From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#19734: 25.0.50; nested backquotes: recent changes not backward compatible Date: Fri, 30 Jan 2015 16:01:55 -0500 Message-ID: References: <871tmcrwe7.fsf@web.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1422651799 18145 80.91.229.3 (30 Jan 2015 21:03:19 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 30 Jan 2015 21:03:19 +0000 (UTC) Cc: 19734-done@debbugs.gnu.org To: Michael Heerdegen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Jan 30 22:03:14 2015 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YHIig-0001mO-3x for geb-bug-gnu-emacs@m.gmane.org; Fri, 30 Jan 2015 22:03:14 +0100 Original-Received: from localhost ([::1]:38627 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YHIif-00014y-GQ for geb-bug-gnu-emacs@m.gmane.org; Fri, 30 Jan 2015 16:03:13 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55326) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YHIiY-000130-5s for bug-gnu-emacs@gnu.org; Fri, 30 Jan 2015 16:03:10 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YHIiU-0007lg-V7 for bug-gnu-emacs@gnu.org; Fri, 30 Jan 2015 16:03:06 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:38817) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YHIiU-0007lY-T1 for bug-gnu-emacs@gnu.org; Fri, 30 Jan 2015 16:03:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1YHIiU-0005Z4-KO for bug-gnu-emacs@gnu.org; Fri, 30 Jan 2015 16:03:02 -0500 Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-To: bug-gnu-emacs@gnu.org Resent-Date: Fri, 30 Jan 2015 21:03:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: cc-closed 19734 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Mail-Followup-To: 19734@debbugs.gnu.org, monnier@iro.umontreal.ca, michael_heerdegen@web.de Original-Received: via spool by 19734-done@debbugs.gnu.org id=D19734.142265174621335 (code D ref 19734); Fri, 30 Jan 2015 21:03:02 +0000 Original-Received: (at 19734-done) by debbugs.gnu.org; 30 Jan 2015 21:02:26 +0000 Original-Received: from localhost ([127.0.0.1]:58288 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YHIhu-0005Y2-8v for submit@debbugs.gnu.org; Fri, 30 Jan 2015 16:02:26 -0500 Original-Received: from mercure.iro.umontreal.ca ([132.204.24.67]:47167) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YHIhs-0005Xu-97 for 19734-done@debbugs.gnu.org; Fri, 30 Jan 2015 16:02:24 -0500 Original-Received: from hidalgo.iro.umontreal.ca (hidalgo.iro.umontreal.ca [132.204.27.50]) by mercure.iro.umontreal.ca (Postfix) with ESMTP id 5CDA985EC6; Fri, 30 Jan 2015 16:02:23 -0500 (EST) Original-Received: from lechon.iro.umontreal.ca (lechon.iro.umontreal.ca [132.204.27.242]) by hidalgo.iro.umontreal.ca (Postfix) with ESMTP id E9B7B1E5B8D; Fri, 30 Jan 2015 16:01:55 -0500 (EST) Original-Received: by lechon.iro.umontreal.ca (Postfix, from userid 20848) id C7A29B4102; Fri, 30 Jan 2015 16:01:55 -0500 (EST) In-Reply-To: <871tmcrwe7.fsf@web.de> (Michael Heerdegen's message of "Fri, 30 Jan 2015 18:49:52 +0100") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-DIRO-MailScanner-Information: Please contact the ISP for more information X-DIRO-MailScanner: Found to be clean X-DIRO-MailScanner-SpamCheck: n'est pas un polluriel, SpamAssassin (score=-2.82, requis 5, autolearn=not spam, ALL_TRUSTED -2.82, MC_TSTLAST 0.00) X-DIRO-MailScanner-From: monnier@iro.umontreal.ca X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:98915 Archived-At: > * lisp/emacs-lisp/backquote.el (backquote-process): Optimize away > the ,' case. > were not backwards compatible. If this was intended (?), it should be > mentioned in the news I think. As the commit message indicates, this was supposed to be an optimization, i.e. no change in observable behavior. > In trunk, the backquote expression evals to something different now, and > ,,'(my-make-feh-cmd) > from above must now be > ,(my-make-feh-cmd) Yes, your rewrite is correct and desirable, but indeed we had a bug which I've just fixed in master. Thanks. Stefan