From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-29447-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 26288 invoked by alias); 3 Jun 2011 19:02:30 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 29447
Received: (qmail 6314 invoked from network); 3 Jun 2011 19:02:18 -0000
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW autolearn=ham
	version=3.3.1
Received-SPF: pass (ns1.primenet.com.au: SPF record at _spf.google.com designates 209.85.220.171 as permitted sender)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=domainkey-signature:mime-version:in-reply-to:references:date
         :message-id:subject:from:to:cc:content-type;
        bh=fwYRdelpdevpJidUt5gtiBJpNK/TiCocnNSKKFBvmb0=;
        b=rTUBoV6KaLKDbvhFCvckok5NU8uD8/AqXIss6l/iFJN0V4OnM3sv+JNCpAZlMtbwrq
         6YmpAs43GJaFNyf9VCWsZftbU+uCPYRJl9lDSSijf3ahDxnYh+jAy7g+evN+6bja6G/l
         0X2/j1Wy+PgdMutlZ1WWIhxu3G1nosDdoriZQ=
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :cc:content-type;
        b=RDoGC79UAild38HwJMzT8MRk75G45lXrN5S0d2s0MCyeR1Z3su0SAIZnLqIVsPCzNJ
         R1RpnsivlmjBfSWlMLLzy7/W2wSEX9DxlMGczAa4nzumREmguRK6/RcMldt+C30B6/xg
         0md644Ndr0SW3Ll20RxgRyRUKyVaS+CM4lurk=
MIME-Version: 1.0
In-Reply-To: <4DE9212A.2080601@redhat.com>
References: <4DE9212A.2080601@redhat.com>
Date: Fri, 3 Jun 2011 20:55:00 +0200
Message-ID: <BANLkTinWR8LuiQiHoVNABB2uuMt_U4d3TQ@mail.gmail.com>
Subject: Re: regression in ${##""}
From: Mikael Magnusson <mikachu@gmail.com>
To: Eric Blake <eblake@redhat.com>
Cc: zsh-workers@zsh.org
Content-Type: text/plain; charset=UTF-8

On 3 June 2011 20:00, Eric Blake <eblake@redhat.com> wrote:
> POSIX requires ${##""} to be parsed as ${parameter#word} with parameter
> of # and word of "", which results in the output of $# with the shortest
> prefix of the empty string removed (aka ${#}).  But current zsh.git
> rejects this:
>
> $ ./Src/zsh -c 'set a b; echo ${##""}'
> zsh:1: bad substitution
>
> Worse, this is a regression:
>
> $ zsh -c 'set a b; echo ${##""}'
> 2
> $ rpm -q zsh
> zsh-4.3.10-5.fc14.x86_64

Not a surprise, this is due to

28889: ${##} should return the length of $#

-- 
Mikael Magnusson