go recover runtime error test

recover.go

package main

import (
	"fmt"
	"runtime"
)

func a(f func()) {
	defer func() {
		if rv := recover(); rv != nil {
			fmt.Println("recovered", rv)
			if _, ok := rv.(runtime.Error); ok {
				fmt.Println("runtime error")
			}
		}
	}()
	f()
}

func main() {
	fmt.Println("Hello, playground")
	a(func() {
		var a []int
		a[123] = 1

	})

	a(func() {
		panic("asdasd")

	})
}