(gdb) bt full
#0  0x0090df76 in raise () from /lib/libc.so.6
No symbol table info available.
#1  0x0090f941 in abort () from /lib/libc.so.6
No symbol table info available.
#2  0x00944f5b in __libc_message () from /lib/libc.so.6
No symbol table info available.
#3  0x0094b2fc in malloc_consolidate () from /lib/libc.so.6
No symbol table info available.
#4  0x0094ca0f in _int_free () from /lib/libc.so.6
No symbol table info available.
#5  0x00950220 in free () from /lib/libc.so.6
No symbol table info available.
#6  0x080c2900 in __ast_context_destroy ()
No symbol table info available.
#7  0x080c5394 in ast_merge_contexts_and_delete ()
No symbol table info available.
#8  0x008a2e5e in __i686.get_pc_thunk.bx () from /usr/lib/asterisk/modules/pbx_config.so
No symbol table info available.
#9  0x008aa238 in ?? () from /usr/lib/asterisk/modules/pbx_config.so
No symbol table info available.
#10 0x008a7ec3 in ?? () from /usr/lib/asterisk/modules/pbx_config.so
No symbol table info available.
#11 0x01dd3ad4 in ?? ()
No symbol table info available.
#12 0x00000002 in ?? ()
No symbol table info available.
#13 0x00000000 in ?? ()
No symbol table info available.