From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: don@donarmstrong.com (Emacs bug Tracking System) Newsgroups: gmane.emacs.bugs Subject: bug#1071: marked as done (Looping in redisplay due to font problem) Date: Thu, 9 Oct 2008 09:50:04 -0700 Message-ID: References: <873aj5lnt2.fsf@cyd.mit.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----------=_1223571004-25424-2" X-Trace: ger.gmane.org 1223572279 12610 80.91.229.12 (9 Oct 2008 17:11:19 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 9 Oct 2008 17:11:19 +0000 (UTC) To: Chong Yidong Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Oct 09 19:12:14 2008 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1Knz3B-0004pR-26 for geb-bug-gnu-emacs@m.gmane.org; Thu, 09 Oct 2008 19:11:45 +0200 Original-Received: from localhost ([127.0.0.1]:44077 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Knz26-000479-On for geb-bug-gnu-emacs@m.gmane.org; Thu, 09 Oct 2008 13:10:38 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Knz1c-0003df-8O for bug-gnu-emacs@gnu.org; Thu, 09 Oct 2008 13:10:08 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Knz1Z-0003ZR-D5 for bug-gnu-emacs@gnu.org; Thu, 09 Oct 2008 13:10:05 -0400 Original-Received: from [199.232.76.173] (port=48940 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Knz1V-0003YL-OB for bug-gnu-emacs@gnu.org; Thu, 09 Oct 2008 13:10:01 -0400 Original-Received: from rzlab.ucr.edu ([138.23.92.77]:56864) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1Knz1V-0000Nc-6v for bug-gnu-emacs@gnu.org; Thu, 09 Oct 2008 13:10:01 -0400 Original-Received: from rzlab.ucr.edu (rzlab.ucr.edu [127.0.0.1]) by rzlab.ucr.edu (8.13.8/8.13.8/Debian-3) with ESMTP id m99H9wmV030952; Thu, 9 Oct 2008 10:09:59 -0700 Original-Received: (from debbugs@localhost) by rzlab.ucr.edu (8.13.8/8.13.8/Submit) id m99Go46R025544; Thu, 9 Oct 2008 09:50:04 -0700 X-Mailer: MIME-tools 5.420 (Entity 5.420) X-Loop: don@donarmstrong.com X-Emacs-PR-Message: closed 1071 X-Emacs-PR-Package: emacs X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: bug-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:21341 Archived-At: This is a multi-part message in MIME format... ------------=_1223571004-25424-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Your message dated Thu, 09 Oct 2008 12:45:45 -0400 with message-id <873aj5lnt2.fsf@cyd.mit.edu> and subject line Re: Looping in redisplay due to font problem has caused the Emacs bug report #1070, regarding Looping in redisplay due to font problem to be marked as done. This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact don@donarmstrong.com immediately.) --=20 1070: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=3D1070 Emacs Bug Tracking System Contact don@donarmstrong.com with problems ------------=_1223571004-25424-2 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 3.2.3-bugs.debian.org_2005_01_02 (2007-08-08) on rzlab.ucr.edu X-Spam-Level: X-Spam-Status: No, score=-6.1 required=4.0 tests=AWL,BAYES_00,IMPRONONCABLE_2, RCVD_IN_DNSWL_MED autolearn=ham version=3.2.3-bugs.debian.org_2005_01_02 Received: (at submit) by emacsbugs.donarmstrong.com; 3 Oct 2008 01:24:29 +0000 Received: from fencepost.gnu.org (fencepost.gnu.org [140.186.70.10]) by rzlab.ucr.edu (8.13.8/8.13.8/Debian-3) with ESMTP id m931OPwp003244 for ; Thu, 2 Oct 2008 18:24:27 -0700 Received: from mx10.gnu.org ([199.232.76.166]:32900) by fencepost.gnu.org with esmtp (Exim 4.67) (envelope-from ) id 1KlZMv-0000C4-3b for emacs-pretest-bug@gnu.org; Thu, 02 Oct 2008 21:22:09 -0400 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1KlZP4-0007It-TO for emacs-pretest-bug@gnu.org; Thu, 02 Oct 2008 21:24:24 -0400 Received: from mx1.aist.go.jp ([150.29.246.133]:51733) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1KlZP4-0007Hv-3F for emacs-pretest-bug@gnu.org; Thu, 02 Oct 2008 21:24:22 -0400 Received: from rqsmtp2.aist.go.jp (rqsmtp2.aist.go.jp [150.29.254.123]) by mx1.aist.go.jp with ESMTP id m931OJxk016728; Fri, 3 Oct 2008 10:24:19 +0900 (JST) env-from (handa@m17n.org) Received: from smtp2.aist.go.jp by rqsmtp2.aist.go.jp with ESMTP id m931OJeG029221; Fri, 3 Oct 2008 10:24:19 +0900 (JST) env-from (handa@m17n.org) Received: by smtp2.aist.go.jp with ESMTP id m931OJc3016521; Fri, 3 Oct 2008 10:24:19 +0900 (JST) env-from (handa@m17n.org) Received: from handa by etlken.m17n.org with local (Exim 4.69) (envelope-from ) id 1KlZP0-0001GA-VP; Fri, 03 Oct 2008 10:24:18 +0900 From: Kenichi Handa To: Chong Yidong CC: emacs-pretest-bug@gnu.org In-reply-to: <878wt6a7aq.fsf@cyd.mit.edu> (message from Chong Yidong on Thu, 02 Oct 2008 19:47:25 -0400) Subject: Re: Looping in redisplay due to font problem References: <878wt6a7aq.fsf@cyd.mit.edu> User-Agent: SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.2 Emacs/23.0.60 (i686-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.3 - "Ushinoya") Content-Type: text/plain; charset=US-ASCII Message-Id: Date: Fri, 03 Oct 2008 10:24:18 +0900 X-detected-operating-system: by monty-python.gnu.org: Solaris 9 In article <878wt6a7aq.fsf@cyd.mit.edu>, Chong Yidong writes: > After the 2008-07-09 change to ftfont.c, Emacs can loop during redisplay > under the following conditions: > xrdb /dev/null > emacs -Q fc-list.list [fc-list.list is attached] > > > > > Emacs begins looping while in redisplay, while displaying the text > "Corsivo" (the final letter "o" blinks rapidly). > Strangely enough, I can't reproduce this if I substitute C-v for > PageDown (?!??!). Also, the bug doesn't show up if there is an X > resource Emacs.geometry already defined. > The problem seems to have appeared for the first time during the checkin > listed below. My tests indicate that the other files involved this > checkin do not affect the problem. > Could you see if you can reproduce this problem, and review the code > changes to see if they may have caused it? Thanks! That's a very strange phenomenon. But, I can't reproduce it. When I hit PageDown four times, the top line is "Luxi Sans:style=Regular", and "Corsivo" appears on the 9th line (logically 8th line because of continuation). In my case, this font is selected for the default case: -bitstream-Bitstream Vera Sans Mono-normal-normal-normal-*-16-*-*-*-m-0-iso10646-1 Which font is selected in your case? And, what does "Emacs begins looping while in redisplay" exactly mean? --- Kenichi Handa handa@ni.aist.go.jp ------------=_1223571004-25424-2 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 3.2.3-bugs.debian.org_2005_01_02 (2007-08-08) on rzlab.ucr.edu X-Spam-Level: X-Spam-Status: No, score=-3.9 required=4.0 tests=AWL,BAYES_00 autolearn=ham version=3.2.3-bugs.debian.org_2005_01_02 Received: (at 1070-done) by emacsbugs.donarmstrong.com; 9 Oct 2008 16:44:01 +0000 Received: from cyd.mit.edu (CYD.MIT.EDU [18.115.2.24]) by rzlab.ucr.edu (8.13.8/8.13.8/Debian-3) with ESMTP id m99Ghw62024125 for <1070-done@emacsbugs.donarmstrong.com>; Thu, 9 Oct 2008 09:43:59 -0700 Received: by cyd.mit.edu (Postfix, from userid 1000) id 725A257E14E; Thu, 9 Oct 2008 12:45:45 -0400 (EDT) From: Chong Yidong To: Kenichi Handa Cc: 1070-done@emacsbugs.donarmstrong.com Subject: Re: Looping in redisplay due to font problem Date: Thu, 09 Oct 2008 12:45:45 -0400 Message-ID: <873aj5lnt2.fsf@cyd.mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii I found the bug: it's an infloop in update_text_area which can happen when the pixel width of the current glyph is smaller than the lbearing of the next glyph. I'm not sure why the bug was triggered only under the situation I described; maybe, only that exact geometry and font produced the numbers leading to the infloop. I've checked in a fix. ------------=_1223571004-25424-2--