call site 18 for io.StdCapture.reset
io/test/test_stdcapture.py - line 96
90
91
92
93
94
95
96
   def test_stdin_nulled_by_default(self):
       print "XXX this test may well hang instead of crashing"
       print "XXX which indicates an error in the underlying capturing"
       print "XXX mechanisms" 
       cap = self.getcapture()
       py.test.raises(IOError, "sys.stdin.read()")
->     out, err = cap.reset()