Problem with conformance to nested protocols

Elements Silver
1

The following generates an error:

protocol Foo {
    func foo() -> Self
}

protocol Bar: Foo {
}

final class Baz: Bar {
    func foo() -> Baz { return self}    // Error: Method "foo() -> Self" not implemented as required for interface "Bar"
}
2

Self in protocols is currently not supported known issue. Sorry.