Improve type handling in Seq

helpers/general.go

@@ -175,6 +175,10 @@ func Seq(args ...interface{}) ([]int, error) {
 
 	intArgs := cast.ToIntSlice(args)
 
+	if len(intArgs) < 1 || len(intArgs) > 3 {
+		return nil, errors.New("Invalid argument(s) to Seq")
+	}
+
 	var inc int = 1
 	var last int
 	var first = intArgs[0]

helpers/general_test.go

@@ -154,7 +154,7 @@ func TestSeq(t *testing.T) {
 		{[]interface{}{2, 1, 1, 1}, false},
 		{[]interface{}{2001}, false},
 		{[]interface{}{}, false},
-		{[]interface{}{t}, []int{}},
+		{[]interface{}{t}, false},
 		{nil, false},
 	} {