[issue44589] Pattern Matching - duplicate keys in mapping patterns

[Brandt Bucher]

Brandt Bucher <brandtbucher at gmail.com> added the comment:


New changeset 2693132292b2acf381ac6fa729bf3acf41d9d72b by Jack DeVries in branch 'main':
bpo-44589: raise a SyntaxError when mapping patterns have duplicate literal keys (GH-27131)
https://github.com/python/cpython/commit/2693132292b2acf381ac6fa729bf3acf41d9d72b


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