@ShengC Provided an example that involves a binding error when it probably shouldn't be. ``` scala trait A { def a {} } trait B type AB = A with B class Model extends AbstractModule with ScalaModule { def configure() { bind[A].toInstance(new A {}) bind[AB].toInstance(new A with B {}) } } Guice.createInjector(new Model()) // This fails at run time. Guice thinks binds are dups. ```