// Copyright (c) 2018, 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 | |
class A implements B { | |
var x; | |
A(Object this.x); | |
} | |
class B { | |
factory B(String s) = A; | |
} | |
main() { | |
B(42 as dynamic); //# 01: runtime error | |
} |