Reading symbols from /lib/libnss_dns.so.2...done.
Loaded symbols for /lib/libnss_dns.so.2
#0  0x0074a4d3 in matching_3261 (p_msg=0x8203ad0, trans=0xbffc84b8, skip_method=4294967294) at t_lookup.c:222
222             if (memcmp(get_to(ack)->tag_value.s,p_cell->uas.local_totag.s,
(gdb) bt
#0  0x0074a4d3 in matching_3261 (p_msg=0x8203ad0, trans=0xbffc84b8, skip_method=4294967294) at t_lookup.c:222
#1  0x0074aaff in t_lookup_request (p_msg=0x8203ad0, leave_new_locked=1) at t_lookup.c:421
#2  0x0074d2a0 in t_newtran (p_msg=0x8203ad0) at t_lookup.c:1085
#3  0x0074516a in t_relay_to (p_msg=0x8203ad0, proxy=0x0, proto=0, replicate=0) at t_funcs.c:224
#4  0x00750410 in w_t_relay (p_msg=0x8203ad0, _foo=0x0, _bar=0x0) at tm.c:889
#5  0x0804fc81 in do_action (a=0x8117818, msg=0x8203ad0) at action.c:610
#6  0x0805099d in run_actions (a=0x8117818, msg=0x8203ad0) at action.c:718
#7  0x08073f08 in eval_elem (e=0x8117840, msg=0x8203ad0) at route.c:605
#8  0x08074392 in eval_expr (e=0x8117840, msg=0x8203ad0) at route.c:654
#9  0x080743ce in eval_expr (e=0x8117860, msg=0x8203ad0) at route.c:670
#10 0x0804ec95 in do_action (a=0x8117bc8, msg=0x8203ad0) at action.c:586
#11 0x0805099d in run_actions (a=0x8117630, msg=0x8203ad0) at action.c:718
#12 0x0804ffdf in do_action (a=0x8114f70, msg=0x8203ad0) at action.c:375
#13 0x0805099d in run_actions (a=0x8114f70, msg=0x8203ad0) at action.c:718
#14 0x0804ecd3 in do_action (a=0x8114fc0, msg=0x8203ad0) at action.c:603
#15 0x0805099d in run_actions (a=0x8114fc0, msg=0x8203ad0) at action.c:718
#16 0x0804ecd3 in do_action (a=0x8114fe8, msg=0x8203ad0) at action.c:603
#17 0x0805099d in run_actions (a=0x8114fe8, msg=0x8203ad0) at action.c:718
#18 0x0804ecd3 in do_action (a=0x8115010, msg=0x8203ad0) at action.c:603
#19 0x0805099d in run_actions (a=0x8115010, msg=0x8203ad0) at action.c:718
#20 0x0804ecd3 in do_action (a=0x8115038, msg=0x8203ad0) at action.c:603
#21 0x0805099d in run_actions (a=0x8115038, msg=0x8203ad0) at action.c:718
#22 0x0804ecd3 in do_action (a=0x8115060, msg=0x8203ad0) at action.c:603
#23 0x0805099d in run_actions (a=0x810fe88, msg=0x8203ad0) at action.c:718
#24 0x0806d062 in receive_msg (
    buf=0x80d61e0 "ACK sip:0369589963@sip.tld:5060 SIP/2.0\r\nMax-Forwards: 16\r\nContent-Length: 0\r\nVia: SIP/2.0/UDP 10.0.131.143:5060;branch=z9hG4bK70c4f1d78\r\nCall-ID: 337f1fcb3ced04087ce53c6d68fe0c73@10.0.131.143\r\nF"..., 
    len=590, rcv_info=0xbffc98c0) at receive.c:165
#25 0x080843cc in udp_rcv_loop () at udp_server.c:472
#26 0x0805cdaf in main_loop () at main.c:1056
#27 0x0805e40b in main (argc=1, argv=0xbffc9a84) at main.c:1592