(gdb) bt full
#0  queued_task_pushed (data=0x7f3ca3596238) at threadpool.c:552
        tpd = 0x7f3ca3596238
        pool = 0x0
        was_empty = -1585492536
        existing_active = <optimized out>
#1  0x00000000005b9f78 in ast_taskprocessor_execute (tps=tps@entry=0x1807588) at taskprocessor.c:967
        local = {local_data = 0x20, data = 0x7f3ce40008b0}
        t = 0x7f3ca0f10420
        size = <optimized out>
        __PRETTY_FUNCTION__ = "ast_taskprocessor_execute"
#2  0x00000000005ba0d0 in default_tps_processing_function (data=data@entry=0x1807228) at taskprocessor.c:185
        listener = 0x1807228
        tps = 0x1807588
        pvt = 0x17ffb30
        sem_value = 0
        __PRETTY_FUNCTION__ = "default_tps_processing_function"
#3  0x00000000005cc299 in dummy_start (data=<optimized out>) at utils.c:1235
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {25195520, -5228501819576860429, 140728148323344, 0, 
                139899746388416, 507904, 5262812492194857203, -5228501091517513485}, __mask_was_saved = 0}}, __pad = {
            0x7f3cf2affef0, 0x0, 0x0, 0x0}}
        __cancel_arg = 0x7f3cf2b00700
        __not_first_call = <optimized out>
        ret = <optimized out>
        a = {start_routine = 0x5ba090 <default_tps_processing_function>, data = 0x1807228, name = <optimized out>}
#4  0x00007f3d5ae72ce2 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#5  0x00007f3d5a4038cd in clone () from /lib64/libc.so.6
No symbol table info available.