rt-thread4.1.0Bete版线程中使用mdelay后，线程结束无法自动回收是为什么？

list_timer看看心跳和定时器

实测可以删掉

加上软定时器的结果

我已经解决了：
从rt-4.0.3复制如下一段代码到4.1.0
const volatile rt_list_t *l = (const volatile rt_list_t *)&rt_thread_defunct;
// rt-4.0.3 idle.c
/* Return whether there is defunctional thread to be deleted. */
rt_inline int _has_defunct_thread(void)
{
    /* The rt_list_isempty has prototype of "int rt_list_isempty(const rt_list_t *l)".
     * So the compiler has a good reason that the rt_thread_defunct list does
     * not change within rt_thread_idle_excute thus optimize the "while" loop
     * into a "if".
     *
     * So add the volatile qualifier here. */
    const volatile rt_list_t *l = (const volatile rt_list_t *)&rt_thread_defunct;
    return l->next != l;
}
复制到rt-4.1.0 idle.c中
/**
* @Brief Dequeue a thread from defunct queue.
*/
rt_thread_t rt_thread_defunct_dequeue(void)
{
    register rt_base_t lock;
    rt_thread_t thread = RT_NULL;
   // rt_list_t *l = &_rt_thread_defunct;
    // 替换到这里
    const volatile rt_list_t *l = (const volatile rt_list_t *)&_rt_thread_defunct;
    // 以下代码省略...
如果出现和我一样的问题，可以试试这样修改。 main.c启用了软timer延时


动态线程栈和控制块也被正确释放，ps线程列表也没有出现close线程了。