diff -r c61f09122d3b -r 5529640c5f67 src/hotspot/share/ci/ciEnv.hpp
--- a/src/hotspot/share/ci/ciEnv.hpp	Fri Mar 15 18:59:21 2019 +0100
+++ b/src/hotspot/share/ci/ciEnv.hpp	Fri Mar 15 16:00:18 2019 -0400
@@ -465,7 +465,7 @@
   void record_out_of_memory_failure();
 
   // RedefineClasses support
-  void metadata_do(void f(Metadata*)) { _factory->metadata_do(f); }
+  void metadata_do(MetadataClosure* f) { _factory->metadata_do(f); }
 
   // Dump the compilation replay data for the ciEnv to the stream.
   void dump_replay_data(int compile_id);