|  | // Copyright (c) 2012, 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. | 
|  |  | 
|  | import "package:expect/expect.dart"; | 
|  |  | 
|  | class A { | 
|  | foo(a) { | 
|  | while (false) { | 
|  | // This call will make the builder want to put [this] as a phi. | 
|  | foo(0); | 
|  | } | 
|  | // This computation makes sure there will be a bailout version. | 
|  | return a + 42; | 
|  | } | 
|  | } | 
|  |  | 
|  | main() { | 
|  | Expect.equals(42, new A().foo(0)); | 
|  | Expect.throws(() => new A().foo("")); | 
|  | } |