diff -r 6598f2825b1f -r 9c150f2b1fea src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeManager.hpp
--- a/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeManager.hpp	Thu Aug 29 03:29:45 2019 +0200
+++ b/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeManager.hpp	Thu Aug 29 12:53:05 2019 +0200
@@ -33,6 +33,7 @@
  public:
   static bool initialize();
   static void clear();
+  static bool is_new_constant_registered();
   static void write_types(JfrCheckpointWriter& writer);
   static void write_threads(JfrCheckpointWriter& writer);
   static void notify_types_on_rotation();