Overload resolution should dealias types

[japgolly]

Compiler version

3.0.0-RC3

Minimized code

object OK {
  def apply(n: Int ): Unit = ()
  def apply(n: Long): Unit = ()
  apply(3)  // ok
  apply(3L) // ok
}

object KO {
  type Key = Int
  def apply(n: Key ): Unit = ()
  def apply(n: Long): Unit = ()
  apply(3)  // error
  apply(3L) // ok
}

Output

[error] 12 |  apply(3)  // error
[error]    |  ^^^^^
[error]    |Ambiguous overload. The overloaded alternatives of method apply in object KO with types
[error]    | (n: Long): Unit
[error]    | (n: KO.Key): Unit
[error]    |both match arguments ((3 : Int))
[error] one error found

Expectation

Success. This works with Scala 2.x.