Date: Sun, 15 Dec 2002 00:08:32 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: "Lars O. Hansen" <lars DOT o DOT hansen AT gmx DOT de>
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CC: djgpp AT delorie DOT com
In-reply-to: <atfirg$1j4$1@news.online.de> (lars.o.hansen@gmx.de)
Subject: Re: problem with malloc and free
References: <000001c2a37a$59f41060$186a10ac AT citechbd DOT com> <atfimi$1fk$1 AT news DOT online DOT de> <atfirg$1j4$1 AT news DOT online DOT de>
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> From: "Lars O. Hansen" <lars DOT o DOT hansen AT gmx DOT de>
> Newsgroups: comp.os.msdos.djgpp
> Date: Sat, 14 Dec 2002 16:30:55 +0100
> >
> > Call frame traceback EIPs:
> >   0x00003825 _free+77
> >   0x000018bb _freeall+99
> >   0x0000353f _exit+31
> >   0x0000171f _main+31
> >   0x00003138 ___crt1_startup+176
> 
> also as you can see in the traceback in Re to Richard, it crashed in
> the first free. So free is somehow the problem.

Crashes inside `free' or `malloc' usually mean that your program
overwrites buffers allocated with `malloc' and thus destroys hidden
data about the heap stored by `malloc' at both ends of the buffer it
allocates.

So you need to look for such bugs in your program.