--- old/src/jdk.dynalink/share/classes/jdk/dynalink/beans/ClassString.java	2016-11-16 15:55:42.000000000 +0100
+++ new/src/jdk.dynalink/share/classes/jdk/dynalink/beans/ClassString.java	2016-11-16 15:55:42.000000000 +0100
@@ -88,6 +88,7 @@
 import java.security.AccessControlContext;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
+import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
 import jdk.dynalink.internal.AccessControlContextFactory;
@@ -149,6 +150,11 @@
         return hashCode;
     }
 
+    @Override
+    public String toString() {
+        return "ClassString[" + Arrays.toString(classes) + "]";
+    }
+
     boolean isVisibleFrom(final ClassLoader classLoader) {
         return AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
             @Override