--- a/src/hotspot/share/classfile/classLoaderDataGraph.hpp	Mon Oct 07 15:48:26 2019 +0200
+++ b/src/hotspot/share/classfile/classLoaderDataGraph.hpp	Mon Oct 07 16:48:42 2019 +0200
@@ -156,6 +156,7 @@
 class LockedClassesDo : public KlassClosure {
   typedef void (*classes_do_func_t)(Klass*);
   classes_do_func_t _function;
+  bool _do_lock;
 public:
   LockedClassesDo();  // For callers who provide their own do_klass
   LockedClassesDo(classes_do_func_t function);