--- old/src/hotspot/share/gc/serial/defNewGeneration.cpp	2017-10-17 22:53:44.092284013 +0200
+++ new/src/hotspot/share/gc/serial/defNewGeneration.cpp	2017-10-17 22:53:43.820275220 +0200
@@ -41,6 +41,7 @@
 #include "gc/shared/space.inline.hpp"
 #include "gc/shared/spaceDecorator.hpp"
 #include "gc/shared/strongRootsScope.hpp"
+#include "gc/shared/weakProcessor.hpp"
 #include "logging/log.hpp"
 #include "memory/iterator.hpp"
 #include "memory/resourceArea.hpp"
@@ -658,6 +659,8 @@
   gc_tracer.report_tenuring_threshold(tenuring_threshold());
   pt.print_all_references();
 
+  WeakProcessor::weak_oops_do(&is_alive, &keep_alive);
+
   if (!_promotion_failed) {
     // Swap the survivor spaces.
     eden()->clear(SpaceDecorator::Mangle);