Here is my original problem:

> When I create a new group by copying a message into it, I can't
> select that group unless I do M-g (gnus-group-get-new-news-this-group).

> I use B c - gnus-summary-copy-article, and enter the name of a group
> that does not exist. When prompted, I confirm that I want to create
> it.

> gnus-read-move-group-name creates the group, and activates it. Of
> course, it is empty, and this is what (gnus-active <group-name>) will
> report from now on.

> When I subscribe the group in the Group buffer, and try to select it, the
> active info is never updated. So gnus believes that it is still empty,
> and refuses to enter it. "Can't select group".

I considered a few other solutions

1. Don't activate group when creating it.

2. Refresh active info of newly created groups in gnus-summary-move-article

3. Refresh active info when changing group level or selecting an
   ephemeral group.

2 seems to be most consistent with the current design - not that I
understand it well. Here is a patch. Is it OK?

It makes a separate list of copy destinations which do not have info,
and updates their active info.


*** /home/jk/pgnus-0.93/lisp/gnus-sum.el	Thu Jul  8 13:31:21 1999
--- /home/jk/pgnus-jk/lisp/gnus-sum.el	Thu Jul  8 13:31:21 1999
***************
*** 7185,7191 ****
  		 (crosspost "Crosspost" "Crossposting")))
  	(copy-buf (save-excursion
  		    (nnheader-set-temp-buffer " *copy article*")))
! 	art-group to-method new-xref article to-groups)
      (unless (assq action names)
        (error "Unknown action %s" action))
      ;; Read the newsgroup name.
--- 7185,7191 ----
  		 (crosspost "Crosspost" "Crossposting")))
  	(copy-buf (save-excursion
  		    (nnheader-set-temp-buffer " *copy article*")))
!  	art-group to-method new-xref article to-groups new-groups)
      (unless (assq action names)
        (error "Unknown action %s" action))
      ;; Read the newsgroup name.
***************
*** 7280,7290 ****
                 (to-group (gnus-info-group info))
  	       to-marks)
  	  ;; Update the group that has been moved to.
  	  (when (and info
  		     (memq action '(move copy)))
- 	    (unless (member to-group to-groups)
- 	      (push to-group to-groups))
- 
  	    (unless (memq article gnus-newsgroup-unreads)
  	      (push 'read to-marks)
  	      (gnus-info-set-read
--- 7280,7294 ----
                 (to-group (gnus-info-group info))
  	       to-marks)
  	  ;; Update the group that has been moved to.
+ 	  (when (memq action '(move copy))
+ 	    (if info
+ 		(unless (member to-group to-groups)
+ 		  (push to-group to-groups))
+ 	      (unless (member pto-group new-groups)
+ 		(push pto-group new-groups))))
+ 
  	  (when (and info
  		     (memq action '(move copy)))
  	    (unless (memq article gnus-newsgroup-unreads)
  	      (push 'read to-marks)
  	      (gnus-info-set-read
***************
*** 7361,7366 ****
--- 7365,7373 ----
  	(when (gnus-group-goto-group (car to-groups) t)
  	  (gnus-group-get-new-news-this-group 1 t))
  	(pop to-groups)))
+ 
+     (while new-groups		; Update active info
+ 	(gnus-activate-group (pop new-groups) nil nil to-method))
  
      (gnus-kill-buffer copy-buf)
      (gnus-summary-position-point)