One test method cannot trigger another failing, synchronous test method (in another Runner) without a RTE about reflex-unit HOT 5 CLOSED

This one may not be fixable, since ActionScript does not allow you to set a 
default
error-handler (and the Error in question is being thrown after an event is 
dispatched).

Perhaps the RunNotifier could be made aware of all associated ITestWatcher 
classes.
Then, instead of notifying them via an Event, it could call methods on them 
directly
and inform them of what has happened.

In this situation, catching a resulting Error would be possible.

Upon further review of this issue, I'm not sure it's worth resolving. It may be 
fair
to make the assertion that runtime errors and/or assertion failures can *only* 
occur
within (a) the test method itself or (b) one of the wrapped event handlers 
(created
using addAsync).