--- old/src/share/vm/opto/ifg.cpp	2015-10-14 13:54:18.727780438 +0200
+++ new/src/share/vm/opto/ifg.cpp	2015-10-14 13:54:18.620783025 +0200
@@ -683,7 +683,7 @@
   JVMState* jvms = n->jvms();
   uint debug_start = jvms ? jvms->debug_start() : 999999;
 
-  for (uint k = ((n->Opcode() == Op_SCMemProj) ? 0:1); k < n->req(); k++) {
+  for (uint k = ((n->Opcode() == Op_SCMemProj || n->Opcode() == Op_ShenandoahWBMemProj) ? 0:1); k < n->req(); k++) {
     Node* def = n->in(k);
     uint lid = _lrg_map.live_range_id(def);
     if (!lid) {