Don't generate outer accessors for classes transitively nested in terms

[odersky]

Fixes #11367

[odersky]

Who can add a bytecode test for this? Or some other way to verify that no outer field is generated?

[retronym]

You could assert the absence of the outer field using Java reflection:

class C { 
  def foo = {
    class D {
      class E
    }
    class F
    val outerFields = classOf[F].getDeclaredFields.filter(_.getName.contains("$outer"))
    assert(outerFields.isEmpty, outerFields.toString)
  }
}
object Test {
  def main(args: Array[String]): Unit = {
    new C().foo
  }
}

[odersky]

Thanks for the suggestion, Jason!