1.1 --- a/ChangeLog	Mon Mar 22 18:23:24 2010 +0100
     1.2 +++ b/ChangeLog	Tue Mar 23 09:47:19 2010 +0100
     1.3 @@ -4,6 +4,8 @@
     1.4  --  
     1.5  
     1.6  2010-03-22 -- 0.20.0
     1.7 +    * fix #20464: raises “TypeError: '_Yes' object is not iterable” on list inference
     1.8 +
     1.9      * fix #19882: pylint hangs
    1.10  
    1.11      * fix #20759: crash on pyreverse UNARY_OP_METHOD KeyError '~'
    1.12 @@ -22,8 +24,10 @@
    1.13      * Ned Batchelder patch to properly import eggs with Windows line
    1.14        endings.  This fixes a problem with pylint not being able to
    1.15        import setuptools.
    1.16 +
    1.17      * Winfried Plapper patches fixing .op attribute value for AugAssign nodes,
    1.18        visit_ifexp in nodes_as_string
    1.19 +
    1.20      * Edward K. Ream / Tom Fleck patch closes #19641 (maximum recursion depth
    1.21        exceeded" messages w/ python 2.6), see https://bugs.launchpad.net/pylint/+bug/456870
    1.22  

     2.1 --- a/protocols.py	Mon Mar 22 18:23:24 2010 +0100
     2.2 +++ b/protocols.py	Tue Mar 23 09:47:19 2010 +0100
     2.3 @@ -107,13 +107,16 @@
     2.4      for other in other.infer(context):
     2.5          if isinstance(other, self.__class__) and operator == '+':
     2.6              node = self.__class__()
     2.7 -            elts = [n for elt in self.elts for n in elt.infer(context)]
     2.8 -            elts += [n for elt in other.elts for n in elt.infer(context)]
     2.9 +            elts = [n for elt in self.elts for n in elt.infer(context)
    2.10 +                    if not n is YES]
    2.11 +            elts += [n for elt in other.elts for n in elt.infer(context)
    2.12 +                     if not n is YES]
    2.13              node.elts = elts
    2.14              yield node
    2.15          elif isinstance(other, nodes.Const) and operator == '*':
    2.16              node = self.__class__()
    2.17 -            elts = [n for elt in self.elts for n in elt.infer(context)] * other.value
    2.18 +            elts = [n for elt in self.elts for n in elt.infer(context)
    2.19 +                    if not n is YES] * other.value
    2.20              node.elts = elts
    2.21              yield node
    2.22          elif isinstance(other, Instance) and not isinstance(other, nodes.Const):

     3.1 --- a/test/unittest_inference.py	Mon Mar 22 18:23:24 2010 +0100
     3.2 +++ b/test/unittest_inference.py	Tue Mar 23 09:47:19 2010 +0100
     3.3 @@ -1056,5 +1056,38 @@
     3.4                  break
     3.5          else:
     3.6              self.fail('expected to find an instance of Application in %s' % infered)
     3.7 +
     3.8 +    def test_list_inference(self):
     3.9 +        """#20464"""
    3.10 +        code = '''
    3.11 +import optparse
    3.12 +
    3.13 +A = []
    3.14 +B = []
    3.15 +
    3.16 +def test():
    3.17 +  xyz = [
    3.18 +    "foobar=%s" % options.ca,
    3.19 +  ] + A + B
    3.20 +
    3.21 +  if options.bind is not None:
    3.22 +    xyz.append("bind=%s" % options.bind)
    3.23 +  return xyz
    3.24 +
    3.25 +def main():
    3.26 +  global options
    3.27 +
    3.28 +  parser = optparse.OptionParser()
    3.29 +  (options, args) = parser.parse_args()
    3.30 +
    3.31 +Z = test()
    3.32 +        '''
    3.33 +        astng = builder.string_build(code, __name__, __file__)
    3.34 +        infered = list(astng['Z'].infer())
    3.35 +        self.assertEquals(len(infered), 1, infered)
    3.36 +        self.assertIsInstance(infered[0], Instance)
    3.37 +        self.assertIsInstance(infered[0]._proxied, nodes.Class)
    3.38 +        self.assertEquals(infered[0]._proxied.name, 'list')
    3.39 +
    3.40  if __name__ == '__main__':
    3.41      unittest_main()