Class Q1

Lib/test/test_descr.py:1473–1474

                __slots__ = ["__classcell__"]

        class Q1(metaclass=Meta, attr="__qualname__"):
            __slots__ = ["__qualname__"]
        self.assertEqual(Q1.__qualname__, C1.__qualname__[:-2] + "Q1")
        self.assertIsInstance(Q1.__dict__["__qualname__"],
                              types.MemberDescriptorType)