<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _timeout_expired(self):
 """ A timeout was supplied during setup, and the time has run out. """

        self._did_timeout = True
        try:
            self.transport.signalProcess('TERM')
        except error.ProcessExitedAlready:
            # XXX why don't we just always do this?
            self.transport.loseConnection()

        fail = Failure(RuntimeError("timeout while launching Tor"))
        self._maybe_notify_connected(fail)