From unknown Fri Aug 15 20:22:14 2025 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) Content-Type: text/plain; charset=utf-8 From: bug#6083 <6083@debbugs.gnu.org> To: bug#6083 <6083@debbugs.gnu.org> Subject: Status: Regression bug in auto-coding-alist Reply-To: bug#6083 <6083@debbugs.gnu.org> Date: Sat, 16 Aug 2025 03:22:14 +0000 retitle 6083 Regression bug in auto-coding-alist reassign 6083 emacs submitter 6083 Juri Linkov severity 6083 normal thanks From debbugs-submit-bounces@debbugs.gnu.org Sun May 02 20:36:57 2010 Received: (at submit) by debbugs.gnu.org; 3 May 2010 00:36:57 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O8jeb-00059v-Fg for submit@debbugs.gnu.org; Sun, 02 May 2010 20:36:57 -0400 Received: from mx10.gnu.org ([199.232.76.166]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O8jea-00059q-2D for submit@debbugs.gnu.org; Sun, 02 May 2010 20:36:56 -0400 Received: from lists.gnu.org ([199.232.76.165]:44680) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1O8jeW-00013z-4C for submit@debbugs.gnu.org; Sun, 02 May 2010 20:36:52 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1O8jeV-0006PD-Mq for bug-gnu-emacs@gnu.org; Sun, 02 May 2010 20:36:51 -0400 Received: from [140.186.70.92] (port=51574 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O8jeU-0006P5-3X for bug-gnu-emacs@gnu.org; Sun, 02 May 2010 20:36:51 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.0 (2010-01-18) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW autolearn=unavailable version=3.3.0 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1O8jeS-000489-He for bug-gnu-emacs@gnu.org; Sun, 02 May 2010 20:36:50 -0400 Received: from smtp-out2.starman.ee ([85.253.0.4]:39410 helo=mx2.starman.ee) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O8jeS-00047m-25 for bug-gnu-emacs@gnu.org; Sun, 02 May 2010 20:36:48 -0400 X-Virus-Scanned: by Amavisd-New at mx2.starman.ee Received: from mail.starman.ee (82.131.92.108.cable.starman.ee [82.131.92.108]) by mx2.starman.ee (Postfix) with ESMTP id D41713F40A7 for ; Mon, 3 May 2010 03:36:43 +0300 (EEST) From: Juri Linkov To: bug-gnu-emacs@gnu.org Subject: Regression bug in auto-coding-alist Organization: JURTA Date: Mon, 03 May 2010 03:34:00 +0300 Message-ID: <87k4rlx1qf.fsf@mail.jurta.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-Spam-Score: -5.0 (-----) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -5.0 (-----) I just discovered a regression bug wrt 23.1. Loading arc-mode fails. Arc-mode is a mode for the programming language Arc, not for file archives. It contains the following code to remove `no-conversion' associated with the .arc extension from `auto-coding-alist' because there is a file extension clash between Arc the programming language and file archives: ;; By default, Emacs thinks .arc is an archive extension. ;; This makes it normal. (dolist (coding auto-coding-alist) (when (and (string-match "[Aa][Rr][Cc]\\\\|" (car coding)) (or (eq (cdr coding) 'no-conversion) (eq (cdr coding) 'no-conversion-multibyte))) (setcar coding (replace-match "" nil nil (car coding))))) This code fails with (error "Attempt to modify read-only object") A similar bug#4917 http://debbugs.gnu.org/4917 for `auto-coding-regexp-alist' was fixed 2009-11-13 by using purecopy only for car or each item, not the whole list. To make the code above to not fail, purecopy should be removed from `auto-coding-alist'. -- Juri Linkov http://www.jurta.org/emacs/ From debbugs-submit-bounces@debbugs.gnu.org Sun May 02 22:03:07 2010 Received: (at 6083-done) by debbugs.gnu.org; 3 May 2010 02:03:07 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O8kzz-0005jy-9Z for submit@debbugs.gnu.org; Sun, 02 May 2010 22:03:07 -0400 Received: from pantheon-po33.its.yale.edu ([130.132.50.94]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O8kzx-0005jc-8d for 6083-done@debbugs.gnu.org; Sun, 02 May 2010 22:03:05 -0400 Received: from furry (adsl-99-75-106-162.dsl.wlfrct.sbcglobal.net [99.75.106.162]) (authenticated bits=0) by pantheon-po33.its.yale.edu (8.12.11.20060308/8.12.11) with ESMTP id o43231aH026724 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Sun, 2 May 2010 22:03:01 -0400 Received: by furry (Postfix, from userid 1000) id E548BC055; Sun, 2 May 2010 22:03:00 -0400 (EDT) From: Chong Yidong To: Juri Linkov Subject: Re: bug#6083: Regression bug in auto-coding-alist References: <87k4rlx1qf.fsf@mail.jurta.org> Date: Sun, 02 May 2010 22:02:59 -0400 In-Reply-To: <87k4rlx1qf.fsf@mail.jurta.org> (Juri Linkov's message of "Mon, 03 May 2010 03:34:00 +0300") Message-ID: <87y6g1spws.fsf@stupidchicken.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.96 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-YaleITSMailFilter: Version 1.2c (attachment(s) not renamed) X-Spam-Score: -3.1 (---) X-Debbugs-Envelope-To: 6083-done Cc: 6083-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -3.1 (---) Juri Linkov writes: > ;; By default, Emacs thinks .arc is an archive extension. > ;; This makes it normal. > (dolist (coding auto-coding-alist) > (when (and (string-match "[Aa][Rr][Cc]\\\\|" (car coding)) > (or (eq (cdr coding) 'no-conversion) > (eq (cdr coding) 'no-conversion-multibyte))) > (setcar coding (replace-match "" nil nil (car coding))))) > > This code fails with > > (error "Attempt to modify read-only object") > > A similar bug#4917 http://debbugs.gnu.org/4917 > for `auto-coding-regexp-alist' was fixed 2009-11-13 > by using purecopy only for car or each item, > not the whole list. > > To make the code above to not fail, purecopy should be removed > from `auto-coding-alist'. Thanks, I've fixed it in the branch. From unknown Fri Aug 15 20:22:14 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: bug archived. Date: Mon, 31 May 2010 11:24:03 +0000 User-Agent: Fakemail v42.6.9 # This is a fake control message. # # The action: # bug archived. thanks # This fakemail brought to you by your local debbugs # administrator