--- old/src/java.base/share/classes/java/lang/System.java	Tue Mar  8 21:59:04 2016
+++ new/src/java.base/share/classes/java/lang/System.java	Tue Mar  8 21:59:04 2016
@@ -1919,7 +1919,7 @@
         // base module needs to be loose
         Module base = Object.class.getModule();
         if (base == null)
-            throw new InternalError();
+            throw new InternalError("base module is null");
         Modules.addReads(base, null);
 
         // module system initialized