Spurious error about _ignore_ in subclass of enum

[kstauffer]

mypy has a false positive here:

from enum import Enum
class E(Enum):
    _ignore_ = ""  # mypy error: Cannot override writable attribute "_ignore_" with a final one  [misc]

Is this actually a typeshed problem? enum.pyi has _ignore_: str | list[str]. Should that be Final? Or, would that be papering over the problem since _ignore_ doesn't actually exist after the metaclass processes the class body?

Your Environment

WSL Ubuntu 20.04
python 3.8.10
mypy 0.931

No flags or config file.

Workaround (type:ignore[misc]) is easy enough for now.

[kstauffer]

Fixed by PR #12128.