--- old/src/hotspot/share/opto/arraycopynode.cpp	2018-11-30 10:23:17.999083572 +0100
+++ new/src/hotspot/share/opto/arraycopynode.cpp	2018-11-30 10:23:17.850085101 +0100
@@ -497,7 +497,7 @@
   } else {
     if (in(TypeFunc::Control) != ctl) {
       // we can't return new memory and control from Ideal at parse time
-      assert(!is_clonebasic(), "added control for clone?");
+      assert(!is_clonebasic() || UseShenandoahGC, "added control for clone?");
       phase->record_for_igvn(this);
       return false;
     }