|  | // 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 { | 
|  | const A(int a); | 
|  | } | 
|  |  | 
|  | class B { | 
|  | final a; | 
|  | const B(dynamic v) // | 
|  | : a = A(v) | 
|  | //    ^^^^ | 
|  | // [analyzer] COMPILE_TIME_ERROR.INVALID_CONSTANT | 
|  | // [cfe] Constant evaluation error: | 
|  | //    ^ | 
|  | // [cfe] Constant expression expected. | 
|  | ; | 
|  | } | 
|  |  | 
|  | void main() { | 
|  | const B(""); | 
|  | //^^^^^^^^^^^ | 
|  | // [analyzer] COMPILE_TIME_ERROR.CONST_EVAL_THROWS_EXCEPTION | 
|  | } |