在非对象上调用成员函数getCollection（）以在magento中加载模型

I am getting a error in Magento in load store module.

/** @var $websiteCollection Mage_Core_Model_Store */
$storeCollection = Mage::getModel('core/store')->getCollection()
    ->initCache($this->getCache(), 'app', array(Mage_Core_Model_Store::CACHE_TAG))
    ->setLoadDefault(true);

And I am getting.

Fatal error: Call to a member function getCollection() on a non-object in /var/www/html/includes/src/__default.php on line 20379

When I am trying to call module it return false.

var_dump(get_class(Mage::getModel('core/store')));exit;

How to fix it?