Suppose this scenario:
$ pstree -upal
....
strace,26778 -ff -o jjjjj ./main
└─main,26779
├─main,26780
├─main,26781
├─main,26782
│ └─{main},26794
├─main,26783
├─main,26784
├─main,26785
├─main,26786
├─main,26787
├─main,26788
└─main,26789
...
Subprocesses (like 26782) use "prctl (PR_SET_PDEATHSIG, SIGKILL)" to
dead when "root main process (26779)" unexpectedly exits.
subprocesses creates threads (like 26794).
Now, when some threads exists, and I issue kill -KILL 26779, strace
writes following:
PANIC: handle_group_exit: 26794 leader 26782
I don't know what it is, but probably this is a bug.
--
Segmentation fault
------------------------------------------------------------------------------
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