anyval-anyref-parent.scala:5: error: Any does not have a constructor
class Bar1 extends Any      // fail
           ^
anyval-anyref-parent.scala:9: error: illegal inheritance; superclass Any
 is not a subclass of the superclass Object
 of the mixin trait Immutable
trait Foo4 extends Any with Immutable // fail
                            ^
anyval-anyref-parent.scala:10: error: illegal inheritance; superclass AnyVal
 is not a subclass of the superclass Object
 of the mixin trait Immutable
trait Foo5 extends AnyVal with Immutable   // fail
                               ^
three errors found