From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Glenn Morris Newsgroups: gmane.emacs.bugs Subject: bug#39233: .elc file - possibly outdated backward compatibility comments Date: Fri, 24 Jan 2020 14:19:08 -0500 Message-ID: References: <87zhefkhi9.fsf@marxist.se> <835zh1rz1o.fsf@gnu.org> <83v9p0ri8g.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="83807"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/) Cc: 39233@debbugs.gnu.org, stefan@marxist.se To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jan 24 20:20:12 2020 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 1iv4V1-000Ll3-Il for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 24 Jan 2020 20:20:11 +0100 Original-Received: from localhost ([::1]:46800 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iv4V0-0005Ta-ED for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 24 Jan 2020 14:20:10 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58476) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iv4Ut-0005TR-3g for bug-gnu-emacs@gnu.org; Fri, 24 Jan 2020 14:20:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iv4Us-0002Jd-3e for bug-gnu-emacs@gnu.org; Fri, 24 Jan 2020 14:20:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:48807) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iv4Ur-0002JP-W9 for bug-gnu-emacs@gnu.org; Fri, 24 Jan 2020 14:20:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iv4Ur-0002m9-RB for bug-gnu-emacs@gnu.org; Fri, 24 Jan 2020 14:20:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Glenn Morris Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 24 Jan 2020 19:20:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 39233 X-GNU-PR-Package: emacs Original-Received: via spool by 39233-submit@debbugs.gnu.org id=B39233.157989355810604 (code B ref 39233); Fri, 24 Jan 2020 19:20:01 +0000 Original-Received: (at 39233) by debbugs.gnu.org; 24 Jan 2020 19:19:18 +0000 Original-Received: from localhost ([127.0.0.1]:54780 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iv4UA-0002ky-8i for submit@debbugs.gnu.org; Fri, 24 Jan 2020 14:19:18 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:49252) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iv4U8-0002km-NW for 39233@debbugs.gnu.org; Fri, 24 Jan 2020 14:19:16 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:39353) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iv4U3-0001wg-CK; Fri, 24 Jan 2020 14:19:11 -0500 Original-Received: from rgm by fencepost.gnu.org with local (Exim 4.82) (envelope-from ) id 1iv4U0-0003la-RS; Fri, 24 Jan 2020 14:19:09 -0500 X-Spook: 2600 Magazine lock picking Relief security Antiviral X-Ran: hAHVy[=}imjgieN/Rj,B0JX/q!G$@1=CUyDHOWRc%sL'jrbq4}:wlY]s+tV_~!UY5LpRD8 X-Hue: blue X-Attribution: GM In-Reply-To: (Stefan Monnier's message of "Fri, 24 Jan 2020 13:45:34 -0500") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:175243 Archived-At: Stefan Monnier wrote: > + (format "(if (< emacs-major-version %d)\n" > + ;; Let's allow silently loading into Emacs-27 > + ;; files compiled with Emacs-28.0.NN since the two can > + ;; be almost identical (e.g. right after cutting the > + ;; release branch) and people running the development > + ;; branch can be presumed to know that it's risky anyway. > + (if (zerop emacs-minor-version) > + (1- emacs-major-version) emacs-major-version)) > + (format " (message \"BEWARE: %%S was compiled by a more recent version of Emacs (%s)\" #$))" emacs-version) > + "\n\n")))) This looks like an unsuppressible warning using a non-standard format ("BEWARE"), hard-coded into the elc? I had thought you would be doing this in lread.c, behind an option, similar to the existing load_dangerous_libraries. I guess the advantage (...) of your version is that it will have an immediate effect in pre-existing Emacs versions.