Message-ID: <4B161962.3090108@gmail.com>
Date: Wed, 02 Dec 2009 07:38:10 +0000
From: Dave Korn <dave.korn.cygwin@googlemail.com>
User-Agent: Thunderbird 2.0.0.17 (Windows/20080914)
MIME-Version: 1.0
To: cygwin@cygwin.com
Subject: Re: odd segfault with my c program using cygwin 1.7
References: <20071202162155.XNVY20104.mta10.adelphia.net@dual-xeon.weasel.com> 	 <20091202013344138.XZWP20286@cdptpa-omta02.mail.rr.com> <416096c60912012235h2e5290c3q4ad720134d4f0422@mail.gmail.com>
In-Reply-To: <416096c60912012235h2e5290c3q4ad720134d4f0422@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm
Sender: cygwin-owner@cygwin.com
Mail-Followup-To: cygwin@cygwin.com

Andy Koppe wrote:
> 2009/12/2 jeffunit:
>> My program ran fine under cygwin 1.5 as well as many versions of linux
>> including
>> mandriva 2009, mandriva 2009.1 and mandriva 2010.0
>>
>> When compiled with
>> gcc cal.c -o cal
>> and run with
>> cal 2009
>> I get a segmentation fault.
>> When I uncomment line 62, the program runs successfully.
> 
> It's the line after that that has the bug: it's writing to index 432
> of a 432-element array.

  Doesn't look like it does to me:

>         for(j=0; j<6*72; j++) {
> 	    //printf("joe %d\n", j);
> 	    string[j] = '\0';
> 	}

  That's less than 432, not less than or equal.

  It ran to completion on my machine without a problem.  I tried it without
any -O option, and at -O{0,2,3} without any problem.  I ran it under gdb and
set a watchpoint on string[432] and it ran without tripping.  So I don't know
what's going wrong for OP.

    cheers,
      DaveK

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