illustrate defer for receiver being nil at later point.

defer_receiver_nil.go

package main

import (
	"fmt"
)

type Data struct {
	name string
}

func (d *Data) String() string {
	return fmt.Sprintf("Name: %s", d.name)
}

func (d *Data) Print() {
	fmt.Println(d)
}

func main() {
	ss := &Data{"Giney"}
	defer ss.Print()
  ss = &Data{"Hermionie"} // Expect to see: Name: Hermione
	fmt.Println(ss)
	
  ss = nil
  fmt.Println(ss) // Expect to see: <nil>
                  
  // Since the method is going to return here, it will execute deferred method ss.Print().
  // At this point ss is nil.
  // So what will happen here??? ERROR??
}