t5078.scala:7: error: an unapply method must accept a single argument.
    val Foo(x1) = 1
        ^
t5078.scala:7: error: recursive value x1 needs type
    val Foo(x1) = 1
           ^
t5078.scala:8: error: an unapply method must accept a single argument.
    val Foo2(y2) = 2
        ^
t5078.scala:8: error: recursive value y2 needs type
    val Foo2(y2) = 2
            ^
four errors found