From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Tassilo Horn Newsgroups: gmane.emacs.bugs Subject: bug#18577: Regexp I-search: [(error Stack overflow in regexp matcher)] Date: Thu, 27 Nov 2014 09:44:36 +0100 Message-ID: <878uixm3rf.fsf@thinkpad-t440p.tsdh.org> References: <20140928085554.GA3157@acm.acm> <87mw9kt3m7.fsf@igel.home> <20140928123717.GC3157@acm.acm> <87d2afud0p.fsf@igel.home> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1417077928 13218 80.91.229.3 (27 Nov 2014 08:45:28 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 27 Nov 2014 08:45:28 +0000 (UTC) Cc: 18577@debbugs.gnu.org, Andreas Schwab , Alan Mackenzie To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Nov 27 09:45:21 2014 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XtuhU-0003ac-Uh for geb-bug-gnu-emacs@m.gmane.org; Thu, 27 Nov 2014 09:45:21 +0100 Original-Received: from localhost ([::1]:38199 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XtuhU-0002I1-G0 for geb-bug-gnu-emacs@m.gmane.org; Thu, 27 Nov 2014 03:45:20 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:49595) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XtuhK-0002Ht-F8 for bug-gnu-emacs@gnu.org; Thu, 27 Nov 2014 03:45:17 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XtuhC-0004Ve-VD for bug-gnu-emacs@gnu.org; Thu, 27 Nov 2014 03:45:10 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:49766) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XtuhC-0004VU-Rx for bug-gnu-emacs@gnu.org; Thu, 27 Nov 2014 03:45:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XtuhC-0006MQ-3C for bug-gnu-emacs@gnu.org; Thu, 27 Nov 2014 03:45:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Tassilo Horn Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 27 Nov 2014 08:45:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 18577 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: notabug Original-Received: via spool by 18577-submit@debbugs.gnu.org id=B18577.141707788424402 (code B ref 18577); Thu, 27 Nov 2014 08:45:02 +0000 Original-Received: (at 18577) by debbugs.gnu.org; 27 Nov 2014 08:44:44 +0000 Original-Received: from localhost ([127.0.0.1]:46979 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xtugt-0006LT-Rs for submit@debbugs.gnu.org; Thu, 27 Nov 2014 03:44:44 -0500 Original-Received: from deliver.uni-koblenz.de ([141.26.64.15]:50766) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xtugq-0006LE-2E for 18577@debbugs.gnu.org; Thu, 27 Nov 2014 03:44:41 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by deliver.uni-koblenz.de (Postfix) with ESMTP id DF2743D6006; Thu, 27 Nov 2014 09:44:37 +0100 (CET) X-Virus-Scanned: amavisd-new at uni-koblenz.de Original-Received: from deliver.uni-koblenz.de ([127.0.0.1]) by localhost (deliver.uni-koblenz.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TNDjCCsqi9Aj; Thu, 27 Nov 2014 09:44:37 +0100 (CET) X-CHKRCPT: Envelopesender noch tsdh@gnu.org Original-Received: from thinkpad-t440p.tsdh.org (dhcp85.uni-koblenz.de [141.26.71.85]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by deliver.uni-koblenz.de (Postfix) with ESMTPSA id 84D0E1A85E5; Thu, 27 Nov 2014 09:44:37 +0100 (CET) In-Reply-To: (Stefan Monnier's message of "Sun, 28 Sep 2014 13:35:30 -0400") User-Agent: Gnus/5.130012 (Ma Gnus v0.12) Emacs/25.0.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:96660 Archived-At: We have a similar bug report for AUCTeX/RefTeX, although the regex doesn't look that bad as Alan's. Too reproduce, create a file with 10000 lines with the word foo, and evaluate this: (re-search-forward "^[^%]*\\\\usepackage.*{biblatex}" nil t) Here, there's no double-* or nested-* but still you get a stack overflow in the regexp matcher. Ah, the problem here is that [^%] also matches \n. I've just seen that this regex has already been fixed to "^[^%\n]*?\\\\usepackage.*{biblatex}" on master, and I've backported the fix to the emacs-24 branch. Bye, Tassilo