Lars Ingebrigtsen <larsi@HIDDEN>
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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text
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Content preview: Lars Ingebrigtsen <larsi@HIDDEN> writes: > Actually, the
problem seems to be in undo-adjust-elt, which was > rewritten in 2014 to
fix bug#17235. > > I've now added a test case (commented out), but I don't
quite understand > the logic in undo [...]
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Lars Ingebrigtsen <larsi@HIDDEN> writes:
> Actually, the problem seems to be in undo-adjust-elt, which was
> rewritten in 2014 to fix bug#17235.
>
> I've now added a test case (commented out), but I don't quite understand
> the logic in undo-adjust-elt... anybody see something obviously wrong?
(defun undo-adjust-elt (elt deltas)
[...]
;; (TEXT . POSITION)
(`(,(and text (pred stringp)) . ,(and pos (pred integerp)))
(cons text (* (if (< pos 0) -1 1)
(undo-adjust-pos (abs pos) deltas))))
The problem seems to be here. In my test case, this make the ("This"
. 1) entry into a ("This" . 5) entry, which is then included in the
region. Using < instead if <= works for this particular test case, but
not for undo-test-region-eob.
I've added Barry to the CCs; perhaps he has some insights here.
For reference, this is the test case:
(ert-deftest test-undo-region ()
(with-temp-buffer
(insert "This is a test\n")
(goto-char (point-min))
(setq buffer-undo-list nil)
(downcase-word 1)
(should (= (length (delq nil (undo-make-selective-list 1 9))) 2))
;; FIXME: These should give 0, but currently give 1.
;;(should (= (length (delq nil (undo-make-selective-list 4 9))) 0))
;;(should (= (length (delq nil (undo-make-selective-list 5 9))) 0))
(should (= (length (delq nil (undo-make-selective-list 6 9))) 0))))
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
Full text available.Received: (at 21523) by debbugs.gnu.org; 18 Aug 2021 13:31:55 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Aug 18 09:31:55 2021 Received: from localhost ([127.0.0.1]:55257 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1mGLff-0006aY-3u for submit <at> debbugs.gnu.org; Wed, 18 Aug 2021 09:31:55 -0400 Received: from quimby.gnus.org ([95.216.78.240]:38228) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1mGLfa-0006aJ-T8 for 21523 <at> debbugs.gnu.org; Wed, 18 Aug 2021 09:31:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=11dV7esFL5MCW0Fdfls12W/zdXeZRTmzNPkZ3TjrsDQ=; b=ah8na6z6HlrotoZvIOHgda3xei 5ssW8WKSixlOQWwBybF6LIx9AcHc1VvOSI5ZZvUvkQPfglDM0aODA9Kp7eK/pudl8HGehUvk3jWFS /NqPlaHSoJCd/Kx4Rgp8h4KnnMWvz3Oas0JzARddFLCb6k8wESEz6Osk5ukat6eUGzzE=; Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1mGLfN-0000OI-L4; Wed, 18 Aug 2021 15:31:41 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text References: <48592862-1630-4c61-aeed-1e3b720824de@default> <87czqdd0ng.fsf@HIDDEN> <83eeat8rd5.fsf@HIDDEN> <874kbpa424.fsf@HIDDEN> <831r6t8i8i.fsf@HIDDEN> Date: Wed, 18 Aug 2021 15:31:36 +0200 In-Reply-To: <831r6t8i8i.fsf@HIDDEN> (Eli Zaretskii's message of "Mon, 16 Aug 2021 19:30:37 +0300") Message-ID: <878s0ydglj.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain 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: Eli Zaretskii <eliz@HIDDEN> writes: > Is signaling an error okay? Yup. 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: -2.3 (--) X-Debbugs-Envelope-To: 21523 Cc: 21523 <at> debbugs.gnu.org, drew.adams@HIDDEN 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: -3.3 (---) Eli Zaretskii <eliz@HIDDEN> writes: > Is signaling an error okay? Yup. > 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. Yup; I'm seeing the same thing, so this does indeed look like a off-by-one error. And... it's in `undo-elt-in-region', I think, called by (basically) (undo-make-selective-list (mark) (point)). There's basically no test cases for this function, I think? Actually, the problem seems to be in undo-adjust-elt, which was rewritten in 2014 to fix bug#17235. I've now added a test case (commented out), but I don't quite understand the logic in undo-adjust-elt... anybody see something obviously wrong? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
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Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text
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> From: Lars Ingebrigtsen <larsi@HIDDEN>
> Cc: drew.adams@HIDDEN, 21523 <at> debbugs.gnu.org
> Date: Mon, 16 Aug 2021 15:53:55 +0200
>
> Eli Zaretskii <eliz@HIDDEN> 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.
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
Full text available.Received: (at 21523) by debbugs.gnu.org; 16 Aug 2021 13:54:08 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Aug 16 09:54:08 2021 Received: from localhost ([127.0.0.1]:49040 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1mFd44-00040C-Jl for submit <at> debbugs.gnu.org; Mon, 16 Aug 2021 09:54:08 -0400 Received: from quimby.gnus.org ([95.216.78.240]:44596) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1mFd42-0003zj-T4 for 21523 <at> debbugs.gnu.org; Mon, 16 Aug 2021 09:54:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=2GxERbnD9fQPEHt/scA0ZOWWweafW47iFGNNzb38l7I=; b=H3t9i1bxYqAvG2teuJnlS40HWD 4xb5sTPypp/UGUMCIY2mQ4hbCGS6JDZZnX78quN2k4RqiPl8YuT9RPc3xG1MoL7JO4BYClwDxbzJH eh+4fq48TDr65m5rri3O//i1Uh5QgGiYSwNX/CU0nV9p7hOjAUlYL41b13N2QMrz2ruc=; Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1mFd3r-0005TQ-Vh; Mon, 16 Aug 2021 15:54:00 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text References: <48592862-1630-4c61-aeed-1e3b720824de@default> <87czqdd0ng.fsf@HIDDEN> <83eeat8rd5.fsf@HIDDEN> Date: Mon, 16 Aug 2021 15:53:55 +0200 In-Reply-To: <83eeat8rd5.fsf@HIDDEN> (Eli Zaretskii's message of "Mon, 16 Aug 2021 16:13:26 +0300") Message-ID: <874kbpa424.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain 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: Eli Zaretskii <eliz@HIDDEN> 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 ma [...] 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: -2.3 (--) X-Debbugs-Envelope-To: 21523 Cc: 21523 <at> debbugs.gnu.org, drew.adams@HIDDEN 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: -3.3 (---) Eli Zaretskii <eliz@HIDDEN> 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. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
Full text available.Received: (at 21523) by debbugs.gnu.org; 16 Aug 2021 13:13:46 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Aug 16 09:13:46 2021 Received: from localhost ([127.0.0.1]:48967 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1mFcQw-0004yX-I4 for submit <at> debbugs.gnu.org; Mon, 16 Aug 2021 09:13:46 -0400 Received: from eggs.gnu.org ([209.51.188.92]:58000) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1mFcQr-0004yI-53 for 21523 <at> debbugs.gnu.org; Mon, 16 Aug 2021 09:13:41 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:47544) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1mFcQl-0007t9-FF; Mon, 16 Aug 2021 09:13:31 -0400 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:3516 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1mFcQl-0003uk-1y; Mon, 16 Aug 2021 09:13:31 -0400 Date: Mon, 16 Aug 2021 16:13:26 +0300 Message-Id: <83eeat8rd5.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> In-Reply-To: <87czqdd0ng.fsf@HIDDEN> (message from Lars Ingebrigtsen on Mon, 16 Aug 2021 14:39:15 +0200) Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text References: <48592862-1630-4c61-aeed-1e3b720824de@default> <87czqdd0ng.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 21523 Cc: 21523 <at> debbugs.gnu.org, drew.adams@HIDDEN 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: -3.3 (---) > From: Lars Ingebrigtsen <larsi@HIDDEN> > Date: Mon, 16 Aug 2021 14:39:15 +0200 > Cc: 21523 <at> debbugs.gnu.org > > Drew Adams <drew.adams@HIDDEN> writes: > > > The Subject line is not very clear. Here is a recipe. You decide > > whether the behavior is correct or a bug. FWIW, this behavior is at > > least as old as Emacs 20 (with transient-mark-mode on). > > > > emacs -Q > > > > In buffer *scratch*, put point before "that" on the last line. > > `M-c', to capitalize "That". > > `C-SPC C-e', to select the text after "That", up to eol. > > (The region does not contain the word "That".) > > > > `C-_' to undo the last change within the region. > > The word "that" is inserted, giving this: > > > > ;; then enter the text in Thatthat file=A1=AFs own buffer. > > This bug is still present in Emacs 28. Why is it a bug? What is the expected "non-buggy" behavior in this case?
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
Full text available.Lars Ingebrigtsen <larsi@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 21523) by debbugs.gnu.org; 16 Aug 2021 12:39:35 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Aug 16 08:39:35 2021 Received: from localhost ([127.0.0.1]:48866 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1mFbtu-0008CZ-Ly for submit <at> debbugs.gnu.org; Mon, 16 Aug 2021 08:39:35 -0400 Received: from quimby.gnus.org ([95.216.78.240]:43376) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1mFbtm-0008Bt-Cg for 21523 <at> debbugs.gnu.org; Mon, 16 Aug 2021 08:39:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=UENnNHOcBo9HHGdY6od36QK7E6Stwy4tVPcPonf/Y2M=; b=W3uZCGZYZ0IMxnfn05SEHiuD6W 938h4YTfetHJHK4zCOM3nsQE85k+6Ok7OI3rDzkL17scQLNjRfsUledXRklBA+vN/l40dCVeyt7aO 7c3XyQEHSefupFwLCjHdsIOTbBTYWwuMLkdc1nweYQGjs8Umk69nxwdhAW1cM1gW3mls=; Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1mFbtb-0004pv-Te; Mon, 16 Aug 2021 14:39:19 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Drew Adams <drew.adams@HIDDEN> Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text References: <48592862-1630-4c61-aeed-1e3b720824de@default> Date: Mon, 16 Aug 2021 14:39:15 +0200 In-Reply-To: <48592862-1630-4c61-aeed-1e3b720824de@default> (Drew Adams's message of "Sun, 20 Sep 2015 00:34:06 -0700 (PDT)") Message-ID: <87czqdd0ng.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain 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: Drew Adams <drew.adams@HIDDEN> writes: > The Subject line is not very clear. Here is a recipe. You decide > whether the behavior is correct or a bug. FWIW, this behavior is at > least as old as Emacs 20 (with transient-mark-mode on). > > e [...] 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: 21523 Cc: 21523 <at> debbugs.gnu.org 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: -3.3 (---) Drew Adams <drew.adams@HIDDEN> writes: > The Subject line is not very clear. Here is a recipe. You decide > whether the behavior is correct or a bug. FWIW, this behavior is at > least as old as Emacs 20 (with transient-mark-mode on). > > emacs -Q > > In buffer *scratch*, put point before "that" on the last line. > `M-c', to capitalize "That". > `C-SPC C-e', to select the text after "That", up to eol. > (The region does not contain the word "That".) > > `C-_' to undo the last change within the region. > The word "that" is inserted, giving this: > > ;; then enter the text in Thatthat file=A1=AFs own buffer. This bug is still present in Emacs 28. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
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From: Stefan Monnier <monnier@HIDDEN>
To: Richard Stallman <rms@HIDDEN>
Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text
Message-ID: <jwvoagwop1o.fsf-monnier+emacsbugs@HIDDEN>
References: <48592862-1630-4c61-aeed-1e3b720824de@default>
<jwvwpvlqkh0.fsf-monnier+emacsbugs@HIDDEN>
<E1ZdjJz-0000AO-69@HIDDEN>
Date: Sun, 20 Sep 2015 15:43:14 -0400
In-Reply-To: <E1ZdjJz-0000AO-69@HIDDEN> (Richard Stallman's message
of "Sun, 20 Sep 2015 14:26:43 -0400")
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>> Or maybe the "undo-in-region" should only ever undo complete steps
>> (i.e. everything between two undo boundaries), so if any part of an undo
>> step affects text outside of the region, then the whole step is skipped.
> The undo commands are supposed to undo a complete change
> as one unit. If in this case it fails to do that, that would seem
> to be a bug, right?
Yes, that's what I was also trying to say. I think that'd be the
better fix.
Stefan
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
Full text available.Received: (at 21523) by debbugs.gnu.org; 20 Sep 2015 18:31:50 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Sep 20 14:31:50 2015 Received: from localhost ([127.0.0.1]:39095 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZdjOw-0000W1-3a for submit <at> debbugs.gnu.org; Sun, 20 Sep 2015 14:31:50 -0400 Received: from eggs.gnu.org ([208.118.235.92]:52584) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <rms@HIDDEN>) id 1ZdjOu-0000Vt-74 for 21523 <at> debbugs.gnu.org; Sun, 20 Sep 2015 14:31:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <rms@HIDDEN>) id 1ZdjOt-0006O3-A7 for 21523 <at> debbugs.gnu.org; Sun, 20 Sep 2015 14:31:47 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,T_RP_MATCHES_RCVD autolearn=disabled version=3.3.2 Received: from fencepost.gnu.org ([2001:4830:134:3::e]:50529) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <rms@HIDDEN>) id 1ZdjJz-0003xN-Pw; Sun, 20 Sep 2015 14:26:43 -0400 Received: from rms by fencepost.gnu.org with local (Exim 4.82) (envelope-from <rms@HIDDEN>) id 1ZdjJz-0000AO-69; Sun, 20 Sep 2015 14:26:43 -0400 Content-Type: text/plain; charset=Utf-8 From: Richard Stallman <rms@HIDDEN> To: Stefan Monnier <monnier@HIDDEN> In-reply-to: <jwvwpvlqkh0.fsf-monnier+emacsbugs@HIDDEN> (message from Stefan Monnier on Sun, 20 Sep 2015 11:14:29 -0400) Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text References: <48592862-1630-4c61-aeed-1e3b720824de@default> <jwvwpvlqkh0.fsf-monnier+emacsbugs@HIDDEN> Message-Id: <E1ZdjJz-0000AO-69@HIDDEN> Date: Sun, 20 Sep 2015 14:26:43 -0400 X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::e X-Spam-Score: -5.0 (-----) X-Debbugs-Envelope-To: 21523 Cc: 21523 <at> debbugs.gnu.org, drew.adams@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: rms@HIDDEN 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: -5.0 (-----) [[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > Or maybe the "undo-in-region" should only ever undo complete steps > (i.e. everything between two undo boundaries), so if any part of an undo > step affects text outside of the region, then the whole step is skipped. The undo commands are supposed to undo a complete change as one unit. If in this case it fails to do that, that would seem to be a bug, right? -- Dr Richard Stallman President, Free Software Foundation (gnu.org, fsf.org) Internet Hall-of-Famer (internethalloffame.org) Skype: No way! See stallman.org/skype.html.
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
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From: Stefan Monnier <monnier@HIDDEN>
To: Drew Adams <drew.adams@HIDDEN>
Subject: Re: bug#21523: 25.0.50; Undo with active region adds extra text
Message-ID: <jwvwpvlqkh0.fsf-monnier+emacsbugs@HIDDEN>
References: <48592862-1630-4c61-aeed-1e3b720824de@default>
Date: Sun, 20 Sep 2015 11:14:29 -0400
In-Reply-To: <48592862-1630-4c61-aeed-1e3b720824de@default> (Drew Adams's
message of "Sun, 20 Sep 2015 00:34:06 -0700 (PDT)")
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> `C-_' to undo the last change within the region.
> The word "that" is inserted, giving this:
> ;; then enter the text in Thatthat file's own buffer.
> This seems disconcerting, at least. (Same behavior for `M-u' etc.)
Indeed, that's wrong. I haven't looked in detail of why this happens,
but I can guess that it's because the previous change is represented as
"insert That" and "remove that", and when we undo them, the exact
location of "remove that" ends up right at the region boundary, making
it unclear whether it should be considered as "inside" or "outside".
Not sure how best to fix it. Maybe such replacements should have
a special status in the undo-list, so they aren't considered as
two independent changes (remove+insert) but as a single one.
Or maybe the "undo-in-region" should only ever undo complete steps
(i.e. everything between two undo boundaries), so if any part of an undo
step affects text outside of the region, then the whole step is skipped.
Stefan
bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
Full text available.Received: (at submit) by debbugs.gnu.org; 20 Sep 2015 07:41:01 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Sep 20 03:41:01 2015 Received: from localhost ([127.0.0.1]:38065 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZdZF6-0007Uh-UZ for submit <at> debbugs.gnu.org; Sun, 20 Sep 2015 03:41:01 -0400 Received: from eggs.gnu.org ([208.118.235.92]:57412) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <drew.adams@HIDDEN>) id 1ZdZF3-0007UT-Lz for submit <at> debbugs.gnu.org; Sun, 20 Sep 2015 03:40:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <drew.adams@HIDDEN>) id 1ZdZEy-0002bd-Au for submit <at> debbugs.gnu.org; Sun, 20 Sep 2015 03:40:57 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50 autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:37447) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <drew.adams@HIDDEN>) id 1ZdZEy-0002b1-8g for submit <at> debbugs.gnu.org; Sun, 20 Sep 2015 03:40:52 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38215) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <drew.adams@HIDDEN>) id 1ZdZ8f-0006Zm-AK for bug-gnu-emacs@HIDDEN; Sun, 20 Sep 2015 03:34:22 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <drew.adams@HIDDEN>) id 1ZdZ8a-0008BC-7C for bug-gnu-emacs@HIDDEN; Sun, 20 Sep 2015 03:34:21 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:45415) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <drew.adams@HIDDEN>) id 1ZdZ8Z-0008B8-Uo for bug-gnu-emacs@HIDDEN; Sun, 20 Sep 2015 03:34:16 -0400 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id t8K7YF4r013111 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for <bug-gnu-emacs@HIDDEN>; Sun, 20 Sep 2015 07:34:15 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0022.oracle.com (8.13.8/8.13.8) with ESMTP id t8K7YEI7032074 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for <bug-gnu-emacs@HIDDEN>; Sun, 20 Sep 2015 07:34:15 GMT Received: from abhmp0014.oracle.com (abhmp0014.oracle.com [141.146.116.20]) by aserv0122.oracle.com (8.13.8/8.13.8) with ESMTP id t8K7YEKH006562 for <bug-gnu-emacs@HIDDEN>; Sun, 20 Sep 2015 07:34:14 GMT MIME-Version: 1.0 Message-ID: <48592862-1630-4c61-aeed-1e3b720824de@default> Date: Sun, 20 Sep 2015 00:34:06 -0700 (PDT) From: Drew Adams <drew.adams@HIDDEN> To: bug-gnu-emacs@HIDDEN Subject: 25.0.50; Undo with active region adds extra text X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9 (901082) [OL 12.0.6691.5000 (x86)] Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-Source-IP: userv0022.oracle.com [156.151.31.74] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 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: -4.0 (----) The Subject line is not very clear. Here is a recipe. You decide whether the behavior is correct or a bug. FWIW, this behavior is at least as old as Emacs 20 (with transient-mark-mode on). emacs -Q In buffer *scratch*, put point before "that" on the last line. `M-c', to capitalize "That". `C-SPC C-e', to select the text after "That", up to eol. (The region does not contain the word "That".) `C-_' to undo the last change within the region. The word "that" is inserted, giving this: ;; then enter the text in Thatthat file=3DA1=3DAFs own buffer. This seems disconcerting, at least. (Same behavior for `M-u' etc.) (I can see the explanation of why this happens coming as a reply. As I say, you can decide whether this behavior is OK as is.) In GNU Emacs 25.0.50.1 (i686-pc-mingw32) of 2015-09-05 Bzr revision: 2330ca33a97867f2ea1123bcf7bfe5cfcc030b36 Windowing system distributor `Microsoft Corp.', version 6.1.7601 Configured using: `configure --host=3D3Di686-pc-mingw32 --enable-checking=3D3Dyes,glyphs'
Drew Adams <drew.adams@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#21523; Package emacs.
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