Re: set-window-start

[Lars Hansen <larsh@math.ku.dk>]

Luc Teirlinck wrote:
> There has been an undocumented change in the behavior of
> `set-window-start' since Emacs 20.7.

Recently I also noticed that something is wrong with window positions.
I noticed that when I evaluate

(let* ((edges (window-edges (selected-window)))
        (left (nth 0 edges))
        (top (nth 1 edges))
        (right (nth 2 edges))
        (bottom (nth 3 edges)))
   (list (window-at left top)
         (window-at right top)
         (window-at left bottom)
         (window-at right bottom)))

in the scratch buffer, it returns:

On Emacs 20.7:
(#<window 3 on *scratch*> nil #<window 4 on  *Minibuf-0*> nil)

On Emacs 21.2:
(#<window 3 on *scratch*> nil #<window 3 on *scratch*> nil)

On todays CVS Emacs:
(nil nil nil #<window 3 on *scratch*>)

As a result of the current state, windmove functions does not work 
correctly.