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"Type variable is invalid as target for type alias" error on new union syntax when not using TypeAlias type #14824

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DetachHead opened this issue Mar 3, 2023 · 1 comment
Open

"Type variable is invalid as target for type alias" error on new union syntax when not using TypeAlias type #14824

DetachHead opened this issue Mar 3, 2023 · 1 comment
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bug mypy got something wrong

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@DetachHead
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from typing import TypeVar, TypeAlias

T = TypeVar("T")

MaybeList = T | list[T] # error: Type variable "__main__.T" is invalid as target for type alias
MaybeList2: TypeAlias = T | list[T] # no error

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@DetachHead DetachHead added the bug mypy got something wrong label Mar 3, 2023
@KotlinIsland
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related to: #13376

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@DetachHead @KotlinIsland