From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.bugs Subject: bug#51776: revert-buffer causes spurious scrolling when the buffer is displayed in two windows. Date: Fri, 12 Nov 2021 04:16:16 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="22015"; mail-complaints-to="usenet@ciao.gmane.io" To: 51776@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Nov 12 05:17:12 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mlNzy-0005MR-DI for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 12 Nov 2021 05:17:10 +0100 Original-Received: from localhost ([::1]:54098 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mlNzw-0003Xr-Hc for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 11 Nov 2021 23:17:08 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:44912) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlNzq-0003XT-87 for bug-gnu-emacs@gnu.org; Thu, 11 Nov 2021 23:17:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:59537) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mlNzp-0003UM-VU for bug-gnu-emacs@gnu.org; Thu, 11 Nov 2021 23:17:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mlNzp-000771-LO for bug-gnu-emacs@gnu.org; Thu, 11 Nov 2021 23:17:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Alan Mackenzie Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 12 Nov 2021 04:17:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 51776 X-GNU-PR-Package: emacs Original-Received: via spool by 51776-submit@debbugs.gnu.org id=B51776.163669058527285 (code B ref 51776); Fri, 12 Nov 2021 04:17:01 +0000 Original-Received: (at 51776) by debbugs.gnu.org; 12 Nov 2021 04:16:25 +0000 Original-Received: from localhost ([127.0.0.1]:42850 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mlNzF-000761-MC for submit@debbugs.gnu.org; Thu, 11 Nov 2021 23:16:25 -0500 Original-Received: from colin.muc.de ([193.149.48.1]:20963 helo=mail.muc.de) by debbugs.gnu.org with smtp (Exim 4.84_2) (envelope-from ) id 1mlNzD-00075l-RL for 51776@debbugs.gnu.org; Thu, 11 Nov 2021 23:16:24 -0500 Original-Received: (qmail 3615 invoked by uid 3782); 12 Nov 2021 04:16:17 -0000 Original-Received: from acm.muc.de (p4fe15acc.dip0.t-ipconnect.de [79.225.90.204]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Fri, 12 Nov 2021 05:16:16 +0100 Original-Received: (qmail 5497 invoked by uid 1000); 12 Nov 2021 04:16:16 -0000 Content-Disposition: inline In-Reply-To: X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:219722 Archived-At: On Thu, Nov 11, 2021 at 21:21:49 +0000, Alan Mackenzie wrote: > Hello, Emacs. > In the master branch: > (i) emacs -Q > (ii) C-x C-f ..../doc/lispref/display.texi > (iii) C-x 2 ; to split the windows with a horizontal divider. > (iv) Move to the "top" window (if not already there) with C-x o. > (v) M-< ; to the beginning of the buffer > (vi) After the line "@Chapter Emacs Display", insert a new line > "@node Display2" > (vii) Move to the "bottom" window with C-x o. > (viii) M-> ; to the end of the buffer. > (ix) Type a new last line "@cindex Help!". > (x) M-x revert-buffer RET yes RET > The "bottom" window now spuriously scrolls to the top of the buffer. > This is a bug. Not only is it a bug, it's an old bug. It happens in all of Emacs 27.2, 26.3, 25.3, and 24.5. -- Alan Mackenzie (Nuremberg, Germany).