From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Glenn Morris Newsgroups: gmane.emacs.bugs Subject: bug#15059: 24.3; nth with negative index values Date: Fri, 09 Aug 2013 14:52:29 -0400 Message-ID: <33vc3er91u.fsf@fencepost.gnu.org> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1376074388 27266 80.91.229.3 (9 Aug 2013 18:53:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 9 Aug 2013 18:53:08 +0000 (UTC) Cc: 15059@debbugs.gnu.org To: Wilfred Hughes Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Aug 09 20:53:09 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 1V7roC-000155-5L for geb-bug-gnu-emacs@m.gmane.org; Fri, 09 Aug 2013 20:53:08 +0200 Original-Received: from localhost ([::1]:46785 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V7roB-0003RX-LP for geb-bug-gnu-emacs@m.gmane.org; Fri, 09 Aug 2013 14:53:07 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57504) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V7ro7-0003RO-Oc for bug-gnu-emacs@gnu.org; Fri, 09 Aug 2013 14:53:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V7ro6-0007Wq-Tz for bug-gnu-emacs@gnu.org; Fri, 09 Aug 2013 14:53:03 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55949) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V7ro6-0007Wm-QQ for bug-gnu-emacs@gnu.org; Fri, 09 Aug 2013 14:53:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1V7ro6-0008K2-EU for bug-gnu-emacs@gnu.org; Fri, 09 Aug 2013 14:53:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Glenn Morris Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 09 Aug 2013 18:53:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15059 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 15059-submit@debbugs.gnu.org id=B15059.137607435531948 (code B ref 15059); Fri, 09 Aug 2013 18:53:02 +0000 Original-Received: (at 15059) by debbugs.gnu.org; 9 Aug 2013 18:52:35 +0000 Original-Received: from localhost ([127.0.0.1]:50265 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1V7rnf-0008JC-7r for submit@debbugs.gnu.org; Fri, 09 Aug 2013 14:52:35 -0400 Original-Received: from fencepost.gnu.org ([208.118.235.10]:44262 ident=Debian-exim) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1V7rna-0008J0-V9 for 15059@debbugs.gnu.org; Fri, 09 Aug 2013 14:52:34 -0400 Original-Received: from rgm by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1V7rnZ-0003Y4-V4; Fri, 09 Aug 2013 14:52:29 -0400 X-Spook: UOP ANZUS MDA Islam Abduganievich Karimov JFK Merlin X-Ran: Q%N`;zg)V9&V]lkxPeG(NBF>js#r$o/.h^:qi}`-s=LWqA3_B,%E3}`@.Km,L_zY]xcRbj X-Hue: magenta X-Attribution: GM In-Reply-To: (Wilfred Hughes's message of "Fri, 9 Aug 2013 12:55:53 +0100") User-Agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/) 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:77215 Archived-At: Wilfred Hughes wrote: > (nth -1 '(5 6 7)) ;; 5 > (nth -2 '(5 6 7)) ;; 5 > > Judging by my reading of the docstring, I was expecting nil (though > raising an error might be a sensible behaviour instead). Easy to raise an error (unless something was relying on the behaviour for -ve arguments?): *** src/fns.c 2013-08-01 22:24:02 +0000 --- src/fns.c 2013-08-09 18:43:02 +0000 *************** *** 1277,1283 **** (Lisp_Object n, Lisp_Object list) { EMACS_INT i, num; ! CHECK_NUMBER (n); num = XINT (n); for (i = 0; i < num && !NILP (list); i++) { --- 1277,1283 ---- (Lisp_Object n, Lisp_Object list) { EMACS_INT i, num; ! CHECK_NATNUM (n); num = XINT (n); for (i = 0; i < num && !NILP (list); i++) {