From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#66764: 29.1; Emacs scrolls for "(goto-char (point-max))" instead of jumping Date: Thu, 26 Oct 2023 21:25:16 +0300 Message-ID: <83jzr9fdh0.fsf@gnu.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31444"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 66764@debbugs.gnu.org To: Geza Herman Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Oct 26 20:25:52 2023 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 1qw53H-00083N-Qp for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 26 Oct 2023 20:25:51 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qw530-00066T-1V; Thu, 26 Oct 2023 14:25:34 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qw52y-00064i-Db for bug-gnu-emacs@gnu.org; Thu, 26 Oct 2023 14:25:32 -0400 Original-Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qw52x-00021h-V7 for bug-gnu-emacs@gnu.org; Thu, 26 Oct 2023 14:25:32 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1qw53S-0007oY-GB for bug-gnu-emacs@gnu.org; Thu, 26 Oct 2023 14:26:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 26 Oct 2023 18:26:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 66764 X-GNU-PR-Package: emacs Original-Received: via spool by 66764-submit@debbugs.gnu.org id=B66764.169834476130031 (code B ref 66764); Thu, 26 Oct 2023 18:26:02 +0000 Original-Received: (at 66764) by debbugs.gnu.org; 26 Oct 2023 18:26:01 +0000 Original-Received: from localhost ([127.0.0.1]:34453 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qw53Q-0007oI-SM for submit@debbugs.gnu.org; Thu, 26 Oct 2023 14:26:01 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45700) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qw53N-0007o1-1F for 66764@debbugs.gnu.org; Thu, 26 Oct 2023 14:25:59 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qw52m-0001cU-Nu; Thu, 26 Oct 2023 14:25:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=upXkQJ/7XxviK9UXz1axAz8X8EenfhfSH/RYpcEn07w=; b=IBkWwaXAgrtZrCPZiR6+ XU8eQGfeCFA5bbpvxS22e1Xlh2PpmdbeRXojr0Ukb47aEfFXLOTtYjs4cck6ACv+zz99O3+xMbUcv lbNBwaWuXhK3p/mjHD//w39BuUvjomaAzLvKn/CGlfV6rsbzzmNjLAFqpZytH7SYyRljlo5IogM6v z+LtjDmRcU3NkPNloa0vADvEYJOao9lD4mj12wOUVyRh0fFjy1GDG1q5cAt6v6FqBXy+H0BlFvG+6 JmmDxKD5v8OBl6ez0af6e7VcJYRWvjj5dH+eYraZ2YtZNUUXaTqPxhsCWiFCwCA9rQTv3fFRFek7s BsypoyBRl7KyCw==; In-Reply-To: (message from Geza Herman on Thu, 26 Oct 2023 19:04:42 +0200) 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:273309 Archived-At: > Date: Thu, 26 Oct 2023 19:04:42 +0200 > From: Geza Herman > > The bug is, that in certain circumstances, emacs moves the point by > using some kind of scrolling for "(goto-char (point-max))", instead of > just jumping. > > Repro: > > - create a file using the little C program at the end (it produces a > large text to stdout, you'll need to redirect it to some file) > > - open the file with "emacs -Q generated.txt" > > - with M-:, execute this: > >    (progn >      (setq scroll-conservatively 101) >      (font-lock-add-keywords nil '(((lambda (bound)) (1 'error prepend > t))) t) >      (goto-char (point-max))) > > Notice that emacs doesn't jump to the end immediately as usual, but it > does some kind of very fast scrolling. I didn't yet try to reproduce this, but just reading the description: why do you consider this behavior a problem, let alone a bug? > In my real case, a much smaller file produces this problem. Also, Emacs > doesn't go to the end of the file, but stops somewhere in the middle (I > was unable to reproduce this issue with a simple configuration). This can legitimately happen if the last line has tall characters or you use line-spacing or something similar. Again, why is it a problem, as long as EOB is visible after that? > So to go to the end of the file I have to run "(goto-char > (point-max))" multiple times. Interestingly, "M->" works fine. But > if I remove the recenter call at the end of "end-of-buffer", it also > has this odd behavior. Which isn't surprising, since with the 'recenter' call removed, end-of-buffer is just (goto-char (point-max)).