Cannot access class defined type aliases from self or cls [name-defined] #14022

class Test:
    Vector = list[float]

    # MyPy happy with class name access:
    def my_vec_working(self):
        vec: Test.Vector = [1.0, 2.0, 3.0]  # <--- No error
        return vec

    # Mypy errors when accessing with self:
    def my_vec_errors_1(self):
        vec: self.Vector = [1.0, 2.0, 3.0]  # <--- Name "self.Vector" is not defined  [name-defined]
        return vec

    # Mypy errors with cls access in class method:
    @classmethod
    def my_vec_errors_2(cls):
        vec: cls.Vector = [1.0, 2.0, 3.0]  # <--- Name "self.Vector" is not defined  [name-defined]
        return vec