#58 Deadlock during teardown

[Simon Wright]

If an event queue teardown occurs while the event queue is handling an event, and the event action tries to post an event on the queue, it will block at Excluder.Post[_To_Self]:

  entry Post (The_Event : Event_P) when not Stopping is

This does require that the teardown preempts the dispatcher queue, but that's not at all impossible in a unit test environment.

[Simon Wright]

Using the Test event queue's Wait_Until_Idle will minimise the chance of this happening.