--- old/src/java.base/share/classes/java/lang/ClassCircularityError.java	2019-08-27 17:27:05.694324386 -0700
+++ new/src/java.base/share/classes/java/lang/ClassCircularityError.java	2019-08-27 17:27:05.506324386 -0700
@@ -33,6 +33,7 @@
  * @since      1.0
  */
 public class ClassCircularityError extends LinkageError {
+    @java.io.Serial
     private static final long serialVersionUID = 1054362542914539689L;
 
     /**