Task threads are not killed at exit

[BogDan]

Hello,

Not all the task threads are killed when a task exits or it crashes.
I've created a  simple example here: http://paste.kde.org/760274
After application crashes (line 22), test thread is still alive, I still can
see "Test thread alive" message printed.

If I call exit or return instead to crash the task, the test thread is still alive .

Cheers,
BogDan.