Thread 32 "asterisk" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffa5b9b700 (LWP 171753)]
0x00007ffff7e04e9f in pjsip_inv_send_msg (inv=0x7ffe18380518, tdata=tdata@entry=0x7ffe8d94cc58) 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
(gdb) bt
#0  0x00007ffff7e04e9f in pjsip_inv_send_msg (inv=0x7ffe18380518, tdata=tdata@entry=0x7ffe8d94cc58) at ../src/pjsip-ua/sip_inv.c:3276
#1  0x00007fffa81afeff in ast_sip_session_send_response (session=session@entry=0x7ffe27991bf0, tdata=0x7ffe8d94cc58) at res_pjsip_session.c:1917
#2  0x00007fffa81b34fd in new_invite (invite=<synthetic pointer>, invite=<synthetic pointer>) at res_pjsip_session.c:3262
#3  handle_new_invite_request (rdata=0x7ffe5be2dbf8) at res_pjsip_session.c:3382
#4  session_on_rx_request (rdata=0x7ffe5be2dbf8) at res_pjsip_session.c:3446
#5  0x00007ffff7e24d2b in pjsip_endpt_process_rx_data (endpt=0x5555559af8c8, rdata=rdata@entry=0x7ffe5be2dbf8, p=p@entry=0x7fffa82d81c0 <param>, p_handled=p_handled@entry=0x7fffa5b9ace4)
    at ../src/pjsip/sip_endpoint.c:930
#6  0x00007fffa82a7943 in distribute (data=0x7ffe5be2dbf8) at res_pjsip/pjsip_distributor.c:955
#7  0x000055555570d8ab in ast_taskprocessor_execute (tps=tps@entry=0x5555562c8a20) at taskprocessor.c:1237
#8  0x00005555557147f8 in execute_tasks (data=0x5555562c8a20) at threadpool.c:1356
#9  0x000055555570d8ab in ast_taskprocessor_execute (tps=0x5555559ac670) at taskprocessor.c:1237
#10 0x0000555555715124 in threadpool_execute (pool=0x5555559ac5c0) at threadpool.c:367
#11 worker_active (worker=0x7fff78001160) at threadpool.c:1137
#12 worker_start (arg=arg@entry=0x7fff78001160) at threadpool.c:1056
#13 0x000055555571cdf8 in dummy_start (data=<optimized out>) at utils.c:1249
#14 0x00007ffff7668609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#15 0x00007ffff73ec103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) frame 0
#0  0x00007ffff7e04e9f in pjsip_inv_send_msg (inv=0x7ffe18380518, tdata=tdata@entry=0x7ffe8d94cc58) 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
(gdb) print tdata->msg
$1 = (pjsip_msg *) 0x7ffe8d94d5b0
(gdb) print cseq
$2 = (pjsip_cseq_hdr *) 0x7ffe8d94db00
(gdb) print cseq
$3 = (pjsip_cseq_hdr *) 0x7ffe8d94db00
(gdb) print inv
$4 = (pjsip_inv_session *) 0x7ffe18380518
(gdb) print inv->invite_tsx
$5 = (pjsip_transaction *) 0x0