[bug] crash at svn update symlink-to-working-dir

Hello subversion developers,

When running 'svn up' via symlink to a working directory core is
dropped. Unfortunately I do not have debugging symbols on computer I
am currently working, but perhaps someone with up to date development
version can reproduce the issue, and if necessary continue debugging.

$ svnadmin create repo
$ svn checkout file:///home/kerolasa/tmp/repo foobar
foobar
Checked out revision 0.
$ ln -s foobar zyzzy
$ svn up zyzzy
Updating 'zyzzy':
Segmentation fault (core dumped)
$ svn --version
svn, version 1.8.0 (r1490375)
   compiled Jun 30 2013, 16:25:24 on i686-pc-linux-gnu

p.s. Use of symlinks broke after version 1.8.0 update, making this to
be a regression.

--
Sami Kerola
http://www.iki.fi/kerolasa/