spec-overrides.scala:8: error: Type parameter has to be specialized at least for the same types as in the overridden method. Missing types: Int
  override def a[@specialized(Double) T](t: T): List[T] = Nil
                                      ^
spec-overrides.scala:12: error: Type parameter has to be specialized at least for the same types as in the overridden method. Missing types: Int
  override def a[T](t: T): List[T] = Nil
                 ^
two errors found