How to check if a thread is alive?

[EastInspection USA]

Hi there,

In my program, one thread runs into a "die" statement, but when I use
threads->list to get a list of thread ids, the "dead" thread is still there.
How come?

The thread is not a detached thread.

version 5.8.0.
screen output:
thread failed to start: Tread(jade): simulated die. at poll.pl line 242.

Thanks.
J.