Pylint: no-member false positive when using @classmethod constructors

[jnsnow]

Steps to reproduce

Given a sample snippet like this:

class Bar:
    @classmethod
    def from_xyz(cls):
        return cls()

class Foo(Bar):
    @classmethod
    def from_xyz(cls):
        return super(Foo, cls).from_xyz()
    def Baz(self):
        print("Hello World!")


x = Foo.from_xyz()
x.Baz()

Current behavior

pylint will print the error:
lint.py:15:0: E1101: Instance of 'Bar' has no 'Baz' member (no-member)

Expected behavior

pylint will either recognize that:

1. The result of calling from_xyz is of type Foo (and has a Baz member), or
2. The result of cls() is indeterminate and checking members is not possible.

and as a result, will not print a false positive.

pylint --version output

pylint 2.3.1
astroid 2.2.5
Python 3.7.4 (default, Jul 9 2019, 16:32:37)
[GCC 9.1.1 20190503 (Red Hat 9.1.1-1)]

[PCManticore]

Yeah, right now pylint emits the error as it cannot constrain the result of from_xyz to Foo. Definitely a bug that's worth fixing.