Swift compile error in Xcode 7.1

typealias-compile-error.swift

protocol MyProtocol: class {
  typealias MyAlias
  var something: MyAlias { get }
}

extension MyProtocol where MyAlias: YourProtocol {
  func bar() {
    // !!! Compile Error happens !!!
    // expected an argument list of type '(Self.AliasTypeAlias)'
    // self.something.foo { _ in print("X") }
    //                ^
    self.something.foo { _ in print("X") }
  }
}

protocol YourProtocol: class {
  typealias Model
  typealias AliasTypeAlias = Model -> ()
  func foo(callback: AliasTypeAlias)
  // below works. looks like compiler is confused by type variable and real alias
  // func foo(callback: Model -> ())
}