SF bug #425836:  Reference leak in filter(). Mark Hammond claimed that the iterized filter() forgot to decref the iterator upon return.  He was right!
SF bug #425836:  Reference leak in filter().
Mark Hammond claimed that the iterized filter() forgot to decref the
iterator upon return.  He was right!

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator