Point stuck with adjacent overlays and invisibility spec

[Ralf Angeli]

Evaluating the following form will create two adjacent overlays and
point will be stuck at the top of the buffer (at least visually; there
still is feedback, e.g. beeping, if you hold `C-n' long enough and hit
the bottom of the buffer).

(progn
  (pop-to-buffer (get-buffer-create "*foo*"))
  (insert "text\ntext\ntext\ntext\n")
  (goto-char (point-min))
  (add-to-invisibility-spec '(outline . t))
  (let ((ov (make-overlay (line-beginning-position 2)
                          (line-beginning-position 3))))
    (overlay-put ov 'display "xxx"))
  (let ((ov (make-overlay (line-beginning-position 3)
                          (line-end-position 3))))
    (overlay-put ov 'invisible 'outline)))

Such a constellation of overlays may occur if the folding feature of
AUCTeX is used in conjunction with Outline Minor mode.

Point does not get stuck in Emacs 21.4.

-- 
Ralf