From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Noam Postavsky Newsgroups: gmane.emacs.bugs Subject: bug#5950: defvaralias after defvar should be warned in runtime Date: Thu, 2 Aug 2018 09:28:51 -0400 Message-ID: References: <4BC6A096.8030801@yahoo.co.jp> <87r5gu34ag.wl%irieshinsuke@yahoo.co.jp> <3keicu1h3v.fsf@fencepost.gnu.org> <874liufjfj.fsf@gmail.com> <871sdyezwl.fsf@gmail.com> <87vaaoxm1z.fsf@gmail.com> <8e11e15a-a806-777e-1b18-3db9000c77de@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1533216431 19771 195.159.176.226 (2 Aug 2018 13:27:11 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 2 Aug 2018 13:27:11 +0000 (UTC) Cc: IRIE Shinsuke , 5950@debbugs.gnu.org, Stefan Monnier To: =?UTF-8?Q?Cl=C3=A9ment?= Pit-Claudel Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Aug 02 15:27:06 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1flDdB-0004zA-RM for geb-bug-gnu-emacs@m.gmane.org; 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Thu, 02 Aug 2018 06:28:52 -0700 (PDT) Original-Received: by 2002:a9d:3495:0:0:0:0:0 with HTTP; Thu, 2 Aug 2018 06:28:51 -0700 (PDT) In-Reply-To: <8e11e15a-a806-777e-1b18-3db9000c77de@gmail.com> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:149202 Archived-At: On 2 August 2018 at 09:08, Cl=C3=A9ment Pit-Claudel = wrote: >> Usually the warning is due to the defvaralias call being performed after >> the corresponding `defvar`s. > > Right. But why is that a problem? The typical failure case goes like this, user does this: (setq the-package-setting 'foo) (require 'the-package) And the-package.el does this: (defvar the-package-real-setting 'bar) ;; Oops! User's setting of `foo' is overwritten here: (defvaralias 'the-package-setting 'the-package-real-setting) See Bug#31603 for a real life example. https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D31603