fails:Thread#alive? describes a running thread
fails:Thread#alive? describes a sleeping thread
fails:Thread#alive? describes a blocked thread
fails:Thread#alive? describes a completed thread
fails:Thread#alive? describes a killed thread
fails:Thread#alive? describes a thread with an uncaught exception
fails:Thread#alive? describes a dying running thread
fails:Thread#alive? describes a dying sleeping thread
fails:Thread#alive? returns true for a killed but still running thread
