diff -r 13921e9e3cac -r fb51e2ae730e src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSet.cpp
--- a/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSet.cpp	Mon Oct 28 18:43:54 2019 +0100
+++ b/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSet.cpp	Mon Oct 28 21:17:47 2019 +0100
@@ -754,9 +754,15 @@
   }
 };
 
+template <typename T>
+class EmptyStub {
+ public:
+  bool operator()(T const& value) { return true; }
+};
+
 typedef SerializePredicate<MethodPtr> MethodPredicate;
 typedef JfrPredicatedTypeWriterImplHost<MethodPtr, MethodPredicate, write__method> MethodWriterImplTarget;
-typedef Wrapper<KlassPtr, Stub> KlassCallbackStub;
+typedef Wrapper<KlassPtr, EmptyStub> KlassCallbackStub;
 typedef JfrTypeWriterHost<MethodWriterImplTarget, TYPE_METHOD> MethodWriterImpl;
 typedef MethodIteratorHost<MethodWriterImpl, KlassCallbackStub, BitMapFilter, false> MethodWriter;