False positive no-value-for-parameter in Pylint 2.5 #3563
Description
Steps to reproduce
In bug.py:
"""Whatever"""
import os
def good(*parts):
"""All good"""
return os.path.join(*parts)
def bad(*parts):
"""False positive below this line"""
ret = os.path.join(*parts)
return retRun pylint bug.py (no user config necessary).
Current behavior
In Pylint==2.5.0 (see below for detailed versions):
************* Module bug
bug.py:10:10: E1120: No value for argument 'a' in function call (no-value-for-parameter)
------------------------------------------------------------------
Your code has been rated at 1.67/10 (previous run: 1.67/10, +0.00)
With Pylint<2.5:
-------------------------------------------------------------------
Your code has been rated at 10.00/10 (previous run: 1.67/10, +8.33)
Expected behavior
good and bad are effectively the same thing, and both are bug-free. I would expect no errors from Pylint.
Also, I don't get why the argument name is inferred as a?
>>> import inspect
>>> inspect.signature(os.path.join)
<Signature (path, *paths)>pylint --version output
For Pylint==2.5.0 (first case above):
pylint 2.5.0
astroid 2.4.0
Python 3.6.8 (tags/v3.6.8:3c6b436a57, Dec 23 2018, 23:31:17) [MSC v.1916 32 bit (Intel)]
For Pylint<2.5:
pylint 2.4.4
astroid 2.3.3
Python 3.6.8 (tags/v3.6.8:3c6b436a57, Dec 23 2018, 23:31:17) [MSC v.1916 32 bit (Intel)]