src/java.base/share/classes/sun/net/www/protocol/http/BasicAuthentication.java

@@ -49,10 +49,11 @@
  */
 
 
 class BasicAuthentication extends AuthenticationInfo {
 
+    @java.io.Serial
     private static final long serialVersionUID = 100L;
 
     /** The authentication string for this host, port, and realm.  This is
         a simple BASE64 encoding of "login:password".    */
     final String auth;