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#21523: 25.0.50; Undo with active region adds extra text Date: Mon, 16 Aug 2021 19:30:37 +0300 Message-ID: <831r6t8i8i.fsf@gnu.org> References: <48592862-1630-4c61-aeed-1e3b720824de@default> <87czqdd0ng.fsf@gnus.org> <83eeat8rd5.fsf@gnu.org> <874kbpa424.fsf@gnus.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21701"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 21523@debbugs.gnu.org To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Aug 16 18:31:13 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 1mFfW4-0005Qb-S9 for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 16 Aug 2021 18:31:12 +0200 Original-Received: from localhost ([::1]:48298 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mFfW3-0006eq-Ld for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 16 Aug 2021 12:31:11 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35000) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mFfVv-0006ei-J0 for bug-gnu-emacs@gnu.org; Mon, 16 Aug 2021 12:31:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:39277) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mFfVu-0008Jo-KE for bug-gnu-emacs@gnu.org; Mon, 16 Aug 2021 12:31:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mFfVu-0008WQ-9R for bug-gnu-emacs@gnu.org; Mon, 16 Aug 2021 12:31:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 16 Aug 2021 16:31:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 21523 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: confirmed Original-Received: via spool by 21523-submit@debbugs.gnu.org id=B21523.162913145532742 (code B ref 21523); Mon, 16 Aug 2021 16:31:02 +0000 Original-Received: (at 21523) by debbugs.gnu.org; 16 Aug 2021 16:30:55 +0000 Original-Received: from localhost ([127.0.0.1]:50823 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mFfVn-0008W2-FB for submit@debbugs.gnu.org; Mon, 16 Aug 2021 12:30:55 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:46722) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mFfVl-0008Vn-F2 for 21523@debbugs.gnu.org; Mon, 16 Aug 2021 12:30:54 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:53574) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mFfVf-0008Bb-Ek; Mon, 16 Aug 2021 12:30:47 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:3680 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mFfVb-0001qr-Tx; Mon, 16 Aug 2021 12:30:47 -0400 In-Reply-To: <874kbpa424.fsf@gnus.org> (message from Lars Ingebrigtsen on Mon, 16 Aug 2021 15:53:55 +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" Xref: news.gmane.io gmane.emacs.bugs:212043 Archived-At: > From: Lars Ingebrigtsen > Cc: drew.adams@oracle.com, 21523@debbugs.gnu.org > Date: Mon, 16 Aug 2021 15:53:55 +0200 > > Eli Zaretskii writes: > > >> This bug is still present in Emacs 28. > > > > Why is it a bug? What is the expected "non-buggy" behavior in this > > case? > > I'd expect it to either do nothing (since we're undoing in a region, and > the changed text is outside the region), or change the "This" to > "this". Leaving "Thisthis" in the buffer has to be a bug no matter how > you look at it. Is signaling an error okay? Because then it looks like an off-by-one error somewhere -- the following slightly modified recipe works as expected: emacs -Q C-u 23 M-g c ; go to "text" M-c C-f ; the crucial difference! C-SPC C-e C-/ => user-error: No further undo information for region So the problem seems to be that in the original recipe the region starts immediately after the end of the modified portion of text.