Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Date:	Wed, 28 Jan 2004 01:16:22 -0800
From:	Yitzchak Scott-Thoennes <sthoenna AT efn DOT org>
To:	cygwin AT cygwin DOT com
Subject:	Re: perl cygwin weird thing ..
Message-ID:	<20040128091622.GA1008@efn.org>
References:	<opr2gsy2orsmddlu AT localhost>
Mime-Version:	1.0
In-Reply-To:	<opr2gsy2orsmddlu@localhost>
User-Agent:	Mutt/1.4i
Organization:	bs"d
X-IsSubscribed:	yes

On Wed, Jan 28, 2004 at 10:53:16AM +0800, pokley <pokleyzz AT scan-associates DOT net> wrote:
> im using latest cygwin 1.5.6 on windows 2000 server ia32.
> doing
> $ perl -e 'print "a" x 0xffffffff' will display weird result
> 
> perl will core dump when parsing file contain
> printf "%s",'a' x 0xffffffff;
> 
> does anybody got the same problem ?

This is a bug in perl.  It's taking the (size_t) length of the string
(1) times the (long long) repeat count (2**32-1), adding 1, and
casting it to a size_t, resulting in 0, thus bypassing realloc'ing the
string buffer for the result of the x.  Then it gleefully tromps all
over other things in memory.

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -