Fix crash in compiler in the presence of "new library_prefix()".

tests/language/new_prefix_test.dart

Index: tests/language/new_prefix_test.dart
===================================================================
--- tests/language/new_prefix_test.dart	(revision 0)
+++ tests/language/new_prefix_test.dart	(revision 0)
@@ -0,0 +1,9 @@
+// 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.
+
+import 'dart:core' as prefix;
+
+main() {
+  return new prefix(); /// 01: compile-time error

[ahe, 2013/08/27 18:51:42]

This test is not correct, see:
https://www.dartlang.org/docs/spec/latest/dart-language-specification.html#h....

[ngeoffray, 2013/08/28 06:24:30]

Good catch. Luckily, the dart analyzer caught that, so I was able to fix it
here:

https://codereview.chromium.org/23498006/

+}