--- a/src/jdk.security.auth/share/classes/com/sun/security/auth/module/UnixSystem.java	Wed Sep 25 14:48:39 2019 +0530
+++ b/src/jdk.security.auth/share/classes/com/sun/security/auth/module/UnixSystem.java	Wed Sep 25 17:54:21 2019 +0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -33,6 +33,7 @@
 
     private native void getUnixInfo();
 
+    // Warning: the following 4 fields are used by Unix.c
     protected String username;
     protected long uid;
     protected long gid;