Test.scala

class A {
  def f = 1
}
trait T extends A
class B extends A {
  override def f = 2
}
class C extends B with T {
  // according to linearization, this should select `f` in 
  def t = super.f
  // def u = super[T].f // in 2.12 this yields "error: cannot emit super call"
}

object Test  {
  def main(args: Array[String]): Unit = {
    // prints 2
    println(new C().t)
  }
}