From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Thierry Volpiatto Newsgroups: gmane.emacs.bugs Subject: bug#15139: 24.3; Error in section 11.9.3 of the Elisp Reference Manual Date: Tue, 20 Aug 2013 13:08:31 +0200 Organization: Emacs Helm Message-ID: <877gfgpqkw.fsf@gmail.com> References: <87mwochhct.fsf@fastmail.co.uk> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1376998042 6351 80.91.229.3 (20 Aug 2013 11:27:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 20 Aug 2013 11:27:22 +0000 (UTC) To: 15139@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Aug 20 13:27:23 2013 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 1VBk5q-0004Kp-1S for geb-bug-gnu-emacs@m.gmane.org; Tue, 20 Aug 2013 13:27:22 +0200 Original-Received: from localhost ([::1]:47131 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VBk5p-0000JZ-FG for geb-bug-gnu-emacs@m.gmane.org; Tue, 20 Aug 2013 07:27:21 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:49062) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VBk5e-0000IT-Hg for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 07:27:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VBk5W-0007zN-Hw for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 07:27:10 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:47858) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VBk5W-0007zI-FB for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 07:27:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1VBk5W-0001tR-5P for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 07:27:02 -0400 X-Loop: help-debbugs@gnu.org In-Reply-To: <87mwochhct.fsf@fastmail.co.uk> Resent-From: Thierry Volpiatto Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 20 Aug 2013 11:27:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15139 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.13769979977240 (code B ref -1); Tue, 20 Aug 2013 11:27:02 +0000 Original-Received: (at submit) by debbugs.gnu.org; 20 Aug 2013 11:26:37 +0000 Original-Received: from localhost ([127.0.0.1]:42173 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VBk56-0001sh-LR for submit@debbugs.gnu.org; Tue, 20 Aug 2013 07:26:36 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:47092) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VBk53-0001sY-45 for submit@debbugs.gnu.org; Tue, 20 Aug 2013 07:26:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VBk4v-0007nM-Qv for submit@debbugs.gnu.org; Tue, 20 Aug 2013 07:26:32 -0400 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:48988) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VBk4v-0007n7-P1 for submit@debbugs.gnu.org; Tue, 20 Aug 2013 07:26:25 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:48738) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VBk4p-0000G0-Fh for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 07:26:25 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VBk4j-0007kG-AQ for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 07:26:19 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:42836) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VBjno-00016U-HP for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 07:08:44 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1VBjnm-0001BP-9x for bug-gnu-emacs@gnu.org; Tue, 20 Aug 2013 13:08:42 +0200 Original-Received: from 37.161.91.32 ([37.161.91.32]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 20 Aug 2013 13:08:42 +0200 Original-Received: from thierry.volpiatto by 37.161.91.32 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 20 Aug 2013 13:08:42 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 32 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 37.161.91.32 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) Cancel-Lock: sha1:rVnvUgr79lz5US2KFxAnPCpxPog= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). 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:77539 Archived-At: Sian Mountbatten writes: > In section 11.9.3 Lexical Binding of the Elisp Reference Manual, the > following forms are given: > > (defvar my-ticker nil) ; comment > > (let ((x 0)) > (setq my-ticker (lambda () > (setq x (1+ x))))) > > (funcall my-ticker) > > The manual says that the 3rd form (funcall...) yields `1'. When these > forms are evaluated using C-xC-e, the 3rd form enters the debugger with > the error `void variable x'. The manual is speaking of lexical binding, try this or use the code above in a lexical-binding environment: (defvar my-ticker nil) ; comment (lexical-let ((x 0)) (setq my-ticker (lambda () (setq x (1+ x))))) (funcall my-ticker) -- Thierry Get my Gnupg key: gpg --keyserver pgp.mit.edu --recv-keys 59F29997