diff -r 189942cdf585 -r 0e6577980181 src/share/classes/com/sun/tools/doclets/internal/toolkit/util/ClassUseMapper.java
--- a/src/share/classes/com/sun/tools/doclets/internal/toolkit/util/ClassUseMapper.java	Wed Aug 28 15:40:33 2013 -0700
+++ b/src/share/classes/com/sun/tools/doclets/internal/toolkit/util/ClassUseMapper.java	Thu Aug 29 11:41:20 2013 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -452,7 +452,7 @@
         } else if (doc instanceof Parameter) {
             annotations = ((Parameter) doc).annotations();
         } else {
-            throw new DocletAbortException();
+            throw new DocletAbortException("should not happen");
         }
         for (int i = 0; i < annotations.length; i++) {
             AnnotationTypeDoc annotationDoc = annotations[i].annotationType();