--- old/src/hotspot/share/classfile/classLoaderData.hpp	2018-03-14 13:33:54.683698447 -0400
+++ new/src/hotspot/share/classfile/classLoaderData.hpp	2018-03-14 13:33:54.087643756 -0400
@@ -292,6 +292,7 @@
 
   void unload();
   bool keep_alive() const       { return _keep_alive > 0; }
+  void ensure_loader_alive();
   void classes_do(void f(Klass*));
   void loaded_classes_do(KlassClosure* klass_closure);
   void classes_do(void f(InstanceKlass*));