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// I suspect the stack overflow is occurring when the compiler is determining the types for the following line at the end of the file:-
// val data = List(N26,N25)
abstract class A
{
// commenting out the following line (only) leads to successful compilation
protected val data: List[A]
}
trait B[T <: B[T]] extends A { self: T => }
abstract class C extends A
{
// commenting out the following line (only) leads to successful compilation
protected val data: List[C]
}
abstract class D extends C with B[D] {}
abstract class Ee extends C with B[Ee]
{
}
object N1 extends D
{
val data = Nil
}
object N2 extends D
{
val data = Nil
}
object N5 extends D
{
val data = List(N1)
}
object N6 extends D
{
val data = List(N1)
}
object N8 extends D
{
val data = List(N1)
}
object N10 extends D
{
val data = Nil
}
object N13 extends D
{
val data = List(N2)
}
object N14 extends D
{
val data = List(N5,N10,N8)
}
object N15 extends D
{
val data = List(N14)
}
object N16 extends D
{
val data = List(N13,N6,N15)
}
object N17 extends D
{
val data = List(N16)
}
object N21 extends D
{
val data = List(N16)
}
object N22 extends D
{
val data = List(N17)
}
object N25 extends D
{
val data = List(N22)
}
object N26 extends Ee
{
val data = List(N21,N17)
}
// Commenting out the following object (only) leads to successful compilation
object N31 extends Ee
{
// If we use List[C](N26,N25), we achieve successful compilation
val data = List(N26,N25)
}
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