Incorrect "Value '<val>' is unsubscriptable" with class method type overloading

[awarrier99]

Bug description

from typing import Literal, overload


class Test:
    __config: dict[str, list[int] | list[str] | list[float]]

    def __init__(self):
        self.__config = {"a": [0, 1], "b": ["abc", "def"], "c": [1.1, 2.2]}

    @overload
    def func(self, s: Literal["a"]) -> list[int]: ...
    @overload
    def func(self, s: Literal["b"]) -> list[str]: ...
    @overload
    def func(self, s: Literal["c"]) -> list[float]: ...
    def func(self, s: Literal["a"] | Literal["b"] | Literal["c"]) -> list[int] | list[str] | list[float]:
        return self.__config[s]


test = Test()
# pylint: disable=invalid-name
lst = test.func("c")
num = lst[0]

Configuration

No response

Command used

pylint test.py

Pylint output

************* Module test
test.py:40:6: E1136: Value 'lst' is unsubscriptable (unsubscriptable-object)

Expected behavior

I would expect to be able to index the returned list with no linting error. It's worth noting that this same example works when the functions are defined at the module level, it seems to be only an issue within a class.

Pylint version

pylint 3.0.3
astroid 3.0.3
Python 3.11.5 (main, Aug 24 2023, 15:18:16) [Clang 14.0.3 (clang-1403.0.22.14.1)]

OS / Environment

macOS Sonoma 14.1.1

Additional dependencies

No response

[jacobtylerwalls]

Thanks for the report. '@overload' is not yet supported. Will close as a duplicate of pylint-dev/astroid#1015 / #5712

[awarrier99]

@jacobtylerwalls ah sorry I obviously didn't search through the existing issues well enough. Thanks for the context