fails:Thread#raise on a running thread re-raises active exception
fails:Thread#raise on a sleeping thread re-raises active exception

unstable(causes system time to spike for remainder of process):Thread#raise on a sleeping thread can go unhandled
unstable(causes system time to spike for remainder of process):Thread#raise on a running thread raises a RuntimeError if no exception class is given
unstable(causes system time to spike for remainder of process):Thread#raise on a running thread raises the given exception
unstable(causes system time to spike for remainder of process):Thread#raise on a running thread raises the given exception with the given message
unstable(causes system time to spike for remainder of process):Thread#raise on a running thread can go unhandled
unstable(causes system time to spike for remainder of process):Thread#raise on a running thread re-raises active exception
unstable(causes system time to spike for remainder of process):Thread#raise on a sleeping thread re-raises active exception

Tag threads specs that trigger pathology as unstable. Once these specs run, the system time on OS X increases to ~50% of execution time.
Tag threads specs that trigger pathology as unstable.
Once these specs run, the system time on OS X increases to ~50% of
execution time.
