[issue28649] refleak in typing.py

[Ivan Levkivskyi]

Ivan Levkivskyi added the comment:

OK, here are the PRs:

https://github.com/python/typing/pull/327
https://github.com/python/typing/pull/328

Those two seem to fix everything, I tried various cache sizes with both C and Python versions of lru_cache and found no refleaks.

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