SEGFAULT on Thread isRunning(), in Common C++

Hi.

When the thread has exited from his run function, but is not deleted yet,
calling isRunning() for this thread results in a SEGFAULT.
This in contrary to what the API says: "Verifies if the thread is still
running or has already been terminated but not yet deleted", so the result
should be false, rather then SEGFAULT.

I need this functionality in order to implement some sort of a watchdog,
which will allow to detect non-running threads.

Any help on this will be very appreciated.
Stas.