I think I see the problem, too. There is a mix of ...

# language-proposals

[kirillrakhman]

I think I see the problem, too. There is a mix of platform types and regular types. The type of the expression Observable.just(TestUser("Brian")).flatMap { getUser() } is Observable<TestUser?>! but the compiler lets you assign it to a variable of type Observable<TestUser> but only coming from java