From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= Newsgroups: gmane.emacs.devel Subject: Re: Emacs 27.1 released Date: Sun, 16 Aug 2020 10:19:06 +0200 Message-ID: References: <87a6z2ds3y.fsf@petton.fr> <834kp9ox92.fsf@gnu.org> <87ft8smgje.fsf@gmx.de> <83k0y4ndwz.fsf@gnu.org> <83bljfolp8.fsf@gnu.org> <01498CD4-5E25-4785-941C-D6E9A100ED7F@acm.org> <837du3oh2w.fsf@gnu.org> <83y2mjn00q.fsf@gnu.org> <7248DF65-C427-4D10-AD48-3240B3EF66A7@acm.org> <83v9hllq83.fsf@gnu.org> <02BFD331-A68B-4BD1-85D7-37413056E52B@acm.org> <83eeo9l5k6.fsf@gnu.org> Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.15\)) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="34301"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Aug 16 10:20:04 2020 Return-path: Envelope-to: ged-emacs-devel@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 1k7Dta-0008op-Kh for ged-emacs-devel@m.gmane-mx.org; Sun, 16 Aug 2020 10:20:02 +0200 Original-Received: from localhost ([::1]:42676 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k7DtZ-0008IF-Ls for ged-emacs-devel@m.gmane-mx.org; Sun, 16 Aug 2020 04:20:01 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53266) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7Dt1-0007tC-KR for emacs-devel@gnu.org; Sun, 16 Aug 2020 04:19:27 -0400 Original-Received: from mail153c50.megamailservers.eu ([91.136.10.163]:46802 helo=mail50c50.megamailservers.eu) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7Dsy-0001Ko-GP; Sun, 16 Aug 2020 04:19:27 -0400 X-Authenticated-User: mattiase@bredband.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1597565949; bh=74eOzIOg0kpML5zpMbBrCfnaO1Q08iRnURfbW3dZnV4=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=H/2uLmqbFsWL2U2tVGENaxICE2ygyRqMIdMsu3nwLtGTWLu0rlaWKyMgbCmlZ7z7/ 525wpxkw7iOi+46icguPjDs8GTN0U28qP4ib07WIusPRv+idMi5dheKbP5VAEWVnBg r4e7qHIPndLkGqLG2m9cl36A5NOG223eacK7/vRg= Feedback-ID: mattiase@acm.or Original-Received: from [192.168.0.4] (c188-150-171-71.bredband.comhem.se [188.150.171.71]) (authenticated bits=0) by mail50c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 07G8J7xo026696; Sun, 16 Aug 2020 08:19:09 +0000 In-Reply-To: <83eeo9l5k6.fsf@gnu.org> X-Mailer: Apple Mail (2.3445.104.15) X-CTCH-RefID: str=0001.0A782F1D.5F38EBFD.0049, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=NoevjPVJ c=1 sm=1 tr=0 a=SF+I6pRkHZhrawxbOkkvaA==:117 a=SF+I6pRkHZhrawxbOkkvaA==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=wKqkH3311e0NT3t0-m0A:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Origin-Country: SE Received-SPF: softfail client-ip=91.136.10.163; envelope-from=mattiase@acm.org; helo=mail50c50.megamailservers.eu X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/16 04:19:09 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x (no timestamps) [generic] X-Spam_score_int: -11 X-Spam_score: -1.2 X-Spam_bar: - X-Spam_report: (-1.2 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, SPF_HELO_NONE=0.001, SPF_SOFTFAIL=0.665, URIBL_BLOCKED=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:253838 Archived-At: 14 aug. 2020 kl. 15.28 skrev Eli Zaretskii : > I actually didn't consider the code at all in this case, I tried to > approach the issue from the POV of risk management. I understand what you mean, but it is not very different from what a = maintainer fixing a bug does; assessing consequences and risks is part = of the job. > What bothers me is the risk of having the fix uncover as yet unknown > problems in the callers of the function that was fixed. Do you have > any thoughts about that? For example, if the callers are already > broken when the fixed function misbehaved (are they?), that would be a > strong argument to cherry-pick the changes, because they cannot > possibly break what is already broken. Well, there is no indication that callers of calcFunc-gcd are of = particularly low quality. Solid tests would have helped, of course: were = Calc written today we would have insisted on a very different degree of = test coverage, but that was not the standard coding practice at the = time. Without spending the time to build a full test suite for the = considerable amount of functionality of Calc, the best we can do is to = fix bugs using careful analysis and good habits and add well-targeted = tests for the flaw and nearby code without succumbing to exponential = explosion. We then sit back and wait until we believe time has tested = it. On the other hand, Calc is fairly easy to validate in the respect that = it's often just a matter of doing what is mathematically correct and = things will sort themselves out. Anything going wrong after fixing one = part was therefore almost by definition already broken. It was not quite = what you meant, but perhaps it gives a partial answer to your question. That said, none of the bug fixes mentioned were of high importance. The = way Emacs development works, it's likely better to encourage users to = build and use Emacs master rather than back-porting anything to a stable = branch.