#0  0xb7a5d45d in initreqprep (req=0xb7a41ea0, p=0x8485680, sipmethod=4) at chan_sip.c:7038
7038                    ast_string_field_set(p, fromuser, l);
(gdb) bt
#0  0xb7a5d45d in initreqprep (req=0xb7a41ea0, p=0x8485680, sipmethod=4) at chan_sip.c:7038
#1  0xb7a7dd91 in sip_send_mwi_to_peer (peer=0x8492738) at chan_sip.c:7414
#2  0xb7a83bde in do_monitor (data=0x0) at chan_sip.c:15845
#3  0x080e01d7 in dummy_start (data=0x8174c78) at utils.c:867
#4  0xb7f384fb in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb7e52e5e in clone () from /lib/tls/i686/cmov/libc.so.6
(gdb) bt full
#0  0xb7a5d45d in initreqprep (req=0xb7a41ea0, p=0x8485680, sipmethod=4) at chan_sip.c:7038
        __zz__ = 0x0
        __dlen__ = 8
        invite_buf = '\0' <repeats 255 times>
        invite = 0xb7a41d58 ""
        invite_max = 256
        from = '\0' <repeats 255 times>
        to = '\0' <repeats 255 times>
        tmp = '\0' <repeats 255 times>
        tmp2 = '\0' <repeats 255 times>
        l = 0xb7aab640 "asterisk"
        n = 0xb7aab640 "asterisk"
        urioptions = 0xb7a9bf18 ""
#1  0xb7a7dd91 in sip_send_mwi_to_peer (peer=0x8492738) at chan_sip.c:7414
        p = (struct sip_pvt *) 0x8485680
        newmsgs = 0
        oldmsgs = 0
#2  0xb7a83bde in do_monitor (data=0x0) at chan_sip.c:15845
        res = <value optimized out>
        sip = <value optimized out>
        t = 1259304460
        fastrestart = 1
        lastpeernum = 53
        curpeernum = 55
        reloading = <value optimized out>
        __PRETTY_FUNCTION__ = "do_monitor"
#3  0x080e01d7 in dummy_start (data=0x8174c78) at utils.c:867
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {135744648, 0, -1213973616, -1213975592, 684130454, 2091088361}, __mask_was_saved = 0}}, __pad = {
    0xb7a43490, 0x0, 0x0, 0x0}}
        __cancel_arg = (void *) 0xb7a43b90
        not_first_call = <value optimized out>
        ret = <value optimized out>
#4  0xb7f384fb in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#5  0xb7e52e5e in clone () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.