[TRUNK] TypeError: object of type 'int' has no len()

Using server, web-client and addons from trunk on Ubuntu 11.04 with python2.6, I installed survey module.

In Tools > Surveys > Define Surveys > Surveys, I choose any survey and whey I try to create a question, I get:

[2011-07-29 15:03:55,180][?] ERROR:web-services:Uncaught exception
Traceback (most recent call last):
  File "/home/max/openerp/server/trunk/openerp/osv/osv.py", line 118, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/max/openerp/server/trunk/openerp/osv/osv.py", line 172, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/max/openerp/server/trunk/openerp/osv/osv.py", line 163, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/max/openerp/addons/trunk/survey/survey.py", line 512, in default_get
    if len(context['line_order'][-1]) > 2 and type(context['line_order'][-1][2]) == type({}) and context['line_order'][-1][2].has_key('sequence'):
TypeError: object of type 'int' has no len()
> /home/max/openerp/addons/trunk/survey/survey.py(512)default_get()
-> if len(context['line_order'][-1]) > 2 and type(context['line_order'][-1][2]) == type({}) and context['line_order'][-1][2].has_key('sequence'):

(Pdb) l
507 def default_get(self, cr, uid, fields, context=None):
508 if context is None:
509 context = {}
510 data = super(survey_question, self).default_get(cr, uid, fields, context)
511 if context.get('line_order',False):
512 -> if len(context['line_order'][-1]) > 2 and type(context['line_order'][-1][2]) == type({}) and context['line_order'][-1][2].has_key('sequence'):
513 data['sequence'] = context['line_order'][-1][2]['sequence'] + 1
514
515 if context.has_key('page_id'):
516 data['page_id']= context.get('page_id', False)
517 return data
(Pdb) context['line_order'][-1]
62