[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/sbin/asterisk -f -vvvg -c'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f9134ff1a4e in pjsip_inv_send_msg (inv=0x7f9094014988, tdata=tdata@entry=0x7f910c56e8e8) at ../src/pjsip-ua/sip_inv.c:3276
3276		PJ_ASSERT_RETURN((cseq=(pjsip_cseq_hdr*)pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL))!=NULL
[Current thread is 1 (Thread 0x7f9077f82700 (LWP 15283))]
(gdb)
(gdb)
(gdb)
(gdb) p *tdata->msg
$1 = {type = PJSIP_RESPONSE_MSG, line = {req = {method = {id = 183, name = {ptr = 0x7f91350bed89 "Session Progress", slen = 16}}, uri = 0x4e432033313a7061}, status = {code = 183, reason = {
        ptr = 0x7f91350bed89 "Session Progress", slen = 16}}}, hdr = {prev = 0x7f910c0597a8, next = 0x7f910c56f2c0, type = 540029233, name = {
      ptr = 0x76652d656e6f6870 <error: Cannot access memory at address 0x76652d656e6f6870>, slen = 3472337109488266853}, sname = {
      ptr = 0x7074723d610a0d30 <error: Cannot access memory at address 0x7074723d610a0d30>, slen = 2319970845552828781}, vptr = 0x6e6f6870656c6574}, body = 0x7f910c7039f0}
(gdb) p *inv
$2 = {obj_name = "inv0x7f91240b3bc8", '\000' <repeats 14 times>, pool = 0x7f91240b3b20, pool_prov = 0x7f90e00f81e0, pool_active = 0x7f910c0eff70, state = PJSIP_INV_STATE_DISCONNECTED, cancelling = 0,
  pending_cancel = 0, pending_bye = 0x0, cause = PJSIP_SC_SERVICE_UNAVAILABLE, cause_text = {ptr = 0x7f90e02307c8 "Unsupported transport (PJSIP_EUNSUPTRANSPORT)", slen = 45}, notify = 1, cb_called = 76,
  dlg = 0x7f91240b3bc8, role = PJSIP_ROLE_UAS, options = 7, neg = 0x7f9094014bb8, sdp_neg_flags = 1, invite_tsx = 0x0, invite_req = 0x0, last_answer = 0x0, last_ack = 0x0, last_ack_cseq = 0, mod_data = {
    0x0 <repeats 32 times>}, timer = 0x7f90e06d4748, following_fork = 0, ref_cnt = 0x7f9094014b60, updated_sdp_answer = 0}
(gdb) p *inv->invite_tsx
Cannot access memory at address 0x0
(gdb) p *inv->invite_tsx->cseq
Cannot access memory at address 0x70
(gdb) p *cseq
$3 = {prev = 0x7f910c56f610, next = 0x7f910c703518, type = PJSIP_H_CSEQ, name = {ptr = 0x7f91350c105a "CSeq", slen = 4}, sname = {ptr = 0x7f91350c105a "CSeq", slen = 4}, vptr =
    0x7f9135304080 <cseq_hdr_vptr>, cseq = 9725, method = {id = PJSIP_INVITE_METHOD, name = {ptr = 0x7f91350b98ee "INVITE", slen = 6}}}
(gdb) p *cseq->cseq
Cannot access memory at address 0x25fd
(gdb)