[issue39796] warning extension module inited twice in python3.9

[STINNER Victor]

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


New changeset 66b7973c1b2e6aa6a2462c6b13971a08cd665af2 by Victor Stinner in branch 'master':
bpo-39796: Fix _warnings module initialization (GH-18739)
https://github.com/python/cpython/commit/66b7973c1b2e6aa6a2462c6b13971a08cd665af2


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<https://bugs.python.org/issue39796>
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