Missing *ToCBF

[MasseGuillaume]

The following gives compilations errors in 2.12:

type mismatch;
[error]  found   : scala.collection.mutable.TreeMap.type
[error]  required: scala.collection.generic.CanBuildFrom[Nothing,Int,?]

import scala.collection.compat._

{
  import scala.collection.immutable._
  List(1).to(::)
  List(1).to(HashMap)
  List(1).to(IntMap)
  List(1).to(ListMap)
  List(1).to(LongMap)
  List(1).to(Map)
  List(1).to(Nil)
  List(1).to(NumericRange)
  List(1).to(PagedSeq)
  List(1).to(Range)
  List(1).to(SortedMap)
  List(1).to(StringLike)
  List(1).to(StringOps)
  List(1).to(TreeMap)
  List(1).to(WrappedString)
}

{
  import scala.collection.mutable._
  List(1).to(AnyRefMap)
  List(1).to(ArrayBuilder)
  List(1).to(ArrayOps)
  List(1).to(ObservableBuffer)
  List(1).to(PriorityQueue)
  List(1).to(UnrolledBuffer)
  List(1).to(WrappedArray)
  List(1).to(HashMap)
  List(1).to(History)
  List(1).to(IndexedSeqView)
  List(1).to(LinkedHashMap)
  List(1).to(ListMap)
  List(1).to(LongMap)
  List(1).to(Map)
  List(1).to(MultiMap)
  List(1).to(OpenHashMap)
  List(1).to(SortedMap)
  List(1).to(TreeMap)
  List(1).to(WeakHashMap)
}

I think IntMap could be implemented like this:

implicit def intMapCompanionCBF[A](fact: i.IntMap.type): CanBuildFrom[Any, (Int, A), i.IntMap[A]] =
  simpleCBF(i.IntMap.canBuildFrom[Any, A]())

[MasseGuillaume]

It's not possible to create those via the old .to[CC] syntax.

List((1, 1)).to[Map]
//error: Map takes two type parameters, expected: one
       List((1, 1)).to[Map]
                       ^

This bug is invalid.