The IoC container in Laravel is a hidden diamond in the rough that not a lot of people seem to know about. It allows for dependency injection and extremely testable code. However, there was a bug in it so that you could not resolve any class that used optional parameters in it’s constructors (including Eloquent). The bug had been fixed in Laravel 4 which is still not out for beta, so I decided to backport this to Laravel 3 for Taylor (since he’s really busy with L4).