t2641.scala:18: error: wrong number of type arguments for ManagedSeq, should be 2
        with TraversableViewLike[A, ManagedSeqStrict[A], ManagedSeq[A]]
                                                         ^
t2641.scala:27: error: value managedIterator is not a member of ManagedSeq[A,Coll]
    override def managedIterator = self.managedIterator slice (from, until)
                                        ^
two errors found