--- old/src/java.base/share/classes/jdk/internal/loader/BuiltinClassLoader.java	Tue Mar  8 21:59:16 2016
+++ new/src/java.base/share/classes/jdk/internal/loader/BuiltinClassLoader.java	Tue Mar  8 21:59:16 2016
@@ -92,7 +92,8 @@
 {
     static {
         if (!ClassLoader.registerAsParallelCapable())
-            throw new InternalError();
+            throw new InternalError("Classloader is not registered" + 
+                " as parallel capable.");
     }
 
     // parent ClassLoader