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Fix crash during ParamSpec inference #14118

Merged
merged 2 commits into from
Nov 17, 2022
Merged

Fix crash during ParamSpec inference #14118

merged 2 commits into from
Nov 17, 2022

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ilevkivskyi
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Fixes #13903

The fix is straightforward, the formal to actual map needs to be refreshed twice, after both using external and internal type context.

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According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

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It looks like @jhance just fixed this in 885e361. But I am still going to land the tests, so that it will not regress in future.

@ilevkivskyi ilevkivskyi merged commit 823667d into python:master Nov 17, 2022
@ilevkivskyi ilevkivskyi deleted the fix-paramspec-crash branch November 17, 2022 21:11
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@JukkaL JukkaL Awaiting requested review from JukkaL

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[INTERNAL ERROR] IndexError: list index out of range
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