Cannot get log of deleted branch by URL

Hello,

I ve created a feature branch with "svn copy" and committed some
content. Afterwards I "merge --reintegrated" this feature branch to the
trunk and deleted it.

After the branch was deleted, I wasn't able to get the log of this
feature branch by URL. I had to check-out the repository at a revision,
when this feature branch was alive and had to perform the "svn log" with
a relative PATH.

Is this intended??

Best Regards,
Charly

--
error->message = "File not found: revision 17, path
'/branches/work_route/hugo.txt'",  error->file =
"/build/buildd/subversion-1.6.12dfsg/subversion/libsvn_fs_fs/tree.c",
error->line = 2798
//
// For Info
//
$ cd ~/tmp/testproject_work_route
$ svn info hugo.txt
Path: hugo.txt
Name: hugo.txt
URL: svn://localhost/testproject/branches/work_route/hugo.txt
Repository Root: svn://localhost/testproject
Repository UUID: 7f4233b1-b113-4339-bb6d-b1a9da9de539
Revision: 15
Node Kind: file
Schedule: normal
Last Changed Author: charly
Last Changed Rev: 13
Last Changed Date: 2012-01-05 10:18:37 +0100 (Thu, 05 Jan 2012)
Text Last Updated: 2012-01-05 18:06:02 +0100 (Thu, 05 Jan 2012)
Checksum: 2dfea433eea7aa03a98ba2025c6ffd91
//
// Working with PATH
//
$ svn log -r13 hugo.txt
------------------------------------------------------------------------
r13 | charly | 2012-01-05 10:18:37 +0100 (Thu, 05 Jan 2012) | 3 lines
+IMPROVED:
 * Adding some text for the trunk - but not for the release
------------------------------------------------------------------------
//
// Not working with URL
//
$ svn log -r13 svn://localhost/testproject/branches/work_route/hugo.txt
svn: File not found: revision 17, path '/branches/work_route/hugo.txt'
//
// Doing the same with a directory, which is not deleted yet:
//
$ cd ~/tmp/testproject_trunk/
$ svn log -r14 svn://localhost/testproject/branches/release-1.x/hugo.txt
------------------------------------------------------------------------
r14 | charly | 2012-01-05 10:23:16 +0100 (Thu, 05 Jan 2012) | 3 lines
+MERGED:
 * merging from route branch
------------------------------------------------------------------------
$ svn log -r13 -v svn://localhost/testproject/branches/
------------------------------------------------------------------------
r13 | charly | 2012-01-05 10:18:37 +0100 (Thu, 05 Jan 2012) | 3 lines
Changed paths:
   M /branches/work_route/hugo.txt
+IMPROVED:
 * Adding some text for the trunk - but not for the release
------------------------------------------------------------------------