--- old/src/hotspot/share/gc/g1/g1FullCollector.cpp	2018-05-02 11:08:51.958817642 +0200
+++ new/src/hotspot/share/gc/g1/g1FullCollector.cpp	2018-05-02 11:08:51.673808899 +0200
@@ -112,7 +112,9 @@
     _preserved_marks_set(true),
     _serial_compaction_point(),
     _is_alive(heap->concurrent_mark()->next_mark_bitmap()),
-    _is_alive_mutator(heap->ref_processor_stw(), &_is_alive) {
+    _is_alive_mutator(heap->ref_processor_stw(), &_is_alive),
+    _always_subject_to_discovery(),
+    _is_subject_mutator(heap->ref_processor_stw(), &_always_subject_to_discovery) {
   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
 
   _preserved_marks_set.init(_num_workers);