[issue46615] Use-after-free by mutating set during set operations

[Dennis Sweeney]

Dennis Sweeney <sweeney.dennis650 at gmail.com> added the comment:

It does look like there are some pickle situations that crash. Attached is a randomized crasher. I haven't done too much careful reasoning about it, but adding INCREFs everywhere seems to fix most of the issues.

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Added file: https://bugs.python.org/file50631/picklecrasher.py

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