--- old/src/java.base/share/classes/java/time/DateTimeException.java	2019-08-27 17:28:26.478324386 -0700
+++ new/src/java.base/share/classes/java/time/DateTimeException.java	2019-08-27 17:28:26.302324386 -0700
@@ -77,6 +77,7 @@
     /**
      * Serialization version.
      */
+    @java.io.Serial
     private static final long serialVersionUID = -1632418723876261839L;
 
     /**