Re: Bug in `next-line' when last char in line has after-string property

[Ralf Angeli]

* Kim F. Storm (2007-01-05) writes:

> Everybody, please watch out for problems with line movement in buffers
> with overlay and text-property strings.

If you execute the following code which inserts a few strings into the
buffer *foo* and then puts three overlays in the buffer where each one
is covering a line break in the buffer and using a line break in the
display string, the line in the middle will be left out if one tries
to move point up using `C-p' several times.  Downwards with `C-n' is
okay.

This is not a regression, but also happened like this before your last
change.  It just caught my eye when checking for problems with the new
code.

(progn
  (pop-to-buffer (get-buffer-create "*foo*"))
  (dotimes (i 5)
    (insert (make-string 10 ?x) "\n"))
  (let ((ov (make-overlay 17 24)))
    (overlay-put ov 'display "aaa\n"))
  (let ((ov (make-overlay 29 35)))
    (overlay-put ov 'display "aaa\n"))
  (let ((ov (make-overlay 40 46)))
    (overlay-put ov 'display "aaa\n")))

-- 
Ralf