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 22:39:56 +0300 Message-ID: <83h9yybkdv.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> <83siiibs5y.fsf@gnu.org> <87siiir0uy.fsf@violet.siamics.net> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Trace: ger.gmane.org 1413834090 20419 80.91.229.3 (20 Oct 2014 19:41:30 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 20 Oct 2014 19:41:30 +0000 (UTC) Cc: 18438@debbugs.gnu.org To: Ivan Shmakov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Oct 20 21:41:23 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 1XgIpW-000804-CU for geb-bug-gnu-emacs@m.gmane.org; Mon, 20 Oct 2014 21:41:22 +0200 Original-Received: from localhost ([::1]:46561 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgIpV-000840-RB for geb-bug-gnu-emacs@m.gmane.org; Mon, 20 Oct 2014 15:41:21 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54816) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgIpN-000808-0u for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 15:41:18 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XgIpD-0005Sj-4v for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 15:41:12 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:37169) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XgIpD-0005Se-0t for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 15:41:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XgIpB-0004SU-RK for bug-gnu-emacs@gnu.org; Mon, 20 Oct 2014 15:41:02 -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 19:41:01 +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=B18438.141383401617069 (code B ref 18438); Mon, 20 Oct 2014 19:41:01 +0000 Original-Received: (at 18438) by debbugs.gnu.org; 20 Oct 2014 19:40:16 +0000 Original-Received: from localhost ([127.0.0.1]:57499 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgIoR-0004RE-6V for submit@debbugs.gnu.org; Mon, 20 Oct 2014 15:40:15 -0400 Original-Received: from mtaout29.012.net.il ([80.179.55.185]:38288) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XgIoN-0004Qy-6J for 18438@debbugs.gnu.org; Mon, 20 Oct 2014 15:40:12 -0400 Original-Received: from conversion-daemon.mtaout29.012.net.il by mtaout29.012.net.il (HyperSendmail v2007.08) id <0NDR00G00CTBIF00@mtaout29.012.net.il> for 18438@debbugs.gnu.org; Mon, 20 Oct 2014 22:38:56 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout29.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NDR008C5D8WBE90@mtaout29.012.net.il>; Mon, 20 Oct 2014 22:38:56 +0300 (IDT) In-reply-to: <87siiir0uy.fsf@violet.siamics.net> 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:94839 > From: Ivan Shmakov > Date: Mon, 20 Oct 2014 19:35:01 +0000 > > >>>>> Eli Zaretskii writes: > >>>>> From: Eli Zaretskii > > >> 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? > > For me, it’s much easier to imagine a misbehaving compiler here. > Is there a chance of getting a disassembly at the points of > interest? It was posted several times in this bug report, look it up.