logilab-astng #52006 Running pylint recursively eventually crashes [validation pending]

Sometimes when I run pylint recursively on a project, it crashes in the middle.
Running it manually on all files works.

Here's an example of a stack trace:

Traceback (most recent call last):
File "/opt/xpyv/bin/pylint", line 5, in <module>
pkg_resources.run_script('pylint==0.22.0', 'pylint')
File "build/bdist.linux-i686/egg/pkg_resources.py", line 448, in run_script
File "build/bdist.linux-i686/egg/pkg_resources.py", line 1166, in run_script
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/EGG-INFO/scripts/pylint", line 4, in <module>
lint.Run(sys.argv[1:])
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/lint.py", line 858, in __init__
linter.check(args)
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/lint.py", line 489, in check
self.check_astng_module(astng, walker, rawcheckers)
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/lint.py", line 563, in check_astng_module
walker.walk(astng)
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/utils.py", line 520, in walk
self.walk(child)
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/utils.py", line 520, in walk
self.walk(child)
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/utils.py", line 517, in walk
cb(astng)
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/checkers/base.py", line 632, in visit_function
self._recursive_check_names(args, node)
File "/opt/xpyv/lib/python2.6/site-packages/pylint-0.22.0-py2.6.egg/pylint/checkers/base.py", line 655, in _recursive_check_names
self._recursive_check_names(arg.elts, node)
File "/opt/xpyv/lib/python2.6/site-packages/logilab_astng-0.21.0-py2.6.egg/logilab/astng/bases.py", line 73, in __getattr__
return getattr(self._proxied, name)
AttributeError: 'Class' object has no attribute 'elts'

priorityimportant
typebug
done in0.21.1
load0.200
load left0.000
closed by<not specified>