)))(network host)(shell "cd ~/opam-repository && (git cat-file -e b479391466e5245dda12ec6a6de5f4b13b6d603f || git fetch origin master) && git reset -q --hard b479391466e5245dda12ec6a6de5f4b13b6d603f && git log --no-decorate -n1 --oneline && opam update -u"))(copy (src lwt_eio.opam) (dst /home/opam/src/./))(run (network host)(shell "opam pin add -yn lwt_eio.dev '/home/opam/src/./'"))(run (shell "echo '(lang dune 3.0)' > '/home/opam/src/./dune-project'"))(env DEPS "astring.0.8.5 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.2.1.0 cppo.1.8.0 csexp.1.5.2 cstruct.6.2.0 domain-local-await.1.0.1 dune.3.22.0 dune-configurator.3.22.0 eio.1.3 eio_main.1.3 eio_posix.1.3 fmt.0.11.0 hmap.0.8.1 iomux.0.4 logs.0.10.0 lwt.6.1.1 lwt-dllist.1.1.0 mdx.2.5.1 mtime.2.1.0 ocaml.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-version.4.0.4 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 optint.0.3.0 psq.0.2.1 re.1.14.0 result.1.5 seq.base thread-table.1.0.0 topkg.1.1.1")(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 lwt_eio.dev $DEPS"))(run (cache (opam-archives (target /home/opam/.opam/download-cache)))(network host)(shell "opam install $DEPS"))(copy (src .) (dst /home/opam/src))(run (shell "cd /home/opam/src && opam exec -- dune build @install @check @runtest && rm -rf _build")))2026-03-23 09:27.07: Waiting for resource in pool OCluster2026-03-23 09:27.07: Waiting for worker…2026-03-23 11:14.35: Got resource from pool OClusterBuilding on oreganoAll commits already cachedHEAD is now at e3679c5 Merge pull request #30 from talex5/examples(from openbsd-77-amd64-ocaml-5.4)2026-03-23 11:14.35 ---> using "8424522d1f78b81b26ba463ba357c8ca122e0f74070b621aa84fc80c68430631" from cache/: (comment openbsd-77-amd64-5.4_opam-2.5)/: (user (uid 1000) (gid 1000))/: (env CLICOLOR_FORCE 1)/: (env OPAMCOLOR always)/: (run (shell "doas ln -f /usr/bin/opam-2.5 /usr/bin/opam"))2026-03-23 11:14.35 ---> using "cd72dc3a3c8ea2afd18b1257d8b5421d0f9a4dafb0a258b995fdf62c1e2a67c4" from cache/: (run (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.<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>[default] no changes from file:///home/opam/opam-repository2026-03-23 11:14.35 ---> using "25ee98d58d8c907869f6fd5004c258d71c5033e73edf1fe48b86a48a34773b77" from cache/: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))OpenBSD 7.7The OCaml toplevel, version 5.4.02.5.02026-03-23 11:14.35 ---> using "b97072ad387d97fa49b3fc7ece6dbbedda3ad8df05946df9b57bbb8c1e1ea296" from cache/: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))(network host)(shell "cd ~/opam-repository && (git cat-file -e b479391466e5245dda12ec6a6de5f4b13b6d603f || git fetch origin master) && git reset -q --hard b479391466e5245dda12ec6a6de5f4b13b6d603f && git log --no-decorate -n1 --oneline && opam update -u"))From https://github.com/ocaml/opam-repository* branch master -> FETCH_HEAD93a7bce43a..58acbffc6f master -> origin/masterb479391466 Merge pull request #29567 from mtelvers/opam-publish-ocaml-version.4.0.4<><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><>[default] synchronised from file:///home/opam/opam-repositoryEverything 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.5.5.0"), which will ask permission to downgrade or uninstall the conflicting packages.Nothing to do.# To update the current shell environment, run: eval $(opam env)2026-03-23 11:14.35 ---> using "a2fd99aac02a88d5dd532222a4cf79a2255879267ee84bc641e84c90964b5c5e" from cache/: (copy (src lwt_eio.opam) (dst /home/opam/src/./))2026-03-23 11:15.32 ---> saved as "203088507e72a0350d72bceb4213be5e67b2c209834bb018048524574cc16a82"/: (run (network host)(shell "opam pin add -yn lwt_eio.dev '/home/opam/src/./'"))[lwt_eio.dev] synchronised (file:///home/opam/src)lwt_eio is now pinned to file:///home/opam/src (version dev)2026-03-23 11:16.27 ---> saved as "8b1811d06020b7250e6b757f0d5724c25d492f9a19803615db28e27115002027"/: (run (shell "echo '(lang dune 3.0)' > '/home/opam/src/./dune-project'"))2026-03-23 11:17.24 ---> saved as "736f1b29beb2dcebfc12b52070cc635e6915ad41ff1dd84a0511c786bb142cf4"/: (env DEPS "astring.0.8.5 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.2.1.0 cppo.1.8.0 csexp.1.5.2 cstruct.6.2.0 domain-local-await.1.0.1 dune.3.22.0 dune-configurator.3.22.0 eio.1.3 eio_main.1.3 eio_posix.1.3 fmt.0.11.0 hmap.0.8.1 iomux.0.4 logs.0.10.0 lwt.6.1.1 lwt-dllist.1.1.0 mdx.2.5.1 mtime.2.1.0 ocaml.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-version.4.0.4 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 optint.0.3.0 psq.0.2.1 re.1.14.0 result.1.5 seq.base thread-table.1.0.0 topkg.1.1.1")/: (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 lwt_eio.dev $DEPS"))[WARNING] Unknown update command for bsd, skipping system update<><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><>[lwt_eio.dev] synchronised (file:///home/opam/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)2026-03-23 11:18.29 ---> saved as "909b4b8f9787c3e6481c8125b897d883cf6590d3e1e4ee43ffa7b899cc9f077e"/: (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 33 packages- install astring 0.8.5- install base-bytes base- install bigstringaf 0.10.0- install camlp-streams 5.0.1- install cmdliner 2.1.0- install cppo 1.8.0- install csexp 1.5.2- install cstruct 6.2.0- install domain-local-await 1.0.1- install dune 3.22.0- install dune-configurator 3.22.0- install eio 1.3- install eio_main 1.3- install eio_posix 1.3- install fmt 0.11.0- install hmap 0.8.1- install iomux 0.4- install logs 0.10.0- install lwt 6.1.1- install lwt-dllist 1.1.0- install mdx 2.5.1- install mtime 2.1.0- install ocaml-version 4.0.4- install ocamlbuild 0.16.1- install ocamlfind 1.9.8- install ocplib-endian 1.2- install optint 0.3.0- install psq 0.2.1- install re 1.14.0- install result 1.5- install seq base- install thread-table 1.0.0- install topkg 1.1.1<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>-> retrieved camlp-streams.5.0.1 (cached)-> retrieved bigstringaf.0.10.0 (cached)-> retrieved astring.0.8.5 (cached)-> retrieved cmdliner.2.1.0 (cached)-> retrieved csexp.1.5.2 (cached)-> retrieved cppo.1.8.0 (cached)-> retrieved domain-local-await.1.0.1 (cached)-> retrieved cstruct.6.2.0 (cached)-> retrieved fmt.0.11.0 (cached)-> retrieved hmap.0.8.1 (cached)-> retrieved eio.1.3, eio_main.1.3, eio_posix.1.3 (cached)-> retrieved iomux.0.4 (cached)-> retrieved logs.0.10.0 (cached)-> retrieved lwt-dllist.1.1.0 (cached)-> retrieved lwt.6.1.1 (cached)-> retrieved mdx.2.5.1 (cached)-> retrieved mtime.2.1.0 (cached)-> retrieved ocaml-version.4.0.4 (cached)-> retrieved ocamlfind.1.9.8 (cached)-> retrieved ocplib-endian.1.2 (cached)-> retrieved ocamlbuild.0.16.1 (cached)-> retrieved psq.0.2.1 (cached)-> retrieved optint.0.3.0 (cached)-> retrieved dune.3.22.0, dune-configurator.3.22.0 (cached)-> retrieved seq.base (cached)-> retrieved result.1.5 (cached)-> retrieved thread-table.1.0.0 (cached)-> retrieved re.1.14.0 (cached)-> retrieved topkg.1.1.1 (cached)-> installed cmdliner.2.1.0-> installed ocamlfind.1.9.8-> installed base-bytes.base-> installed seq.base-> installed ocamlbuild.0.16.1-> installed topkg.1.1.1-> installed fmt.0.11.0-> installed astring.0.8.5-> installed hmap.0.8.1-> installed mtime.2.1.0-> installed dune.3.22.0-> installed csexp.1.5.2-> installed camlp-streams.5.0.1-> installed cstruct.6.2.0-> installed cppo.1.8.0-> installed lwt-dllist.1.1.0-> installed ocaml-version.4.0.4-> installed ocplib-endian.1.2-> installed optint.0.3.0-> installed psq.0.2.1-> installed result.1.5-> installed dune-configurator.3.22.0-> installed thread-table.1.0.0-> installed bigstringaf.0.10.0-> installed domain-local-await.1.0.1-> installed iomux.0.4-> installed re.1.14.0-> installed eio.1.3-> installed lwt.6.1.1-> installed eio_posix.1.3-> installed eio_main.1.3-> installed logs.0.10.0-> installed mdx.2.5.1Done.# To update the current shell environment, run: eval $(opam env)2026-03-23 11:24.17 ---> saved as "9d167249c0eb351f200f4b35a7b9facac0148746333ffcd2006274262cafb602"/: (copy (src .) (dst /home/opam/src))2026-03-23 11:25.15 ---> saved as "4d923ddb34aa807d0eef5bceaf705e85b3db20ab572ed466522bf0d53a11db3a"/: (run (shell "cd /home/opam/src && opam exec -- dune build @install @check @runtest && rm -rf _build"))(cd _build/default && /home/opam/.opam/5.4.0/bin/ocamlopt.opt -w @1..3@5..28@30..39@43@46..47@49..57@61..62@67@69-40 -strict-sequence -strict-formats -short-paths -keep-locs -g -I lib/.lwt_eio.objs/byte -I lib/.lwt_eio.objs/native -I /home/opam/.opam/5.4.0/lib/bigstringaf -I /home/opam/.opam/5.4.0/lib/bytes -I /home/opam/.opam/5.4.0/lib/cstruct -I /home/opam/.opam/5.4.0/lib/domain-local-await -I /home/opam/.opam/5.4.0/lib/eio -I /home/opam/.opam/5.4.0/lib/eio/core -I /home/opam/.opam/5.4.0/lib/eio/runtime_events -I /home/opam/.opam/5.4.0/lib/eio/unix -I /home/opam/.opam/5.4.0/lib/eio/utils -I /home/opam/.opam/5.4.0/lib/fmt -I /home/opam/.opam/5.4.0/lib/hmap -I /home/opam/.opam/5.4.0/lib/lwt -I /home/opam/.opam/5.4.0/lib/lwt-dllist -I /home/opam/.opam/5.4.0/lib/lwt/unix -I /home/opam/.opam/5.4.0/lib/mtime -I /home/opam/.opam/5.4.0/lib/mtime/clock -I /home/opam/.opam/5.4.0/lib/ocaml/runtime_events -I /home/opam/.opam/5.4.0/lib/ocaml/threads -I /home/opam/.opam/5.4.0/lib/ocaml/unix -I /home/opam/.opam/5.4.0/lib/ocplib-endian -I /home/opam/.opam/5.4.0/lib/ocplib-endian/bigstring -I /home/opam/.opam/5.4.0/lib/optint -I /home/opam/.opam/5.4.0/lib/psq -I /home/opam/.opam/5.4.0/lib/seq -I /home/opam/.opam/5.4.0/lib/thread-table -cmi-file lib/.lwt_eio.objs/byte/lwt_eio.cmi -no-alias-deps -opaque -o lib/.lwt_eio.objs/native/lwt_eio.cmx -c -impl lib/lwt_eio.ml)File "lib/lwt_eio.ml", lines 126-174, characters 29-3:126 | .............................object127 | inherit Lwt_engine.abstract128 |129 | method private cleanup =130 | try Switch.fail sw Exit...171 |172 | method! fork =173 | is_forked := true174 | endError: This object has virtual methods.The following methods are virtual : id(cd _build/default && /home/opam/.opam/5.4.0/bin/ocamlc.opt -w @1..3@5..28@30..39@43@46..47@49..57@61..62@67@69-40 -strict-sequence -strict-formats -short-paths -keep-locs -g -bin-annot -bin-annot-occurrences -I lib/.lwt_eio.objs/byte -I /home/opam/.opam/5.4.0/lib/bigstringaf -I /home/opam/.opam/5.4.0/lib/bytes -I /home/opam/.opam/5.4.0/lib/cstruct -I /home/opam/.opam/5.4.0/lib/domain-local-await -I /home/opam/.opam/5.4.0/lib/eio -I /home/opam/.opam/5.4.0/lib/eio/core -I /home/opam/.opam/5.4.0/lib/eio/runtime_events -I /home/opam/.opam/5.4.0/lib/eio/unix -I /home/opam/.opam/5.4.0/lib/eio/utils -I /home/opam/.opam/5.4.0/lib/fmt -I /home/opam/.opam/5.4.0/lib/hmap -I /home/opam/.opam/5.4.0/lib/lwt -I /home/opam/.opam/5.4.0/lib/lwt-dllist -I /home/opam/.opam/5.4.0/lib/lwt/unix -I /home/opam/.opam/5.4.0/lib/mtime -I /home/opam/.opam/5.4.0/lib/mtime/clock -I /home/opam/.opam/5.4.0/lib/ocaml/runtime_events -I /home/opam/.opam/5.4.0/lib/ocaml/threads -I /home/opam/.opam/5.4.0/lib/ocaml/unix -I /home/opam/.opam/5.4.0/lib/ocplib-endian -I /home/opam/.opam/5.4.0/lib/ocplib-endian/bigstring -I /home/opam/.opam/5.4.0/lib/optint -I /home/opam/.opam/5.4.0/lib/psq -I /home/opam/.opam/5.4.0/lib/seq -I /home/opam/.opam/5.4.0/lib/thread-table -cmi-file lib/.lwt_eio.objs/byte/lwt_eio.cmi -no-alias-deps -opaque -o lib/.lwt_eio.objs/byte/lwt_eio.cmo -c -impl lib/lwt_eio.ml)File "lib/lwt_eio.ml", lines 126-174, characters 29-3:126 | .............................object127 | inherit Lwt_engine.abstract128 |129 | method private cleanup =130 | try Switch.fail sw Exit...171 |172 | method! fork =173 | is_forked := true174 | endError: This object has virtual methods.The following methods are virtual : id"cd /home/opam/src && opam exec -- dune build @install @check @runtest && rm -rf _build" failed with exit status 12026-03-23 11:26.21: Job failed: Failed: Build failed