--- old/test/jtreg-ext/requires/VMProps.java	2018-11-07 10:28:01.990112173 +0300
+++ new/test/jtreg-ext/requires/VMProps.java	2018-11-07 10:28:01.586088497 +0300
@@ -254,7 +254,8 @@
      * @param flagName - flag name
      */
     private void vmOptFinalFlag(Map<String, String> map, String flagName) {
-        String value = String.valueOf(WB.getBooleanVMFlag(flagName));
+        Boolean bvalue = WB.getBooleanVMFlag(flagName);
+        String value = (bvalue == null) ? "false" : String.valueOf(bvalue);
         map.put("vm.opt.final." + flagName, value);
     }