Fix Unable to use ResourceLoader in C# after threaded load in GDScript #92798

core/object/class_db.cpp

@@ -2310,4 +2310,11 @@ void ClassDB::cleanup() {
 	native_structs.clear();
 }
 
+// Array to use in optional parameters on methods and the DEFVAL_ARRAY macro.
+Array ClassDB::default_array_arg = Array::create_read_only();
+
+bool ClassDB::is_default_array_arg(const Array &p_array) {
+	return p_array.is_same_instance(default_array_arg);
+}
+
 //