This code stil get's it into recursion somehow:

                        if model.model == x2m_model.model:
                            # we need to remove current resource_id from the many2many to prevent an infinit loop
                            if resource_id in field_resource_ids:
                                field_resource_ids.remove(resource_id)
                        data.update(self.get_data(cr, SUPERUSER_ID, pool, field_resource_ids, x2m_model, method))




>>> traceback <<<
  File "/usr/lib/python2.7/threading.py", line 524, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 504, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/SocketServer.py", line 582, in process_request_thread
    self.finish_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 323, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/usr/lib/python2.7/SocketServer.py", line 638, in __init__
    self.handle()
  File "/usr/lib/python2.7/dist-packages/werkzeug/serving.py", line 181, in handle
    rv = BaseHTTPRequestHandler.handle(self)
  File "/usr/lib/python2.7/BaseHTTPServer.py", line 340, in handle
    self.handle_one_request()
  File "/usr/lib/python2.7/dist-packages/werkzeug/serving.py", line 214, in handle_one_request
    return self.run_wsgi()
  File "/usr/lib/python2.7/dist-packages/werkzeug/serving.py", line 159, in run_wsgi
    execute(app)
  File "/usr/lib/python2.7/dist-packages/werkzeug/serving.py", line 146, in execute
    application_iter = app(environ, start_response)
  File "/erp/41/openerp/service/wsgi_server.py", line 415, in application
    return werkzeug.contrib.fixers.ProxyFix(application_unproxied)(environ, start_response)
  File "/usr/lib/python2.7/dist-packages/werkzeug/contrib/fixers.py", line 125, in __call__
    return self.app(environ, start_response)
  File "/erp/41/openerp/service/wsgi_server.py", line 403, in application_unproxied
    result = handler(environ, start_response)
  File "/erp/41/openerp/addons/web/http.py", line 502, in __call__
    return self.dispatch(environ, start_response)
  File "/erp/41/openerp/addons/web/http.py", line 472, in __call__
    return self.app(environ, start_wrapped)
  File "/usr/lib/python2.7/dist-packages/werkzeug/wsgi.py", line 411, in __call__
    return self.app(environ, start_response)
  File "/erp/41/openerp/addons/web/http.py", line 527, in dispatch
    result = handler(request)
  File "/erp/41/openerp/addons/web/http.py", line 591, in <lambda>
    return lambda request: JsonRequest(request).dispatch(method)
  File "/erp/41/openerp/addons/web/http.py", line 203, in dispatch
    response["result"] = method(self, **self.params)
  File "/erp/41/openerp/addons/web/controllers/main.py", line 1129, in call_kw
    return self._call_kw(req, model, method, args, kwargs)
  File "/erp/41/openerp/addons/web/controllers/main.py", line 1121, in _call_kw
    return getattr(req.session.model(model), method)(*args, **kwargs)
  File "/erp/41/openerp/addons/web/session.py", line 43, in proxy
    result = self.proxy.execute_kw(self.session._db, self.session._uid, self.session._password, self.model, method, args, kw)
  File "/erp/41/openerp/addons/web/session.py", line 31, in proxy_method
    result = self.session.send(self.service_name, method, *args)
  File "/erp/41/openerp/addons/web/session.py", line 90, in send
    return openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/erp/41/openerp/netsvc.py", line 293, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/erp/41/openerp/service/web_services.py", line 658, in dispatch
    res = fn(db, uid, *params)
  File "/erp/41/openerp/osv/osv.py", line 188, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/erp/41/openerp/osv/osv.py", line 131, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/erp/41/openerp/osv/osv.py", line 197, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 513, in execute_cr
    return self.log_fct(cr, uid, model, method, fct_src, *args, **kw)
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 294, in log_fct
    old_values = self.get_data(cr, uid_orig, pool, res_ids, model, method)
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 354, in get_data
    data.update(self.get_data(cr, SUPERUSER_ID, pool, field_resource_ids, x2m_model, method))
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 354, in get_data
    data.update(self.get_data(cr, SUPERUSER_ID, pool, field_resource_ids, x2m_model, method))
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 354, in get_data
    data.update(self.get_data(cr, SUPERUSER_ID, pool, field_resource_ids, x2m_model, method))
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 354, in get_data
    data.update(self.get_data(cr, SUPERUSER_ID, pool, field_resource_ids, x2m_model, method))
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 354, in get_data
    data.update(self.get_data(cr, SUPERUSER_ID, pool, field_resource_ids, x2m_model, method))
  File "/erp/41/openerp/addons/audittrail/audittrail.py", line 328, in get_data
    for resource in resource_pool.read(cr, SUPERUSER_ID, res_ids):
  File "/erp/41/openerp/osv/orm.py", line 3604, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/erp/41/openerp/osv/orm.py", line 3712, in _read_flat
    res2 = self._columns[val[0]].get(cr, self, ids, val, user, context=context, values=res)
  File "/erp/41/openerp/osv/fields.py", line 1131, in get
    result = self._fnct(obj, cr, uid, ids, name, self._arg, context)
  File "/erp/41/openerp/addons/mail/mail_thread.py", line 151, in _get_followers
    user_pid = self.pool.get('res.users').read(cr, uid, uid, ['partner_id'], context=context)['partner_id'][0]
  File "/erp/41/openerp/addons/base/res/res_users.py", line 799, in read
    res = super(users_view, self).read(cr, uid, ids, fields, context=context, load=load)
  File "/erp/41/openerp/addons/base/res/res_users.py", line 272, in read
    result = super(res_users, self).read(cr, uid, ids, fields=fields, context=context, load=load)
  File "/erp/41/openerp/osv/orm.py", line 3604, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/erp/41/openerp/osv/orm.py", line 3724, in _read_flat
    res2 = self._columns[f].get(cr, self, ids, f, user, context=context, values=res)
  File "/erp/41/openerp/osv/fields.py", line 466, in get
    context=context))
  File "/erp/41/openerp/addons/base/res/res_partner.py", line 423, in name_get
    traceback.print_stack()
>>> end of traceback <<<