[issue40521] [subinterpreters] Make free lists and unicode caches per-interpreter

[junyixie]

junyixie <xie.junyi at outlook.com> added the comment:

https://github.com/python/cpython/pull/24821/commits/9d7681dbd273b5025fd9b19d1be0a1f978a0b12e

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40521>
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