AttributeError: 'NoneType' object has no attribute 'send_request'

[Cas]

Found two bugs with the same AttributeError that need investigating.

 https://bugzilla.redhat.com/show_bug.cgi?id=666616

 https://bugs.launchpad.net/ubuntu/+source/deluge/+bug/756388

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/deluge/ui/gtkui/menubar.py", line 256, in on_menuitem_quitdaemon_activate
    self.window.quit(shutdown=True)
  File "/usr/lib/pymodules/python2.7/deluge/ui/gtkui/mainwindow.py", line 163, in quit
    client.daemon.shutdown()
  File "/usr/lib/pymodules/python2.7/deluge/ui/client.py", line 504, in __call__
    return self.daemon.call(self.base, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/deluge/ui/client.py", line 310, in call
    self.protocol.send_request(request)
AttributeError: 'NoneType' object has no attribute 'send_request'

[Cas]

Unable to replicate and I can only surmise that deluged has already shutdown by the time this request is sent however I added a exception statement to prevent crashing the client.

 d3c3d64c