Signature incompatible with supertype when using overload since updating from 1.1.1 to 1.2.0 #15041

#!/usr/bin/env python3

import typing
if typing.TYPE_CHECKING:
	from typing_extensions import Self

T_co = typing.TypeVar('T_co', covariant=True)


class Config(typing.Generic[T_co]):

	def __init__(self, value: T_co) -> None:
		self.value = value

	@typing.overload
	def __get__(self, instance: None, owner: typing.Any = None) -> 'Self':
		pass

	@typing.overload
	def __get__(self, instance: typing.Any, owner: typing.Any = None) -> T_co:
		pass

	def __get__(self, instance: typing.Any, owner: typing.Any = None) -> 'T_co|Self':
		if instance is None:
			return self

		return self.value

class MultiConfig(Config[T_co]):

	def __init__(self, val: T_co) -> None:
		super().__init__(val)
		self.values: 'dict[object, T_co]' = {}

	@typing.overload
	def __get__(self, instance: None, owner: typing.Any = None) -> 'Self':
		pass

	@typing.overload
	def __get__(self, instance: typing.Any, owner: typing.Any = None) -> T_co:
		pass

	def __get__(self, instance: typing.Any, owner: typing.Any = None) -> 'T_co|Self':
		if instance is None:
			return self

		return self.values.get(instance.config_id, self.value)