src/java.base/share/classes/java/nio/file/attribute/UserPrincipalNotFoundException.java

*** 35,44 ****
--- 35,45 ----
   */
  
  public class UserPrincipalNotFoundException
      extends IOException
  {
+     @java.io.Serial
      static final long serialVersionUID = -5369283889045833024L;
  
      private final String name;
  
      /**