Fix argument length checks (#1595)

pkg/terminal/command.go

@@ -2057,7 +2057,7 @@ func checkpoints(t *Term, ctx callContext, args string) error {
 }
 
 func clearCheckpoint(t *Term, ctx callContext, args string) error {
-	if len(args) < 0 {
+	if len(args) == 0 {
 		return errors.New("not enough arguments to clear-checkpoint")
 	}
 	if args[0] != 'c' {

service/debugger/locations.go

@@ -72,7 +72,7 @@ func parseLocationSpec(locStr string) (LocationSpec, error) {
 	case '/':
 		if rest[len(rest)-1] == '/' {
 			rx, rest := readRegex(rest[1:])
-			if len(rest) < 0 {
+			if len(rest) == 0 {
 				return nil, malformed("non-terminated regular expression")
 			}
 			if len(rest) > 1 {