Segmentation fault and Bus error with subprocess

[yuygfgg]

import subprocess
from vapoursynth import core
core.std

subprocess.Popen(["ls"], stdin=subprocess.PIPE)

raises error:

zsh: segmentation fault  python

Or

zsh: bus error  python

Tried manually setting multiprocessing.set_start_method('spawn') and rebooted the machine but still got the error.

Is this behavior intended, or is it a bug?

[WolframRhodium]

Of course it is not intended.

[yuygfgg]

Upstream R70 is fine, and R57 used to be fine
(AmusementClub/vs-mlrt#107)

Tried rebuilding vapoursynth but still.

[WolframRhodium]

I don't have available apple devices so I cannot reproduce. Maybe you could try to find the erroneous commit using bisection.

[WolframRhodium]

Seems to be macOS's problem. I know some senior people experienced zsh fork failure (the same issue here) and "a pretty big memory leak somewhere".