From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Kangas Newsgroups: gmane.emacs.bugs Subject: bug#35557: 26.1; false positive: Match data clobbered by buffer modification hooks Date: Sat, 02 Nov 2019 02:00:34 +0100 Message-ID: <878sozt7m5.fsf@marxist.se> References: <64899525-fd17-c715-dff4-b99996717f4f@cs.ucla.edu> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="193117"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: David Bremner , 35557@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Nov 02 02:01:16 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 (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iQhmz-000o5C-Gf for geb-bug-gnu-emacs@m.gmane.org; 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Fri, 01 Nov 2019 21:01:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Kangas Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 02 Nov 2019 01:01:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 35557 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: moreinfo Original-Received: via spool by 35557-submit@debbugs.gnu.org id=B35557.157265644713113 (code B ref 35557); Sat, 02 Nov 2019 01:01:02 +0000 Original-Received: (at 35557) by debbugs.gnu.org; 2 Nov 2019 01:00:47 +0000 Original-Received: from localhost ([127.0.0.1]:57686 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iQhmY-0003P9-Dy for submit@debbugs.gnu.org; Fri, 01 Nov 2019 21:00:46 -0400 Original-Received: from host.gofardesign.uk ([208.79.239.190]:42248) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iQhmV-0003GL-2o for 35557@debbugs.gnu.org; Fri, 01 Nov 2019 21:00:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=marxist.se; s=default; h=Content-Type:MIME-Version:Message-ID:Date:References: In-Reply-To:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=zPmOZH9O3hV4N6m553JdMSJSZZWAb3QGxki9XaaI/Ok=; b=A48b3eHfVqisFKUy8NhiEy7I+U HUvaMAb9gtgW4kjr7lKyL6P21WAEKoeOJfdl4rfoOtE1dpyl8YeG2EfN3wZBgozJRNI13xFtJ9p3/ cs2EXGHxAqTFmx78bZzZSdVZJ9MTtkOkvroay3TUwX5/CPXavbJq5MpTq4aTJXXlGxDA=; Original-Received: from h-70-69.a785.priv.bahnhof.se ([155.4.70.69]:51608 helo=localhost) by host.gofardesign.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1iQhmN-0006a6-SU; Fri, 01 Nov 2019 20:00:36 -0500 In-Reply-To: <64899525-fd17-c715-dff4-b99996717f4f@cs.ucla.edu> (Paul Eggert's message of "Sun, 5 May 2019 22:03:08 -0700") X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - host.gofardesign.uk X-AntiAbuse: Original Domain - debbugs.gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - marxist.se X-Get-Message-Sender-Via: host.gofardesign.uk: authenticated_id: stefan@marxist.se X-Authenticated-Sender: host.gofardesign.uk: stefan@marxist.se 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:170729 Archived-At: Paul Eggert writes: > 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]. I couldn't reproduce this bug either. David, could you please look into the above suggestions by Paul? Best regards, Stefan Kangas