Loaded symbols for /usr/lib/asterisk/modules/chan_sip.so
#0  0x00c26498 in strcasecmp () from /lib/tls/libc.so.6
(gdb) bt
#0  0x00c26498 in strcasecmp () from /lib/tls/libc.so.6
#1  0x0808eddc in __ast_context_destroy (con=0x0, registrar=0x3e239d "pbx_config") at pbx.c:5322
#2  0x0808f2cb in ast_merge_contexts_and_delete (extcontexts=0x3e4fc0, registrar=0x3e239d "pbx_config") at pbx.c:3744
#3  0x003e1c85 in pbx_load_module () at pbx_config.c:1782
#4  0x003e21d8 in handle_reload_extensions (fd=1, argc=2, argv=0xbfe6c460) at pbx_config.c:1426
#5  0x08097dab in ast_cli_command (fd=1, s=0x70 "") at cli.c:1364
#6  0x080c043f in main (argc=2, argv=0xbfe6c984) at asterisk.c:1014
(gdb) bt full
#0  0x00c26498 in strcasecmp () from /lib/tls/libc.so.6
No symbol table info available.
#1  0x0808eddc in __ast_context_destroy (con=0x0, registrar=0x3e239d "pbx_config") at pbx.c:5322
        tmp = (struct ast_context *) 0x9e3aa60
        tmpl = (struct ast_context *) 0x0
        tmpi = Variable "tmpi" is not available.