Traceback (most recent call last):
  File "/trytond/protocols/jsonrpc.py", line 162, in _marshaled_dispatch
    response['result'] = dispatch_method(method, params)
  File "/trytond/protocols/jsonrpc.py", line 191, in _dispatch
    res = dispatch(*args)
  File "/trytond/protocols/dispatcher.py", line 41, in dispatch
    res = security.login(database_name, user, session)
  File "/trytond/security.py", line 24, in login
    pool = _get_pool(dbname)
  File "/trytond/security.py", line 18, in _get_pool
    pool.init()
  File "/trytond/pool.py", line 144, in init
    self.start()
  File "/trytond/pool.py", line 97, in start
    register_classes()
  File "/trytond/modules/__init__.py", line 358, in register_classes
    mod_file, pathname, description)
  File "/dist-packages/trytond/modules/currency/__init__.py", line 5, in <module>
    from .currency import *
  File "/dist-packages/trytond/modules/currency/currency.py", line 6, in <module>
    from trytond.tools import safe_eval, datetime_strftime
ImportError: cannot import name safe_eval