From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#55744: infinite loop Date: Wed, 01 Jun 2022 17:35:04 +0200 Message-ID: <87a6aw4ct3.fsf@gnus.org> References: <878rqh4g1z.fsf@gnus.org> <874k154fbj.fsf@gnus.org> <87v8tl2k18.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="7393"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: 55744@debbugs.gnu.org To: "Daniel R. Grayson" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jun 01 17:36:19 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nwQOR-0001i2-F6 for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 01 Jun 2022 17:36:19 +0200 Original-Received: from localhost ([::1]:49152 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nwQOQ-000646-88 for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 01 Jun 2022 11:36:18 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46886) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nwQOC-00063v-Je for bug-gnu-emacs@gnu.org; Wed, 01 Jun 2022 11:36:04 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:57693) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nwQOA-0006ws-Qn for bug-gnu-emacs@gnu.org; Wed, 01 Jun 2022 11:36:04 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1nwQOA-0001EU-L3 for bug-gnu-emacs@gnu.org; Wed, 01 Jun 2022 11:36:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 01 Jun 2022 15:36:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 55744 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: moreinfo Original-Received: via spool by 55744-submit@debbugs.gnu.org id=B55744.16540977164660 (code B ref 55744); Wed, 01 Jun 2022 15:36:02 +0000 Original-Received: (at 55744) by debbugs.gnu.org; 1 Jun 2022 15:35:16 +0000 Original-Received: from localhost ([127.0.0.1]:51590 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nwQNQ-0001D6-Gs for submit@debbugs.gnu.org; Wed, 01 Jun 2022 11:35:16 -0400 Original-Received: from quimby.gnus.org ([95.216.78.240]:40910) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nwQNO-0001Cn-MV for 55744@debbugs.gnu.org; Wed, 01 Jun 2022 11:35:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References: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=4YDX+A6Ck2zeDExGgZ4j6Msnt9PEdMlVHCvm1UWzPlo=; b=rNpfiHikvaMHhVaWFH02QQcxDr klVkyom0t3cM/dnu4gu0/WSYmHBLTspXCGB1NCDduQnAkOJGU/PfwLf3RdU20AkGColgV/u4OjtZl BCbbQgEnsZhvLBc3H3sYuUwJ6WRsf0dferIx1wmXNYo+51+gZcrqvV56faqqFovP5xsM=; Original-Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nwQNF-0008Ot-Jt; Wed, 01 Jun 2022 17:35:07 +0200 X-Now-Playing: Pole's _Fading_: "=?UTF-8?Q?T=C3=B6lpel?=" In-Reply-To: (Daniel R. Grayson's message of "Wed, 1 Jun 2022 07:27:22 -0700") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:233492 Archived-At: "Daniel R. Grayson" writes: > Okay, I did that, and it seems to be this: > > (defconst M2-mode-font-lock-keywords > '("///\\(/?/?[^/]\\|\\(//\\)*////[^/]\\)*\\(//\\)*///" . > 'font-lock-string-face) ) That's a regexp with a lot of backtracking, I think (i.e., elements that can be matched both by the ?'s as well as the two *'s). So matching this will be slow, which results in the hangs you're seeing when Emacs is trying to match that to the text in the buffer. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no