--- old/src/share/vm/c1/c1_LinearScan.cpp	2017-07-02 11:30:40.000000000 +0200
+++ new/src/share/vm/c1/c1_LinearScan.cpp	2017-07-02 11:30:40.000000000 +0200
@@ -2381,6 +2381,8 @@
       case Bytecodes::_if_acmpne :
         assert(stack_end >= -Bytecodes::depth(code), "must have non-empty expression stack at if bytecode");
         break;
+      default:
+        break;
     }
   }
 }