GNU bug report logs - #3020
23.0.92; `previous-line' sometimes fails with overlays

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Chong Yidong <cyd <at> stupidchicken.com>
Subject: bug#3020: marked as done (23.0.92; `previous-line' sometimes 
 fails with overlays)
Date: Sat, 25 Apr 2009 15:35:04 +0000

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Your message dated Sat, 25 Apr 2009 11:29:21 -0400
with message-id <87y6to21m6.fsf <at> cyd.mit.edu>
and subject line Re: 23.0.92; `previous-line' sometimes fails with overlays
has caused the Emacs bug report #3020,
regarding 23.0.92; `previous-line' sometimes fails with overlays
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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-- 
3020: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3020
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Markus Triska <markus.triska <at> gmx.at>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.92; `previous-line' sometimes fails with overlays
Date: Thu, 16 Apr 2009 20:34:23 +0200

When I evaluate the following form in "emacs -Q":

   (progn
     (switch-to-buffer (get-buffer-create "test"))
     (insert "the first line\na ")
     (let ((o (make-overlay (point) (point))))
       (overlay-put
        o 'after-string
        (propertize (concat "very very very very very very very very "
                            "very very very very very very very very "
                            "long line") 'face '(:background "cyan"))))
     (insert "\nand the last line")
     (previous-line))

and then press C-p, point unexpectedly fails to move. However, when I
then press C-a C-n C-p C-p, the second C-p works as expected.


In GNU Emacs 23.0.92.1 (i386-apple-darwin9.6.1, GTK+ Version 2.14.7)
 of 2009-04-16 on mt-imac.local
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

[Message part 3 (message/rfc822, inline)]

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 3020-done <at> debbugs.gnu.org,
        Stephen Berman <stephen.berman <at> gmx.net>
Subject: Re: 23.0.92; `previous-line' sometimes fails with overlays
Date: Sat, 25 Apr 2009 11:29:21 -0400

> point unexpectedly fails to move. However, when I then press C-a C-n
> C-p C-p, the second C-p works as expected.

I've checked in a fix.  Thanks for noticing the problem.

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