From: Nicolas Pitre <nico@cam.org>
Date: Tue, 03 May 2005 15:04:51 GMT
Subject: Re: [PATCH] add the ability to create and retrieve delta objects
Message-ID: <Pine.LNX.4.62.0505031104080.14033@localhost.localdomain>
In-Reply-To: <200505031037.38005.mason@suse.com>

On Tue, 3 May 2005, Chris Mason wrote:

> On Tuesday 03 May 2005 10:24, Nicolas Pitre wrote:
> > On Tue, 3 May 2005, Chris Mason wrote:
> > > Hmmm, something is strange here, am I using this wrong?
> > >
> > > coffee:~/git/linus.orig # ./test-delta -d foo foo2 delta1
> > > coffee:~/git/linus.orig # ./test-delta -p foo delta1 out
> > > *** glibc detected *** free(): invalid next size (fast): 0x0804b008 ***
> > > Aborted
> >
> > Can you send me your foo and delta2 files?
> >
> Sorry, thought I had the whole command history in there.  I went for something 
> small to start ;)
> 
> coffee:~/git/linus.orig # echo foo > foo
> coffee:~/git/linus.orig # echo foo2 > foo2
> coffee:~/git/linus.orig # ./test-delta -d foo foo2 delta1
> coffee:~/git/linus.orig # ls -la delta1
> -rw-r--r--  1 root root 14 2005-05-03 10:36 delta1
> coffee:~/git/linus.orig # ./test-delta -p foo delta1 out
> *** glibc detected *** free(): invalid next size (fast): 0x0804b008 ***

OK, doh!

--- diff-delta.c.orig	2005-05-03 11:00:39.900529634 -0400
+++ diff-delta.c	2005-05-03 11:01:03.210031176 -0400
@@ -307,7 +307,7 @@
 	}
 
 	if (inscnt)
-		out[-inscnt - 1] = inscnt;
+		out[outpos - inscnt - 1] = inscnt;
 
 	delta_cleanup(&bdf);
 	*delta_size = outpos;