set-window-start moves point without scrolling

[Michael Heerdegen]

Hello,

this seems strange to me: in emacs -Q, eval this:

(progn
  (setq-default scroll-margin 2)
  (pop-to-buffer (get-buffer-create "test"))
  (insert "1\n2\n3")
  (goto-char 1)
  (set-window-start nil (window-start)))

Then, point in buffer "test" is at the beginning of line 3.  This
doesn't happen in Emacs 23, only in 24.  And it doesn't seem right - the
doc of `set-window-start' tells that point is only changed if would be
out of sight otherwise.  Is this a bug or a feature?


Regards,

Michael.