(gdb) core out.dump
[New LWP 22757]
[New LWP 22758]
[New LWP 22759]
[New LWP 22760]
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `gnome-nettool'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f83d0df35f8 in raise () from /usr/lib/libc.so.6
[Current thread is 1 (Thread 0x7f83d3388940 (LWP 22757))]
(gdb) where
#0  0x00007f83d0df35f8 in raise () from /usr/lib/libc.so.6
#1  0x00007f83d0df4a7a in abort () from /usr/lib/libc.so.6
#2  0x00007f83d0e3205a in __libc_message () from /usr/lib/libc.so.6
#3  0x00007f83d0eb95d7 in __fortify_fail () from /usr/lib/libc.so.6
#4  0x00007f83d0eb95a0 in __stack_chk_fail () from /usr/lib/libc.so.6
#5  0x000000000041117d in lookup_foreach_with_tree ()
#6  0x0000000001f67fb0 in ?? ()
#7  0x00000000000000be in ?? ()
#8  0x0000000000000000 in ?? ()
(gdb) bt full
#0  0x00007f83d0df35f8 in raise () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007f83d0df4a7a in abort () from /usr/lib/libc.so.6
No symbol table info available.
#2  0x00007f83d0e3205a in __libc_message () from /usr/lib/libc.so.6
No symbol table info available.
#3  0x00007f83d0eb95d7 in __fortify_fail () from /usr/lib/libc.so.6
No symbol table info available.
#4  0x00007f83d0eb95a0 in __stack_chk_fail () from /usr/lib/libc.so.6
No symbol table info available.
#5  0x000000000041117d in lookup_foreach_with_tree ()
No symbol table info available.
#6  0x0000000001f67fb0 in ?? ()
No symbol table info available.
#7  0x00000000000000be in ?? ()
No symbol table info available.
#8  0x0000000000000000 in ?? ()
No symbol table info available.