GNU bug report logs - #48754
previous-line on large lines or images travels two lines sometimes

Previous Next

To reply to this bug, email your comments to 48754 AT debbugs.gnu.org.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Radon Rosborough <radon.neon <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: previous-line on large lines or images travels two lines sometimes
Date: Sun, 30 May 2021 14:54:34 -0700

[Message part 1 (text/plain, inline)]

I've encountered some puzzling behavior related to
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=48170.

Specifically, running under emacs -Q commit
d6dc66053d846b6fc041889b4d0f383c8dac4da3 of 2021-05-30 on GNOME, if I load
up https://github.com/raxod502/bug48170-repro, then `next-line' navigates 1
line down, but `previous-line' navigates 2 lines up!

Any ideas about what might be causing that?

Best,
Radon

[Message part 2 (text/html, inline)]

Message #8 received at 48754 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Radon Rosborough <radon.neon <at> gmail.com>
Cc: 48754 <at> debbugs.gnu.org
Subject: Re: bug#48754: previous-line on large lines or images travels two
 lines sometimes
Date: Mon, 31 May 2021 18:26:27 +0300

> From: Radon Rosborough <radon.neon <at> gmail.com>
> Date: Sun, 30 May 2021 14:54:34 -0700
> 
> I've encountered some puzzling behavior related to https://debbugs.gnu.org/cgi/bugreport.cgi?bug=48170.
> 
> Specifically, running under emacs -Q commit d6dc66053d846b6fc041889b4d0f383c8dac4da3 of
> 2021-05-30 on GNOME, if I load up https://github.com/raxod502/bug48170-repro, then `next-line' navigates 1
> line down, but `previous-line' navigates 2 lines up!

I cannot reproduce this.  With the current master, both C-n and C-p
move by one screen line.

P.S. I only downloaded code.el, and it seems identical to the one in
the previous bug.  the images seem also identical, so I reused the
images from the previous bug.  Did any of them change?  Judging by the
time stamps, they didn't.

Message #11 received at 48754 <at> debbugs.gnu.org (full text, mbox):

From: Radon Rosborough <radon.neon <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 48754 <at> debbugs.gnu.org
Subject: Re: bug#48754: previous-line on large lines or images travels two
 lines sometimes
Date: Sat, 5 Jun 2021 12:43:11 -0700

[Message part 1 (text/plain, inline)]

I've found that this problem appears to depend on the window size. With the
default window size, everything works as expected. But, when I maximize the
window to fill my screen, C-p moves two lines up. Does that happen for you?
If not, I can experiment to find more precise conditions.

code.el is the same as the previous report, yes.

[Message part 2 (text/html, inline)]

Message #14 received at 48754 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Radon Rosborough <radon.neon <at> gmail.com>, 48754 <at> debbugs.gnu.org
Subject: Re: bug#48754: previous-line on large lines or images travels two
 lines sometimes
Date: Sun, 24 Oct 2021 00:27:26 -0700

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Radon Rosborough <radon.neon <at> gmail.com>
>> Date: Sun, 30 May 2021 14:54:34 -0700
>>
>> I've encountered some puzzling behavior related to https://debbugs.gnu.org/cgi/bugreport.cgi?bug=48170.
>>
>> Specifically, running under emacs -Q commit d6dc66053d846b6fc041889b4d0f383c8dac4da3 of
>> 2021-05-30 on GNOME, if I load up https://github.com/raxod502/bug48170-repro, then `next-line' navigates 1
>> line down, but `previous-line' navigates 2 lines up!
>
> I cannot reproduce this.  With the current master, both C-n and C-p
> move by one screen line.

I can reproduce this bug on current master.

Here's the git clone command for the sake of convenience:

    git clone https://github.com/raxod502/bug48170-repro.git

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.