Bug when merging to pre-1.5 repositories

Hi!

I'm (now, finally) aware of the fact that svn:mergeinfo only came up with 1.5
but this issue is about the behaviour when this is simply not supported.
Anyway, here's what I did:

1. I have a repository, FSFS, created (or, rather, svnadmin loaded) with a
Subversion 1.4.
2. The commandline client is 1.6, running on Debian.
3. The repository is accessed using a file:// URL.
4. Check out a WC of a branch and change into it.
5. "svn merge -c 1234 --record-only ^/trunk/foo"

What happens is that this actually merged changes into the working copy, or,
rather, it caused conflicts trying to merge them in my case. I understand
that it simply can't do what I'm asking it to do, since the 1.4 repository
doesn't support svn:mergeinfo. However, and that is the issue, I would expect
an error ("can't record mergeinfo, not supported by the repository" or
somesuch). What it definitely shouldn't do is merge anything into my files,
since I explicitly asked it to not make any changes.

Also, but that is a minor issue, I would hope for a warning like "old
repository version, some features might be unavailable". By the way, I simply
ran "svnadmin upgrade" on the repository and now the above works. Do I gain
anything else by running a dump/load cycle?

Cheers!

Uli

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