--- old/src/hotspot/share/classfile/classLoaderData.hpp	2018-10-01 17:31:39.750427209 +0200
+++ new/src/hotspot/share/classfile/classLoaderData.hpp	2018-10-01 17:31:39.350430199 +0200
@@ -183,7 +183,7 @@
   bool keep_alive() const       { return _keep_alive > 0; }
 
   oop holder_phantom() const;
-  void classes_do(void f(Klass*));
+  void classes_do(void f(Klass* const));
   void loaded_classes_do(KlassClosure* klass_closure);
   void classes_do(void f(InstanceKlass*));
   void methods_do(void f(Method*));