Assertion failure during update_tests.py 58 (XFAIL: update a nonexistent child of a copied dir)

Hi,

Already for some time now, update_tests.py 58 (XFAIL: update a
nonexistent child of a copied dir) crashes on my machine:

    svn: In file '..\..\..\subversion\libsvn_wc\update_editor.c' line
4877: assertion failed (repos_root != NULL && repos_uuid != NULL)

I understand that this test is XFAIL, that this isn't addressed yet,
but is it supposed to fail an assert?

On my system (Win XP) this causes an ugly popup to appear (which I
need to click away to continue), each time I run the full test suite
("This application has requested the Runtime to terminate it in an
unusual way...")

Relevant excerpt from tests.log in attachment (this was with trunk_at_1062600).

Cheers,

-- 
Johan