Bug Report

If a descriptor is implemented as a NamedTuple, the typing information on its __get__ method does not seem to be taken into account.

To Reproduce

import typing

class DescrVal:
    pass

class ClassDescr:
    def __get__(self, _instance: object, _owner: type | None = None) -> DescrVal:
        return DescrVal()


class TupleDescr(typing.NamedTuple):
    def __get__(self, _instance: object, _owner: type | None = None) -> DescrVal:
        return DescrVal()

class SomeClass:
    class_descr = ClassDescr()
    tuple_descr = TupleDescr()

typing.reveal_type(SomeClass.class_descr)
typing.reveal_type(SomeClass.tuple_descr)

Expected Behavior

ClassDescr and TupleDescr behave identically and accessing the descriptor returns a DescrVal instance.

Actual Behavior

mypy behaves as if the __get__ override weren’t there and assumes that the descriptors returns self instead of a DescrVal instance:

test.py:19: note: Revealed type is "test.DescrVal"
test.py:20: note: Revealed type is "tuple[(), fallback=test.TupleDescr]"

Your Environment

mypy 2.3.1 (also tested on 2.4.0) on Python 3.13.15.