Inconsistent undefined-variable reporting

[jolaf]

Bug description

The following code:

# pylint: disable=multiple-statements, no-self-use, unused-argument, used-before-assignment
class A:
    def x(self, o: A) -> bool: ...
    def z(self) -> A: ...
    def t(self) -> A: ...

produces only 1 error report instead of 3.

Command used

pylint test.pyi

Pylint output

test.pyi:5: [E0602(undefined-variable), A.z] Undefined variable 'A'

Expected behavior

Error should be reported in lines 3, 4 and 5.

Pylint version

pylint 2.12.1
astroid 2.9.0
Python 3.8.10 (default, Sep 28 2021, 16:10:42) 
[GCC 9.3.0]

OS / Environment

Ubuntu 20.04.3 LTS \n \l

Linux ubuntu 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15 20:00:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

[jacobtylerwalls]

Might be the same as #5326, and in fact, I would be willing to rephrase it if you can help me :-).

[jacobtylerwalls]

I think what they share is the second instance of the name "consuming" the first instance where the first instance is a type annotation.

[jolaf]

Might be the same as #5326, and in fact, I would be willing to rephrase it if you can help me :-).

How can I help?

[cdce8p]

Pylint doesn't work too well for pyi files at the moment 😕
I would recommend a type checker for these cases. E.g. mypy or pyright.