From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ken Raeburn Newsgroups: gmane.emacs.bugs Subject: bug#18162: 24.3.92; segfault on null face pointer in face_for_char Date: Sat, 2 Aug 2014 06:00:34 -0400 Message-ID: <0917D61C-D040-44A7-B7D6-B4AD5BDB0BEA@permabit.com> References: <6ewqatjen6.fsf@just-testing.permabit.com> <838un8sqeo.fsf@gnu.org> <83vbqbqtc1.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1406973682 18999 80.91.229.3 (2 Aug 2014 10:01:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 2 Aug 2014 10:01:22 +0000 (UTC) Cc: 18162@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Aug 02 12:01:16 2014 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 1XDW7m-0002oZ-DK for geb-bug-gnu-emacs@m.gmane.org; Sat, 02 Aug 2014 12:01:14 +0200 Original-Received: from localhost ([::1]:43583 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XDW7m-0000Ak-35 for geb-bug-gnu-emacs@m.gmane.org; Sat, 02 Aug 2014 06:01:14 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55517) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XDW7f-0000Af-1T for bug-gnu-emacs@gnu.org; Sat, 02 Aug 2014 06:01:11 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XDW7a-00088U-HN for bug-gnu-emacs@gnu.org; Sat, 02 Aug 2014 06:01:06 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:47543) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XDW7a-00088M-Dj for bug-gnu-emacs@gnu.org; Sat, 02 Aug 2014 06:01:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XDW7Z-0006xd-OH for bug-gnu-emacs@gnu.org; Sat, 02 Aug 2014 06:01:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Ken Raeburn Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 02 Aug 2014 10:01:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 18162 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 18162-submit@debbugs.gnu.org id=B18162.140697364526726 (code B ref 18162); Sat, 02 Aug 2014 10:01:01 +0000 Original-Received: (at 18162) by debbugs.gnu.org; 2 Aug 2014 10:00:45 +0000 Original-Received: from localhost ([127.0.0.1]:54486 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XDW7I-0006wz-VX for submit@debbugs.gnu.org; Sat, 02 Aug 2014 06:00:45 -0400 Original-Received: from mail-qg0-f52.google.com ([209.85.192.52]:51828) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XDW7D-0006wd-Ab for 18162@debbugs.gnu.org; Sat, 02 Aug 2014 06:00:40 -0400 Original-Received: by mail-qg0-f52.google.com with SMTP id f51so6792004qge.25 for <18162@debbugs.gnu.org>; Sat, 02 Aug 2014 03:00:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=permabit.com; s=google; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=48wStxfkymRUsMNg1cCngV1Cj9JB+6azAkE1mztA8M8=; b=DbA5y7hdt7ADInRfNxaPwTyQzf9Aj4zS5rZ1jbLveCxxFnvGtjECoeswS19C3LLIFa 7L33PXqQcQ40QaHGXqK0EOH49J/C5Cn4ZVDrNR6JbTeOVhE93yrzg8arChaR3LlSWX+1 k6i3dyW0yytJc7YGI8iFnMLVEKMUxKvuSVxp4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:mime-version:content-type:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=48wStxfkymRUsMNg1cCngV1Cj9JB+6azAkE1mztA8M8=; b=mxQbMV/STaEHxaiZ7mlwSuvpvgtE5LTTe+EV/kcg5T+aR/YO2mesph3GN5f0GTfgFP VOwjudltK0qmt9Tx1q5yWrYzU6/OULOTNwr4BAPaLivmQQkAUzbbbNvabcDIxyDFu5iy sNMQSSYzmBVyohgS4sojlV09EBh82LgMg+yAdfwpnJi2gjXxOfaav9B6KiKW5GMhdHvX e5SYyfKnUtlRBjxfAW1sB2fplzLnSARE6kjNz22pj2Sx9ucEGilanRWgKyZm8e1gYxZh xglI6Dm4HpzJxV0bVOTTLq+EjacGKNNCv1ISQMBFVEbVLi5qZvuYJlVpQ5/4bjFtEVfr f60w== X-Gm-Message-State: ALoCoQk3D/OFtsJNZDsMJv5kOgxUUe62UhwQ9JrSaR7j/bhZP/KnyLYBOQl7nVDffsA7rKghdQeV X-Received: by 10.224.15.72 with SMTP id j8mr18203518qaa.8.1406973633403; Sat, 02 Aug 2014 03:00:33 -0700 (PDT) Original-Received: from ?IPv6:2002:328a:b786:1:a058:8eb2:5a34:42a5? ([2002:328a:b786:1:a058:8eb2:5a34:42a5]) by mx.google.com with ESMTPSA id c16sm19792548qae.49.2014.08.02.03.00.31 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 02 Aug 2014 03:00:32 -0700 (PDT) In-Reply-To: <83vbqbqtc1.fsf@gnu.org> X-Mailer: Apple Mail (2.1878.6) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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:92042 Archived-At: On Aug 2, 2014, at 02:49, Eli Zaretskii wrote: > There's nothing wrong with a call to clear_face_cache. We do this all > the time, as you have discovered. The problem is if we try using > faces after that without first realizing the basic faces. Okay, I guess I misread your earlier message as suggesting that that was = the problem. In any case, starting from that, I've got a recipe that = seems to be somewhat reliable at triggering the problem: emacs -Q M-x list-faces-display RET Type into the scratch buffer: (progn (clear-face-cache t) (internal-char-font nil 8230)) Hit C-j to evaluate. This generally works the first time. Move the = cursor back up to the end of the expression and hit C-j again. The = second time usually crashes for me. The use of list-faces-display came about through guesswork and it seems = to help. The real trick, I think, is to get = FRAME_DISPLAY_INFO(f)->n_fonts to be large enough to trigger the call to = free_all_realized_faces. Ken=