t7860.scala:5: warning: private class for your eyes only in object Test is never used
  private implicit class `for your eyes only`(i: Int) {       // warn
                         ^
t7860.scala:31: warning: private class C in object Test3 is never used
  private implicit class C(val i: Int) extends AnyVal {       // warn
                         ^
error: No warnings can be incurred under -Xfatal-warnings.
two warnings found
one error found