Keep empty and dash operands with runnable parents

internal/cobra/parse.go

@@ -408,7 +408,10 @@ func flagUsage(flag commandmeta.Flag) string {
 
 func splitRoutingPrefix(argv []string) ([]string, []string) {
 	for index, argument := range argv {
-		if argument == "--" || (strings.HasPrefix(argument, "-") && argument != "-") {
+		// Empty strings and "-" can be operands but never command names.
+		// Keep them out of Find, which could skip them and select a child
+		// from a later operand instead of retaining the runnable parent.
+		if argument == "" || strings.HasPrefix(argument, "-") {
 			return commandpath.CloneTokens(argv[:index]), commandpath.CloneTokens(argv[index:])
 		}
 	}