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#1076: 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> <87vdw91wl1.fsf@cyd.mit.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----------=_1223571004-25424-4" X-Trace: ger.gmane.org 1223572279 12611 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 1Knz3M-0004tb-5w for geb-bug-gnu-emacs@m.gmane.org; Thu, 09 Oct 2008 19:11:56 +0200 Original-Received: from localhost ([127.0.0.1]:44195 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Knz2I-0004G6-54 for geb-bug-gnu-emacs@m.gmane.org; Thu, 09 Oct 2008 13:10:50 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Knz1b-0003d5-TN 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 1Knz1W-0003Zc-HZ for bug-gnu-emacs@gnu.org; Thu, 09 Oct 2008 13:10:05 -0400 Original-Received: from [199.232.76.173] (port=48939 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Knz1V-0003YI-Og for bug-gnu-emacs@gnu.org; Thu, 09 Oct 2008 13:10:01 -0400 Original-Received: from rzlab.ucr.edu ([138.23.92.77]:56866) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1Knz1U-0000Ng-W7 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 m99H9wmX030952; 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 m99Go4NL025582; 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 1076 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:21342 Archived-At: This is a multi-part message in MIME format... ------------=_1223571004-25424-4 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 ------------=_1223571004-25424-4 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=-5.4 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 16:17:09 +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 m93GH68m031709 for ; Fri, 3 Oct 2008 09:17:07 -0700 Received: from mail.gnu.org ([199.232.76.166]:49417 helo=mx10.gnu.org) by fencepost.gnu.org with esmtp (Exim 4.67) (envelope-from ) id 1KlnIm-0007j8-PT for emacs-pretest-bug@gnu.org; Fri, 03 Oct 2008 12:14:48 -0400 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1KlnKx-0000tR-IP for emacs-pretest-bug@gnu.org; Fri, 03 Oct 2008 12:17:04 -0400 Received: from cyd.mit.edu ([18.115.2.24]:33527) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1KlnKx-0000tF-9K for emacs-pretest-bug@gnu.org; Fri, 03 Oct 2008 12:17:03 -0400 Received: by cyd.mit.edu (Postfix, from userid 1000) id 7728E57E090; Fri, 3 Oct 2008 12:18:18 -0400 (EDT) From: Chong Yidong To: Kenichi Handa Cc: emacs-pretest-bug@gnu.org Subject: Re: Looping in redisplay due to font problem References: <878wt6a7aq.fsf@cyd.mit.edu> Date: Fri, 03 Oct 2008 12:18:18 -0400 In-Reply-To: (Kenichi Handa's message of "Fri, 03 Oct 2008 10:24:18 +0900") Message-ID: <87vdw91wl1.fsf@cyd.mit.edu> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) Kenichi Handa writes: > 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? C-u C-x = gives -unknown-DejaVu Sans Mono-normal-normal-normal-*-16-*-*-*-m-0-iso10646-1 > And, what does "Emacs begins looping while in redisplay" exactly mean? Emacs is unresponsive to any further input, and the character "o" in "Corsivo" flickers. Interrupting the loop in gdb gives the following backtrace. It seems to be stuck in an Xft function. #0 0x00007f54662e1433 in select () from /lib/libc.so.6 #1 0x00007f546403b2b6 in ?? () from /usr/lib/libxcb.so.1 #2 0x00007f546403b8eb in ?? () from /usr/lib/libxcb.so.1 #3 0x00007f546403c050 in xcb_send_request () from /usr/lib/libxcb.so.1 #4 0x00007f5466e71f1a in _XPutXCBBuffer () from /usr/lib/libX11.so.6 #5 0x00007f5466e72267 in ?? () from /usr/lib/libX11.so.6 #6 0x00007f54650be5a3 in XRenderFillRectangle () from /usr/lib/libXrender.so.1 #7 0x00007f5466c1f5b1 in XftDrawRect () from /usr/lib/libXft.so.2 #8 0x0000000000656080 in xftfont_draw (s=0x7fff725843b0, from=0, to=1, x=100, y=175, with_background=1) at xftfont.c:549 #9 0x00000000004e0268 in x_draw_glyph_string_foreground (s=0x7fff725843b0) at xterm.c:1316 #10 0x00000000004e374c in x_draw_glyph_string (s=0x7fff725843b0) at xterm.c:2708 #11 0x00000000004616f1 in draw_glyphs (w=0x17ec430, x=110, row=0x1f49b20, area=TEXT_AREA, start=7, end=8, hl=DRAW_NORMAL_TEXT, overlaps=0) at xdisp.c:20504 #12 0x0000000000466ec1 in x_write_glyphs (start=0x145f748, len=1) at xdisp.c:21913 #13 0x0000000000418fa4 in update_text_area (w=0x17ec430, vpos=8) at dispnew.c:4584 ... ------------=_1223571004-25424-4 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. ------------=_1223571004-25424-4--