(gdb) bt full
#0  0x00007f43ee8dac2c in pj_pool_alloc () from /usr/lib64/libpj.so.2
No symbol table info available.
#1  0x00007f43ee8dac75 in pj_pool_calloc () from /usr/lib64/libpj.so.2
No symbol table info available.
#2  0x00007f43ede4c729 in pj_pool_zalloc (size=832, pool=<optimized out>) at /usr/include/pj/pool.h:476
No locals.
#3  create_local_sdp (session=0x7f442c001868, offer=0x7f43d4484bf8, inv=<optimized out>) at res_pjsip_session.c:2880
        successful = 0x0
#4  0x00007f43ede4e284 in new_invite (data=0x7f442c033a28) at res_pjsip_session.c:2126
        invite = 0x7f442c033a28
        tdata = 0x0
        timer = {min_se = 3581597496, sess_expires = 32579}
        sdp_info = 0x7f43d4484bd8
        local = 0x0
        __PRETTY_FUNCTION__ = "new_invite"
#5  0x00000000005ba2b8 in ast_taskprocessor_execute (tps=tps@entry=0x2a01bb8) at taskprocessor.c:967
        local = {local_data = 0x20, data = 0x2a01bb8}
        t = 0x7f442c002e00
        size = <optimized out>
        __PRETTY_FUNCTION__ = "ast_taskprocessor_execute"
#6  0x00000000005c1ac8 in execute_tasks (data=0x2a01bb8) at threadpool.c:1322
        tps = 0x2a01bb8
#7  0x00000000005ba2b8 in ast_taskprocessor_execute (tps=0x1599308) at taskprocessor.c:967
        local = {local_data = 0x7f43b6c77de0, data = 0x7f43dc01e2c0}
        t = 0x7f43d45a5120
        size = <optimized out>
        __PRETTY_FUNCTION__ = "ast_taskprocessor_execute"
#8  0x00000000005c1ebc in threadpool_execute (pool=0x1599838) at threadpool.c:351
No locals.
#9  worker_active (worker=0x7f43dc01e2b8) at threadpool.c:1105
No locals.
#10 worker_start (arg=arg@entry=0x7f43dc01e2b8) at threadpool.c:1024
        worker = 0x7f43dc01e2b8
        saved_state = <optimized out>
        __PRETTY_FUNCTION__ = "worker_start"
#11 0x00000000005cc5d9 in dummy_start (data=<optimized out>) at utils.c:1235
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {139929430647792, 8557709514232373389, 139929708686512, 0, 
                139928806066624, 17, -8627635777969512307, 8557709898747814029}, __mask_was_saved = 0}}, __pad = {0x7f43b6c77ef0, 
            0x0, 0x7f44506b5870 <__elf_set___libc_thread_subfreeres_element___rpc_thread_destroy__>, 0x7f44506b5878}}
        __cancel_arg = 0x7f43b6c78700
        __not_first_call = <optimized out>
        ret = <optimized out>
        a = {start_routine = 0x5c1b00 <worker_start>, data = 0x7f43dc01e2b8, name = <optimized out>}
#12 0x00007f4450e5fce2 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#13 0x00007f44503f08cd in clone () from /lib64/libc.so.6