• Date you used flake8-return: 2019-05-16
• flake8-return version used, if any: 1.0.0
• Python version, if any: 3.7.1
• Operating System: Debian

Description

The R504 doesn't detect that the variable is conditionally modified prior to return.

What I Did

$ flake8 test.py 
test.py:5:12: R504 you shouldn`t assign value to variable if it will be use only as return value
$ cat test.py
def foo(bar):
    value = []
    if bar:
        value = value[:1]
    return value