RTThread_startup()函数返回线程没起来请教各位这是什么故障啊

rtthread_startup()函数跑完，没有故障问题，函数返回，线程没起来，请教各位这是什么故障啊！

int rtthread_startup(void)
{
rt_hw_interrupt_disable();
/* board level initialization

• NOTE: please initialize heap inside board initialization.
  /
  rt_hw_board_init();
  /show RT-Thread version/
  rt_show_version();
  /timer system initialization/
  rt_system_timer_init();
  /scheduler system initialization/
  rt_system_scheduler_init();
  #ifdef RT_USING_SIGNALS
  /signal system initialization/
  rt_system_signal_init();
  #endif
  /create init_thread/
  rt_application_init();
  /timer thread initialization/
  rt_system_timer_thread_init();
  /idle thread initialization/
  rt_thread_idle_init();
  #ifdef RT_USING_SMP
  rt_hw_spin_lock(&_cpus_lock);
  #endif /RT_USING_SMP/
  /start scheduler/
  rt_system_scheduler_start();
  /never reach here */
  return 0;
  }
  前面的硬件配置都没故障了，正常应该不会跑到return的呀