--- old/src/java.base/share/classes/java/time/chrono/ThaiBuddhistChronology.java	2019-08-27 17:28:43.278324386 -0700
+++ new/src/java.base/share/classes/java/time/chrono/ThaiBuddhistChronology.java	2019-08-27 17:28:43.086324386 -0700
@@ -116,6 +116,7 @@
     /**
      * Serialization version.
      */
+    @java.io.Serial
     private static final long serialVersionUID = 2775954514031616474L;
     /**
      * Containing the offset to add to the ISO year.
@@ -384,6 +385,7 @@
      * @return the instance of {@code Ser}, not null
      */
     @Override
+    @java.io.Serial
     Object writeReplace() {
         return super.writeReplace();
     }
@@ -394,6 +396,7 @@
      * @param s the stream to read
      * @throws InvalidObjectException always
      */
+    @java.io.Serial
     private void readObject(ObjectInputStream s) throws InvalidObjectException {
         throw new InvalidObjectException("Deserialization via serialization delegate");
     }