Can't edit a user with a unicode email address

[dread]

1. Register User with an email address with a unicode char (e.g. u'\u044e')
2. View the User in the UI (/user/) or with 'user_show' Action API

Exception:

Module ckan.controllers.user:98 in read
<<          try:
                   user_dict = get_action('user_show')(context,data_dict)
               except NotFound:
                   h.redirect_to(controller='user', action='login', id=None)
>>  user_dict = get_action('user_show')(context,data_dict)
Module ckan.logic.action.get:488 in user_show
<<      check_access('user_show',context, data_dict)
       
           user_dict = user_dictize(user_obj,context)
       
           if not (Authorizer().is_sysadmin(unicode(user)) or user == user_obj.name):
>>  user_dict = user_dictize(user_obj,context)
Module ckan.lib.dictization.model_dictize:189 in user_dictize
<<      
           result_dict['display_name'] = user.display_name
           result_dict['email_hash'] = user.email_hash
           result_dict['number_of_edits'] = user.number_of_edits()
           result_dict['number_administered_packages'] = user.number_administered_packages()
>>  result_dict['email_hash'] = user.email_hash
Module ckan.model.user:59 in email_hash
<<          if self.email:
                   e = self.email.strip().lower()
               return hashlib.md5(e).hexdigest()
               
           def get_reference_preferred_for_uri(self):
>>  return hashlib.md5(e).hexdigest()
UnicodeEncodeError: 'ascii' codec can't encode character u'\u044e' in position 17: ordinal not in range(128)