Document containing DBRef causes segmentation fault (OS X)

[mattbodman]

# pymongo version 2.4.1
# python 2.7.3

from bson.dbref import DBRef
from micromongo import *

c = connect()

class Foo(Model):
    collection = 'tests.foos'

class Bar(Model):
    collection = 'tests.bars'

f = Foo.new()
f.save()

b = Bar.new()
b.foo = DBRef(database='tests', id=f._id, collection='foos')
b.save()

cc.tests.bars.find_one() # no problem here, but...

c.tests.bars.find_one() # ouch - segmentation fault: 11

b.find_one() # ouch - segmentation fault: 11