src/share/classes/com/sun/imageio/plugins/jpeg/JFIFMarkerSegment.java

*** 556,565 ****
--- 556,566 ----
          }
      }
  
      // Could put reason codes in here to be parsed in writeJFXXSegment
      // in order to provide more meaningful warnings.
+     @SuppressWarnings("serial") // JDK-implementation class
      private class IllegalThumbException extends Exception {}
  
      /**
       * Writes out a new JFXX extension segment, without saving it.
       */