t7285.scala:15: error: match may not be exhaustive.
It would fail on the following input: (Up, Down)
      (d1, d2) match {
      ^
t7285.scala:33: error: match may not be exhaustive.
It would fail on the following input: Down
      (d1) match {
       ^
t7285.scala:51: error: match may not be exhaustive.
It would fail on the following input: (Up, Down)
    (d1, d2) match {
    ^
three errors found