inherits twice?

twice.scala

class BaseElement {
  def foo() { println("I like foo") }
}

class SubElement extends BaseElement {
  def bar() { println("I like bar") }
}

trait Base[T <: BaseElement] {
  var map = Map[Int, T]()
}

trait OtherBase[T <: BaseElement] extends Base[T] {
  map.get(0).get.foo();
  map = map -- map.keys.filter(_>0)
}

trait SubBase extends OtherBase[SubElement] {
  var test = 0
}

class Sub extends Base[SubElement] with SubBase {
  map.get(0).get.bar();
}

// Class Sub inherits Base twice?!