diff -r 9baa91bc7567 -r fc6cfe40e32a src/hotspot/share/opto/ifnode.cpp
--- a/src/hotspot/share/opto/ifnode.cpp	Fri Jul 13 11:21:55 2018 +0800
+++ b/src/hotspot/share/opto/ifnode.cpp	Thu Jul 12 16:31:28 2018 +0200
@@ -387,6 +387,7 @@
     } else {
       assert( 0, "do not know how to handle this guy" );
     }
+    guarantee(proj != NULL, "sanity");
 
     Node *proj_path_data, *proj_path_ctrl;
     if( proj->Opcode() == Op_IfTrue ) {