After finishing the definition of an endpoint, the deploy module won't work. WSoD with message:
Fatal error: Class name must be a valid object or a string in /includes/common.inc on line 7618. When navigated to admin/structure, the following notice is seen:
Notice: Undefined index: controller class in entity_get_controller() (line 7617 of /includes/common.inc).
Updating to build of Feb 17, nor flushing the cache won't help.