From unknown Sat Aug 16 11:09:49 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#18786 <18786@debbugs.gnu.org> To: bug#18786 <18786@debbugs.gnu.org> Subject: Status: (error "Attempt to modify read-only object" (("\\.txz\\'" . tar-mode))) on adding mode Reply-To: bug#18786 <18786@debbugs.gnu.org> Date: Sat, 16 Aug 2025 18:09:49 +0000 retitle 18786 (error "Attempt to modify read-only object" (("\\.txz\\'" . t= ar-mode))) on adding mode reassign 18786 emacs submitter 18786 Boyan Penkov severity 18786 normal thanks From debbugs-submit-bounces@debbugs.gnu.org Tue Oct 21 09:41:37 2014 Received: (at submit) by debbugs.gnu.org; 21 Oct 2014 13:41:37 +0000 Received: from localhost ([127.0.0.1]:57953 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgZgu-00025F-5Q for submit@debbugs.gnu.org; Tue, 21 Oct 2014 09:41:36 -0400 Received: from eggs.gnu.org ([208.118.235.92]:60721) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgZaC-0001u1-3K for submit@debbugs.gnu.org; Tue, 21 Oct 2014 09:34:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XgZa1-00046a-S5 for submit@debbugs.gnu.org; Tue, 21 Oct 2014 09:34:34 -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,FREEMAIL_FROM, T_DKIM_INVALID autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:57781) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgZa1-00046O-Om for submit@debbugs.gnu.org; Tue, 21 Oct 2014 09:34:29 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34169) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgZZw-000362-OX for bug-gnu-emacs@gnu.org; Tue, 21 Oct 2014 09:34:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XgZZr-00044l-VY for bug-gnu-emacs@gnu.org; Tue, 21 Oct 2014 09:34:24 -0400 Received: from mail-qa0-x22e.google.com ([2607:f8b0:400d:c00::22e]:49600) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgZZr-00043G-Sa for bug-gnu-emacs@gnu.org; Tue, 21 Oct 2014 09:34:19 -0400 Received: by mail-qa0-f46.google.com with SMTP id s7so399519qap.5 for ; Tue, 21 Oct 2014 06:34:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:subject:message-id:date :to:mime-version; bh=4MdABq7iCOdS1AB6evMaDrjA46ncFVeERo6ZJICsmsQ=; b=Kev7h2vTUem5zs9j01aq8o9b+A2HZBPT66X/RF13VWeQzEZ9qKq47vOLEJObbZyXNu kSIB6VQXeMJlA4ym/pOWA3jB4k0jLlN7WCXoiV9x3xkqZu9W+p2OcVhSfvkRuJMZp3iR 24lWaDMI08b+E2D5QX1drkiE9JipuLQqTwp0zJpogw7v7HKUK7V1Z7G1I7e5ZK9gzwoy UUauEtfeL/b2mmf44+eEwDjJAuIAa4kZKi6TjtJypRvMO/agzga4TsjGaQz9WF8ppG6L +7BZ2ICgkbTLThNYcUBi3vyZ77FeJ4Q8bX5F6Ow46ZOsxKqARLxD/FwApmtlFAL76Shc HugA== X-Received: by 10.140.41.39 with SMTP id y36mr43415756qgy.64.1413898454533; Tue, 21 Oct 2014 06:34:14 -0700 (PDT) Received: from dyn-128-59-87-23.dyn.columbia.edu (dyn-128-59-87-23.dyn.columbia.edu. [128.59.87.23]) by mx.google.com with ESMTPSA id a3sm10681282qaa.49.2014.10.21.06.34.13 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 21 Oct 2014 06:34:14 -0700 (PDT) From: Boyan Penkov Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: (error "Attempt to modify read-only object" (("\\.txz\\'" . tar-mode))) on adding mode Message-Id: <8E165C5B-40DE-437D-A76C-D1B5CDE44318@gmail.com> Date: Tue, 21 Oct 2014 09:34:10 -0400 To: bug-gnu-emacs@gnu.org Mime-Version: 1.0 (Mac OS X Mail 8.0 \(1990.1\)) X-Mailer: Apple Mail (2.1990.1) X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). 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-Mailman-Approved-At: Tue, 21 Oct 2014 09:41:34 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -4.0 (----) Hey folks, I have a bunch of stuff like:=20 (nconc auto-mode-alist '(("\\.ctl" . scheme-mode)))) in my .emacs. =20 When I launch emacs, the complaint is: error: Attempt to modify read-only object, ((\.txz\' . tar-mode)) Clearing all the auto-mode-alist additions clears this error, by pulling = them out of the .emacs. Can anybody explain what is going on? This has emerged after upgrading last night to 24.4 using both = http://emacsformacosx.com/ and compiling for myself via homebrew. I=E2=80= =99m on Mac OS 10.10 Yosemite. Please let me know how to help debug this. Cheers! -- Boyan Penkov www.boyanpenkov.com From debbugs-submit-bounces@debbugs.gnu.org Tue Oct 21 11:20:07 2014 Received: (at 18786) by debbugs.gnu.org; 21 Oct 2014 15:20:07 +0000 Received: from localhost ([127.0.0.1]:58684 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgbEE-0004uW-PZ for submit@debbugs.gnu.org; Tue, 21 Oct 2014 11:20:07 -0400 Received: from cantor2.suse.de ([195.135.220.15]:32810 helo=mx2.suse.de) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgbEC-0004uI-R5 for 18786@debbugs.gnu.org; Tue, 21 Oct 2014 11:20:05 -0400 Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 9A1A3ACD9; Tue, 21 Oct 2014 15:20:03 +0000 (UTC) From: Andreas Schwab To: Boyan Penkov Subject: Re: bug#18786: (error "Attempt to modify read-only object" (("\\.txz\\'" . tar-mode))) on adding mode References: <8E165C5B-40DE-437D-A76C-D1B5CDE44318@gmail.com> X-Yow: An INK-LING? Sure -- TAKE one!! Did you BUY any COMMUNIST UNIFORMS?? Date: Tue, 21 Oct 2014 17:20:03 +0200 In-Reply-To: <8E165C5B-40DE-437D-A76C-D1B5CDE44318@gmail.com> (Boyan Penkov's message of "Tue, 21 Oct 2014 09:34:10 -0400") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -6.4 (------) X-Debbugs-Envelope-To: 18786 Cc: 18786@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -6.4 (------) Boyan Penkov writes: > I have a bunch of stuff like: > > (nconc auto-mode-alist '(("\\.ctl" . scheme-mode)))) > > in my .emacs. Don't use destructive functions unless you know what you are doing. Andreas. -- Andreas Schwab, SUSE Labs, schwab@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different." From debbugs-submit-bounces@debbugs.gnu.org Tue Oct 21 11:46:51 2014 Received: (at 18786) by debbugs.gnu.org; 21 Oct 2014 15:46:51 +0000 Received: from localhost ([127.0.0.1]:58719 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xgbe7-00064h-BQ for submit@debbugs.gnu.org; Tue, 21 Oct 2014 11:46:51 -0400 Received: from mail-qc0-f182.google.com ([209.85.216.182]:42532) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xgbe5-00064O-KP for 18786@debbugs.gnu.org; Tue, 21 Oct 2014 11:46:50 -0400 Received: by mail-qc0-f182.google.com with SMTP id i17so1165181qcy.13 for <18786@debbugs.gnu.org>; Tue, 21 Oct 2014 08:46:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :message-id:references:to; bh=Rn76A5WmT5y+MA9INq1ZDr2D0kkIHn/JiXyhlwKwN6k=; b=MGDwaDgpY05bHisWgjILV81dDGx2QbkP82mfNtABDvS5UT3bOJVXZaQfMT73N5lI+G ImeEsXiTpuclyAgNSMbFM1zrQaTFfJNXWiFcPbcw7WBSjOASnAINcEtpFPXcJQzUCWmF tKGL8TraOzx+iRFhJs13eVk0yNt4i0MWac+GieKiwSPmWcX2gAWwJhLlf5KEg6jrYH/X 5r4TgsLbARAflwojKwZKbOykDBWmr8v36YgkJZXBZ39+zkbLmnPkMXkCbk41UeUpBUX8 PY1XAkVg7nhMZX1b7khrIJNXa5nEoMz/UWzSlLjkgj0FfKP2zP3rCRCPtzK57V2e8Eap H1jw== X-Received: by 10.224.74.135 with SMTP id u7mr1134730qaj.41.1413906402845; Tue, 21 Oct 2014 08:46:42 -0700 (PDT) Received: from dyn-128-59-87-23.dyn.columbia.edu ([128.59.87.23]) by mx.google.com with ESMTPSA id e8sm10982710qai.33.2014.10.21.08.46.42 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 21 Oct 2014 08:46:42 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_22E168C5-9FBA-4FED-A910-04DF06C3ECD6" Mime-Version: 1.0 (Mac OS X Mail 8.0 \(1990.1\)) Subject: Re: bug#18786: (error "Attempt to modify read-only object" (("\\.txz\\'" . tar-mode))) on adding mode From: Boyan Penkov In-Reply-To: Date: Tue, 21 Oct 2014 11:46:34 -0400 Message-Id: <6C2D7F95-45CD-460B-84F5-11AF84D3DDCD@gmail.com> References: <8E165C5B-40DE-437D-A76C-D1B5CDE44318@gmail.com> To: Andreas Schwab X-Mailer: Apple Mail (2.1990.1) X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 18786 Cc: 18786@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) --Apple-Mail=_22E168C5-9FBA-4FED-A910-04DF06C3ECD6 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 -- Boyan Penkov www.boyanpenkov.com > On Oct 21, 2014, at 11:20 AM, Andreas Schwab wrote: >=20 > Boyan Penkov writes: >=20 >> I have a bunch of stuff like:=20 >>=20 >> (nconc auto-mode-alist '(("\\.ctl" . scheme-mode)))) >>=20 >> in my .emacs. =20 >=20 > Don't use destructive functions unless you know what you are doing. Yeah, predictably, emacs is fine and I=E2=80=99m the idiot: nconc=E2=80=99= s have been replaced with add-to-list, documentation read and lesson = learned. Thanks for the pointer! >=20 > Andreas. >=20 > --=20 > Andreas Schwab, SUSE Labs, schwab@suse.de > GPG Key fingerprint =3D 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA = B9D7 > "And now for something completely different." --Apple-Mail=_22E168C5-9FBA-4FED-A910-04DF06C3ECD6 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
--
Boyan Penkov
www.boyanpenkov.com

On Oct 21, 2014, at 11:20 AM, Andreas Schwab <schwab@suse.de> = wrote:

Boyan = Penkov <boyan.penkov@gmail.com> writes:

I have a bunch of stuff = like:

   (nconc = auto-mode-alist '(("\\.ctl" . = scheme-mode))))

in my .emacs.  

Don't use destructive functions = unless you know what you are doing.

Yeah, = predictably, emacs is fine and I=E2=80=99m the idiot: nconc=E2=80=99s = have been replaced with add-to-list, documentation read and lesson = learned.

Thanks for the = pointer!


Andreas.

--
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint =3D 0196 = BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And = now for something completely different."

= --Apple-Mail=_22E168C5-9FBA-4FED-A910-04DF06C3ECD6-- From debbugs-submit-bounces@debbugs.gnu.org Tue Oct 21 12:39:40 2014 Received: (at 18786) by debbugs.gnu.org; 21 Oct 2014 16:39:40 +0000 Received: from localhost ([127.0.0.1]:58763 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgcTD-0007h6-JV for submit@debbugs.gnu.org; Tue, 21 Oct 2014 12:39:39 -0400 Received: from pruche.dit.umontreal.ca ([132.204.246.22]:47346) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgcTB-0007gp-21 for 18786@debbugs.gnu.org; Tue, 21 Oct 2014 12:39:37 -0400 Received: from ceviche.home (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.1/8.14.1) with ESMTP id s9LGdZYp029079; Tue, 21 Oct 2014 12:39:36 -0400 Received: by ceviche.home (Postfix, from userid 20848) id C04F2660D6; Tue, 21 Oct 2014 12:39:40 -0400 (EDT) From: Stefan Monnier To: Boyan Penkov Subject: Re: bug#18786: (error "Attempt to modify read-only object" (("\\.txz\\'" . tar-mode))) on adding mode Message-ID: References: <8E165C5B-40DE-437D-A76C-D1B5CDE44318@gmail.com> Date: Tue, 21 Oct 2014 12:39:40 -0400 In-Reply-To: <8E165C5B-40DE-437D-A76C-D1B5CDE44318@gmail.com> (Boyan Penkov's message of "Tue, 21 Oct 2014 09:34:10 -0400") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-NAI-Spam-Flag: NO X-NAI-Spam-Level: X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0.2 X-NAI-Spam-Rules: 2 Rules triggered GEN_SPAM_FEATRE=0.2, RV5101=0 X-NAI-Spam-Version: 2.3.0.9378 : core <5101> : inlines <1416> : streams <1322613> : uri <1827315> X-Spam-Score: -2.8 (--) X-Debbugs-Envelope-To: 18786 Cc: 18786@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.8 (--) > (nconc auto-mode-alist '(("\\.ctl" . scheme-mode)))) Try (add-to-list 'auto-mode-alist '("\\.ctl\\'" . scheme-mode)) -- Stefan From debbugs-submit-bounces@debbugs.gnu.org Tue Oct 21 14:02:46 2014 Received: (at 18786-done) by debbugs.gnu.org; 21 Oct 2014 18:02:46 +0000 Received: from localhost ([127.0.0.1]:58790 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xgdle-0001ee-4z for submit@debbugs.gnu.org; Tue, 21 Oct 2014 14:02:46 -0400 Received: from ironport2-out.teksavvy.com ([206.248.154.181]:61731) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xgdlb-0001eI-Ky for 18786-done@debbugs.gnu.org; Tue, 21 Oct 2014 14:02:44 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ArUGAIDvNVNFpY87/2dsb2JhbABZgwaDSsA9gRcXdIIlAQEBAQIBVigLCzQHCxQYDYgoCNIZF48BFoQiBKkZgWqBcYFbIQ X-IPAS-Result: ArUGAIDvNVNFpY87/2dsb2JhbABZgwaDSsA9gRcXdIIlAQEBAQIBVigLCzQHCxQYDYgoCNIZF48BFoQiBKkZgWqBcYFbIQ X-IronPort-AV: E=Sophos;i="4.97,753,1389762000"; d="scan'208";a="94755012" Received: from 69-165-143-59.dsl.teksavvy.com (HELO pastel.home) ([69.165.143.59]) by ironport2-out.teksavvy.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 21 Oct 2014 14:02:37 -0400 Received: by pastel.home (Postfix, from userid 20848) id 83DF44820; Tue, 21 Oct 2014 14:02:37 -0400 (EDT) From: Stefan Monnier To: 18786-done@debbugs.gnu.org Subject: Re: bug#18786: (error "Attempt to modify read-only object" (("\\.txz\\'" . tar-mode))) on adding mode Message-ID: References: <8E165C5B-40DE-437D-A76C-D1B5CDE44318@gmail.com> <9D69294C-9454-4E64-90A8-90AA7FAD076B@gmail.com> Date: Tue, 21 Oct 2014 14:02:37 -0400 In-Reply-To: <9D69294C-9454-4E64-90A8-90AA7FAD076B@gmail.com> (Boyan Penkov's message of "Tue, 21 Oct 2014 12:40:24 -0400") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.3 (/) X-Debbugs-Envelope-To: 18786-done X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 0.3 (/) > Thanks for the pointer! You're welcome, closed, Stefan From unknown Sat Aug 16 11:09:49 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: bug archived. Date: Wed, 19 Nov 2014 12:24:04 +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