TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'

[asottile]

In GitLab by @bnomis on Aug 23, 2016, 20:33

The attached file causes flake8 to crash with the error

TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'

flake8 installed via pip

Python 2.7.11
pip 8.1.2 from /Users/rcxue/venv/lib/python2.7/site-packages (python 2.7)
setuptools 26.0.0
flake8 3.0.4 (mccabe: 0.5.2, pyflakes: 1.2.3, pycodestyle: 2.0.0) CPython 2.7.11 on Darwin

pyflake-test.py

[asottile]

In GitLab by @sigmavirus24 on Aug 25, 2016, 05:14

So this can be more simply reproduced with

foo(
    'a'='b'
)

Notice the quotes around the keyword. I tested invalid syntax on Flake8 and didn't run across this bug it seems the AST library behaves different in some cases. Sorry for this. It'll be fixed up in the next release.

[asottile]

In GitLab by @martyanov on Sep 15, 2016, 06:06

I get the same error with this code:

from somepackage import one, two, three,

Notice the trailing comma. Is it covered by the changes?