From owner-freebsd-amd64@FreeBSD.ORG  Tue Oct 21 04:40:03 2008
Return-Path: <owner-freebsd-amd64@FreeBSD.ORG>
Delivered-To: freebsd-amd64@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E5249106569D
	for <freebsd-amd64@hub.freebsd.org>;
	Tue, 21 Oct 2008 04:40:03 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id D48158FC13
	for <freebsd-amd64@hub.freebsd.org>;
	Tue, 21 Oct 2008 04:40:03 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id m9L4e3ZA074249
	for <freebsd-amd64@freefall.freebsd.org>; Tue, 21 Oct 2008 04:40:03 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.3/8.14.3/Submit) id m9L4e3Y1074248;
	Tue, 21 Oct 2008 04:40:03 GMT (envelope-from gnats)
Date: Tue, 21 Oct 2008 04:40:03 GMT
Message-Id: <200810210440.m9L4e3Y1074248@freefall.freebsd.org>
To: freebsd-amd64@FreeBSD.org
From: Nate Eldredge <neldredge@math.ucsd.edu>
Cc: 
Subject: Re: amd64/128259: "`" crashes csh
X-BeenThere: freebsd-amd64@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Nate Eldredge <neldredge@math.ucsd.edu>
List-Id: Porting FreeBSD to the AMD64 platform <freebsd-amd64.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-amd64>,
	<mailto:freebsd-amd64-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-amd64>
List-Post: <mailto:freebsd-amd64@freebsd.org>
List-Help: <mailto:freebsd-amd64-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-amd64>,
	<mailto:freebsd-amd64-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 21 Oct 2008 04:40:04 -0000

The following reply was made to PR amd64/128259; it has been noted by GNATS.

From: Nate Eldredge <neldredge@math.ucsd.edu>
To: Jack Low <xxjack12xx@gmail.com>
Cc: freebsd-gnats-submit@freebsd.org, freebsd-amd64@freebsd.org
Subject: Re: amd64/128259: "`" crashes csh
Date: Mon, 20 Oct 2008 21:16:09 -0700 (PDT)

 On Tue, 21 Oct 2008, Jack Low wrote:
 
 >> Description:
 > If you type "`" in the csh shell, the shell crashes
 >> How-To-Repeat:
 > Type "`" and hit enter.
 >> Fix:
 
 Thanks for the report, Jack.
 
 I suspect this is related to bin/125185, which involved csh improperly 
 messing with global state in a vfork'ed subshell.  Note that for both the 
 present bug and 125185, the crash does not occur if csh is run with -F to 
 use fork() instead of vfork().
 
 nate@vulcan:/usr/home/nate$ csh
 %"`"
 Unmatched `.
 Segmentation fault: 11 (core dumped)
 nate@vulcan:/usr/home/nate$ csh -F
 %"`"
 Unmatched `.
 %
 
 I'll repeat my recommendation from 125185 that -F be made the default, so 
 that vfork() is not used.
 
 I doubt that this bug is amd64 specific but don't have another machine to 
 make sure at the moment.  Probably it should be reclassified as "bin". 
 It's also present in 7.0-RELEASE, by the way.
 
 -- 
 
 Nate Eldredge
 neldredge@math.ucsd.edu