panic.go

panic.go

package main

import (
        "errors"
        "log"
)

func final() {
        log.Printf("cleaning up")
        if c := recover(); c != nil {
                if err,ok := c.(error); ok {
                        // Do something useful...then:                                          
                        log.Fatal(err.Error())
                } else {
                        log.Printf("unexpected panic")
                        panic(c)
                }
        }
}

func main() {
        log.Printf("hello")
        defer final()
        log.Printf("goodbye")
        panic(errors.New("oh dear!"))
}