--- a/src/hotspot/share/gc/g1/g1FullGCMarker.cpp	Tue Oct 16 13:14:18 2018 +0200
+++ b/src/hotspot/share/gc/g1/g1FullGCMarker.cpp	Tue Oct 16 13:16:11 2018 +0200
@@ -23,6 +23,7 @@
  */
 
 #include "precompiled.hpp"
+#include "classfile/classLoaderData.hpp"
 #include "gc/g1/g1FullGCMarker.inline.hpp"
 #include "gc/shared/referenceProcessor.hpp"
 #include "memory/iterator.inline.hpp"
@@ -36,7 +37,7 @@
     _mark_closure(worker_id, this, G1CollectedHeap::heap()->ref_processor_stw()),
     _verify_closure(VerifyOption_G1UseFullMarking),
     _stack_closure(this),
-    _cld_closure(mark_closure()) {
+    _cld_closure(mark_closure(), ClassLoaderData::_claim_strong) {
   _oop_stack.initialize();
   _objarray_stack.initialize();
 }