#0  0x00dbd402 in __kernel_vsyscall ()
#1  0x00129159 in raise () from /lib/libc.so.6
#2  0x0012a6e3 in abort () from /lib/libc.so.6
#3  0x0015da0b in __libc_message () from /lib/libc.so.6
#4  0x0016332f in malloc_consolidate () from /lib/libc.so.6
#5  0x0016534a in _int_malloc () from /lib/libc.so.6
#6  0x00166c6c in malloc () from /lib/libc.so.6
#7  0x0016ad61 in strdup () from /lib/libc.so.6
#8  0x08059344 in ast_verbose (fmt=0x30f19c "%sTransmitting (no NAT) to %s:%d:\n%s\n---\n")
    at include/asterisk/utils.h:350
#9  0x002e507c in send_request (p=0x93eb6c0, req=0xb7aa10b8, reliable=XMIT_CRITICAL, seqno=102)
    at chan_sip.c:1685
#10 0x002ee490 in transmit_invite (p=0x93eb6c0, sipmethod=3, sdp=0, init=2) at chan_sip.c:5804
#11 0x002f2ee3 in sip_poke_peer (peer=0x93ab8a8) at chan_sip.c:12617
#12 0x002f3067 in sip_poke_all_peers () at chan_sip.c:14328
#13 0x002fa162 in do_monitor (data=0x0) at chan_sip.c:14397
#14 0x080b3b4b in dummy_start (data=0x936a9e0) at utils.c:531
#15 0x0026241b in start_thread () from /lib/libpthread.so.0
#16 0x001c927e in clone () from /lib/libc.so.6