coreutils 5.2.1 bug: id -Gn

[Bulgrien, Kevin]

Here is 5.2.1 behavior.  Please note the difference in output when id -Gn
is invoked with/without a user name.  Is this fixed in 5.3.0?  I do not
see a reference to "id" in the list of changes, but maybe I missed it.

id -Gn without a user name gives double output for most groups that a user
is a member of.

---

$ id --version
id (coreutils) 5.2.1
Written by Arnold Robbins and David MacKenzie.

Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ id -Gn
root adm adm wheel wheel news news apache apache cvs cvs cvsadm cvsadm
webadm webadm
$ whoami
blahblah
$ id -Gn blahblah
root adm wheel news apache cvs cvsadm webadm

---

For reference, please consider this correct behavior from an old version
that
is consistent in both cases when a user name is provided and when one is
not.

---

$ id --version
id (GNU sh-utils) 2.0.11
Written by Arnold Robbins and David MacKenzie.

Copyright (C) 2000 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ id -Gn
blahblah root news cvs cvsadmin webadmin backups
$ whoami
blahblah
$ id -Gn blahblah
blahblah root news cvs cvsadmin webadmin backups

--- 
Kevin R. Bulgrien
Product Engineer

General Dynamics C4 Systems                   http://www.tripointglobal.com/
VertexRSI
1915 Harrison Road                                    Tel: 903-295-1480 x288
Longview, TX 75604-5438                               Fax: 903-295-1479

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