swift

c9abb0bc - [Backtracing] Improve warning message about thread suspension failure.

[Backtracing] Improve warning message about thread suspension failure. In the event that the backtracer fails to suspend a thread, it emits a warning message. Unfortunately the exact meaning of this message isn't obvious and it doesn't make clear that it's a secondary problem (that is, you've already crashed at this point). Update the message to make things clearer. rdar://116593541