From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Alex Newsgroups: gmane.emacs.bugs Subject: bug#25154: 25.1; Bindings in cl-letf are in reverse order Date: Fri, 09 Dec 2016 17:36:15 -0600 Message-ID: <8737hwllow.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1481327719 12491 195.159.176.226 (9 Dec 2016 23:55:19 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 9 Dec 2016 23:55:19 +0000 (UTC) To: 25154@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Dec 10 00:55:12 2016 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 1cFV0O-0001T2-FZ for geb-bug-gnu-emacs@m.gmane.org; Sat, 10 Dec 2016 00:55:08 +0100 Original-Received: from localhost ([::1]:49468 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cFV0S-0001ab-80 for geb-bug-gnu-emacs@m.gmane.org; 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[174.2.107.88]) by smtp.gmail.com with ESMTPSA id 2sm15511557ioz.30.2016.12.09.15.36.23 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 09 Dec 2016 15:36:23 -0800 (PST) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x 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:126785 Archived-At: Compare the following: (let ((x 5) (x 6)) (+ x 10)) => 16 (cl-letf ((x 5) (x 6)) (+ x 10)) => 15 This also occurs when using non-trivial places: (setq v (vector 1 2 3 4 5)) (cl-letf (((aref v 1) 10) ((aref v 1) 20)) (aref v 1)) => 10 I ran into this when using two different setters that sometimes indirectly modify the same variable. The current behaviour makes the result of that unexpected.