Spark shell has weird scala semantics

case class Foo(x: Int)
def print(f: Foo) = f.x
val f = Foo(3)
print(f)
<console>:24: error: type mismatch;
 found   : Foo
 required: Foo

trait Currency
case object EUR extends Currency
case object USD extends Currency

def nextCurrency: Currency = nextInt(2) match {
  case 0 => EUR
  case _ => USD
}

<console>:22: error: type mismatch;
 found   : EUR.type
 required: Currency
         case 0 => EUR

<console>:24: error: type mismatch;
 found   : USD.type
 required: Currency
         case _ => USD