Comment 5 for bug 187358

Backtrace didn't work here is the output of it. Looks from the stack trace that the first thing to fix is to check system->priv is valid before dereferencing it. (from stacktrace source.txt)

GNU gdb 6.7.1-debian
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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This GDB was configured as "i486-linux-gnu"...
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(gdb) handle SIG33 pass nostop noprint
Signal Stop Print Pass to program Description
SIG33 No No Yes Real-time event 33
(gdb) set pagination 0
(gdb) run
Starting program: /usr/bin/gnome-terminal
[Thread debugging using libthread_db enabled]
[New Thread 0xb6d6e6b0 (LWP 25035)]

Program exited normally.
(gdb) backtrace full
No stack.
(gdb) info registers
The program has no registers now.
(gdb) thread apply all backtrace
No registers.
(gdb) quit