Is this an intended behavior or is it a bug? Consider the following trait (be it a class, doesn't matter):

trait P[T] {
    class Inner(val f: T => Unit = _ => println("nope"))
}

This is what I would have expected:

scala> val p = new P[Int] {
     |     val inner = new Inner
     | }
p: java.lang.Object with P[Int]{def inner: this.Inner} = $anon$1@12192a9

scala> p.inner.f(5)
nope

But this?

scala> val p = new P[Int] {
     |     val inner = new Inner() {
     |         println("some primary constructor code in here")
     |     }
     | }
<console>:6: error: type mismatch;
 found   : (T) => Unit
 required: (Int) => Unit
           val inner = new Inner() {
                           ^