expire(obj) fails when synonym is present

[jek]

from sqlalchemy import *
from sqlalchemy.orm import *

metadata = MetaData('sqlite:///')

t = Table('nodes', metadata,
          Column('id', Integer, primary_key=True),
          Column('name', String(60)))
metadata.create_all()
t.insert().execute(id=1, name='foo')

class Node(object): pass

mapper(Node, t, properties=dict(nom=synonym('name')))
s = create_session()

n = s.query(Node).get(1)

print n.nom
s.expire(n)


AttributeError: 'ProxyImpl' object has no attribute 'accepts_scalar_loader'

[Mike Bayer]

2b6e2defe593b4df2810df91193a8729ccea8e1c