Scala Compiler WTF

import org.scalatest.{Matchers, FlatSpec}

case class Foo(bar: Option[String])

object Foo {
  // Unexpectedly, Foo.Default.bar is null at runtime. Swapping the order of Default and Unknown, or making
  // either of them a lazy val, fixes the issue.
  val Default = Foo(Unknown)
  val Unknown = None
}


class FooTest extends FlatSpec with Matchers {
  "Foo.Default.bar" should "be None" in {
    Foo.Default.bar should equal (None)
  }
}