From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail
From: Madhu <enometh@meer.net>
Newsgroups: gmane.emacs.devel
Subject: (select-window nil) crash with gcc-8.2.0
Date: Sun, 07 Apr 2019 07:41:57 +0530
Message-ID: <m3bm1iy36a.fsf@leonis4.robolove.meer.net>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226";
	logging-data="107918"; mail-complaints-to="usenet@blaine.gmane.org"
To: emacs-devel@gnu.org
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Apr 07 05:30:25 2019
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>
Envelope-to: ged-emacs-devel@m.gmane.org
Original-Received: from lists.gnu.org ([209.51.188.17])
	by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256)
	(Exim 4.89)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>)
	id 1hCyVl-000RzP-0O
	for ged-emacs-devel@m.gmane.org; Sun, 07 Apr 2019 05:30:25 +0200
Original-Received: from localhost ([127.0.0.1]:33801 helo=lists.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>)
	id 1hCyVk-0006TT-1F
	for ged-emacs-devel@m.gmane.org; Sat, 06 Apr 2019 23:30:24 -0400
Original-Received: from eggs.gnu.org ([209.51.188.92]:55911)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <enometh@meer.net>) id 1hCyVa-0006T4-6e
	for emacs-devel@gnu.org; Sat, 06 Apr 2019 23:30:14 -0400
Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <enometh@meer.net>) id 1hCyVZ-0007DY-Cf
	for emacs-devel@gnu.org; Sat, 06 Apr 2019 23:30:14 -0400
Original-Received: from [59.93.21.75] (port=55058 helo=localhost.localdomain)
	by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)
	(Exim 4.71) (envelope-from <enometh@meer.net>) id 1hCyVY-0006ux-Ty
	for emacs-devel@gnu.org; Sat, 06 Apr 2019 23:30:13 -0400
Original-Received: (qmail 10745 invoked by uid 500); 7 Apr 2019 02:11:58 -0000
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no
	timestamps) [generic] [fuzzy]
X-Received-From: 59.93.21.75
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: "Emacs development discussions." <emacs-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-devel/>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=subscribe>
Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org
Original-Sender: "Emacs-devel" <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>
Xref: news.gmane.org gmane.emacs.devel:235055
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/235055>

Hello, Compiling emacs with gcc-8.2.0 on amd64 with CFLAGS = -O2 -Os
causes emacs to crash when invoking M-: (select-window nil).  Clearly
gcc-8.2.0 is miscompiling code with these optimization settings (-O2
-Os) and I'm seeing crashes elsewhere where I am unable to isolate the
problem.  However the emacs crash is easily isolatable and could point
to the bug in either gcc, (or possibly in emacs if there is some wrong
assumption). Maybe someone with gcc-8.2.0 can verify the crash?