Date:	Wed, 12 Jan 2000 08:51:22 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender:	eliz AT is
To:	jazir <entropic AT mpx DOT com DOT au>
cc:	djgpp AT delorie DOT com
Subject:	Re: upgrade chaos
In-Reply-To:	<387B38E0.1047EF30@mpx.com.au>
Message-ID:	<Pine.SUN.3.91.1000112085053.28074F@is>
MIME-Version:	1.0
Reply-To:	djgpp AT delorie DOT com
Errors-To:	dj-admin AT delorie DOT com
X-Mailing-List:	djgpp AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

On Wed, 12 Jan 2000, jazir wrote:

>   cuz now i have no idea which change caused my problems.  i have a textfile
> {de}/compression program that i wrote, and it used to work fantastically with
> all kinds of files, even very large ones.
> 
>   when compiled with my new installation, i get SIGSEGV in the function free()

What was the previous version of DJGPP you had installed?  If it was
v2.01 (not v2.02), then what you see is a bug in your program that
simply went unnoticed before v2.02.  Version 2.02 introduced a new,
more space-efficient version of malloc/free, which is now much less
tolerant to programs that write beyond the end of an allocated buffer,
or free a buffer more than once.

Try using some malloc debugger, like YAMD, to hunt down that bug.

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