self.connection.readline | GeneratorExit #21

When user subscribe to channel and do nothing unsubscribe and disconnect this is the exception I got. Its sometimes appear when some messae passed between publisher and subscribers

[E 111217 01:07:03 client:49] None
Traceback (most recent call last):
File "/usr/local/lib/python2.6/dist-packages/brukva-0.0.1-py2.6.egg/brukva/client.py", line 926, in listen
data = yield async(self.connection.readline)()
GeneratorExit