--- old/src/java.base/share/classes/java/util/PriorityQueue.java	2019-10-04 19:55:29.719147999 -0700
+++ new/src/java.base/share/classes/java/util/PriorityQueue.java	2019-10-04 19:55:29.507042000 -0700
@@ -111,6 +111,7 @@
      * The comparator, or null if priority queue uses elements'
      * natural ordering.
      */
+    @SuppressWarnings("serial") // Conditionally serializable
     private final Comparator<? super E> comparator;
 
     /**