Received: from mail.proteosys.com ([213.139.130.197]) by nummer-3.proteosys with Microsoft SMTPSVC(6.0.3790.3959); Thu, 29 Jan 2009 21:44:17 +0100 Received: by mail.proteosys.com (8.13.8/8.13.8) with ESMTP id n0TKiFYC010380 for ; Thu, 29 Jan 2009 21:44:16 +0100 Received: from listserv.uni-heidelberg.de (listserv.uni-heidelberg.de [129.206.100.94]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id n0TKeSev030619 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 29 Jan 2009 21:40:28 +0100 Received: from listserv.uni-heidelberg.de (localhost.localdomain [127.0.0.1]) by listserv.uni-heidelberg.de (8.13.1/8.13.1) with ESMTP id n0TJ8b0Q027246; Thu, 29 Jan 2009 21:40:18 +0100 Received: by LISTSERV.UNI-HEIDELBERG.DE (LISTSERV-TCP/IP release 15.5) with spool id 203888 for LATEX-L@LISTSERV.UNI-HEIDELBERG.DE; Thu, 29 Jan 2009 21:40:18 +0100 Received: from relay.uni-heidelberg.de (relay.uni-heidelberg.de [129.206.100.212]) by listserv.uni-heidelberg.de (8.13.1/8.13.1) with ESMTP id n0TKeIHn001418 for ; Thu, 29 Jan 2009 21:40:18 +0100 Received: from anchor-post-1.mail.demon.net (anchor-post-1.mail.demon.net [195.173.77.132]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id n0TKe50J029681 for ; Thu, 29 Jan 2009 21:40:09 +0100 Received: from cremornelane.demon.co.uk ([80.177.25.195] helo=[192.168.0.2]) by anchor-post-1.mail.demon.net with esmtp (Exim 4.69) id 1LSdgD-0003Tr-gL for latex-l@listserv.uni-heidelberg.de; Thu, 29 Jan 2009 20:40:05 +0000 User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Message-ID: <4982142F.6090004@morningstar2.co.uk> Date: Thu, 29 Jan 2009 20:40:15 +0000 Reply-To: Mailing list for the LaTeX3 project Sender: Mailing list for the LaTeX3 project From: Joseph Wright Subject: \tlist_head_iii:n "health warning" To: LATEX-L@LISTSERV.UNI-HEIDELBERG.DE Precedence: list List-Help: , List-Unsubscribe: List-Subscribe: List-Owner: List-Archive: X-ProteoSys-SPAM-Score: -2.599 () BAYES_00 X-Scanned-By: MIMEDefang 2.64 on 213.139.130.197 Return-Path: owner-latex-l@LISTSERV.UNI-HEIDELBERG.DE X-OriginalArrivalTime: 29 Jan 2009 20:44:17.0236 (UTC) FILETIME=[5A666940:01C98252] Status: R X-Status: X-Keywords: X-UID: 5641 Hello, It occurs to me that the tlist head functions could do with a health warning. For example, try: \tlist_head_iii:n{1} The documentation doesn't explicitly say that you need to check first that the tlist is sufficiently long. Joseph