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: Thu, 13 Jan 2022 10:58:34 +0200 Message-ID: <8335ls3tc5.fsf@gnu.org> References: <83r19d5c1i.fsf@gnu.org> <87wnj486il.fsf@gnus.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16082"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 53203@debbugs.gnu.org, my.old.email.sucked@gmail.com To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jan 13 09:59:10 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 1n7vwr-0003xX-0t for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 13 Jan 2022 09:59:09 +0100 Original-Received: from localhost ([::1]:54906 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n7vwp-0008Rs-W6 for geb-bug-gnu-emacs@m.gmane-mx.org; 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Original-Received: from [87.69.77.57] (port=4522 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 1n7vwM-0005qq-0S; Thu, 13 Jan 2022 03:58:38 -0500 In-Reply-To: <87wnj486il.fsf@gnus.org> (message from Lars Ingebrigtsen on Thu, 13 Jan 2022 08:00:18 +0100) 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:224078 Archived-At: > From: Lars Ingebrigtsen > Cc: Colin , 53203@debbugs.gnu.org > Date: Thu, 13 Jan 2022 08:00:18 +0100 > > Eli Zaretskii writes: > > > 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) > > Trying to understand the regexp used for scss here, I think that bit is > somewhat innocuous -- it just matches those words. > > ;; 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) > "\\|::" (regexp-opt css-pseudo-element-ids t) "\\)" I posted that because I saw this regexp in the backtrace obtained by interrupting the infloop.