--- old/src/java.base/share/classes/sun/net/www/protocol/http/BasicAuthentication.java	2019-08-27 17:29:33.250324386 -0700
+++ new/src/java.base/share/classes/sun/net/www/protocol/http/BasicAuthentication.java	2019-08-27 17:29:33.062324386 -0700
@@ -51,6 +51,7 @@
 
 class BasicAuthentication extends AuthenticationInfo {
 
+    @java.io.Serial
     private static final long serialVersionUID = 100L;
 
     /** The authentication string for this host, port, and realm.  This is