Issue 940 - Exception generating js for prefixed toplevel fields

tests/language/src/Prefix21Test.dart

Index: tests/language/src/Prefix21Test.dart
diff --git a/tests/language/src/Prefix21Test.dart b/tests/language/src/Prefix21Test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..283b886b3887ed0ec413cc221f97e2963defb7f6
--- /dev/null
+++ b/tests/language/src/Prefix21Test.dart
@@ -0,0 +1,12 @@
+// Copyright (c) 2011, 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("Prefix21");
+#import("Prefix21GoodLib.dart", prefix: "good");
+#import("Prefix21BadLib.dart", prefix: "bad");
+
+main() {
+  Expect.equals(good.getValue(42), 42);
+  Expect.equals(bad.getValue(42), 84);
+}