[issue43897] Implement support for validation of pattern matching ASTs

[Brandt Bucher]

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


New changeset 8d0647485db5af2a0f0929d6509479ca45f1281b by Brandt Bucher in branch 'main':
bpo-43897: Reject "_" captures and top-level MatchStar in the AST validator (GH-27432)
https://github.com/python/cpython/commit/8d0647485db5af2a0f0929d6509479ca45f1281b


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