Fix hidden_library2_test.

tests/corelib/hidden_library2_test.dart

Index: tests/corelib/hidden_library2_test.dart
diff --git a/tests/corelib/hidden_library2_test.dart b/tests/corelib/hidden_library2_test.dart
index d47aca72b1f5a85d44827c0cc60845fd0e9cf9c8..277ed54383b5fb7a044fbafbe7219a89c0ce7a32 100644
--- a/tests/corelib/hidden_library2_test.dart
+++ b/tests/corelib/hidden_library2_test.dart
@@ -1,6 +1,7 @@
 // Copyright (c) 2013, 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.
+
 // Test that the internal hidden library doesn't make problems with taking
 // stack-traces.
 
@@ -8,7 +9,7 @@ main() {
   print(['x'].where((_) {
     // We actually don't really care for the successful case. We just want to
     // make sure that the test doesn't crash when it is negative.
-    throw 'fisk';  /// 1: runtime error
+    throw 'fisk';  /// 01: runtime error
     return true;
-  }));
+  }).toList());
 }