--- a/src/hotspot/share/jfr/recorder/stacktrace/jfrStackTrace.hpp	Thu Aug 29 12:53:05 2019 +0200
+++ b/src/hotspot/share/jfr/recorder/stacktrace/jfrStackTrace.hpp	Thu Aug 29 13:08:13 2019 +0200
@@ -68,9 +68,7 @@
   friend class ObjectSampleCheckpoint;
   friend class ObjectSampler;
   friend class OSThreadSampler;
-  friend class ProcessStackTrace;
   friend class StackTraceResolver;
-  friend class StackTraceWrite;
 
  private:
   const JfrStackTrace* _next;