[code-quality] pylint traceback AttributeError: 'NoneType' object has no attribute 'scope'

[Claudiu Popa]

On Tue, Aug 19, 2014 at 7:10 PM, Mark E. Hamilton <mhamilt at sandia.gov> wrote:
> With this test script:
>
> % cat test_util.py
> #!/usr/bin/env python
> """Some docstring"""
> import sys
> if __name__ == '__main__':
>     """Another docstring."""
>     pass
>
> pylint throws this traceback:
>
>
> % pylint --rcfile=/dev/null test_util.py
> Traceback (most recent call last):
>   File "/projects/sierra/linux_rh6/install/Python/2.7/bin/pylint", line 9,
> in <module>
>     load_entry_point('pylint==1.3.0', 'console_scripts', 'pylint')()
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/__init__.py",
> line 21, in run_pylint
>     Run(sys.argv[1:])
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/lint.py",
> line 991, in __init__
>     linter.check(args)
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/lint.py",
> line 585, in check
>     self.check_astroid_module(astroid, walker, rawcheckers, tokencheckers)
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/lint.py",
> line 662, in check_astroid_module
>     walker.walk(astroid)
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/utils.py",
> line 804, in walk
>     self.walk(child)
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/utils.py",
> line 804, in walk
>     self.walk(child)
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/utils.py",
> line 801, in walk
>     cb(astroid)
>   File
> "/projects/sierra/linux_rh6/install/Python/2.7/lib/python2.7/site-packages/pylint-1.3.0-py2.7.egg/pylint/checkers/base.py",
> line 558, in visit_discard
>     if (sibling.scope() is scope and
> AttributeError: 'NoneType' object has no attribute 'scope'
>
>
> Removing the second docstring (see below) resolves this error:
>
> % cat test_util.py
> #!/usr/bin/env python
> """Some docstring"""
> import sys
> if __name__ == '__main__':
>     # """Another docstring."""
>     pass
>


Hi, Mark.

Which version of astroid? I'm unable to replicate this using the
latest. Also, for these type of crashes, it's best to report them on
our bug tracker.
Thanks.