[issue41194] SIGSEGV in Python 3.9.0b3 in Python-ast.c:1412

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

I can reproduce the crash using the following script.py:
---
import gc; gc.set_threshold(5)
import sys

old_modules = dict(sys.modules)
sys.modules.clear()
sys.modules.update(old_modules)

import _ast
import gc
gc.collect()
---

And the command:
---
./python -i < script.py
---

PyInit__ast() is called twice. That's surprising: builtin extension modules should only be initialized once.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41194>
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