--- old/src/hotspot/share/gc/cms/parNewGeneration.cpp	2018-05-08 09:41:31.599156174 +0200
+++ new/src/hotspot/share/gc/cms/parNewGeneration.cpp	2018-05-08 09:41:31.314147367 +0200
@@ -1471,8 +1471,9 @@
 void ParNewGeneration::ref_processor_init() {
   if (_ref_processor == NULL) {
     // Allocate and initialize a reference processor
+    _span_discoverer.set_span(_reserved);
     _ref_processor =
-      new ReferenceProcessor(_reserved,                  // span
+      new ReferenceProcessor(&_span_discoverer,          // span
                              ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
                              ParallelGCThreads,          // mt processing degree
                              refs_discovery_is_mt(),     // mt discovery