From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#53203: Comment with lots of color codes crashes or hangs emacs in scss-mode Date: Wed, 12 Jan 2022 15:16:57 +0200 Message-ID: <83r19d5c1i.fsf@gnu.org> References: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="27962"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 53203@debbugs.gnu.org To: Colin Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jan 12 15:04:27 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 1n7eEl-000775-4n for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 12 Jan 2022 15:04:27 +0100 Original-Received: from localhost ([::1]:50830 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n7eEk-0000fn-3f for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 12 Jan 2022 09:04:26 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:47766) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n7dVq-0003ws-78 for bug-gnu-emacs@gnu.org; Wed, 12 Jan 2022 08:18:04 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:35325) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1n7dVp-0003sW-PL for bug-gnu-emacs@gnu.org; Wed, 12 Jan 2022 08:18:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1n7dVp-00065L-Jl for bug-gnu-emacs@gnu.org; Wed, 12 Jan 2022 08:18:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 12 Jan 2022 13:18:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 53203 X-GNU-PR-Package: emacs Original-Received: via spool by 53203-submit@debbugs.gnu.org id=B53203.164199343723319 (code B ref 53203); Wed, 12 Jan 2022 13:18:01 +0000 Original-Received: (at 53203) by debbugs.gnu.org; 12 Jan 2022 13:17:17 +0000 Original-Received: from localhost ([127.0.0.1]:56461 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1n7dV3-00063z-CX for submit@debbugs.gnu.org; Wed, 12 Jan 2022 08:17:17 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:46910) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1n7dUy-00063b-5M for 53203@debbugs.gnu.org; Wed, 12 Jan 2022 08:17:11 -0500 Original-Received: from [2001:470:142:3::e] (port=44820 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n7dUs-0003md-U0; Wed, 12 Jan 2022 08:17:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=aYIoLQZrt3IgmBarVHmi0A90KLbJOBF6abtlMXPMqcU=; b=mgQM6cEIoQPH GSLTUCq9aRlCuKuU5kzWbwPl6V94bgig2KBfHQyA1zKtRjzbP3gelps4nbza7w1rqaio6fa/o3PVa pPeHrJVGVV0Zq0+3NaBlncqWgV8W4R+Nkb27eGp8FqYYynmurRCJ/YCes07Qes77z/FvdPcg53QgY Ak9Xu49X+NsmvScjjHQIP9u4uitaQ4vsp+mUlGQZ6pBaZTKmKsvQA0Y8sEhi+WrHIylZqZiwtUvoA xrhKU8nBHB6ocyNv1Is4f8lyU6+hvAtOdOs5CsKqmZqSYnNkelF5iurQDDbxRtIvmvP5ueP1MngGR BM2v7vTKTPDKDloBfXXNgA==; Original-Received: from [87.69.77.57] (port=3155 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n7dUr-0003lk-PS; Wed, 12 Jan 2022 08:17:02 -0500 In-Reply-To: (message from Colin on Wed, 12 Jan 2022 17:20:24 +1000) 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:223994 Archived-At: > Date: Wed, 12 Jan 2022 17:20:24 +1000 > From: Colin > > I have the following snippet in example.scss file: > > ``` > > /* > #ffffff #ffffff > #ffffff #ffffff > #ffffff #ffffff > #ffffff #ffffff > #ffffff #ffffff > */ > ``` > > On opening the file with emacs -Q (27.1 and a fresh build of git master > (29.0.50), emacs hangs. > > If I remove one/two lines, it appears to burn some CPU and then work, so > it looks like an exponential search or something. > > For now I'll remove the snippet from my code, but an interesting bug > nonetheless ;) It seems to infloop in JIT font-lock, and the culprit seems to be this part of font-lock-keywords: ;; Even though pseudo-elements should be prefixed by ::, a ;; single colon is accepted for backward compatibility. "\\(?:\\(:" (regexp-opt (append css-pseudo-class-ids css-pseudo-element-ids) t)