MacOSX CI sometimes gets KILL'ed during ppx_lib install

[jmid]

Also from #88:

• one MacOSX got killed during ppx_lib install after only 10min https://github.com/jmid/multicoretests/actions/runs/3444725851/jobs/5747632328#step:6:527

Originally posted by @jmid in #88 (comment)

We have observed this previously in #157 and #162
CC: @shym

[shym]

Should be fixed since #198.

[jmid]

Dang, reopening as this just happened again
https://github.com/jmid/multicoretests/actions/runs/3538600388/jobs/5939594832

Processing 46/57: [ppxlib: dune build]
+ /Users/runner/.opam/opam-init/hooks/sandbox.sh "build" "dune" "build" "-p" "ppxlib" "-j" "1" "@install" (CWD=/Users/runner/work/multicoretests/multicoretests/_opam/.opam-switch/build/ppxlib.0.28.0)
- File "ast/dune", line 16, characters 5-58:
- 16 |      (run %{exe:pp/pp.exe} %{ocaml_version} %{input-file}))
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- (cd _build/default && ast/pp/pp.exe 5.0.0+dev8-2022-10-12 ast/versions.ml) > _build/default/ast/versions.pp.ml
- Command got signal KILL.
[ERROR] The compilation of ppxlib.0.28.0 failed at "dune build -p ppxlib -j 1 @install".
Processing 47/57: [domainslib: dune build]
Processing 48/57: [domainslib: dune build]
+ /Users/runner/.opam/opam-init/hooks/sandbox.sh "build" "dune" "build" "-p" "domainslib" "-j" "1" (CWD=/Users/runner/work/multicoretests/multicoretests/_opam/.opam-switch/build/domainslib.0.5.0)
λ compiled  domainslib.0.5.0
Processing 50/57: [qcheck-ounit: dune build]
∗ installed domainslib.0.5.0
Processing 51/57: [qcheck-ounit: dune build]
Processing 52/57: [qcheck-ounit: dune build]
+ /Users/runner/.opam/opam-init/hooks/sandbox.sh "build" "dune" "build" "-p" "qcheck-ounit" "-j" "1" (CWD=/Users/runner/work/multicoretests/multicoretests/_opam/.opam-switch/build/qcheck-ounit.0.20)
λ compiled  qcheck-ounit.0.20
∗ installed qcheck-ounit.0.20
Processing 54/57: [qcheck: dune build]
+ /Users/runner/.opam/opam-init/hooks/sandbox.sh "build" "dune" "build" "-p" "qcheck" "-j" "1" (CWD=/Users/runner/work/multicoretests/multicoretests/_opam/.opam-switch/build/qcheck.0.20)
λ compiled  qcheck.0.20
∗ installed qcheck.0.20

#=== ERROR while compiling ppxlib.0.28.0 ======================================#
# context     2.1.3 | macos/x86_64 | ocaml-variants.5.0.0+trunk | git+https://github.com/ocaml/opam-repository.git
# path        ~/work/multicoretests/multicoretests/_opam/.opam-switch/build/ppxlib.0.28.0
# command     ~/.opam/opam-init/hooks/sandbox.sh build dune build -p ppxlib -j 1 @install
# exit-code   1
# env-file    ~/.opam/log/ppxlib-52187-22a8ae.env
# output-file ~/.opam/log/ppxlib-52187-22a8ae.out
### output ###
# File "ast/dune", line 16, characters 5-58:
# 16 |      (run %{exe:pp/pp.exe} %{ocaml_version} %{input-file}))
#           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
# (cd _build/default && ast/pp/pp.exe 5.0.0+dev8-2022-10-12 ast/versions.ml) > _build/default/ast/versions.pp.ml
# Command got signal KILL.

[jmid]

We just hit this again on macOS 5.1.0+trunk
https://github.com/ocaml-multicore/multicoretests/actions/runs/3751523987/jobs/6372603387

#=== ERROR while compiling ppxlib.0.28.0 ======================================#
# context     2.1.4 | macos/x86_64 | ocaml-variants.5.1.0+trunk | pinned(git+https://github.com/shym/ppxlib.git#5.1#96e453d0)
# path        ~/work/multicoretests/multicoretests/_opam/.opam-switch/build/ppxlib.0.28.0
# command     ~/.opam/opam-init/hooks/sandbox.sh build dune build -p ppxlib -j 3 @install
# exit-code   1
# env-file    ~/.opam/log/ppxlib-53889-4d8d39.env
# output-file ~/.opam/log/ppxlib-53889-4d8d39.out
### output ###
# File "src/dune", line 33, characters 0-143:
# 33 | (rule
# 34 |  (targets ast_builder_generated.ml)
# 35 |  (deps gen/gen_ast_builder.exe)
# 36 |  (action
# 37 |   (run ./gen/gen_ast_builder.exe %{lib:ppxlib.ast:ast.ml})))
# (cd _build/default/src && gen/gen_ast_builder.exe ../../install/default/lib/ppxlib/ast/ast.ml)
# Command got signal KILL.



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫 
┌─ The following actions failed
│ λ build ppxlib 0.28.0
└─ 
┌─ The following changes have been performed
│ ∗ install ocaml-compiler-libs v0.12.4
│ ∗ install ppx_derivers        1.2.1
│ ∗ install sexplib0            v0.15.1
│ ∗ install stdlib-shims        0.3.0
└─ 
[NOTE] Pinning command successful, but your installed packages may be out of sync.
# Run eval $(opam env) to update the current shell environment

The former state can be restored with:
    /Users/runner/hostedtoolcache/opam/2.1.4/x86_64/opam switch import "/Users/runner/work/multicoretests/multicoretests/_opam/.opam-switch/backup/state-20221221174953.export"
'opam pin add ppxlib git+https://github.com/shym/ppxlib.git#5.1' failed.
Error: Process completed with exit code 31.
0s

[shym]

As it seems it appears a lot less when dropping parallelism during dependency builds, #278 enforces also OPAMJOBS to 1 during that build of ppxlib.

[jmid]

Closing again as I don't recall having seen this in the past month