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[3.12] gh-50644: Forbid pickling of codecs streams (GH-109180) (#109231)

gh-50644: Forbid pickling of codecs streams (GH-109180)

Attempts to pickle or create a shallow or deep copy of codecs streams
now raise a TypeError.

Previously, copying failed with a RecursionError, while pickling
produced wrong results that eventually caused unpickling to fail with
a RecursionError.
(cherry picked from commit d6892c2b9263b39ea1c7905667942914b6a24b2c)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
M
Miss Islington (bot) committed
3e1c9e8264ad9acfef60b3aa9b3aa59bee5becca
Parent: be8255a
Committed by GitHub <noreply@github.com> on 10/2/2023, 2:55:52 PM