@[heap]
struct User {
mut:
	name string
}

fn id(arr []int) []int {
	return arr[1..2]
}

fn rere(a &User) &User {
	return a
}

fn main() {
	arr := [1, 2, 3, 4, 5]
	mut s := id(arr)
	s[0] = 0
	id(arr)[0] = 0

	ja := User{
		name: 'foo'
	}
	rere(ja).name = 'bar'
}