From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.bugs Subject: bug#67196: M-: uses a wrong value of debug-on-error when it is nil. Date: Wed, 15 Nov 2023 13:48:40 +0000 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="5377"; mail-complaints-to="usenet@ciao.gmane.io" To: 67196@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Nov 15 18:03:08 2023 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 1r3JIB-0001F4-0n for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 15 Nov 2023 18:03:07 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r3JI8-00016H-Mx; Wed, 15 Nov 2023 12:03:04 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r3JI7-00015G-Dt for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 12:03:03 -0500 Original-Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1r3JI7-0003vF-5P for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 12:03:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1r3JI6-00062Y-7l for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 12:03:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Alan Mackenzie Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 15 Nov 2023 17:03:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 67196 X-GNU-PR-Package: emacs X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.170006772523007 (code B ref -1); Wed, 15 Nov 2023 17:03:02 +0000 Original-Received: (at submit) by debbugs.gnu.org; 15 Nov 2023 17:02:05 +0000 Original-Received: from localhost ([127.0.0.1]:53333 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1r3JHA-0005z1-Je for submit@debbugs.gnu.org; Wed, 15 Nov 2023 12:02:04 -0500 Original-Received: from lists.gnu.org ([2001:470:142::17]:49592) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1r3JH8-0005xa-1V for submit@debbugs.gnu.org; Wed, 15 Nov 2023 12:02:03 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r3GGR-00007v-Ni for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 08:49:07 -0500 Original-Received: from mail.muc.de ([193.149.48.3]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r3GGP-000724-Nr for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 08:49:07 -0500 Original-Received: (qmail 79097 invoked by uid 3782); 15 Nov 2023 14:48:41 +0100 Original-Received: from acm.muc.de (p4fe15c08.dip0.t-ipconnect.de [79.225.92.8]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Wed, 15 Nov 2023 14:48:40 +0100 Original-Received: (qmail 11906 invoked by uid 1000); 15 Nov 2023 13:48:40 -0000 Content-Disposition: inline X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.3; envelope-from=acm@muc.de; helo=mail.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:274390 Archived-At: Hello, Emacs. On the master branch (and probably any recent Emacs): (i) emacs -Q (ii) C-h v debug-on-error RET (iii) M-: debug-on-error RET >From (ii) it will be seen that debug-on-error's value is nil. (iii) wrongly reports that its value is t. This is a bug. ######################################################################### What is happening here is that eval-expression binds debug-on-error to an uninterned symbol called "t", so that d-o-e will be set to non-nil for the evaluation of the coming form. This has the unwanted side effect of ignoring the actual value of d-o-e in forms which use it. For example, if the variable is set to a list of error symbols, this value gets ignored on evaluating a form with M-:. -- Alan Mackenzie (Nuremberg, Germany).