如何使用内建函数recover终止panic过程

    1. func protect(g func()) {
    2.     defer func() {
    3.         log.Println("done")
    4.         // Println executes normally even if there is a panic
    5.         if x := recover(); x != nil {
    6.             log.Printf("run time panic: %v", x)
    7.         }
    8.     }()
    9.     log.Println("start")
    10.     g()
    11. }