[issue42245] concurrent.futures.ProcessPoolExecutor freezes depending on complexity

[Ken Jin]

Ken Jin <kenjin4096 at gmail.com> added the comment:

Danil, thanks for finding the cause behind this. Could you check if the new behavior in Python 3.8 and higher has the same problem on your machine (without your fix)? multiprocessing on MacOS started using spawn in 3.8, and I was wondering if it that fixed it.

What's new entry for 3.8 : 
https://docs.python.org/3/whatsnew/3.8.html#multiprocessing

The bug tracked:
https://bugs.python.org/issue33725

The PR for that
https://github.com/python/cpython/pull/13603/files

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