-Xlint:unused false positive with private class in companion object

[ruippeixotog]

The following code, when compiled with -Xlint, yields a warning:

import Container._

class Container {
  println(classOf[MyClass])
}

object Container {
  private class MyClass
}

[warn] Main.scala:8: private class MyClass in object Container is never used
[warn]   private class MyClass
[warn]                 ^
[warn] one warning found

In real world projects, this is happening to me because I'm using Java libraries and I need to pass a Class to be instantiated by reflection.

[som-snytt]

Duplicates #9058