M2O with domains are broken

[Fabien Meghazi (OpenERP)]

Sales -> Leads

Create new lead

In form view, click on "Fed. State" M20 arrow -> Traceback

Client Traceback (most recent call last):
  File "/media/sf_agr/Projects/openerp/source/client-web/trunk/addons/web/common/http.py", line 154, in dispatch
    response["result"] = method(controller, self, **self.params)
  File "/media/sf_agr/Projects/openerp/source/client-web/trunk/addons/web/controllers/main.py", line 715, in call
    if isinstance(args[i], web.common.nonliterals.BaseDomain):
  File "/media/sf_agr/Projects/openerp/source/client-web/trunk/addons/web/controllers/main.py", line 699, in call_common
    def unlink(self, req, model, ids=()):
  File "/media/sf_agr/Projects/openerp/source/client-web/trunk/addons/web/controllers/main.py", line 433, in eval_context_and_domain
    def check(self, req):
  File "/media/sf_agr/Projects/openerp/source/client-web/trunk/addons/web/common/session.py", line 180, in eval_domain
    return cdomain.evaluate(context or {})
  File "/media/sf_agr/Projects/openerp/source/client-web/trunk/addons/web/common/nonliterals.py", line 216, in evaluate
    final_domain.extend(domain.evaluate(ctx))
  File "/media/sf_agr/Projects/openerp/source/client-web/trunk/addons/web/common/nonliterals.py", line 134, in evaluate
    return eval(self.get_domain_string(), SuperDict(ctx))
  File "<string>", line 1, in <module>
NameError: name 'country_id' is not defined