Unsupported type Type

[mitar]

For the following program:

import typing

T = typing.TypeVar('T')
L = typing.TypeVar('L', bound='List')

class List(typing.List[T]):
    def __init__(self, iterable: typing.Iterable = ()) -> None:
        super().__init__(iterable)

    def copy(self: L) -> L:
        return type(self)(self)

I get the following error:

test.py: error: Unsupported type Type["L"]

mypy 0.560

I do not see why it here an error?

[ilevkivskyi]

This is essentially a duplicate of #4300 modulo Tuple -> List. Could you please copy your repro there, and close this one?

[mitar]

Copied. I am not sure if it is the same though.