(gdb) bt
#0  0x00007fff7e89f09a in pjsip_uri_get_uri (uri=0x0) at /home/jcolp/development/asterisk/public/third-party/pjproject/source/pjsip/include/pjsip/sip_uri.h:272
#1  0x00007fff7e89f573 in find_aor (endpoint=0x555555cb2148, uri=0x0) at res_pjsip_path.c:50
#2  0x00007fff7e89fd21 in path_outgoing_response (endpoint=0x555555cb2148, contact=0x555555c7a3c8, tdata=0x7fff4400fec8) at res_pjsip_path.c:208
#3  0x00007fff8b0f379a in supplement_outgoing_response (tdata=0x7fff4400fec8, sip_endpoint=0x555555cb2148) at res_pjsip.c:4888
#4  0x00007fff8b0f39e1 in ast_sip_send_stateful_response (rdata=0x7ffeec00ad48, tdata=0x7fff4400fec8, sip_endpoint=0x555555cb2148) at res_pjsip.c:4928
#5  0x00007fff7d4cf5b1 in register_aor (rdata=0x7ffeec00ad48, endpoint=0x555555cb2148, aor=0x555555c7a720, aor_name=0x555555c7a6e0 "1107") at res_pjsip_registrar.c:923
#6  0x00007fff7d4d038b in registrar_on_rx_request (rdata=0x7ffeec00ad48) at res_pjsip_registrar.c:1108
#7  0x00007ffff78031eb in pjsip_endpt_process_rx_data (endpt=0x5555560465b8, rdata=0x7ffeec00ad48, p=0x7fff8b347640 <param>, p_handled=0x7fff780f4c6c) at ../src/pjsip/sip_endpoint.c:929
#8  0x00007fff8b112a9d in distribute (data=0x7ffeec00ad48) at res_pjsip/pjsip_distributor.c:955
#9  0x0000555555749498 in ast_taskprocessor_execute (tps=0x555555c71940) at taskprocessor.c:1185
#10 0x0000555555757138 in execute_tasks (data=0x555555c71940) at threadpool.c:1354
#11 0x0000555555749498 in ast_taskprocessor_execute (tps=0x5555560462c0) at taskprocessor.c:1185
#12 0x0000555555754a68 in threadpool_execute (pool=0x55555603bb30) at threadpool.c:367
#13 0x0000555555756868 in worker_active (worker=0x7fff4c001120) at threadpool.c:1137
#14 0x00005555557565d8 in worker_start (arg=0x7fff4c001120) at threadpool.c:1056
#15 0x0000555555760913 in dummy_start (data=0x7fff4c0010c0) at utils.c:1249
#16 0x00007ffff5b0c6db in start_thread (arg=0x7fff780f5700) at pthread_create.c:463
#17 0x00007ffff504588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) frame 1
#1  0x00007fff7e89f573 in find_aor (endpoint=0x555555cb2148, uri=0x0) at res_pjsip_path.c:50
50		sip_uri = pjsip_uri_get_uri(uri);
(gdb) frame 2
#2  0x00007fff7e89fd21 in path_outgoing_response (endpoint=0x555555cb2148, contact=0x555555c7a3c8, tdata=0x7fff4400fec8) at res_pjsip_path.c:208
208		aor = find_aor(endpoint, contact_hdr->uri);
(gdb) print contact_hdr->uri
$1 = (pjsip_uri *) 0x0