From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: about "assignment to free variable" Date: Tue, 05 Feb 2019 08:56:06 -0500 Message-ID: References: <87munaelia.fsf@mugno.i-did-not-set--mail-host-address--so-tickle-me> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="150495"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Feb 05 14:57:31 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1gr1EB-000d21-0t for ged-emacs-devel@m.gmane.org; Tue, 05 Feb 2019 14:57:31 +0100 Original-Received: from localhost ([127.0.0.1]:60741 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gr1EA-0008Ay-3H for ged-emacs-devel@m.gmane.org; Tue, 05 Feb 2019 08:57:30 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:57661) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gr1D0-0007aT-Dk for emacs-devel@gnu.org; Tue, 05 Feb 2019 08:56:19 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gr1Cz-0008RG-J9 for emacs-devel@gnu.org; Tue, 05 Feb 2019 08:56:18 -0500 Original-Received: from [195.159.176.226] (port=37082 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gr1Cz-0008Qu-C4 for emacs-devel@gnu.org; Tue, 05 Feb 2019 08:56:17 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.89) (envelope-from ) id 1gr1Ct-000bP4-WE for emacs-devel@gnu.org; Tue, 05 Feb 2019 14:56:12 +0100 X-Injected-Via-Gmane: http://gmane.org/ Cancel-Lock: sha1:jNlQIbQaCBrPpY4aoHp7BjLpfXw= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:232991 Archived-At: > When i compile a piece of code the byte-compiler reports a warning > telling me that i'm trying to assign to a free variable: > But the variable in question is, atleast i think, referred to a local > variable because it is an argument of the function. I think your "at least I think" is in error. But you'd have to show me the relevant code. "*free* variable" doesn't mean "a variable which will not exist when this code is run" but "a variable which is not visible in the surrounding scope". > The code works fine even if compiled. Until it doesn't. > If it is necessary i can post the code, even if it is large. Pointing me to the relevant file+linenb should be sufficient. Stefan