call site 13 for execnet.Channel.receive
execnet/testing/test_gateway.py - line 344
337
338
339
340
341
342
343
344
345
346
   def test_channel_file_proxyclose(self): 
       channel = self.gw.remote_exec("""
               f = channel.makefile(proxyclose=True) 
               print >>f, "hello world" 
               f.close() 
               channel.send(42) 
           """)
->     first = channel.receive() + channel.receive()
       assert first.strip() == 'hello world' 
       py.test.raises(EOFError, channel.receive)