[O2M] Performing an action in an o2m list row errors out when the row has not been saved

trunk, web, chrome, mrp_operation

View : Manufacturing order (Manufacturing/Manufacturing/Manufacturing Orders), tab workorder.
create a new one, save it and start it from the list

here under, the bug i get if i start an order line from work order tab

OpenERP Server Error
Client Traceback (most recent call last):
  File "/home/aline/source/web/trunk/addons/web/common/http.py", line 154, in dispatch
    response["result"] = method(controller, self, **self.params)
  File "/home/aline/source/web/trunk/addons/web/controllers/main.py", line 731, in exec_workflow
    r = req.session.exec_workflow(model, id, signal)
  File "/home/aline/source/web/trunk/addons/web/common/session.py", line 82, in exec_workflow
    r = self.proxy('object').exec_workflow(self._db, self._uid, self._password, model, signal, id)
  File "/home/aline/source/web/trunk/addons/web/common/openerplib/main.py", line 294, in proxy
    result = self.connector.send(self.service_name, method, *args)
  File "/home/aline/source/web/trunk/addons/web/common/openerplib/main.py", line 264, in send
    raise fault

Server Traceback (most recent call last):
  File "/home/aline/source/web/trunk/addons/web/common/openerplib/main.py", line 245, in send
    result = openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/home/aline/source/server/trunk/openerp/netsvc.py", line 325, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/home/aline/source/server/trunk/openerp/service/web_services.py", line 580, in dispatch
    res = fn(db, uid, *params)
  File "/home/aline/source/server/trunk/openerp/osv/osv.py", line 120, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/aline/source/server/trunk/openerp/osv/osv.py", line 192, in exec_workflow
    res = self.exec_workflow_cr(cr, uid, obj, method, *args)
  File "/home/aline/source/server/trunk/openerp/osv/osv.py", line 185, in exec_workflow_cr
    return wf_service.trg_validate(uid, obj, args[0], method, cr)
  File "/home/aline/source/server/trunk/openerp/workflow/wkf_service.py", line 122, in trg_validate
    cr.execute('select id from wkf_instance where res_id=%s and res_type=%s and state=%s', (res_id, res_type, 'active'))
  File "/home/aline/source/server/trunk/openerp/sql_db.py", line 153, in wrapper
    return f(self, *args, **kwargs)
  File "/home/aline/source/server/trunk/openerp/sql_db.py", line 215, in execute
    res = self._obj.execute(query, params)
DataError: invalid input syntax for integer: "one2many_v_id_22478"
LINE 1: select id from wkf_instance where res_id=E'one2many_v_id_224...
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