The outer reference in this type test cannot be checked at run time.

[allanrenucci]

class Test {
  final case class Foo(x: Int)
}

When compiled with scalac a warning is emitted:

$ scalac -d out tests/allan/Test.scala -unchecked
tests/allan/Test.scala:2: warning: The outer reference in this type test cannot be checked at run time.
  final case class Foo(x: Int)

The warning is only emitted if the class is final. Dotty does not emit a warning. Is the warning legitimate? Should we also emit a warning?

[smarter]

No, we shouldn't. This warns about a bug in scalac (scala/bug#4440) that does not exist in Dotty (#2156)