package main

import "fmt"

func f() {
	fmt.Println("============= f")
	type S []S
	var s S
	s = make(S, 1); s[0] = s // this line is different
	fmt.Printf("%p\n", &s)
	fmt.Println(len(s)) // 1
	s = s[0]
	fmt.Printf("%p\n", &s)
	fmt.Println(len(s)) // 1
	s = s[0] // ok
}

func g() {
	fmt.Println("============= g")
	type S []S
	var s S
	s = S{0: s} // this line is different
	fmt.Printf("%p\n", &s) // 0xabcd
	fmt.Println(len(s))    // 1
	s = s[0]
	fmt.Printf("%p\n", &s) // 0xabcd
	fmt.Println(len(s))    // 0
	s = s[0] // panic
}

func main() {
	f()
	g()
}