From owner-freebsd-bugs@freebsd.org  Sun Apr 30 20:20:00 2017
Return-Path: <owner-freebsd-bugs@freebsd.org>
Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9E823D57CF2
 for <freebsd-bugs@mailman.ysv.freebsd.org>;
 Sun, 30 Apr 2017 20:20:00 +0000 (UTC)
 (envelope-from bugzilla-noreply@freebsd.org)
Received: from kenobi.freebsd.org (kenobi.freebsd.org
 [IPv6:2001:1900:2254:206a::16:76])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 8E1607E3
 for <freebsd-bugs@FreeBSD.org>; Sun, 30 Apr 2017 20:20:00 +0000 (UTC)
 (envelope-from bugzilla-noreply@freebsd.org)
Received: from bugs.freebsd.org ([127.0.1.118])
 by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v3UKK0aH058403
 for <freebsd-bugs@FreeBSD.org>; Sun, 30 Apr 2017 20:20:00 GMT
 (envelope-from bugzilla-noreply@freebsd.org)
From: bugzilla-noreply@freebsd.org
To: freebsd-bugs@FreeBSD.org
Subject: [Bug 218943] /bin/sh regression? with doubly negated numbers
Date: Sun, 30 Apr 2017 20:20:00 +0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: Base System
X-Bugzilla-Component: bin
X-Bugzilla-Version: 11.0-STABLE
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: Affects Some People
X-Bugzilla-Who: z7dr6ut7gs@snkmail.com
X-Bugzilla-Status: Closed
X-Bugzilla-Resolution: Works As Intended
X-Bugzilla-Priority: ---
X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_status resolution
Message-ID: <bug-218943-8-znhDl76fHb@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-218943-8@https.bugs.freebsd.org/bugzilla/>
References: <bug-218943-8@https.bugs.freebsd.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs/>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 30 Apr 2017 20:20:00 -0000

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D218943

John Hein <z7dr6ut7gs@snkmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Closed
         Resolution|---                         |Works As Intended

--- Comment #2 from John Hein <z7dr6ut7gs@snkmail.com> ---
I see.

Not that bash is necessarily a good model to follow, but it supports the --=
/++
operators and is able to distinguish between the context when it's an opera=
tor
and a double negation.

% bash -c 'var=3D--123; echo $(($var)); echo $((--var))'
123
122
% bash -c 'echo $((--123))'
123

Same with/without POSIXLY_CORRECT.

But thanks for the explanation.  Closing this as 'works as intended'.  I gu=
ess
sh(1) could be enhanced to distinguish - from context - between the operator
and a double negation (and only throw the error for the former case).  I'm =
sure
it's quite tricky.

--=20
You are receiving this mail because:
You are the assignee for the bug.=