From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#49749: 26.3; 26.3 & 27.2: invalid byte compiler warning in short-circuited or form Date: Wed, 28 Jul 2021 17:26:24 +0200 Message-ID: <8735rycvdr.fsf@gnus.org> References: <1B5C81C0-5D9A-4ED5-B56A-FC6AAA1A8A87@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="34621"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 49749@debbugs.gnu.org To: Pierre Rouleau Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jul 28 17:27:11 2021 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 1m8lSh-0008pE-F3 for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 28 Jul 2021 17:27:11 +0200 Original-Received: from localhost ([::1]:49610 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m8lSg-0006qd-Dy for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 28 Jul 2021 11:27:10 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45854) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m8lSY-0006q3-4X for bug-gnu-emacs@gnu.org; Wed, 28 Jul 2021 11:27:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:44071) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m8lSX-0006mI-T7 for bug-gnu-emacs@gnu.org; Wed, 28 Jul 2021 11:27:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1m8lSX-00049r-N6 for bug-gnu-emacs@gnu.org; Wed, 28 Jul 2021 11:27:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 28 Jul 2021 15:27:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 49749 X-GNU-PR-Package: emacs Original-Received: via spool by 49749-submit@debbugs.gnu.org id=B49749.162748599615932 (code B ref 49749); Wed, 28 Jul 2021 15:27:01 +0000 Original-Received: (at 49749) by debbugs.gnu.org; 28 Jul 2021 15:26:36 +0000 Original-Received: from localhost ([127.0.0.1]:55614 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m8lS7-00048u-U6 for submit@debbugs.gnu.org; Wed, 28 Jul 2021 11:26:36 -0400 Original-Received: from quimby.gnus.org ([95.216.78.240]:48958) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m8lS6-00048e-Bk for 49749@debbugs.gnu.org; Wed, 28 Jul 2021 11:26:34 -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=6+A2bxi1I6tdGXeMyIAsPZpZFwrNHQbXPboOu2J4yhc=; b=fIKibv4NG1JIWdFFI9n0cE70rn m/tcnCE3PB42B0Gycx8731x57Nh9dQ8Q59VMjgVtNzPorGXMilLjkEd+yHaFtP7lqn63OogpVBRUh J7gOpV6yVUThqh6ERLEO+4UGZGlQl54xoJEaMT2/seEplXynV5EQbU67oY2AJNJKixFk=; Original-Received: from 2.149.45.105.tmi.telenormobil.no ([2.149.45.105] helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m8lRx-0000vK-Er; Wed, 28 Jul 2021 17:26:27 +0200 In-Reply-To: <1B5C81C0-5D9A-4ED5-B56A-FC6AAA1A8A87@gmail.com> (Pierre Rouleau's message of "Tue, 27 Jul 2021 14:54:14 -0400") 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" Xref: news.gmane.io gmane.emacs.bugs:210819 Archived-At: Pierre Rouleau writes: > (defun f-or () > "Use or." > (when (or (null (boundp 'foo)) > (null foo)) ;=3D> ``Warning: reference to free variable =E2= =80=98foo=E2=80=99``=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20 > (message "foo is not set"))) The message about invalid stuff is only discarded if Emacs is trivially able to deduce that it'll never be evaluated -- and as you've found out, it's easy to make that heuristic not be heeded (see `byte-compile-maybe-guarded' for details). So I'm not sure this is a bug -- Emacs can't determine all cases where we won't be executing the code in question at compile time. Anybody else think that this is something that should be improved? --=20 (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no