From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#31316: Emacs hangs in `font_open_entity' Date: Mon, 30 Apr 2018 22:44:49 +0300 Message-ID: <83wowoqy1a.fsf@gnu.org> References: <20180430.101308.1102659443644829077.wl@gnu.org> <838t94sot3.fsf@gnu.org> <20180430.192218.1552282367861674790.wl@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1525117448 18781 195.159.176.226 (30 Apr 2018 19:44:08 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 30 Apr 2018 19:44:08 +0000 (UTC) Cc: 31316@debbugs.gnu.org To: Werner LEMBERG Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Apr 30 21:44:03 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fDEiR-0004lS-0I for geb-bug-gnu-emacs@m.gmane.org; Mon, 30 Apr 2018 21:44:03 +0200 Original-Received: from localhost ([::1]:33088 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fDEkX-0005Fx-P8 for geb-bug-gnu-emacs@m.gmane.org; Mon, 30 Apr 2018 15:46:13 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44212) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fDEkQ-0005Fo-4p for bug-gnu-emacs@gnu.org; Mon, 30 Apr 2018 15:46:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fDEkM-0003gq-9B for bug-gnu-emacs@gnu.org; Mon, 30 Apr 2018 15:46:06 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:36358) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fDEkM-0003gg-4W for bug-gnu-emacs@gnu.org; Mon, 30 Apr 2018 15:46:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fDEkL-000773-VD for bug-gnu-emacs@gnu.org; Mon, 30 Apr 2018 15:46:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 30 Apr 2018 19:46:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 31316 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 31316-submit@debbugs.gnu.org id=B31316.152511751427288 (code B ref 31316); Mon, 30 Apr 2018 19:46:01 +0000 Original-Received: (at 31316) by debbugs.gnu.org; 30 Apr 2018 19:45:14 +0000 Original-Received: from localhost ([127.0.0.1]:44255 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fDEja-000764-9x for submit@debbugs.gnu.org; Mon, 30 Apr 2018 15:45:14 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:53019) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fDEjZ-00075q-DW for 31316@debbugs.gnu.org; Mon, 30 Apr 2018 15:45:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fDEjT-00034O-Ag for 31316@debbugs.gnu.org; Mon, 30 Apr 2018 15:45:08 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:41096) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fDEjN-000315-Gw; Mon, 30 Apr 2018 15:45:01 -0400 Original-Received: from [176.228.60.248] (port=1866 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1fDEjM-0003DG-VB; Mon, 30 Apr 2018 15:45:01 -0400 In-reply-to: <20180430.192218.1552282367861674790.wl@gnu.org> (message from Werner LEMBERG on Mon, 30 Apr 2018 19:22:18 +0200 (CEST)) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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" Xref: news.gmane.org gmane.emacs.bugs:145877 Archived-At: > Date: Mon, 30 Apr 2018 19:22:18 +0200 (CEST) > Cc: 31316@debbugs.gnu.org > From: Werner LEMBERG > > >> If I call `emacs -Q' and load the attached file `testchar' with > >> > >> C-x RET c gb18030 C-x C-f testchar > >> > >> Emacs hangs in `font_open_entity' on my GNU/Linux box: > > > > Does the patch below solve this without introducing any new > > problems? > > Sort of, thanks. After waiting a few seconds, Emacs now displays > three characters, but navigation is hard: it takes a few seconds to > move from character to character (I guess Emacs tries to reload the > missing glyph again and again). Well, maybe I went overboard with the 100 figure, and we should use a much smaller number, like 10 or 20? And anyway, some delays are better than an infloop, yes? > >> Both `average_width' and `height' are always zero for `font' > >> regardless of `psize'; this effectively makes the above code an > >> endless loop. > > > > What kind of strange font has both of these always zero? > > If you tell me how to find out the name of the font Emacs tries to > use, I can try to answer this question. Put a breakpoint in the loop, and when it breaks, say (gdb) pp entity (You will need to make sure src/.gdbinit in the Emacs tree is read by GDB, before "pp" will work for you.)