[ZODB-Dev] KeyError in BTrees.check

[Suresh V.]

While trying to run manage_cleanup on my BTreeFolder2, I get a KeyError 
from the classify function in Module BTrees.check:

def classify(obj):
     return _type2kind[type(obj)]

I see that obj is None at this point.

Anyway I can patch the code to run around this?

Thanks.

Suresh