// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file | |
// for details. All rights reserved. Use of this source code is governed by a | |
// BSD-style license that can be found in the LICENSE file. | |
// @dart = 2.9 | |
import 'dart:collection'; | |
class MyList extends Object with ListMixin { | |
int length = 0; | |
operator [](index) => null; | |
void operator []=(index, value) {} | |
} | |
main() { | |
new MyList().length; | |
} |