From unknown Sat Jun 14 14:26:54 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#26960 <26960@debbugs.gnu.org> To: bug#26960 <26960@debbugs.gnu.org> Subject: Status: 26.0.50; Complaints about unused variable in cl-destructuring-bind Reply-To: bug#26960 <26960@debbugs.gnu.org> Date: Sat, 14 Jun 2025 21:26:54 +0000 retitle 26960 26.0.50; Complaints about unused variable in cl-destructuring= -bind reassign 26960 emacs submitter 26960 Philipp Stephani severity 26960 minor thanks From debbugs-submit-bounces@debbugs.gnu.org Wed May 17 05:23:41 2017 Received: (at submit) by debbugs.gnu.org; 17 May 2017 09:23:41 +0000 Received: from localhost ([127.0.0.1]:49549 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dAvBF-0004He-01 for submit@debbugs.gnu.org; Wed, 17 May 2017 05:23:41 -0400 Received: from eggs.gnu.org ([208.118.235.92]:47810) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dAvBD-0004HQ-Oa for submit@debbugs.gnu.org; Wed, 17 May 2017 05:23:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dAvB7-0000Ln-6O for submit@debbugs.gnu.org; Wed, 17 May 2017 05:23:34 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_50, FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,T_DKIM_INVALID autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:43822) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dAvB7-0000LY-2h for submit@debbugs.gnu.org; Wed, 17 May 2017 05:23:33 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38773) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dAvB5-0004dj-Mo for bug-gnu-emacs@gnu.org; Wed, 17 May 2017 05:23:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dAvB4-0000Kp-Cm for bug-gnu-emacs@gnu.org; Wed, 17 May 2017 05:23:31 -0400 Received: from mail-wm0-x229.google.com ([2a00:1450:400c:c09::229]:38105) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dAvB4-0000KW-4Z for bug-gnu-emacs@gnu.org; Wed, 17 May 2017 05:23:30 -0400 Received: by mail-wm0-x229.google.com with SMTP id v15so8981376wmv.1 for ; Wed, 17 May 2017 02:23:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=7RMVrl7wLRQBnCUHF/KAqbgb+nszAbayIT7b2GD/dK0=; b=jkZ/Cn2/VUGSv5Al9SKtG1+NsMvsuX8Yiq0xehk6GZvTbaD77q4oTE+XPe88afLGOQ 1DX0CpH9RiSLUpnRT8zfG4EGC3PNLkc90mOKYz50isUL1nJiXgM/zhAtdyO2/Yl7BRRX tL9VCyTTEgd1GQgkgy9g1RKv8lM6Fkb3GzGfRkPtQCUaICtxjR8L9zdNozSyNmXakVo/ 77GPPSpTK+yh3wjKOBxxJx2ewdpeW3KKOiyAodfU1I5IUxQc331TCVmaEHumMxE1kRdt 9s18TvwU3VcBuVyzXhDt2D9GmYUPnMGCPFTJnbAcCJsZe00dmm3R/Y6hxvasIfRTnsfO /6gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=7RMVrl7wLRQBnCUHF/KAqbgb+nszAbayIT7b2GD/dK0=; b=h17rX96Z8Hff+Ofmf+B3X4Cr01hAR5WQog/EtMQGZPLtHPWXoiDOWfv8mA7U6JH5SA GSC0zOS+Ee7QjQJeLh6L4suxOk/CUeZMYgSeE8iIv2SoF/Pf0lDaOOt7lOw/8TKZYVyZ 169wjD9fa2xApbu+wEtFJMBM2HUT4IP5t5rxIyqOEobXHsWsLAgiZQWVMyxVd2WgMP3i NsBiShmVzQmB0hps9VXhS/hia3WIG9MSIfFuLjbF0fZ/UsRxgVtlHbS1fIcBRdBEx13j 8p3mGPAQyQhZm3YrJJQ4th4Re67avklnGYawFvRndbn/3SlA1NdFcgpayctjLUviCL1i gAeg== X-Gm-Message-State: AODbwcDr+cDyOuDVF2eUUrxFvnMoPzh3JdBo2cVRuuBKOPSFv25C3/MG r+keeYPZs4rWYu+Pj8E= X-Received: by 10.28.236.89 with SMTP id k86mr10342373wmh.69.1495013008669; Wed, 17 May 2017 02:23:28 -0700 (PDT) Received: from a.muc.corp.google.com ([2a00:79e0:15:2:384d:f071:332f:d0e5]) by smtp.gmail.com with ESMTPSA id v7sm1637599wrv.59.2017.05.17.02.23.27 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Wed, 17 May 2017 02:23:27 -0700 (PDT) From: Philipp Stephani To: bug-gnu-emacs@gnu.org Subject: 26.0.50; Complaints about unused variable in cl-destructuring-bind Date: Wed, 17 May 2017 11:23:27 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -3.8 (---) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.8 (---) Create a file with the following contents (here /tmp/destr.el): ;;; -*- lexical-binding: t; -*- (require 'cl-lib) (cl-destructuring-bind (&whole a b &rest _) '(1 2) (print (list a b))) Then run emacs -Q -batch -f batch-byte-compile /tmp/destr.el The byte compiler will complain: In toplevel form: /tmp/destr.el:3:1:Warning: variable =E2=80=98_=E2=80=99 not left unused even though the variable is clearly unused. 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From debbugs-submit-bounces@debbugs.gnu.org Wed May 17 07:58:03 2017 Received: (at control) by debbugs.gnu.org; 17 May 2017 11:58:03 +0000 Received: from localhost ([127.0.0.1]:49647 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dAxad-0001AR-KS for submit@debbugs.gnu.org; Wed, 17 May 2017 07:58:03 -0400 Received: from mail-it0-f41.google.com ([209.85.214.41]:38543) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dAxab-00019w-CE for control@debbugs.gnu.org; Wed, 17 May 2017 07:58:01 -0400 Received: by mail-it0-f41.google.com with SMTP id e65so7335839ita.1 for ; Wed, 17 May 2017 04:58:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:subject:date:message-id:mime-version; bh=CJIW9tOMkwNy0vmnMuMcFEvGDAUHYniz8QjPKyYz8PE=; b=V1kjvJnGjWc/XoyMy8vY59P6smBcFCTRMiVeX7AjkCZ5zNXuFB8EG5X+owr/XQ30e8 w1htMRO6XgPheDH29JCuVPiItg1uVXPbYCrN0YEEOH9kg9QsHCNIaT2vUE1pcFsvC8gv mYd/sMYsXIYuVzvndFrtl0xiYNMG4tvGtSoADsYH3SAcJn6ARCFaXwbM90eQmUYeVhqc 1UiAE3LoFutyYZOA2CrvX50cd0JBDyAnt5cCLO4Sv6hxA43BcI/WWtz2KRLCLZeGWHOf A75kZ0laq7NewsX8RqGrmGT17nNYTDSvUI4Rn9N7HhQC5D3W8/h4DH60qCO0AwU7lA+c HRqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:subject:date:message-id :mime-version; bh=CJIW9tOMkwNy0vmnMuMcFEvGDAUHYniz8QjPKyYz8PE=; b=Z8/vmV9oH5pajufPg/6qhmrozBzvmbE6MtMHOjFSUNXJQ2aSlNFZuTmEVFoT0rQOu0 mquLZE4sS0Qt2s+WiVhiyXT2jVBHHqj4o1ONWks2jUc3KRbrU3dVJmcrOqY0YUnkAxzG dqSialiRdBThwjMmlrjqegOrVEGymjxN7VThltnDJRNLhQZ5ceUiLjyARoqheD7gL80a ZOkDExMwhXAsuH1AP8YLEENXOZ/PLVazbFRYM/tPFx9QtO+vrQTSZVJl+/vY66/pG/9i E1Dzsp8iOr/mRSMseHVNM4igksR+ZfgKUVYylI0XFKhjH2ULRotOEAlSwgr5nJgCPy1n WZIg== X-Gm-Message-State: AODbwcBkm6j/zqemeR1TcTcAkqUVZd2FP8tq4nxBUr8179WZdqHSV8u9 JirNUZl1ZWLq6GZd X-Received: by 10.36.137.213 with SMTP id s204mr3494501itd.64.1495022275435; Wed, 17 May 2017 04:57:55 -0700 (PDT) Received: from zony ([45.2.7.65]) by smtp.googlemail.com with ESMTPSA id b69sm1036988itb.23.2017.05.17.04.57.53 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 17 May 2017 04:57:54 -0700 (PDT) From: npostavs@users.sourceforge.net To: control@debbugs.gnu.org Subject: control message for bug #8711 - unused vars in cl-destructuring-bind Date: Wed, 17 May 2017 07:59:30 -0400 Message-ID: <87k25fiti5.fsf@users.sourceforge.net> MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.7 (/) X-Debbugs-Envelope-To: control X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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 (/) forcemerge 8711 26960 quit From debbugs-submit-bounces@debbugs.gnu.org Sun May 08 08:34:02 2022 Received: (at 26960) by debbugs.gnu.org; 8 May 2022 12:34:02 +0000 Received: from localhost ([127.0.0.1]:53625 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nng6s-0002FO-8e for submit@debbugs.gnu.org; Sun, 08 May 2022 08:34:02 -0400 Received: from quimby.gnus.org ([95.216.78.240]:58714) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nng6q-0002Ep-FI; Sun, 08 May 2022 08:34:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=zwJWhz3b7cjiE72Val0Z80xctSspr5cXCYgN3zUaIN8=; b=PsHpgYw736VzwCvHIXgY1WN8i9 S4u5/Ug4zmtt9qXH6wpY2aSWk/zHY/9L3SWrTTF7r0W/vzcf3PrDngFdQaflCQg0jxH2IYEMmk4d1 AVpEzKQw8uRKBwB1cdNCdgUxtajrZuntyNztZbcCMrUZ8dXaFLTM/ZfK1/gfVCK6dPsU=; Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nng6g-0008QD-6s; Sun, 08 May 2022 14:33:52 +0200 From: Lars Ingebrigtsen To: Helmut Eller Subject: Re: bug#26960: 26.0.50; Complaints about unused variable in cl-destructuring-bind References: X-Now-Playing: Adult.'s _Becoming Undone_: "Undoing-Undone" Date: Sun, 08 May 2022 14:33:49 +0200 In-Reply-To: (Helmut Eller's message of "Sat, 21 May 2011 20:44:18 +0200") Message-ID: <871qx4i4pe.fsf@gnus.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Helmut Eller writes: > There seems be no way to avoid a warning in code like this: > > ;; -*- lexical-binding: t -*- > (eval-when-compile (require 'cl)) > (defun foo (x) (destructuring-bind (_) x)) > (defun bar (x) (destr [...] Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 26960 Cc: 26960@debbugs.gnu.org, 8711@debbugs.gnu.org, Stefan Monnier X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) Helmut Eller writes: > There seems be no way to avoid a warning in code like this: > > ;; -*- lexical-binding: t -*- > (eval-when-compile (require 'cl)) > (defun foo (x) (destructuring-bind (_) x)) > (defun bar (x) (destructuring-bind (_) x (ignore _))) > > In foo the compiler complains because _ is never used and > it bar it complains because it is used. (I'm going through old bug reports that unfortunately weren't resolved at the time.) I can reproduce this in Emacs 25.1, but not in Emacs 29. That is, there's no warning for `foo'. There's still a warning for `bar', but that's correct, isn't it? `ignore' is just a normal function, so _ is used there. However, this example from a merged bug report is giving a warning: > ;;; -*- lexical-binding: t; -*- > (require 'cl-lib) > (cl-destructuring-bind (&whole a b &rest _) '(1 2) > (print (list a b))) And that seems like a bug? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no From debbugs-submit-bounces@debbugs.gnu.org Sun May 08 09:32:13 2022 Received: (at 26960) by debbugs.gnu.org; 8 May 2022 13:32:13 +0000 Received: from localhost ([127.0.0.1]:53716 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nnh1B-000888-27 for submit@debbugs.gnu.org; Sun, 08 May 2022 09:32:13 -0400 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:64218) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nnh18-00087o-5k; Sun, 08 May 2022 09:32:11 -0400 Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 7DD0910029F; Sun, 8 May 2022 09:32:04 -0400 (EDT) Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 6EC12100118; Sun, 8 May 2022 09:32:02 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1652016722; bh=bwEaiuLPK3lfPJ7EMHW9+8gUMfFgpddY1m+lLaIo3nk=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=ZLqO3HDStwGn35NYJEbil16JU1q3gC7aQwXGfjaVAr7UTvwtQVz7aws0S0pqQIvbA TJESaTJ8WHUzVvwnPAC6fJ6pV0LLbO1Fd9dUM61mbt4iIIDvF05vSHpruvswL4IXds oiKFpXHO6Zz6h9HFVfNjE8isK1xtyRTCOkrfGCzm4LHKDlkgH9riuSWP+EYNqiEU1N cnI421FyFDXM2/zdSPgrL1Y9v+lulkgA9kkhFEbxYS6EF5CSPPxeaQl0/kqRqCsQCF iX+zNzg3XlcrtdaUkPFfjekSk+I9iEEFSW/ukeoyDlmTHJWMI9Rt7+Z6fHGG0UK+cy roA94U/Icz2HQ== Received: from pastel (unknown [45.72.221.51]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 399BF120263; Sun, 8 May 2022 09:32:02 -0400 (EDT) From: Stefan Monnier To: Lars Ingebrigtsen Subject: Re: bug#26960: 26.0.50; Complaints about unused variable in cl-destructuring-bind Message-ID: References: <871qx4i4pe.fsf@gnus.org> Date: Sun, 08 May 2022 09:32:01 -0400 In-Reply-To: <871qx4i4pe.fsf@gnus.org> (Lars Ingebrigtsen's message of "Sun, 08 May 2022 14:33:49 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.044 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain T_SCC_BODY_TEXT_LINE -0.01 - X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 26960 Cc: 26960@debbugs.gnu.org, 8711@debbugs.gnu.org, Helmut Eller X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) > I can reproduce this in Emacs 25.1, but not in Emacs 29. That is, > there's no warning for `foo'. There's still a warning for `bar', but > that's correct, isn't it? Yes. > `ignore' is just a normal function, so _ is used there. It's not 100% normal, but yes. > However, this example from a merged bug report is giving a warning: > >> ;;; -*- lexical-binding: t; -*- >> (require 'cl-lib) >> (cl-destructuring-bind (&whole a b &rest _) '(1 2) >> (print (list a b))) > > And that seems like a bug? Indeed. If you look at the macroexpanded code, you see that `cl-destructuring-bind` uses: (let* ((_ '(1 2)) (a _) (b (if _ (pop _) (signal 'wrong-number-of-arguments (list '(&whole a b &rest _) (length _)))))) (print (list a b))) so, you can see that the problem is that `cl-destructuring-bind` tries to avoid using gensym and "abuses" the &rest var as the "iterator" variable while parsing the list. It might have been useful back in the dynbinding days because `setq` might have been a bit cheaper than `let`, but with lexical scoping `let` byte-compiles to virtually nothing. Stefan From debbugs-submit-bounces@debbugs.gnu.org Mon May 09 05:25:50 2022 Received: (at 26960) by debbugs.gnu.org; 9 May 2022 09:25:51 +0000 Received: from localhost ([127.0.0.1]:56062 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nnzeI-0008Nr-M0 for submit@debbugs.gnu.org; Mon, 09 May 2022 05:25:50 -0400 Received: from quimby.gnus.org ([95.216.78.240]:39618) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nnzeH-0008NW-Ir; Mon, 09 May 2022 05:25:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID :In-Reply-To:Date:References:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=mZKvtBIvk6H/f9vVa1qQLTrd3tsHAwO9bgLUg4Xy9Aw=; b=MBCfrFz7TwJZYUxVO9ViY6C7Rj shFnhW7FW8/RUEjCAmb5T9xyqGsozlzKJDt2h6+fbiq4FeWlle+Fw8uwkkZtvdVup4eMibklUJfR4 KWGs4RCjFQtkyxpWx1NCSR350M5IQ27VZ6bLL7rS3HwMlN10myBcRz/gQljVYbSQeUGM=; Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nnze7-0003uA-Eu; Mon, 09 May 2022 11:25:41 +0200 From: Lars Ingebrigtsen To: Stefan Monnier Subject: Re: bug#26960: 26.0.50; Complaints about unused variable in cl-destructuring-bind References: <871qx4i4pe.fsf@gnus.org> Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAElBMVEXZcnO+sKni39L2 9etsd4H////mjpy1AAAAAWJLR0QF+G/pxwAAAAd0SU1FB+YFCQkSKPuxcWMAAAG0SURBVDjLlVTr mdwgDCQdBOEGJNEA0jaAc/3XlBFgw92XP5HX2IsYafRySv8tv/OQ9XjlV1JVdzd3HSse8W6exIZm Ksc+dtUlCTYEu/Fv7ONFzSSp+BbolmmDD/MfEgY06Tr5TcJ5E1EWiOEOZvOQpQrSXzn3D+7rtkXO PcVpB+cAySRt4SYxEyuzs+TMpI9DTWaHc30SoD5ZBY1xhaEZWPIXccAsTL08vokl8X3aTsU/I/fI 7hQb63ajI0AIk+Ci08eJkJ8Ijh+ywg8HtTSOcu1sdiBQqDZM1BtE6FVEoaZz7sIWWV5kgeCFsABs hG+EHqbMtymlQVd95XnFUTuWhQg/oo/itgz39Jp6fAwEMLskCPDrlV3yKNShOCIfpkj804t5zju7 GINK3Ap8cMm0GzyS2Mjpc9ufpsHqGZYkrNr40/Nt5ZJVdgmFFapeu3qz8rbMyK42LQiwtGKku4IN GvKG7HZq9KQw0l6ICl+3V21FxjjNUUN/AHPdVY0LH3RhioQ5anfNJGKWo9tZHRbMLAwdPQpWTCgE X9yNeIzBkGREu+EKjvL8mKQop8YHAeOqUD+Kv6HCuLBZHCH4AAAAJXRFWHRkYXRlOmNyZWF0ZQAy MDIyLTA1LTA5VDA5OjE4OjQwKzAwOjAwELu3MAAAACV0RVh0ZGF0ZTptb2RpZnkAMjAyMi0wNS0w OVQwOToxODo0MCswMDowMGHmD4wAAAAASUVORK5CYII= X-Now-Playing: Blaine L. Reininger & Alain Goutier's _Paris en Autumne_: "Raise Your Hands" Date: Mon, 09 May 2022 11:25:38 +0200 In-Reply-To: (Stefan Monnier's message of "Sun, 08 May 2022 09:32:01 -0400") Message-ID: <8735hjdpm5.fsf@gnus.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Stefan Monnier writes: > Indeed. If you look at the macroexpanded code, you see that > `cl-destructuring-bind` uses: > > (let* ((_ '(1 2)) > (a _) > (b (if _ (pop _) > (signal 'wrong-number-of-arguments > (list '(&whole a b [...] Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 26960 Cc: 26960@debbugs.gnu.org, 8711@debbugs.gnu.org, Helmut Eller X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) Stefan Monnier writes: > Indeed. If you look at the macroexpanded code, you see that > `cl-destructuring-bind` uses: > > (let* ((_ '(1 2)) > (a _) > (b (if _ (pop _) > (signal 'wrong-number-of-arguments > (list '(&whole a b &rest _) (length _)))))) > (print (list a b))) > > so, you can see that the problem is that `cl-destructuring-bind` tries > to avoid using gensym and "abuses" the &rest var as the "iterator" > variable while parsing the list. Hm, right. I had a quick peek at `cl--do-arglist' (which I guess is what's creating this form), and... I think I'll leave this for somebody else to fix. =F0= =9F=AB=A0 In any case, I'm unmerging these two bug reports, and closing the one that's fixed. --=20 (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no From debbugs-submit-bounces@debbugs.gnu.org Mon May 09 05:26:30 2022 Received: (at control) by debbugs.gnu.org; 9 May 2022 09:26:30 +0000 Received: from localhost ([127.0.0.1]:56069 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nnzeq-0008PF-5V for submit@debbugs.gnu.org; Mon, 09 May 2022 05:26:29 -0400 Received: from quimby.gnus.org ([95.216.78.240]:39636) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nnzeo-0008P3-JD for control@debbugs.gnu.org; Mon, 09 May 2022 05:26:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Subject:From:To:Message-Id:Date:Sender:Reply-To:Cc: MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=9SdV9JnKn2PInxVbm8eeIkpfvUSOwWSTigc6GkYT5qw=; b=Hp+VmODtrn/q2s+dF3l5m29Oia Le6T1kCZlWRdpEJnD4CbYY/N+S3Y9c0O8meKKJX0pPNyTfLE7WBICXERvjowE+47Gqn/SNx1xbIfz qm80k0pZbgZs6/QL6A3ieL5aL+DDJ0kGv04mpNRPLX6oDwzBeYSybP05YsGKMI5dztwY=; Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nnzeg-0003uW-NL for control@debbugs.gnu.org; Mon, 09 May 2022 11:26:16 +0200 Date: Mon, 09 May 2022 11:26:14 +0200 Message-Id: <871qx3dpl5.fsf@gnus.org> To: control@debbugs.gnu.org From: Lars Ingebrigtsen Subject: control message for bug #26960 X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: unmerge 26960 quit Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: control X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) unmerge 26960 quit From debbugs-submit-bounces@debbugs.gnu.org Mon May 09 08:26:30 2022 Received: (at 26960) by debbugs.gnu.org; 9 May 2022 12:26:30 +0000 Received: from localhost ([127.0.0.1]:56507 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1no2T8-0004E3-Ki for submit@debbugs.gnu.org; Mon, 09 May 2022 08:26:30 -0400 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:21296) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1no2T7-0004Dl-Pa; Mon, 09 May 2022 08:26:30 -0400 Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 5300D80767; Mon, 9 May 2022 08:26:24 -0400 (EDT) Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 038438000B; Mon, 9 May 2022 08:26:23 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1652099183; bh=m+ZgU4RxT2w2/RS4hydurIqIwoohV2dpBDin6xUVbSs=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=mdxxVQCR5VnM4vS2UwMpuLUgia8o8vTvBeGk4PsNHm2y7tdr2qzpSCevAqwOfDVgC RdJBN3xZckIs3FXRZpEx7gOG+3xDwzhH0fayWBgQi8T/Uc9dI54N4ZdA9xj3rJuihQ oWT7H7aoSmga4YQ4+x9OR7KyUriwGmtcc9lCsYjc9YLObBXWk0/+lns1HldHMv67ds +NnE9HLkuFmH8+sfQws5n4UtEcafL8n08gjHcxJzygvdL/jt2e+d6pHY63Mlj2XczD H3UiwQUaQ+7+lZlSIqPMXmzf4kvZVTWGpDEjYgN6ZpvmhIc+uwCK+301QoUUFJj0W9 TbfWIfmBT7KWQ== Received: from pastel (unknown [45.72.221.51]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id A92A612051F; Mon, 9 May 2022 08:26:22 -0400 (EDT) From: Stefan Monnier To: Lars Ingebrigtsen Subject: Re: bug#26960: 26.0.50; Complaints about unused variable in cl-destructuring-bind Message-ID: References: <871qx4i4pe.fsf@gnus.org> <8735hjdpm5.fsf@gnus.org> Date: Mon, 09 May 2022 08:26:21 -0400 In-Reply-To: <8735hjdpm5.fsf@gnus.org> (Lars Ingebrigtsen's message of "Mon, 09 May 2022 11:25:38 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.057 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain T_SCC_BODY_TEXT_LINE -0.01 - X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 26960 Cc: 26960@debbugs.gnu.org, 8711@debbugs.gnu.org, Helmut Eller X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) > I had a quick peek at `cl--do-arglist' (which I guess is what's creating > this form), and... I think I'll leave this for somebody else to fix. = =F0=9F=AB=A0 I did the same some years ago, FWIW :-) Stefan