golang中可触发panic的几种情况汇总

func main() {
    if err := someCriticalCheck(); err != nil {
        panic("Critical error: " + err.Error())
    }
}

func main() {
    arr := []int{1, 2, 3}
    fmt.Println(arr[3]) // panic: index out of range
}

func main() {
    var p *int
    fmt.Println(*p) // panic: runtime error: invalid memory address or nil pointer dereference
}

func main() {
    var i interface{} = "hello"
    s := i.(int) // panic: interface conversion: string is not int
}

func main() {
    result := 10 / 0 // panic: runtime error: integer divide by zero
    fmt.Println(result)
}

func main() {
    s := "abc"
    fmt.Println(s[3]) // panic: string index out of range
}

func main() {
    ch := make(chan int)
    close(ch)
    ch <- 1 // panic: send on closed channel
}

func main() {
    var ch chan int
    close(ch) // panic: close of nil channel
}

func main() {
    arr := make([]int, 1<<30) // 可能触发 panic: runtime error: cannot allocate
}

func main() {
    func() {
        defer func() { recover() }()
        infiniteRecursion() // panic: runtime error: stack overflow
    }()
}

func infiniteRecursion() {
    infiniteRecursion()
}

func main() {
    m := make(map[int]int)
    for i := 0; i < 100; i++ {
        go func() {
            m[1] = 1 // panic: concurrent map write
        }()
    }
    time.Sleep(time.Second)
}

type MyInterface interface {
    Method()
}

type MyStruct struct{}

func (m *MyStruct) Method() {} // 如果没有实现 Method，调用时会 panic

func main() {
    var i MyInterface = MyStruct{} // panic: MyStruct does not implement MyInterface (Method method has pointer receiver)
    i.Method()
}

func main() {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered:", r)
        }
    }()

    defer func() {
        panic("defer panic") // panic: defer panic
    }()

    panic("main panic")
}

func safeFunc() {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered from panic:", r)
        }
    }()

    // 可能触发 panic 的代码
    panic("something went wrong")
}

func main() {
    safeFunc()
    fmt.Println("Program continues after recovery")
}