From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: npostavs@users.sourceforge.net Newsgroups: gmane.emacs.bugs Subject: bug#23386: Segfault when messing with font-backend Date: Sun, 10 Jul 2016 16:17:00 -0400 Message-ID: <87a8hpgseb.fsf@users.sourceforge.net> References: <83y47zxi81.fsf@gnu.org> <87d1mmiq35.fsf@users.sourceforge.net> <73cd86e5-3c92-cb6a-3a7b-1a5ec82c05de@yandex.ru> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1468181913 28885 80.91.229.3 (10 Jul 2016 20:18:33 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 10 Jul 2016 20:18:33 +0000 (UTC) Cc: Stefan Monnier , 23386@debbugs.gnu.org To: Dmitry Antipov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Jul 10 22:18:21 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 1bMLBE-0007E8-IF for geb-bug-gnu-emacs@m.gmane.org; Sun, 10 Jul 2016 22:18:20 +0200 Original-Received: from localhost ([::1]:56779 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bMLBA-0004aV-G2 for geb-bug-gnu-emacs@m.gmane.org; Sun, 10 Jul 2016 16:18:16 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:48643) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bMLB0-0004YV-Pj for bug-gnu-emacs@gnu.org; Sun, 10 Jul 2016 16:18:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bMLAw-0007rc-IR for bug-gnu-emacs@gnu.org; Sun, 10 Jul 2016 16:18:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:33348) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bMLAw-0007rY-Em for bug-gnu-emacs@gnu.org; Sun, 10 Jul 2016 16:18:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bMLAw-00056p-Ar for bug-gnu-emacs@gnu.org; Sun, 10 Jul 2016 16:18:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: npostavs@users.sourceforge.net Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 10 Jul 2016 20:18:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 23386 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: confirmed Original-Received: via spool by 23386-submit@debbugs.gnu.org id=B23386.146818183119579 (code B ref 23386); Sun, 10 Jul 2016 20:18:02 +0000 Original-Received: (at 23386) by debbugs.gnu.org; 10 Jul 2016 20:17:11 +0000 Original-Received: from localhost ([127.0.0.1]:45685 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bMLA6-00055h-2y for submit@debbugs.gnu.org; Sun, 10 Jul 2016 16:17:10 -0400 Original-Received: from mail-it0-f43.google.com ([209.85.214.43]:36169) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bMLA4-00055V-Bj for 23386@debbugs.gnu.org; Sun, 10 Jul 2016 16:17:08 -0400 Original-Received: by mail-it0-f43.google.com with SMTP id f6so39922923ith.1 for <23386@debbugs.gnu.org>; Sun, 10 Jul 2016 13:17:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:references:date:in-reply-to:message-id :user-agent:mime-version; bh=mHUOSZOuGxT8ArhkfRxyzeisdn+WAry/vmq2+2ju6Is=; b=Q6YKzhyyKWkROq4xWlDPH8vt9ouTc7RZRP6G0mfE3Bi87rlrYdMkLqBxvrq/S/ahGW AxzdgZonZRbCaA0LKVYiSb8JgCeu4BYdam/GrtYYWDJLkomAWH31RSv/ElsLiixYNRiQ 8xqjLNo8w/Rrw5MzWArO0M4SVH9tf9eQL0Ox9iST85CDe1O6R62r8C5sP0mkYULl6U6n flK0IozTl9uVAvxPp8DKrLVImXdtpQ4bhiXq/I3xfckv1npoCQl4EO+k7dEO7uDYz8bQ eJUijfxIgjN5b/0tN60OCNowmlgqlLf/i2h0bI5XOY1v6AnHJHPVWm/QooAWnbieU0H/ Bfyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:from:to:cc:subject:references:date :in-reply-to:message-id:user-agent:mime-version; bh=mHUOSZOuGxT8ArhkfRxyzeisdn+WAry/vmq2+2ju6Is=; b=kt2gaclp9zIsjyVaHWKYCGONgZ4L+cyTzmLy2jynFt3A3KGeeq4CwY9tgSlAK/lQlE oaniG/8WWVHNUYVUNjgvx88IdkVLL1S6RS2aSIEZiVymzvE8HyeBhiQ+V5KF4KvDVxaO 7UxdESykHeh69Tq64WAPIL8f+BQAPUNudwrt3WJo0zNhjutYYTGweKrXu4Px0hj17YLy NUv7q69Dz5Xvm3gjlzt9Ss8KgxIRvAJtJNXmkhlynJ8DPOWpa1CF9Zm2eQdShv/1kIZ5 S38/7TkkL2CRaQj9n4pgc3L3ESZe5dX1bg8Hbyql6mitD9BTIzHHEKfyZZlRPhGqADFj T8hA== X-Gm-Message-State: ALyK8tJGIqiu4apyQ5g2YBteQaOmrHFiNCsjfJ6oOW/wiUMmMLB5Xkg8xzQCoQMmCFl5zQ== X-Received: by 10.36.64.151 with SMTP id n145mr12252009ita.10.1468181822774; Sun, 10 Jul 2016 13:17:02 -0700 (PDT) Original-Received: from zony (206-188-64-44.cpe.distributel.net. [206.188.64.44]) by smtp.googlemail.com with ESMTPSA id l184sm6096153itd.14.2016.07.10.13.17.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 10 Jul 2016 13:17:02 -0700 (PDT) In-Reply-To: <73cd86e5-3c92-cb6a-3a7b-1a5ec82c05de@yandex.ru> (Dmitry Antipov's message of "Sun, 10 Jul 2016 20:29:59 +0300") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.93 (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" Xref: news.gmane.org gmane.emacs.bugs:120820 Archived-At: Dmitry Antipov writes: > On 07/09/2016 10:11 PM, npostavs@users.sourceforge.net wrote: > >> Here is a patch that attempts to fix the issue by resetting the font >> after the backend is changed. It does let Emacs successfully open the >> frame with the new font (no funny box characters in the modeline), but >> I'm not sure if it's the best way of marking the font object invalid. > > IMHO the original trick (request to drop font backend when there is a font > opened by using this backend) is practically meaningless, so why just not > prohibit it explicitly? For example, with: Maybe that is a better idea; it does prevent the segfault, and it's certainly simpler.