path: root/Misc/NEWS.d/next/Library/2023-09-09-15-08-37.gh-issue-50644.JUAZOh.rst

Attempts to pickle or create a shallow or deep copy of :mod:`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.