From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings Newsgroups: gmane.emacs.bugs Subject: bug#61514: 30.0.50; sadistically long xml line hangs emacs Date: Mon, 20 Feb 2023 17:14:11 +0000 Message-ID: References: <87lel0c65v.fsf@everybody.org> <838rgvymcd.fsf@gnu.org> <831qmkwmux.fsf@gnu.org> <83cz64v3v7.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37940"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Eli Zaretskii , 61514@debbugs.gnu.org, mah@everybody.org To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Feb 20 18:15:22 2023 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 1pU9l2-0009dl-WC for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 20 Feb 2023 18:15:21 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pU9km-0001na-FK; Mon, 20 Feb 2023 12:15:04 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pU9kl-0001nS-40 for bug-gnu-emacs@gnu.org; Mon, 20 Feb 2023 12:15:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pU9kk-0004mL-OG for bug-gnu-emacs@gnu.org; Mon, 20 Feb 2023 12:15:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1pU9kk-0005jo-2E for bug-gnu-emacs@gnu.org; Mon, 20 Feb 2023 12:15:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Gregory Heytings Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 20 Feb 2023 17:15:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 61514 X-GNU-PR-Package: emacs Original-Received: via spool by 61514-submit@debbugs.gnu.org id=B61514.167691325621970 (code B ref 61514); Mon, 20 Feb 2023 17:15:02 +0000 Original-Received: (at 61514) by debbugs.gnu.org; 20 Feb 2023 17:14:16 +0000 Original-Received: from localhost ([127.0.0.1]:53389 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1pU9jz-0005iI-TB for submit@debbugs.gnu.org; Mon, 20 Feb 2023 12:14:16 -0500 Original-Received: from heytings.org ([95.142.160.155]:37278) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1pU9jw-0005i6-RM for 61514@debbugs.gnu.org; Mon, 20 Feb 2023 12:14:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1676913251; bh=qINSAKqjF9PlWI3yJYW2hJvY8A9+uRm1/KbjP2H5mog=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=M3FNm9su0ieQ6t8eQCgOYjDUTEuj4nls23DJeYx7an/GMnwagq+VRC+Rq8vrLueJ0 XphS3d+eUpe8CPzyoR6CeT1GoIU37QDgItgfynAEgCQP/MFVwqf3AteQBTOR/iL6FA KI5cgqzugs9MCoNh9Y8YXDIFefnAIWDHYpf5jy/0nIkJWHdfA45xnAjhbVCFgGwPFy ZOGAzLNgvktYZPh9MCUoNh7A5AmKbdtiWriSRicJdTavx0ciLNy58qRUA6HdwIXzgF SPA4uv97SaDqUj6Bo5ohs80Q/Syt4FEG4GJea5fbnfMGytqGrgQ1vgh4XYuB0k0klL Rsn1sRI25IiIg== In-Reply-To: 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:256207 Archived-At: > > where I can even reduce the regexp down to "[-._[:alnum:]]*\t*=". > > Looks like we're missing a case in our backtracking-elimination code. > Apparently we're doing the same thing at the same moment ;-) I simplified it down to: (with-current-buffer (get-buffer-create "*bug*") (erase-buffer) (insert (make-string 266666 ?n)) (goto-char (point-min)) (looking-at "[[:alpha:]]*=*")) This fails with 266666, and succeeds with 266665.