TypeError when analyzing Python file about pylint HOT 10 CLOSED

#!python

import inspect
def dummy_func():
    pass
argspec = inspect.getargspec(dummy_func)
print argspec.args

#!python

import collections
Point = collections.namedtuple('Point', ['x', 'y'])
p = Point(x=1.0, y=2.0)
print "Area: %.1f" % (p.x * p.y,)

#!bash

bash$> pylint namedtuple.py

#!bash

Traceback (most recent call last):
  File "/g8/software/config/python/pylint/lint.py", line 1065, in <module>
    Run(sys.argv[1:])
  File "/g8/software/config/python/pylint/lint.py", line 1010, in __init__
    linter.check(args)
  File "/g8/software/config/python/pylint/lint.py", line 599, in check
    self.check_astroid_module(astroid, walker, rawcheckers, tokencheckers)
  File "/g8/software/config/python/pylint/lint.py", line 685, in check_astroid_module
    walker.walk(astroid)
  File "/g8/software/config/python/pylint/utils.py", line 662, in walk
    self.walk(child)
  File "/g8/software/config/python/pylint/utils.py", line 662, in walk
    self.walk(child)
  File "/g8/software/config/python/pylint/utils.py", line 662, in walk
    self.walk(child)
  File "/g8/software/config/python/pylint/utils.py", line 662, in walk
    self.walk(child)
  File "/g8/software/config/python/pylint/utils.py", line 662, in walk
    self.walk(child)
  File "/g8/software/config/python/pylint/utils.py", line 659, in walk
    cb(astroid)
  File "/g8/software/config/python/pylint/checkers/typecheck.py", line 174, in visit_getattr
    if is_super(owner) or getattr(owner, 'type', None) == 'metaclass':
  File "/g8/software/tools/python/2.6.6/osx106_x64/lib/python2.6/site-packages/astroid/bases.py", line 51, in __getattr__
    return getattr(self._proxied, name)
  File "/g8/software/tools/python/2.6.6/osx106_x64/lib/python2.6/site-packages/astroid/scoped_nodes.py", line 680, in _class_type
    for base in klass.ancestors(recurs=False):
  File "/g8/software/tools/python/2.6.6/osx106_x64/lib/python2.6/site-packages/astroid/scoped_nodes.py", line 801, in ancestors
    for baseobj in stmt.infer(context):
TypeError: unbound method infer() must be called with Tuple instance as first argument (got InferenceContext instance instead)