[issue31499] ElementTree crash while cleaning up ParseError

[STINNER Victor]

STINNER Victor added the comment:

Attached PR 3641 fixes bug1.py and bug2.py crashes.

Sadly, I failed to write a reliable unit test using bug2.py. The bug requires to trigger the garbage collector in a specific order which depends on how frames are tracked by the GC...

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versions: +Python 3.6

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31499>
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