GNU logs - #32060, boring messages

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#32060: Horizontal Scrolling (Current Line):  Wrong line gets h-scrolled.
Resent-From: Keith David Bershatsky <esq@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-gnu-emacs@HIDDEN
Resent-Date: Thu, 05 Jul 2018 15:31:01 +0000
Resent-Message-ID: <handler.32060.B.153080463926374 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: 32060 <at> debbugs.gnu.org
Date: Thu, 05 Jul 2018 08:30:05 -0700
Message-ID: <m2va9tem4i.wl%esq@HIDDEN>
From: Keith David Bershatsky <esq@HIDDEN>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Precedence: list
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>

With a few long lines (of different lengths) in a scratch buffer in Emacs master branch (freshly built), it is possible to visually observe that the wrong line gets horizontally scrolled instead of the current line.

Step 1:  Build a new Emacs from the master branch.

Step 2:  In a scratch buffer, paste the following long lines:

Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.
Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis.
Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis.
Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis.
Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.

Step 3:  Evaluate the following:

(progn
  (fundamental-mode)
  (setq-local auto-hscroll-mode 'current-line)
  (scroll-left 10 t))

Step 4:  Place the cursor at the very end of the buffer; i.e., at the very end of the last long line of text.  Make sure that it gets horizontally scrolled.

Step 5:  Press the arrow key up one (1) time.

Step 6:  Press M-Left one (1) time.  The cursor should now be on the second to the last line in the buffer, at the beginning of the word "lobortis."

Step 7:  Now press the arrow keys up or down and watch as the wrong line gets horizontally scrolled.  The line that was last visited before moving up/down is the line that gets horizontally scrolled instead of the current line.

Message sent:

Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Mailer: MIME-tools 5.505 (Entity 5.505)
Content-Type: text/plain; charset=utf-8
X-Loop: help-debbugs@HIDDEN
From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Keith David Bershatsky <esq@HIDDEN>
Subject: bug#32060: Acknowledgement (Horizontal Scrolling (Current Line): 
 Wrong line gets h-scrolled.)
Message-ID: <handler.32060.B.153080463926374.ack <at> debbugs.gnu.org>
References: <m2va9tem4i.wl%esq@HIDDEN>
X-Gnu-PR-Message: ack 32060
X-Gnu-PR-Package: emacs
Reply-To: 32060 <at> debbugs.gnu.org
Date: Thu, 05 Jul 2018 15:31:02 +0000

Thank you for filing a new bug report with debbugs.gnu.org.

This is an automatically generated reply to let you know your message
has been received.

Your message is being forwarded to the package maintainers and other
interested parties for their attention; they will reply in due course.

Your message has been sent to the package maintainer(s):
 bug-gnu-emacs@HIDDEN

If you wish to submit further information on this problem, please
send it to 32060 <at> debbugs.gnu.org.

Please do not send mail to help-debbugs@HIDDEN unless you wish
to report a problem with the Bug-tracking system.

--=20
32060: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D32060
GNU Bug Tracking System
Contact help-debbugs@HIDDEN with problems

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#32060: Horizontal Scrolling (Current Line):  Wrong line gets h-scrolled.
Resent-From: Lars Ingebrigtsen <larsi@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-gnu-emacs@HIDDEN
Resent-Date: Thu, 26 Nov 2020 13:25:01 +0000
Resent-Message-ID: <handler.32060.B32060.16063970431403 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: Keith David Bershatsky <esq@HIDDEN>
Cc: 32060 <at> debbugs.gnu.org
From: Lars Ingebrigtsen <larsi@HIDDEN>
References: <m2va9tem4i.wl%esq@HIDDEN>
Date: Thu, 26 Nov 2020 14:23:48 +0100
In-Reply-To: <m2va9tem4i.wl%esq@HIDDEN> (Keith David Bershatsky's message
 of "Thu, 05 Jul 2018 08:30:05 -0700")
Message-ID: <87r1ogqmjf.fsf@HIDDEN>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain
Precedence: list
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>

Keith David Bershatsky <esq@HIDDEN> writes:

> Step 4:  Place the cursor at the very end of the buffer; i.e., at the very end of the last long line of text.  Make sure that it gets horizontally scrolled.
>
> Step 5:  Press the arrow key up one (1) time.
>
> Step 6:  Press M-Left one (1) time.  The cursor should now be on the second to the last line in the buffer, at the beginning of the word "lobortis."
>
> Step 7:  Now press the arrow keys up or down and watch as the wrong line gets horizontally scrolled.  The line that was last visited before moving up/down is the line that gets horizontally scrolled instead of the current line.

(This bug report unfortunately got no response at the time.)

I was able to reproduce this in Emacs 26, but in Emacs 28 it behaves
slightly different -- it's still wrong, but not quite in the same way.
That is, it only begins scrolling lines (the wrong lines) after moving a
bit a bit more.

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

Message received at control <at> debbugs.gnu.org:

Received: (at control) by debbugs.gnu.org; 26 Nov 2020 13:24:07 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Thu Nov 26 08:24:07 2020
Received: from localhost ([127.0.0.1]:40161 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1kiHFm-0000Mp-QU
	for submit <at> debbugs.gnu.org; Thu, 26 Nov 2020 08:24:07 -0500
Received: from quimby.gnus.org ([95.216.78.240]:50398)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <larsi@HIDDEN>) id 1kiHFl-0000M7-Lg
 for control <at> debbugs.gnu.org; Thu, 26 Nov 2020 08:24:06 -0500
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org;
 s=20200322; h=Subject:From:To:Message-Id:Date:Sender:Reply-To:Cc:
 MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID:
 Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc
 :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:
 List-Subscribe:List-Post:List-Owner:List-Archive;
 bh=+oRNSeOjQxUYLJfqsmH+8MhUxvVAi4kc268yIFU8MXQ=; b=Pzbbh6ilOUMntzKfbQ3KPfdIcb
 KHiXXFyHbNbWUqAysSP3oEq8+3lFEFjZcCcHOV4VexDHNopad17hNtOmu1eFrgf0N5ast8vBPyc88
 m/5l+ACRTEq2O+8bR0gCYpC3yFAZkwsfsJXSNrTRd2oYMvEjGNEiwJG008UJ6nRA3TGY=;
Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo)
 by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1kiHFd-0001uS-VS
 for control <at> debbugs.gnu.org; Thu, 26 Nov 2020 14:24:00 +0100
Date: Thu, 26 Nov 2020 14:23:56 +0100
Message-Id: <87pn40qmj7.fsf@HIDDEN>
To: control <at> debbugs.gnu.org
From: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: control message for bug #32060
X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org",
 has NOT identified this incoming email as spam.  The original
 message has been attached to this so you can view it or label
 similar future email.  If you have any questions, see
 @@CONTACT_ADDRESS@@ for details.
 Content preview:  tags 32060 + confirmed quit 
 Content analysis details:   (-2.9 points, 5.0 required)
 pts rule name              description
 ---- ---------------------- --------------------------------------------------
 -1.0 ALL_TRUSTED            Passed through trusted hosts only via SMTP
 -1.9 BAYES_00               BODY: Bayes spam probability is 0 to 1%
 [score: 0.0000]
X-Spam-Score: 0.0 (/)
X-Debbugs-Envelope-To: control
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -1.0 (-)

tags 32060 + confirmed
quit

Last modified: Thu, 26 Nov 2020 13:30:02 UTC

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