david@warea:/home/david $  gdb /usr/bin/gnome-panel
GNU gdb (GDB) 7.1-6.mga1 (Mageia release 1)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i586-mageia-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/gnome-panel...Reading symbols from /usr/lib/debug/usr/bin/gnome-panel.debug...done.
done.
(gdb) run
Starting program: /usr/bin/gnome-panel 
[Thread debugging using libthread_db enabled]
[New Thread 0xb6ad8b70 (LWP 24971)]
Cannot register the panel shell: there is already one running.
[Thread 0xb6ad8b70 (LWP 24971) exited]

Program exited with code 0377.
(gdb) 

