Disallow `type[NoReturn]`
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bug
priority-2-low
topic-pep-484
- Dominant language
- Python
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Description
from typing import NoReturn
# Incompatible types in assignment (expression has type "object", variable has type "Type[NoReturn]") [assignment]
foo: type[NoReturn] = NoReturn
https://mypy-play.net/?mypy=latest&python=3.10&gist=ae2c337cc5fdfe2a3022aaae54903012
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Research direction
Reproduce the shown assignment using the linked mypy-play example and confirm the current diagnostic. Locate the type-checking path that accepts type[NoReturn], add coverage for this case, and verify that mypy rejects it without changing valid NoReturn behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100