--- old/src/java.base/share/classes/java/util/IllegalFormatCodePointException.java	2019-08-27 17:28:59.450324386 -0700
+++ new/src/java.base/share/classes/java/util/IllegalFormatCodePointException.java	2019-08-27 17:28:59.254324386 -0700
@@ -38,6 +38,7 @@
  */
 public class IllegalFormatCodePointException extends IllegalFormatException {
 
+    @java.io.Serial
     private static final long serialVersionUID = 19080630L;
 
     private int c;