--- a/src/hotspot/share/jfr/leakprofiler/chains/rootSetClosure.cpp	Tue Oct 16 13:14:18 2018 +0200
+++ b/src/hotspot/share/jfr/leakprofiler/chains/rootSetClosure.cpp	Tue Oct 16 13:16:11 2018 +0200
@@ -92,7 +92,7 @@
   SaveRestoreCLDClaimBits save_restore_cld_claim_bits;
   RootSetClosureMarkScope mark_scope;
 
-  CLDToOopClosure cldt_closure(closure);
+  CLDToOopClosure cldt_closure(closure, ClassLoaderData::_claim_strong);
   ClassLoaderDataGraph::always_strong_cld_do(&cldt_closure);
   CodeBlobToOopClosure blobs(closure, false);
   Threads::oops_do(closure, &blobs);