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Fix crash on redefined class variable annotated with `Final[<type>]` by AlexWaygood · Pull Request #12951 · python/mypy · GitHub
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Fix crash on redefined class variable annotated with Final[<type>] #12951

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Merged
merged 1 commit into from
Jun 7, 2022
Merged

Fix crash on redefined class variable annotated with Final[<type>] #12951

merged 1 commit into from
Jun 7, 2022

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AlexWaygood
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@AlexWaygood AlexWaygood commented Jun 7, 2022 •
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Description

Fixes #12950.

Mypy currently crashes on this snippet of code:

from typing import Final

class MyClass:
    a: None
    a: Final[int] = 1

This PR fixes that.

Test Plan

I added a test.

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github-actions bot commented Jun 7, 2022

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

@JelleZijlstra JelleZijlstra merged commit c3e32e3 into python:master Jun 7, 2022
@AlexWaygood AlexWaygood deleted the final branch June 7, 2022 17:24
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Successfully merging this pull request may close these issues.

mypy fails when redefining class variable with Final[Type] type annotation

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@AlexWaygood @JelleZijlstra