Session throws an Exception when it's not started

laravel/session.php

@@ -111,7 +111,7 @@ class Session {
 	 */
 	public static function __callStatic($method, $parameters)
 	{
-		return call_user_func_array(array(static::$instance, $method), $parameters);
+		return call_user_func_array(array(static::instance(), $method), $parameters);
 	}
 
 }