src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor6.java

*** 137,144 ****
       *
       * @since 9
       */
      @Override
      public R visitModule(ModuleElement e, P p) {
!         return visitUnknown(e, p);
      }
  }
--- 137,145 ----
       *
       * @since 9
       */
      @Override
      public R visitModule(ModuleElement e, P p) {
!         // Use implementation from interface default method
!         return ElementVisitor.super.visitModule(e, p);
      }
  }