TypeError when analyzing a module

[pylint-bot]

Originally reported by: Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore)

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Analyzing this project https://github.com/stackforge/anvil with Pylint leads to the following crash.

#!python

Traceback (most recent call last):
  File "C:\Python34\Scripts\pylint-script.py", line 9, in <module>
    load_entry_point('pylint==1.4.0', 'console_scripts', 'pylint')()
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\__init__.py", line 23, in run_pylint
    Run(sys.argv[1:])
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\lint.py", line 1271, in __init__
    linter.check(args)
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\lint.py", line 686, in check
    self._do_check(files_or_modules)
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\lint.py", line 810, in _do_check
    self.check_astroid_module(ast_node, walker, rawcheckers, tokencheckers)
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\lint.py", line 886, in check_astroid_module
    walker.walk(ast_node)
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\utils.py", line 869, in walk
    self.walk(child)
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\utils.py", line 866, in walk
    cb(astroid)
  File "C:\Python34\lib\site-packages\pylint-1.4.0-py3.4.egg\pylint\checkers\base.py", line 1003, in visit_class
    if not list(node.instance_attr_ancestors(attr)):
  File "C:\Python34\lib\site-packages\astroid-1.3.2-py3.4.egg\astroid\scoped_nodes.py", line 1112, in instance_attr_ancestors
    for astroid in self.ancestors(context=context):
  File "C:\Python34\lib\site-packages\astroid-1.3.2-py3.4.egg\astroid\scoped_nodes.py", line 1091, in ancestors
    context=context):
  File "C:\Python34\lib\site-packages\astroid-1.3.2-py3.4.egg\astroid\scoped_nodes.py", line 1077, in ancestors
    for baseobj in infer:
TypeError: '_Yes' object is not iterable

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/73

[pylint-bot]

Original comment by Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore):

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This doesn't reproduce anymore with the new astroid.