call site 7 for execnet.Channel.receive
execnet/testing/test_gateway.py - line 327
318
319
320
321
322
323
324
325
326
327
328
   def test_channel_file(self): 
       channel = self.gw.remote_exec("""
               f = channel.makefile() 
               print >>f, "hello world" 
               f.close() 
               channel.send(42) 
           """)
       first = channel.receive() + channel.receive()
       assert first.strip() == 'hello world' 
->     second = channel.receive() 
       assert second == 42