Cannot Update Source Tree After Move To Subversion 1.8

[Tim Daneliuk]

After the update to svn 1.8, I did a new svn co of the FBSD 9-STABLE
source branch.  When I try to do an update to it, I see this now:

    svn: E155005: Working copy not locked at /usr/scr
    svn co svn://svn.freebsd.org/base/stable/9 /usr/src

/usr/src is a symlink to another directory in a separate filesystem,
but this historically worked, so I'm guess that is not the problem.

Ideas?

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Tim Daneliuk