From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21736 invoked from network); 25 Jul 2007 04:52:50 -0000 X-Spam-Checker-Version: SpamAssassin 3.2.1 (2007-05-02) on f.primenet.com.au X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=3.2.1 Received: from news.dotsrc.org (HELO a.mx.sunsite.dk) (130.225.247.88) by ns1.primenet.com.au with SMTP; 25 Jul 2007 04:52:50 -0000 Received-SPF: none (ns1.primenet.com.au: domain at sunsite.dk does not designate permitted sender hosts) Received: (qmail 73003 invoked from network); 25 Jul 2007 04:52:43 -0000 Received: from sunsite.dk (130.225.247.90) by a.mx.sunsite.dk with SMTP; 25 Jul 2007 04:52:43 -0000 Received: (qmail 1640 invoked by alias); 25 Jul 2007 04:52:41 -0000 Mailing-List: contact zsh-workers-help@sunsite.dk; run by ezmlm Precedence: bulk X-No-Archive: yes X-Seq: 23695 Received: (qmail 1631 invoked from network); 25 Jul 2007 04:52:40 -0000 Received: from news.dotsrc.org (HELO a.mx.sunsite.dk) (130.225.247.88) by sunsite.dk with SMTP; 25 Jul 2007 04:52:40 -0000 Received: (qmail 72778 invoked from network); 25 Jul 2007 04:52:40 -0000 Received: from vms046pub.verizon.net (206.46.252.46) by a.mx.sunsite.dk with SMTP; 25 Jul 2007 04:52:37 -0000 Received: from torch.brasslantern.com ([71.116.66.200]) by vms046.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0JLP0075WXJBGYN2@vms046.mailsrvcs.net> for zsh-workers@sunsite.dk; Tue, 24 Jul 2007 23:52:24 -0500 (CDT) Received: from torch.brasslantern.com (localhost.localdomain [127.0.0.1]) by torch.brasslantern.com (8.13.1/8.13.1) with ESMTP id l6P4qNKl004904 for ; Tue, 24 Jul 2007 21:52:23 -0700 Received: (from schaefer@localhost) by torch.brasslantern.com (8.13.1/8.13.1/Submit) id l6P4qMZx004903 for zsh-workers@sunsite.dk; Tue, 24 Jul 2007 21:52:22 -0700 Date: Tue, 24 Jul 2007 21:52:22 -0700 From: Bart Schaefer Subject: Memory access bug with negative subscripts To: zsh-workers@sunsite.dk Message-id: <070724215222.ZM4902@torch.brasslantern.com> MIME-version: 1.0 X-Mailer: OpenZMail Classic (0.9.2 24April2005) Content-type: text/plain; charset=us-ascii This bug appears at least as far back as zsh 3.0.5, and probably longer ago. Still happens in the latest CVS co from SourceForge. x=x x[-10]=y print $x I can't predict what you'll see, but unless you get very lucky it won't be what you ought to see. For example, torch% x[-$RANDOM]=z torch% print $x zpasswd I imagine running that under ElectricFence or some similar memory checker would be instructive.