--- old/src/java.base/share/classes/jdk/internal/loader/BuiltinClassLoader.java	2016-04-25 14:50:45.000000000 -0700
+++ new/src/java.base/share/classes/jdk/internal/loader/BuiltinClassLoader.java	2016-04-25 14:50:45.000000000 -0700
@@ -115,7 +115,7 @@
             URL url = null;
             if (mref.location().isPresent()) {
                 try {
-                    url = mref.location().get().toURL();
+                    url = mref.location().getWhenPresent().toURL();
                 } catch (MalformedURLException e) { }
             }
             this.loader = loader;