Golang slices sometimes alias their underlying array, and sometimes don't.

aliasing-slices.go

// Prints false, false, false, true, false, true, true, false, true.

package main

func main() {
	for i := 0; i < 10; i++ {
		println(doesItAlias(i))
	}
}

func doesItAlias(length int) bool {
	a := []int{}
	for i := 0; i < length; i++ {
		a = append(a, i)
	}
	b := a[0:]
	c := a[0:]
	b = append(b, 42)
	c = append(c, 103)
	return b[length] == c[length]
}