diff -r f0ef081cb15d -r 35192d9c2b76 src/hotspot/share/runtime/vmThread.hpp
--- a/src/hotspot/share/runtime/vmThread.hpp	Tue May 28 20:12:16 2019 +0200
+++ b/src/hotspot/share/runtime/vmThread.hpp	Fri May 31 11:17:55 2019 -0400
@@ -71,7 +71,7 @@
   VMOperationQueue();
 
   // Highlevel operations. Encapsulates policy
-  bool add(VM_Operation *op);
+  void add(VM_Operation *op);
   VM_Operation* remove_next();                        // Returns next or null
   VM_Operation* remove_next_at_safepoint_priority()   { return queue_remove_front(SafepointPriority); }
   VM_Operation* drain_at_safepoint_priority() { return queue_drain(SafepointPriority); }