False positive: `invalid-syntax` alternative patterns bind different names

[BarrensZeppelin]

Summary

This file produces an invalid-syntax error, but it contains valid syntax:

import ast

match None:
    case ast.Subscript(n, ast.Constant() | ast.Slice()) | ast.Attribute(n):
        pass

https://play.ruff.rs/a88bae2d-d65a-4495-a33d-384a09fbbb4f

If I remove | ast.Slice(), the error goes away, so it seems like state is incorrectly shared between different alternative patterns.

Version

ruff 0.14.4

[MichaReiser]

Thanks. I hoped that this were fixed by #21104 but there still seems to be a bug with this check.