--- old/src/java.base/share/classes/java/lang/CloneNotSupportedException.java	2019-08-27 17:27:07.758324386 -0700
+++ new/src/java.base/share/classes/java/lang/CloneNotSupportedException.java	2019-08-27 17:27:07.510324386 -0700
@@ -43,6 +43,7 @@
 
 public
 class CloneNotSupportedException extends Exception {
+    @java.io.Serial
     private static final long serialVersionUID = 5195511250079656443L;
 
     /**