List constructor sentinel must not implement 'int'

tests/lib/mirrors/constructor_list_test.dart

+// Copyright (c) 2016, 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.
+
+library test.constructor_lsit_test;
+
+@MirrorsUsed(targets: const [List])
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+
+main() {
+  ClassMirror cm;
+  MethodMirror mm;
+
+  cm = reflectClass(List);
+  print(cm);
+
+  var list1 = cm.newInstance(const Symbol(''), []).reflectee;
+  var list2 = cm.newInstance(const Symbol(''), [10]).reflectee;
+
+  Expect.equals(0, list1.length);
+  Expect.equals(10, list2.length);
+}