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

[STINNER Victor]

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

> if we don't load _warnings module as soon as possible, what possible risks will be raise?

There are different risks:

* Worst case: using the _warnings module state before it's initialized may lead to crash.
* Best case: some warnings are not emitted.

Anyway, the initial issue should now be fixed by my commit.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39796>
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