From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#35557: 26.1; false positive: Match data clobbered by buffer modification hooks Date: Sun, 5 May 2019 22:03:08 -0700 Organization: UCLA Computer Science Department Message-ID: <64899525-fd17-c715-dff4-b99996717f4f@cs.ucla.edu> References: <87o94ih2oy.fsf@tethera.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="25172"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 Cc: 35557@debbugs.gnu.org To: David Bremner Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon May 06 07:04:27 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hNVnd-0006Mr-LS for geb-bug-gnu-emacs@m.gmane.org; Mon, 06 May 2019 07:04:25 +0200 Original-Received: from localhost ([127.0.0.1]:50454 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hNVnc-0002EG-EZ for geb-bug-gnu-emacs@m.gmane.org; Mon, 06 May 2019 01:04:24 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:44722) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hNVnN-0002Ds-O0 for bug-gnu-emacs@gnu.org; Mon, 06 May 2019 01:04:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hNVnM-0006bS-Fd for bug-gnu-emacs@gnu.org; Mon, 06 May 2019 01:04:09 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:41962) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hNVnG-0006Yq-J8 for bug-gnu-emacs@gnu.org; Mon, 06 May 2019 01:04:07 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1hNVnG-0007uo-C9 for bug-gnu-emacs@gnu.org; Mon, 06 May 2019 01:04:02 -0400 X-Loop: help-debbugs@gnu.org In-Reply-To: <87o94ih2oy.fsf@tethera.net> Resent-From: Paul Eggert Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 06 May 2019 05:04:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 35557 X-GNU-PR-Package: emacs Original-Received: via spool by 35557-submit@debbugs.gnu.org id=B35557.155711899830368 (code B ref 35557); Mon, 06 May 2019 05:04:02 +0000 Original-Received: (at 35557) by debbugs.gnu.org; 6 May 2019 05:03:18 +0000 Original-Received: from localhost ([127.0.0.1]:55506 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hNVmY-0007tj-6b for submit@debbugs.gnu.org; Mon, 06 May 2019 01:03:18 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:53250) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hNVmV-0007tU-NM for 35557@debbugs.gnu.org; Mon, 06 May 2019 01:03:16 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id AB9C51618F1; Sun, 5 May 2019 22:03:09 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id Zec4_-Gqp_W5; Sun, 5 May 2019 22:03:09 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 10BD4161924; Sun, 5 May 2019 22:03:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id Te0rgztqsra2; Sun, 5 May 2019 22:03:08 -0700 (PDT) Original-Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id E36861618E2; Sun, 5 May 2019 22:03:08 -0700 (PDT) Content-Language: en-US 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: 209.51.188.43 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:158824 Archived-At: I tried to reproduce the bug and failed, so I'm afraid you'll have to step in and help debug it. First, please use 26.2 rather than 26.1. Second, please simplify the ./configure arguments (there are some duplicates, and --enable-libsystemd isn't the right name for the flag). Third, I suggest running it under GDB and seeing what exactly goes wrong, e.g., by putting a watchpoint on search_regs.start[sub].