[3.11] gh-93820: Fix copy() regression in enum.Flag (GH-93876) #93886
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GH-26658 introduced a regression in copy / pickle protocol for combined
enum.Flag
s.copy.copy(re.A | re.I)
would fail withAttributeError: ASCII|IGNORECASE
.enum.Flag
now has a__reduce_ex__()
method that reduces flags bycombined value, not by combined name.
(cherry picked from commit 05b32c1)
Co-authored-by: Christian Heimes [email protected]