---

Добавил в код:
     while(1) {
        k_sleep(K_FOREVER);
    }
Проблему это не решило

(gdb) c
Continuing.

Breakpoint 1, main (argc=-536810240, argv=0x8010c1f0 <z_main_thread>) at /home/vovan/ZEPHYR_RTOS/zephyrproject/zephyr/samples/pjsip/pjproject/pjsip-apps/src/samples/zephyr_pjsua.c:864
864         printk("--- Project build on: %s at %s ---\n",__DATE__,__TIME__);
(gdb) c
Continuing.

Breakpoint 2, start_connect (arg=0x80114bc0 <main_thread_argument>, arg@entry=<error reading variable: value has been optimized out>) at /home/vovan/ZEPHYR_RTOS/zephyrproject/zephyr/samples/pjsip/pjproject/pjsip-apps/src/samples/zephyr_pjsua.c:653
653         main_thread_arg *thread_arg = (main_thread_arg *)arg;
(gdb) n
660         status = pjsua_create();
(gdb) s