bug#33532: 26.1; set-window-configuration does not restore display start

[martin rudalics <rudalics@gmx.at>]

 > These functions have an analogous issue, which you can see with:
 >
 >      (let ((buf (get-buffer-create "buf")))
 >        (switch-to-buffer buf)
 >        (erase-buffer)
 >        (dotimes (x 10)
 >          (insert (format "x is %s\n" x)))
 >        (recenter 3)
 >        (sit-for 1)
 >        (let ((conf (window-state-get))
 >              (ws (window-start))
 >              (str (with-current-buffer buf (buffer-string))))
 >          (with-current-buffer buf
 >            (erase-buffer)
 >            (insert str))
 >          (window-state-put conf)
 >          (sit-for 1)
 >          (message "window-start: %s vs. %s" ws (window-start))))

You have to call 'window-state-get' with the WRITABLE argument
non-nil, like (window-state-get nil t).  Otherwise, it gets you
markers just like 'current-window-configuration'.

Note that I did not disregard the remainder of your mail but please
let's continue the discussion after you tried my suggestion.

Thanks, martin