Comment 8 for bug 1378888

Looking at ./Lib/optparse.py of Python 2.7.6 :
   def parse_args(self, args=None, values=None):
....
   stop = self._process_args(largs, rargs, values)

  _process_args()
       _process_args()
           _process_long_opt()

Probably the issue is in :

    def _process_long_opt(self, rargs, values):
 ...

??