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Date: Tue, 5 Feb 2013 19:14:21 +0100
From: Stefan Sperling <stsp@elego.de>
To: Alexey Neyman <stilor@att.net>
Cc: users@subversion.apache.org, Johan Corveleyn <jcorvel@gmail.com>,
        Alfred Perlstein <bright@mu.org>
Subject: Re: FreeBSD project and subversion.
Message-ID: <20130205181421.GD32341@byrne.stsp.name>
Mail-Followup-To: Alexey Neyman <stilor@att.net>,
	users@subversion.apache.org, Johan Corveleyn <jcorvel@gmail.com>,
	Alfred Perlstein <bright@mu.org>
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 <3629059.HZCLfd0A0T@etoile>
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User-Agent: Mutt/1.5.21 (2010-09-15)

On Tue, Feb 05, 2013 at 09:19:19AM -0800, Alexey Neyman wrote:
> There is one more weird issue with svn diff, see the script below. The issue 
> is that "--old=A --new=B" is not opposite of "--old=B --new=A". I don't know 
> if it is a bug or another ambuguity I am not aware of :)
> 
> Here is the script:
> [[[
> #!/bin/bash
> 
> REPO=/tmp/foo
> WC=/tmp/foo.wc
> 
> rm -rf $REPO $WC
> svnadmin create $REPO
> svn co -q file://$REPO $WC
> cd $WC
> 
> echo r1 > a
> svn add -q a
> svn ci -q -m R1
> echo r2 > a
> svn ci -q -m R2
> svn up -q -r 1
> echo new > a
> echo "Issue: --old=A --new=B is not opposite of --old=B --new=A"
> echo "  Running: svn di --old=^/ --new=."
> svn di --old=^/ --new=.
> echo "  Running: svn di --old=. --new=^/"
> svn di --old=. --new=^/
> ]]]
> 
> And here is the output (svn 1.7.6):
> [[[
> Issue: --old=A --new=B is not opposite of --old=B --new=A
>   Running: svn di --old=^/ --new=.
> Index: a
> ===================================================================
> --- a   (.../file:///tmp/foo)   (revision 2)
> +++ a   (working copy)
> @@ -1 +1 @@
> -r2
> +new
>   Running: svn di --old=. --new=^/
> Index: a
> ===================================================================
> --- a   (working copy)
> +++ a   (.../file:///tmp/foo)   (revision 2)
> @@ -1 +1 @@
> -r1
> +r2
> ]]]
> 
> Regards,
> Alexey.

I can reproduce this with a trunk build. Can you please file an issue
for this? I'm not going to get to this right away. Thanks!