t8372.scala:7: error: No ClassTag available for T1
  def unzip[T1, T2](a: Array[(T1, T2)]) = a.unzip
                                            ^
t8372.scala:9: error: No ClassTag available for T1
  def unzip3[T1, T2, T3](a: Array[(T1, T2, T3)]): (Array[T1], Array[T2], Array[T3]) = a.unzip3
                                                                                        ^
two errors found