--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/model/JavacElements.java	Thu Jan 10 10:28:51 2019 -0800
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/model/JavacElements.java	Thu Jan 10 10:34:30 2019 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2019, 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
@@ -436,7 +436,10 @@
 
     @DefinedBy(Api.LANGUAGE_MODEL)
     public PackageElement getPackageOf(Element e) {
-        return cast(Symbol.class, e).packge();
+        if (e.getKind() == ElementKind.MODULE)
+            return null;
+        else
+            return cast(Symbol.class, e).packge();
     }
 
     @DefinedBy(Api.LANGUAGE_MODEL)