From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: =?UTF-8?Q?=C3=93scar?= Fuentes Newsgroups: gmane.emacs.bugs Subject: bug#22739: 25.0.50; Hangs on revertig buffer Date: Sun, 06 Mar 2016 02:28:29 +0100 Message-ID: <8737s48kea.fsf@wanadoo.es> References: <87lh6hcr2o.fsf@telefonica.net> <83ziuxru6l.fsf@gnu.org> <87h9h4dg3q.fsf@wanadoo.es> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1457227765 1564 80.91.229.3 (6 Mar 2016 01:29:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 6 Mar 2016 01:29:25 +0000 (UTC) Cc: 22739@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Mar 06 02:29:12 2016 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 1acNVP-0005LW-QM for geb-bug-gnu-emacs@m.gmane.org; Sun, 06 Mar 2016 02:29:11 +0100 Original-Received: from localhost ([::1]:48764 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1acNVO-0001FA-R2 for geb-bug-gnu-emacs@m.gmane.org; Sat, 05 Mar 2016 20:29:10 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50360) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1acNVL-0001Ez-Fj for bug-gnu-emacs@gnu.org; Sat, 05 Mar 2016 20:29:08 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1acNVG-0007Xb-Fl for bug-gnu-emacs@gnu.org; Sat, 05 Mar 2016 20:29:07 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:38753) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1acNVG-0007XX-C3 for bug-gnu-emacs@gnu.org; Sat, 05 Mar 2016 20:29:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84) (envelope-from ) id 1acNVG-0001mU-3Q for bug-gnu-emacs@gnu.org; Sat, 05 Mar 2016 20:29:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: =?UTF-8?Q?=C3=93scar?= Fuentes Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 06 Mar 2016 01:29:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 22739 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 22739-submit@debbugs.gnu.org id=B22739.14572277206815 (code B ref 22739); Sun, 06 Mar 2016 01:29:02 +0000 Original-Received: (at 22739) by debbugs.gnu.org; 6 Mar 2016 01:28:40 +0000 Original-Received: from localhost ([127.0.0.1]:35880 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1acNUu-0001lr-6f for submit@debbugs.gnu.org; Sat, 05 Mar 2016 20:28:40 -0500 Original-Received: from relaycp03.dominioabsoluto.net ([217.116.26.84]:60309) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1acNUr-0001lc-GO for 22739@debbugs.gnu.org; Sat, 05 Mar 2016 20:28:38 -0500 Original-Received: from smtp.movistar.es (smtp10.acens.net [86.109.99.134]) by relaycp03.dominioabsoluto.net (Postfix) with ESMTP id E64DBBFA227; Sun, 6 Mar 2016 02:28:30 +0100 (CET) X-CTCH-RefID: str=0001.0A0B0206.56DB87BE.010B, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown Original-Received: from qcore (79.153.146.151) by smtp.movistar.es (8.6.122.03) (authenticated as 981711563$telefonica.net) id 56BAF3A601CB2C05; Sun, 6 Mar 2016 01:28:30 +0000 In-Reply-To: <87h9h4dg3q.fsf@wanadoo.es> ("=?UTF-8?Q?=C3=93scar?= Fuentes"'s message of "Fri, 19 Feb 2016 13:44:41 +0100") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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:114467 Archived-At: It happened again, but this time the file was corrupt and contained 230 KB of garbage (all nulls except for the last few characters, which are ASCII.) The infloop was on bidi functions and it was necessary to SIGKILL the process. SIGINT didn't work. It is repeatable with emacs -Q. In GNU/Linux you can create a file full of nulls with $ truncate -s 100000 kk $ emacs -Q kk It seems that it is some type of quadratic (or worse) time complexity with long lines, because with smaller sizes (100, 1000, ...) Emacs comes back. So it is the old problem with very long lines. We should try to bail out when processing this type of lines takes too much time. From certain point, simply refusing to display the line (or the entire file) is preferable to freezing Emacs.