[New-bugs-announce] [issue35219] macOS 10.14 High Sierra crashes in multiprocessing

[Barry A. Warsaw]

New submission from Barry A. Warsaw <barry at python.org>:

As we're beginning to roll out macOS 10.14 High Sierra, we're seeing an increase in core files inside /cores.  This can consume a ton of disk space if you have coredumps enabled.  I don't have a short reproducer yet, but we believe this is related to changes in macOS behavior around fork().  Here are some clues:

https://github.com/ansible/ansible/issues/32499#issuecomment-341578864

https://stackoverflow.com/questions/50168647/multiprocessing-causes-python-to-crash-and-gives-an-error-may-have-been-in-progr/52230415#52230415

http://sealiesoftware.com/blog/archive/2017/6/5/Objective-C_and_fork_in_macOS_1013.html

----------
messages: 329747
nosy: barry
priority: normal
severity: normal
status: open
title: macOS 10.14 High Sierra crashes in multiprocessing
versions: Python 3.6, Python 3.7, Python 3.8

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<https://bugs.python.org/issue35219>
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