我正在嘗試在 Go 中進行實驗，看看如果我在堆棧上存儲一個指向變量的指針，然后在原始變量離開作用域后訪問該變量會發生什么。package mainimport "fmt"var p chan bool;// a temp structtype v struct {    a int}func another_thread(vx *v) {    // this code should be executed after a() returns so vx should be a pointer to a value that's no longer on the stack    fmt.Printf("another_thread(): %p\n", vx);    vx.a = 4 // am I updating a dangling pointer that may have unintentional side effects??    fmt.Println(" - ", vx.a);    p<-true;}func update_v(vx *v) {    vx.a = 3;    fmt.Printf("update_v(): %p\n", vx);    go another_thread(vx)}func alloc_on_stack() {    // allocate v1 on the stack    var v1 v    v1.a = 1    fmt.Printf("alloc_on_stack(): %p\n", &v1);    // pass a pointer to v1 on the stack    update_v(&v1)    // print '3' to prove byref actually took it by reference    fmt.Println(" - ", v1.a);    // when the function returns, v1 should be popped off the stack}func main() {    p = make(chan bool)    alloc_on_stack();    fmt.Println("outside of alloc_on_stack, waiting");    <-p;    fmt.Println("done");}在 alloc_on_stack 中，v1 作為局部變量存儲在堆棧上。我將指向 v1 的指針傳遞給 update_v，后者將其傳遞給 another_thread。由 another_thread 直到 alloc_on_stack 完成后才執行。然而，當我運行該代碼時，我沒有收到任何錯誤，而是看到了以下內容：alloc_on_stack(): 0x1043617cupdate_v(): 0x1043617c -  3outside of alloc_on_stack, waitinganother_thread(): 0x1043617c -  4doneanother_thread 中的 vx 不應該是一個懸空指針嗎？