--- old/src/java.base/share/classes/java/util/Arrays.java	2019-08-27 17:28:48.550324386 -0700
+++ new/src/java.base/share/classes/java/util/Arrays.java	2019-08-27 17:28:48.382324386 -0700
@@ -4337,6 +4337,7 @@
     private static class ArrayList<E> extends AbstractList<E>
         implements RandomAccess, java.io.Serializable
     {
+        @java.io.Serial
         private static final long serialVersionUID = -2764017481108945198L;
         private final E[] a;