bug1878.scala:3: error: _* may only come last
  val err1 = "" match { case Seq(f @ _*, ',') => f }
                                 ^
bug1878.scala:9: error: _* may only come last
  val List(List(_*, arg2), _) = List(List(1,2,3), List(4,5,6))
                 ^
two errors found