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gh-132413: Clear weakref to _datetime after modules are finalized #136152

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@neonene neonene commented Jun 30, 2025

The _datetime module has a weakref to the module itself, which is expected to be connected all its life. However, finalize_remove_modules() in pylifecycle.c shares the same weakref, then the GC clears it before finishing the module.

The module should be cleared first, bypassing the GC once.

@neonene neonene marked this pull request as ready for review July 1, 2025 20:00
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