P_2.scala:14: error: reference to x is ambiguous;
it is both defined in object C and imported subsequently by
import Q.X._
          println("L14: "+x)   // reference to 'x' is ambiguous here
                          ^
P_2.scala:19: error: reference to y is ambiguous;
it is imported twice in the same scope by
import P.X._
and import X.y
            println("L19: "+y) // reference to 'y' is ambiguous here
                            ^
two errors found