overload.scala:15: x is already defined as value x in class Test
  var x: int = 3;
      ^
overload.scala:5: foo is already defined in local scope
    def foo() = 2;
        ^
overload.scala:11: ambiguous reference to overloaded definition,
both method foo: ()scala.Int
and  method foo: ()scala.Int
match argument types ()
  foo();
     ^
overload.scala:13: ambiguous reference to overloaded definition,
both value x$: scala.Int
and  variable x$: scala.Int
match expected type scala.Int
  val x: int = 1;
      ^
four errors found