$ flake8
Traceback (most recent call last):
File ".../bin/flake8", line 11, in <module>
sys.exit(main())
File ".../lib/python2.7/site-packages/flake8/main.py", line 33, in main
report = flake8_style.check_files()
File ".../lib/python2.7/site-packages/flake8/engine.py", line 181, in check_files
return self._retry_serial(self._styleguide.check_files, paths=paths)
File ".../lib/python2.7/site-packages/flake8/engine.py", line 172, in _retry_serial
return func(*args, **kwargs)
File ".../lib/python2.7/site-packages/pep8.py", line 1840, in check_files
self.input_dir(path)
File ".../lib/python2.7/site-packages/pep8.py", line 1876, in input_dir
runner(os.path.join(root, filename))
File ".../lib/python2.7/site-packages/flake8/engine.py", line 126, in input_file
return fchecker.check_all(expected=expected, line_offset=line_offset)
File ".../lib/python2.7/site-packages/pep8.py", line 1574, in check_all
self.check_ast()
File ".../lib/python2.7/site-packages/pep8.py", line 1521, in check_ast
for lineno, offset, text, check in checker.run():
File ".../lib/python2.7/site-packages/mutable_defaults.py", line 44, in run
unexplored_nodes.extend(node.body)
TypeError: 'Name' object is not iterable
$ pip freeze
flake8==2.5.4
flake8-mutable==1.0.3
mccabe==0.4.0
pep8==1.7.0
pycodestyle==2.0.0
pyflakes==1.0.0