Listing inactive groups not working?

[Justus-bulk@Piater.name]

Hi -

[Using Gnus v5.13 with Emacs 23.1.1 on Debian testing] 

I want to inactivate some groups by setting their level to 7, but I
still want them to be listed in the *Group* buffer with 'L'. However,
they do not appear, even though gnus-group-list-inactive-groups is t
(the default).

If the above indicates some misunderstanding on my part, please
interrupt me right here.

Otherwise I'll go on: In gnus-group-prepare-flat, I think the following
code is broken:

	(when (gnus-group-prepare-logic
	       group
	       (and unread		; This group might be unchecked
;;;; For inactive groups, unread is nil, so ...
		    (or (not (stringp regexp))
			(string-match regexp group))
		    (<= (setq clevel (gnus-info-level info)) level)
		    (>= clevel lowest)
		    (cond
		     ((functionp predicate)
		      (funcall predicate info))
		     (predicate t)	; We list all groups?
		     (t
		      (or
		       (if (eq unread t) ; Unactivated?
;;;; ... this condition is never reached:
			   gnus-group-list-inactive-groups
					; We list unactivated
			 (> unread 0))
					; We list groups with unread articles

I changed this code section into the following:

	(when (gnus-group-prepare-logic
	       group
	       (and (or unread gnus-group-list-inactive-groups)
		    (or (not (stringp regexp))
			(string-match regexp group))
		    (<= (setq clevel (gnus-info-level info)) level)
		    (>= clevel lowest)
		    (cond
		     ((functionp predicate)
		      (funcall predicate info))
		     (predicate t)	; We list all groups?
		     (t
		      (or
		       (and (integerp unread) (> unread 0))

On a limited amount of tests, this code behaves as I would expect.  Does
this make sense, or am I misunderstanding what this code is supposed to
do?

Perhaps the real problem is elsewhere: The original code appears to make
perfect sense if gnus-group-unread returns t for inactive groups, but
for me it does not - it returns nil.

Thanks,
Justus