another small adjustment by the way just to ensure the object on stack ist the same as the one serialized further in case the object does not implement locking on mutation (besides it's mor efficient to not fetch the same value twice)

(cherry picked from commit cdd843a998)

lib/base/serializer.cpp

@@ -159,7 +159,7 @@ static Object::Ptr SerializeObject(const Object::Ptr& input, int attributeTypes,
 
 		Value value = input->GetField(i);
 		stack.Push(field.Name, value);
-		fields.emplace_back(field.Name, SerializeInternal(input->GetField(i), attributeTypes, stack));
+		fields.emplace_back(field.Name, SerializeInternal(value, attributeTypes, stack));
 		stack.Pop();
 	}