--- a/src/hotspot/share/opto/lcm.cpp	Fri Jul 13 11:21:55 2018 +0800
+++ b/src/hotspot/share/opto/lcm.cpp	Thu Jul 12 16:31:28 2018 +0200
@@ -646,7 +646,7 @@
     }
   } // End of for all ready nodes in worklist
 
-  assert(idx >= 0, "index should be set");
+  guarantee(idx >= 0, "index should be set");
   Node *n = worklist[(uint)idx];      // Get the winner
 
   worklist.map((uint)idx, worklist.pop());     // Compress worklist