--- a/src/java.base/share/classes/java/util/Collections.java	Fri Jul 12 08:40:37 2019 -0700
+++ b/src/java.base/share/classes/java/util/Collections.java	Wed Jan 23 14:45:54 2019 -0800
@@ -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
@@ -26,6 +26,7 @@
 package java.util;
 
 import java.io.IOException;
+import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.io.Serializable;
 import java.lang.reflect.Array;
@@ -39,6 +40,7 @@
 import java.util.stream.IntStream;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
+import jdk.internal.access.SharedSecrets;
 
 /**
  * This class consists exclusively of static methods that operate on or return
@@ -5163,6 +5165,11 @@
         public Spliterator<E> spliterator() {
             return stream().spliterator();
         }
+
+        private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
+            ois.defaultReadObject();
+            SharedSecrets.getJavaObjectInputStreamAccess().checkArray(ois, Object[].class, n);
+        }
     }
 
     /**