From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#21394: 25.0.50; Segfault when displaying unprintable character in echo area while frames are being created Date: Tue, 01 Sep 2015 19:57:19 +0300 Message-ID: <83y4gqaxhs.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1441126706 30933 80.91.229.3 (1 Sep 2015 16:58:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 1 Sep 2015 16:58:26 +0000 (UTC) Cc: 21394@debbugs.gnu.org To: Pip Cet Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Sep 01 18:58:15 2015 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 1ZWosw-0007A2-SG for geb-bug-gnu-emacs@m.gmane.org; Tue, 01 Sep 2015 18:58:15 +0200 Original-Received: from localhost ([::1]:55992 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZWosw-0004D6-MC for geb-bug-gnu-emacs@m.gmane.org; Tue, 01 Sep 2015 12:58:14 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54269) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZWosn-0004Ca-Fn for bug-gnu-emacs@gnu.org; Tue, 01 Sep 2015 12:58:11 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZWosk-0004Lp-L4 for bug-gnu-emacs@gnu.org; Tue, 01 Sep 2015 12:58:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:53101) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZWosk-0004Lj-Hv for bug-gnu-emacs@gnu.org; Tue, 01 Sep 2015 12:58:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1ZWosk-0008VW-EY for bug-gnu-emacs@gnu.org; Tue, 01 Sep 2015 12:58:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 01 Sep 2015 16:58:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 21394 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 21394-submit@debbugs.gnu.org id=B21394.144112663232645 (code B ref 21394); Tue, 01 Sep 2015 16:58:02 +0000 Original-Received: (at 21394) by debbugs.gnu.org; 1 Sep 2015 16:57:12 +0000 Original-Received: from localhost ([127.0.0.1]:45311 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZWorv-0008UQ-Jq for submit@debbugs.gnu.org; Tue, 01 Sep 2015 12:57:12 -0400 Original-Received: from mtaout25.012.net.il ([80.179.55.181]:58863) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZWoru-0008UI-1I for 21394@debbugs.gnu.org; Tue, 01 Sep 2015 12:57:10 -0400 Original-Received: from conversion-daemon.mtaout25.012.net.il by mtaout25.012.net.il (HyperSendmail v2007.08) id <0NU000500BZDRE00@mtaout25.012.net.il> for 21394@debbugs.gnu.org; Tue, 01 Sep 2015 19:53:48 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by mtaout25.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NU00044FC9NHF30@mtaout25.012.net.il>; Tue, 01 Sep 2015 19:53:48 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il 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: 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:106063 Archived-At: > Date: Tue, 1 Sep 2015 16:43:13 +0000 > From: Pip Cet > > Launch emacs -Q. > > C-x C-f emacs-bug-038.el > M-x eval-buffer > > Wait for approximately one minute. I waited for 1.5 minutes, and saw no crash. But that doesn't surprise me, since these problems are very elusive. > 26484 if (it->what == IT_CHARACTER) > 26485 { > 26486 XChar2b char2b; > 26487 struct face *face = FACE_FROM_ID (it->f, it->face_id); > 26488 struct font *font = face->font; > 26489 struct font_metrics *pcm = NULL; > 26490 int boff; /* Baseline offset. */ > 26491 > 26492 if (font == NULL) > (gdb) p face > $1 = (struct face *) 0x0 > (gdb) p it->face_id > $2 = 18 > (gdb) p it->f->face_cache->used > $3 = 15 This is another incarnation of several similar crashes we've seen for the past year or so (you can see them on the bug tracker). I was never able to find the code path which is responsible for this strange situation, where a (supposedly) realized face is somehow not cached. If you can somehow produce a trace of face caching and un-caching in this recipe, with backtraces to show who calls those, perhaps we could finally nail this sucker.