Discrepancies when outlining case classes with single, implicit parameter list when a parameter is missing val keyword

[wiwa]

case class C[A](implicit x: Int)

different nsc (-) vs rsc (+): C.scala: _empty_/C#
       symlinks: "_empty_/C#`<init>`()."
       symlinks: "_empty_/C#productArity()."
       symlinks: "_empty_/C#productElement()."
       symlinks: "_empty_/C#productIterator()."
       symlinks: "_empty_/C#productPrefix()."
-      symlinks: "_empty_/C#x."
     }
   }
 }
 access {
   public_access {
missing rsc: C.class: _empty_/C#x.

[wiwa]

#420 is similar, but this might be a separate issue.