--- a/hotspot/src/share/vm/opto/loopnode.hpp	Wed Sep 16 15:54:32 2015 -0700
+++ b/hotspot/src/share/vm/opto/loopnode.hpp	Thu Sep 17 08:08:47 2015 +0200
@@ -290,6 +290,7 @@
     if (phi() == NULL) {
       return NULL;
     }
+    assert(phi()->is_Phi(), "should be PhiNode");
     Node *ln = phi()->in(0);
     if (ln->is_CountedLoop() && ln->as_CountedLoop()->loopexit() == this) {
       return (CountedLoopNode*)ln;