svn copy bug in ra_dav?

Hi,
   I've had some students working in subversion. One of them broke
trunk (and then went home), so that revision was reverted with:

svn merge -r989:987 https://myServer/svn/robocup/trunk/robot .

Now, when I try to resurrect that revision so that the student can fix
it:

% svn merge -r987:989 https://myServer/svn/robocup/trunk/robot robot
subversion/libsvn_ra_dav/util.c:398: (apr_err=175002)
svn: RA layer request failed
svn: PROPFIND request failed on
'https://myServer/svn/robocup/trunk/robot/highLevelStrategy'
subversion/libsvn_ra_dav/util.c:81: (apr_err=175002)
svn: PROPFIND of
'https://myServer/svn/robocup/trunk/robot/highLevelStrategy': 404 Not
Found

'highLevelStrategy' is a directory that the student added in the
original commit, and which was deleted in the revert. So, I then tried
to just copy that directory from the old revision into HEAD and it
failed (same error as above). I then went about replicating this in a
local repository:

% mkdir testdir
% cd testdir
% svnadmin create repos
% svn co file://`pwd`/repos wc
Checked out revision 0.
% cd wc
% svn mkdir dirA
A dirA
% touch dirA/myFile
% svn add dirA/myFile
A dirA/myFile
% svn commit -m "add some stuff"
Adding dirA
Adding dirA/myFile
Transmitting file data .
Committed revision 1.
% svn rm dirA
D dirA/myFile
D dirA
% svn commit -m "remove some stuff"
Deleting dirA

Committed revision 2.
% svn ls file:///Users/willu/testdir/repos/
% svn ls -r 1 file:///Users/willu/testdir/repos/
dirA/
% svn cp -r 1 file:///Users/willu/testdir/repos/dirA .
A dirA/myFile
Checked out revision 1.
A dirA

HUH?!? everything worked. So lets try it again over dav:

% cd ..
% rm -rf wc
% svn co https://myServer/svn/test/ wc
Checked out revision 0.
% cd wc
% svn mkdir dirA
A dirA
% touch dirA/testFile
% svn add dirA/testFile
A dirA/testFile
% svn commit -m "Add some files"
Adding dirA
Adding dirA/testFile
Transmitting file data .
Committed revision 1.
% svn rm dirA
D dirA/testFile
D dirA
% svn commit -m "remove some files"
Deleting dirA

Committed revision 2.
% ls
% svn ls -r 1 https://myServer/svn/test/dirA
testFile
% svn cp -r 1 https://myServer/svn/test/dirA .
subversion/libsvn_ra_dav/util.c:398: (apr_err=175002)
svn: RA layer request failed
svn: PROPFIND request failed on 'https://myServer/svn/test/dirA'
subversion/libsvn_ra_dav/util.c:81: (apr_err=175002)
svn: PROPFIND of 'https://myServer/svn/test/dirA': 404 Not Found

This is the same error I got above.

This is with the server running 0.21.0, and my local svn at revision
5671 (post 0.21.0). The client is running MacOS X, but that's just
where I did my replication. The students were getting errors on RedHat
8 (and the server is running RedHat 8).

Any ideas? Is this known?

I remember people talking about bugs getting things from old revisions
that didn't exist in head, but I thought that was where it was trying
to follow copy history, not where it was being given the exact
revision. I am also surprised by the ra_local/ra_dav difference.

Be well,

Will :-}

--
Dr William Uther                            National ICT Australia
Phone: +61 2 9385 6926             School of Computer Science and 
Engineering
Email: willu@cse.unsw.edu.au             University of New South Wales
Jabber: willu@jabber.cse.unsw.edu.au          Sydney, Australia
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