Crash gnome-shell by typing a space in overview

#!/usr/bin/python

import speechd
from pyatspi import Registry

class Echo(object):

    def __init__(self, name, component):
        self._client = speechd.SSIPClient(name=name, component=component)
        self._client.set_priority(speechd.Priority.MESSAGE)

        Registry.registerKeystrokeListener(self.onKey, mask=range(0,256))
        Registry.registerEventListener(self.onShowing, "object:state-changed:showing")

    def onShowing(self, event):
        pass

    def onKey(self, event):
        print "onKey: <%s>" % event.event_string
        self._client.key(event.event_string)

drone = Echo('Drone', None)
Registry.start()