Can't make ambiguous

Hello.scala

trait Wat[T]
object Wat {
  implicit object BooleanWat extends Wat[Boolean]
}

object Hello {
  implicit object AmbBooleanWat1 extends Wat[Boolean]
  implicit object AmbBooleanWat2 extends Wat[Boolean]

  def main(args: Array[String]) {
    implicitly[Wat[Boolean]] // finds BooleanWat
  }
}

How? And which one it's taking?

trait Wat[T]
object Wat {
  implicit object BooleanWat extends Wat[Boolean] { override def toString:String = "In Wat "}
}

object Hello {
  implicit object AmbBooleanWat1 extends Wat[Boolean] { override def toString:String = "In Hello1 "}
  implicit object AmbBooleanWat2 extends Wat[Boolean] { override def toString:String = "In Hello2 "}

  def main(args: Array[String]) {
    println(implicitly[Wat[Boolean]]) // finds BooleanWat
  }
}

scala> Hello.main(null)
In Wat 

@pedrofurla back to being ambiguous in 2.11.0-M8.

🐐