GNU bug report logs - #1810
23.0.60; visual-line-mode moves to the wrong column

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Juri Linkov <juri <at> jurta.org>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; visual-line-mode moves to the wrong column
Date: Tue, 06 Jan 2009 19:45:07 +0200

When `line-move-visual' is non-nil, moving down from a control character
moves to the wrong column.

Test case:

1. insert to a new buffer the following text:

^@est.
Test2.
Test3.

where ^@ at the beginning of the buffer is a NULL control character.

2. Move to the beginning of the buffer (M-<).

3. Move down (C-n) - point jumps from the *first* column of the first line
to the *second* column of the second line.

This behavior can be traced back to the function `posn-at-point'
that returns the x-coordinate of the second character in the displayed
control sequence "^@" instead of the first character where point
is actually located.

-- 
Juri Linkov
http://www.jurta.org/emacs/

Message #10 received at 1810-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Juri Linkov <juri <at> jurta.org>
Cc: 1810-done <at> debbugs.gnu.org
Subject: Re: 23.0.60; visual-line-mode moves to the wrong column
Date: Sat, 10 Jan 2009 13:42:40 -0500

> When `line-move-visual' is non-nil, moving down from a control character
> moves to the wrong column.
>
> This behavior can be traced back to the function `posn-at-point' that
> returns the x-coordinate of the second character in the displayed
> control sequence "^@" instead of the first character where point is
> actually located.

I've checked in a fix.  Thanks.

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