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bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + g
From: |
Stephen Berman |
Subject: |
bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug |
Date: |
Wed, 07 Oct 2020 22:54:51 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
On Wed, 07 Oct 2020 10:08:23 +0300 Eli Zaretskii <eliz@gnu.org> wrote:
>> From: Stephen Berman <stephen.berman@gmx.net>
>> Cc: 43835@debbugs.gnu.org
>> Date: Tue, 06 Oct 2020 22:05:42 +0200
>>
>> > Thanks, but having Gnus in the picture is too much. Debugging
>> > redisplay issues involved in these momentary movements is hard as it
>> > is already.
>>
>> I believe you, and I wish I could remove Gnus from the recipe
>
> An alternative would be to figure out what display-related changes
> made by Gnus in that buffer affect this. Then we could use those
> settings outside of Gnus to reproduce the issue.
I figured it out and you may be surprised. Here's the new recipe:
0. emacs -Q
1. Evaluate the following sexp:
(let ((buf (get-buffer-create "*test*")))
(with-current-buffer buf
(setq auto-hscroll-mode 'current-line
truncate-lines t
bidi-paragraph-direction 'left-to-right)
(insert "Subject: Re: bug#39280: 27.0.60; wdired-get-filename ignores first
argument (this is a test)\n")
(goto-char (point-min)))
(show-paren-mode)
(switch-to-buffer buf))
2. Now typing `C-e' shows the problem.
The settings of truncate-lines and bidi-paragraph-direction come from
gnus-summary-mode, the newline at the end of the inserted text is also
essential (I think I had omitted that when I though I couldn't replicate
the problem in another buffer).
Do you still want the output of trace-redisplay?
Steve Berman
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Stephen Berman, 2020/10/06
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Eli Zaretskii, 2020/10/07
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug,
Stephen Berman <=
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Eli Zaretskii, 2020/10/08
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Stephen Berman, 2020/10/08
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Eli Zaretskii, 2020/10/08
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Stephen Berman, 2020/10/08
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Eli Zaretskii, 2020/10/08
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Stephen Berman, 2020/10/08
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Eli Zaretskii, 2020/10/08
- bug#43835: 28.0.50; auto-hscroll-mode/current-line + show-paren-mode + gnus-summary-mode = bug, Eli Zaretskii, 2020/10/08