Recover from deep panic

---

examples/deep-panic/deep_panic.go

package main

import (
    "fmt"
)

func main() {
    fmt.Println("Before")
    fmt.Println()

    dividend := 16
    divisors := []int{8, 4, 0, 2}
    for _, divisor := range divisors {
        mydiv(dividend, divisor)
    }

    fmt.Println()
    fmt.Println("After")
}

func mydiv(a, b int) {
    defer func() {
        if err := recover(); err != nil {
            fmt.Printf("Error: %v\n", err)
            //log.Print("Error: ", err)
            //panic(err)
        }
    }()
    externalDiv(a, b)
}

func externalDiv(a, b int) {
    //fmt.Println("Start")

    res := a / b
    fmt.Printf("%v / %v = %v\n", a, b, res)

    //fmt.Println("End")
}

Before

16 / 8 = 2
16 / 4 = 4
Error: runtime error: integer divide by zero
16 / 2 = 8

After