[issue41194] Python 3.9.0b3 crash on compile() in PyAST_Check() when the _ast module is loaded more than once

[STINNER Victor]

Change by STINNER Victor <vstinner at python.org>:


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pull_requests: +20441
pull_request: https://github.com/python/cpython/pull/21292

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