Fix crash on invalid unpack in base class #19962
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
JukkaL
approved these changes
Oct 1, 2025
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Fixes #19960
Fix is trivial, we can't use the "assertion" before type checking phase. I also fix missing line/column for union types. I am surprised this didn't cause problems before.
cc @JukkaL