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Fix a crash when function-scope recursive alias appears as upper bound #15159

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ilevkivskyi
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Fixes #15018

The fix is quite straightforward: function-scope aliases are not supported anyway, so we just give up early and let the error appear.

@ilevkivskyi ilevkivskyi requested a review from JukkaL April 30, 2023 20:46
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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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@hauntsaninja hauntsaninja left a comment

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Looks great, thanks!

@hauntsaninja hauntsaninja merged commit 3097169 into python:master May 1, 2023
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@ilevkivskyi ilevkivskyi deleted the fix-recursive-bound-func-crash branch May 1, 2023 14:05
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Internal Error with recursive TypeAlias + TypeVar when in function scope
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