} {
		ss, vv := Clone(test.s), Clone(test.v)
		if !panics(func() { _ = Replace(ss, test.i, test.j, vv...) }) {
			t.Errorf("Replace %s: should have panicked", test.name)
		}
	}
}

func TestReplaceGrow(t *testing.T) {
	// When Replace needs to allocate a new slice, we want the original slice
	// to not be changed.
	a, b, c, d, e, f := 1, 2, 3, 4, 5, 6
	mem := []*int{&a, &b, &c, &d, &e, &f}