[Twisted-Python] DirDBM possible bug

[Giorgos Logiotatidis]

Hello,
	I get an 'RuntimeError: maximum recursion depth exceeded' when
executing the following code. 

#!/usr/bin/env python
from twisted.persisted import dirdbm
from twisted.words.xish import domish

e = domish.Element(('', 'foo'))
d = dirdbm.Shelf("/tmp/foo")
d["200711090000"] = e
l = d["200711090000"]

Have I wrote something wrong or this is a dirdbm bug?

Thanks in advance,
-gl