import "math"

func checkClearSlice() {
	s := []int{1, 2, 3}
	clear(s)
	for i := range s {
		if s[i] != 0 {
			panic("clear not zeroing slice elem")
		}
	}

	clear([]int{})
}

func checkClearMap() {
	m1 := make(map[int]int)
	m1[0] = 0
	m1[1] = 1
	clear(m1)
	if len(m1) != 0 {
		panic("m1 is not cleared")
	}

	// map contains NaN keys is also cleared.
	m2 := make(map[float64]int)