From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii 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 19:19:17 +0200 Message-ID: <83a5rfq6i2.fsf@gnu.org> References: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="24610"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 67196@debbugs.gnu.org To: Alan Mackenzie , Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Nov 15 18:20:34 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 1r3JZ4-00068W-9x for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 15 Nov 2023 18:20:34 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r3JYd-0007YY-SQ; Wed, 15 Nov 2023 12:20:07 -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 1r3JYa-0007Y1-1r for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 12:20:05 -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 1r3JYY-0002tN-GY for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 12:20:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1r3JYX-0006aC-KL for bug-gnu-emacs@gnu.org; Wed, 15 Nov 2023 12:20:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 15 Nov 2023 17:20:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 67196 X-GNU-PR-Package: emacs Original-Received: via spool by 67196-submit@debbugs.gnu.org id=B67196.170006877425257 (code B ref 67196); Wed, 15 Nov 2023 17:20:01 +0000 Original-Received: (at 67196) by debbugs.gnu.org; 15 Nov 2023 17:19:34 +0000 Original-Received: from localhost ([127.0.0.1]:53502 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1r3JY6-0006ZH-7B for submit@debbugs.gnu.org; Wed, 15 Nov 2023 12:19:34 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58860) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1r3JY4-0006Z0-5H for 67196@debbugs.gnu.org; Wed, 15 Nov 2023 12:19:32 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r3JXy-0002m0-6d; Wed, 15 Nov 2023 12:19:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=7sEa6aX/LwDlxP66Y0ZK70lMx4pub+pJz8pR8tt5tss=; b=dswCjmtoIaYl UUFVzvi6N6aXtMm6cfTkWHeJxROYcWDDkoYcMy/OGqLKTnA8TKj1gZG/GGjNmP+wy6TQ0spac1/eK rSH+QlThK1RXW+lSuosZuYlINUj/2efMwTbkfqDpNmDXkxsRpt/C5zhjqMX4xUPinhovBak42px8/ df14P6NY8E3+HuIi+BfdVZ/RU2Hu44y4hinhquc+Cuz/9lwVD6TzIBCvd3dE0FDna5+4K0HNU3Itz NdFCiK8o730/YwEmARajaMebTp2Ffo8zN2faAf5DaFG2EEff1VsEhvvZc1TtbaAn+IhCMIQWo1hlG Snxwa0ASt7IV7jWmCGYEkQ==; In-Reply-To: (message from Alan Mackenzie on Wed, 15 Nov 2023 13:48:40 +0000) 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:274396 Archived-At: > Date: Wed, 15 Nov 2023 13:48:40 +0000 > From: Alan Mackenzie > > 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-:. Aren't we doing this on purpose, Stefan?