Inheritance brake class eqaulity

caseclassequality.scala

 trait Foo {
    case class Bar(i: Int, s: String)
  }

  val fb1 = new Foo {}.Bar(3, "ciao")
  val fb2 = new Foo {}.Bar(3, "ciao")

  val equal = fb1 == fb2
  println(s"equal: ${equal}") // equal: false

  case class ReBar(i: Int, s: String)

  val rb1 = ReBar(1, "ciao")
  val rb2 = ReBar(1, "ciao")

  val reequal = rb1 == rb2
  println(s"reequal: ${reequal}") // reequal = true