.

wcfs/δbtail_test.go

@@ -339,8 +339,8 @@ func IntSets(N int) chan []int {
 func intSets(ch chan []int, lo, hi int) {
 	ch <- []int{}   // ø
 
-	for i := lo; i < hi; i++ {
-		if i < hi-1 {
+	if lo < hi {
+		for i := lo; i < hi; i++ {
 			chTail := make(chan []int)
 			go intSets(chTail, i+1, hi)
 			for tail := range chTail {
@@ -360,9 +360,8 @@ func TestIntSets(t *testing.T) {
 
 	I := func(v ...int) []int { return v }
 	want := [][]int{I(),
-			I(0),
-			I(0,1), I(0,2), I(0,1,2),
-			I(1),
+			I(0), I(0,1), I(0,1,2), I(0,2),
+			I(1), I(1,2),
 			I(2),
 		}