A private case class improperly causes its companion private

[scabug]

Welcome to Scala 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_77).
Type in expressions for evaluation. Or try :help.

scala> object Outer {
     |   private[Outer] final case class Inner()
     |   object Inner
     | } 
defined object Outer

scala> Outer.Inner
<console>:13: error: object Inner in object Outer cannot be accessed in object Outer
       Outer.Inner
             ^

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-9939?orig=1
Reporter: @Atry
Affected Versions: 2.11.8, 2.12.0-RC1

[scabug]

@SethTisue said:
Dotty accepts this.