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no error when method in metaclass is overridden by an incompatible method in its instance #17966

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DetachHead opened this issue Oct 16, 2024 · 0 comments
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bug mypy got something wrong

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@DetachHead
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class Foo(type):
    def foo(cls) -> None: ...


class Bar(Foo):
    def asdf(cls) -> None:
        cls.foo()


class Baz(metaclass=Bar):
    # no error.
    # at runtime it raises TypeError: Baz.foo() missing 2 required positional arguments: 'self' and 'asdf'
    def foo(self, asdf: int) -> None: ...


Baz.asdf()

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@DetachHead DetachHead added the bug mypy got something wrong label Oct 16, 2024
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