t.Fatalf("wrong value: got %+v, want foo", x)
	}
	v.Store("barbaz")
	x = v.Load()
	if xx, ok := x.(string); !ok || xx != "barbaz" {
		t.Fatalf("wrong value: got %+v, want barbaz", x)
	}
}

func TestValuePanic(t *testing.T) {
	const nilErr = "sync/atomic: store of nil value into Value"
	const badErr = "sync/atomic: store of inconsistently typed value into Value"
	var v Value
	func() {
		defer func() {
			err := recover()