bug#3668: 23.1.50; next-line and previous-line don't keep the column in text-scale-mode

bug#3668: 23.1.50; next-line and previous-line don't keep the column in text-scale-mode

[Teemu Likonen]

When text-scale-mode is active the functions C-n (next-line) and C-p
(previous-line) don't stay at the same column when they are executed the
first time after changing the column. Difficult to explain but here's a
simple way to reproduce:

 1. Start Emacs:

        emacs -Q

 2. Increase or decrease the font size with C-x C-- or C-x C-+
    (text-scale-adjust) so that it's different from the default size.

 3. Type this text in the *scratch* buffer at column 0:

        123
        456

 4. Move the point at the beginning of line "123".

 5. Use C-f to move the point between numbers 2 and 3.

 6. Use C-n to move to the next-line.

 7. The point should be between 5 and 6 but it is between 4 and 5.

 8. Fix the bug. :-)



in GNU Emacs 23.1.50.7 (i686-pc-linux-gnu, GTK+ Version 2.12.12)
 of 2009-06-24 on mithlond
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--prefix=/home/dtw/local''

bug#3668: 23.1.50; next-line and previous-line don't keep the column in text-scale-mode

[Teemu Likonen]

On 2009-06-24 11:03 (+0300), Teemu Likonen wrote:

> When text-scale-mode is active the functions C-n (next-line) and C-p
> (previous-line) don't stay at the same column when they are executed the
> first time after changing the column.

This bug appears only when variable line-move-visual=t.

bug#3668: 23.1.50; next-line and previous-line don't keep the column in text-scale-mode

[Lars Magne Ingebrigtsen]

Teemu Likonen <tlikonen@iki.fi> writes:

> On 2009-06-24 11:03 (+0300), Teemu Likonen wrote:
>
>> When text-scale-mode is active the functions C-n (next-line) and C-p
>> (previous-line) don't stay at the same column when they are executed the
>> first time after changing the column.
>
> This bug appears only when variable line-move-visual=t.

Is this bug still present in Emacs 24?  Something similar was recently
fixed, but I'm not sure whether it fixes this bug, too.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

bug#3668: 23.1.50; next-line and previous-line don't keep the column in text-scale-mode

[Eli Zaretskii]

> From: Lars Magne Ingebrigtsen <larsi@gnus.org>
> Date: Sat, 17 Sep 2011 08:21:16 +0200
> Cc: 3668@debbugs.gnu.org
> 
> Teemu Likonen <tlikonen@iki.fi> writes:
> 
> > On 2009-06-24 11:03 (+0300), Teemu Likonen wrote:
> >
> >> When text-scale-mode is active the functions C-n (next-line) and C-p
> >> (previous-line) don't stay at the same column when they are executed the
> >> first time after changing the column.
> >
> > This bug appears only when variable line-move-visual=t.
> 
> Is this bug still present in Emacs 24?  Something similar was recently
> fixed, but I'm not sure whether it fixes this bug, too.

Repeating the recipe in the original report, I can no longer reproduce
the bug: cursor winds up between 5 and 6, as expected.

bug#3668: 23.1.50; next-line and previous-line don't keep the column in text-scale-mode

[Lars Magne Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> Repeating the recipe in the original report, I can no longer reproduce
> the bug: cursor winds up between 5 and 6, as expected.

Ok; I'm closing this report.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/