--- a/nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/AbstractJavaLinker.java	Wed Jul 05 21:09:59 2017 +0200
+++ b/nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/AbstractJavaLinker.java	Thu Dec 24 16:52:06 2015 +0530
@@ -790,7 +790,7 @@
      */
     @SuppressWarnings("unused")
     private Object getPropertyGetterHandle(final Object id) {
-        return propertyGetters.get(id);
+        return propertyGetters.get(String.valueOf(id));
     }
 
     // Type is MethodHandle(BeanLinker, MethodType, LinkerServices, Object, String, Object), of which the two "Object"