From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: David Bremner Newsgroups: gmane.emacs.bugs Subject: bug#35557: 26.1; false positive: Match data clobbered by buffer modification hooks Date: Mon, 02 Dec 2019 22:48:12 -0400 Message-ID: <87sgm2m8er.fsf@tethera.net> References: <64899525-fd17-c715-dff4-b99996717f4f@cs.ucla.edu> <878sozt7m5.fsf@marxist.se> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="18631"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 35557@debbugs.gnu.org To: Stefan Kangas , Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Dec 03 04:05:14 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 1ibyUz-0004iM-S5 for geb-bug-gnu-emacs@m.gmane.org; Tue, 03 Dec 2019 04:05:13 +0100 Original-Received: from localhost ([::1]:47750 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ibyUy-0003V2-OH for geb-bug-gnu-emacs@m.gmane.org; Mon, 02 Dec 2019 22:05:12 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51798) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ibyFL-0000fj-RZ for bug-gnu-emacs@gnu.org; Mon, 02 Dec 2019 21:49:05 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ibyFK-0003GV-Re for bug-gnu-emacs@gnu.org; Mon, 02 Dec 2019 21:49:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:33219) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ibyFK-0003G4-MO for bug-gnu-emacs@gnu.org; Mon, 02 Dec 2019 21:49:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1ibyFK-0002Dp-Je for bug-gnu-emacs@gnu.org; Mon, 02 Dec 2019 21:49:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: David Bremner Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 03 Dec 2019 02:49:02 +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=B35557.15753413068495 (code B ref 35557); Tue, 03 Dec 2019 02:49:02 +0000 Original-Received: (at 35557) by debbugs.gnu.org; 3 Dec 2019 02:48:26 +0000 Original-Received: from localhost ([127.0.0.1]:39192 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ibyEk-0002Cx-0T for submit@debbugs.gnu.org; Mon, 02 Dec 2019 21:48:26 -0500 Original-Received: from fethera.tethera.net ([198.245.60.197]:36578) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ibyEi-0002Cp-B9 for 35557@debbugs.gnu.org; Mon, 02 Dec 2019 21:48:24 -0500 Original-Received: from remotemail by fethera.tethera.net with local (Exim 4.89) (envelope-from ) id 1ibyEX-0007Ot-F1; Mon, 02 Dec 2019 21:48:13 -0500 Original-Received: (nullmailer pid 1208363 invoked by uid 1000); Tue, 03 Dec 2019 02:48:12 -0000 In-Reply-To: <878sozt7m5.fsf@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:172796 Archived-At: Stefan Kangas writes: > 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? FYI I've filed Debian bug 931651 about this. I did duplicate the problem without docker, and with emacs 26.3, but on an s390x system (and it seems to be sensitive to _which_ s390x system, so that is a bit discouraging). I haven't had time to follow up Paul's suggestions. d