--- old/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	Tue Oct  2 13:37:39 2018
+++ new/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	Tue Oct  2 13:37:38 2018
@@ -1049,6 +1049,9 @@
   // Rebuild the strong code root lists for each region
   rebuild_strong_code_roots();
 
+  // Purge code root memory
+  purge_code_root_memory();
+
   // Start a new incremental collection set for the next pause
   start_new_collection_set();