--- a/src/java.base/share/classes/java/util/LinkedList.java	Thu Aug 29 18:52:30 2019 -0400
+++ b/src/java.base/share/classes/java/util/LinkedList.java	Thu Aug 29 16:31:34 2019 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1112,6 +1112,7 @@
         return a;
     }
 
+    @java.io.Serial
     private static final long serialVersionUID = 876323262645176354L;
 
     /**
@@ -1122,6 +1123,7 @@
      *             contains) is emitted (int), followed by all of its
      *             elements (each an Object) in the proper order.
      */
+    @java.io.Serial
     private void writeObject(java.io.ObjectOutputStream s)
         throws java.io.IOException {
         // Write out any hidden serialization magic
@@ -1140,6 +1142,7 @@
      * (that is, deserializes it).
      */
     @SuppressWarnings("unchecked")
+    @java.io.Serial
     private void readObject(java.io.ObjectInputStream s)
         throws java.io.IOException, ClassNotFoundException {
         // Read in any hidden serialization magic