src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/ScriptRuntime.java

*** 371,383 ****
       *
       * @param scope Scope to merge.
       * @return prototype object after merge
       */
      public static ScriptObject mergeScope(final ScriptObject scope) {
!         final ScriptObject global = scope.getProto();
!         global.addBoundProperties(scope);
!         return global;
      }
  
      /**
       * Call a function given self and args. If the number of the arguments is known in advance, you can likely achieve
       * better performance by {@link Bootstrap#createDynamicInvoker(String, Class, Class...) creating a dynamic invoker}
--- 371,383 ----
       *
       * @param scope Scope to merge.
       * @return prototype object after merge
       */
      public static ScriptObject mergeScope(final ScriptObject scope) {
!         final ScriptObject parentScope = scope.getProto();
!         parentScope.addBoundProperties(scope);
!         return parentScope;
      }
  
      /**
       * Call a function given self and args. If the number of the arguments is known in advance, you can likely achieve
       * better performance by {@link Bootstrap#createDynamicInvoker(String, Class, Class...) creating a dynamic invoker}