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#18438: 24.4.50; assertion failed in bidi.c Date: Mon, 20 Oct 2014 19:51:53 +0300 Message-ID: <83siiibs5y.fsf@gnu.org> References: <4745242cd3e424a6c4d5db0e8d3e33d0@amuri.net> <83h9zrlzc8.fsf@gnu.org> <54297FDB.6090606@cornell.edu> <837g0mmkf3.fsf@gnu.org> <6b19fab333f3d362ae61b30b299d7206@amuri.net> <83iok5ku74.fsf@gnu.org> <88ccbe34bf58322ae4b2a5657390c041@amuri.net> <83ppe1itu9.fsf@gnu.org> <837g08bdcy.fsf@gnu.org> <1c93d571dbd64d473e8c53ba59063425@amuri.net> <83k3416hlf.fsf@gnu.org> <02fd9e39e5724b113eb47ecef0408ae5@amuri.net> <83mw8w4gp6.fsf@gnu.org> <543FC3F6.9010101@cornell.edu> <83mw8scedk.fsf@gnu.org> <8fb0816e369e7468b2de862558dbbcbc@amuri.net> <83vbnebv7e.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1413824005 23371 80.91.229.3 (20 Oct 2014 16:53:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 20 Oct 2014 16:53:25 +0000 (UTC) Cc: 18438@debbugs.gnu.org, aidalgol@amuri.net To: Ken Brown Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Oct 20 18:53:18 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 1XgGCr-0007Nh-C3 for geb-bug-gnu-emacs@m.gmane.org; Mon, 20 Oct 2014 18:53:17 +0200 Original-Received: from localhost ([::1]:45969 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgGCq-0007aU-VT for geb-bug-gnu-emacs@m.gmane.org; Mon, 20 Oct 2014 12:53:16 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50407) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgGCj-0007a7-3v for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 12:53:14 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XgGCc-0006uv-Og for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 12:53:09 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:37127) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgGCc-0006uo-LF for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 12:53:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XgGCb-0008Qf-Um for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 12:53:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 20 Oct 2014 16:53:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 18438 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: moreinfo Original-Received: via spool by 18438-submit@debbugs.gnu.org id=B18438.141382393232326 (code B ref 18438); Mon, 20 Oct 2014 16:53:01 +0000 Original-Received: (at 18438) by debbugs.gnu.org; 20 Oct 2014 16:52:12 +0000 Original-Received: from localhost ([127.0.0.1]:57458 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgGBo-0008PK-29 for submit@debbugs.gnu.org; Mon, 20 Oct 2014 12:52:12 -0400 Original-Received: from mtaout29.012.net.il ([80.179.55.185]:34425) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgGBl-0008P3-3H for 18438@debbugs.gnu.org; Mon, 20 Oct 2014 12:52:10 -0400 Original-Received: from conversion-daemon.mtaout29.012.net.il by mtaout29.012.net.il (HyperSendmail v2007.08) id <0NDR008005F7H300@mtaout29.012.net.il> for 18438@debbugs.gnu.org; Mon, 20 Oct 2014 19:50:53 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout29.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NDR00N215GTBTA0@mtaout29.012.net.il>; Mon, 20 Oct 2014 19:50:53 +0300 (IDT) In-reply-to: <83vbnebv7e.fsf@gnu.org> 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: 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:94832 > Date: Mon, 20 Oct 2014 18:46:13 +0300 > From: Eli Zaretskii > Cc: 18438@debbugs.gnu.org > > IOW, these all exhibit the same bug, just in different places in the > Emacs sources. One possible cause that can explain all of these is that the CPU flags are reset between the comparison instruction and the following jump instruction. For example, if the Zero flag is reset, then a test for a NULL pointer will misbehave. Can anyone think of a scenario where this could happen? Another idea I have is to collect information about the Emacs build from all the 4 people who experience these problems, and look for common libraries or versions of libraries used for the build, like dbus, glib, maybe the Cygwin runtime versions, etc.