Fix crashes on variadic unpacking in synthetic types#21555
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ilevkivskyi wants to merge 1 commit into
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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cc @JukkaL who added original TODO/FIX comments. |
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Fixes #21237 (and similar crashes).
The problem is that we cannot do some of the type argument normalization early in
typeanal.py(since that will cause crashes on some pathological recursive aliases), so we do it insemanal_typeargs.pylater. However, the mixed traverser visitor is somewhat incomplete (most notably w.r.t. generated methods). I add (most of) the missing parts.