diff -r ebe08056c60c -r 87bcc647df63 samples/effectivelist/src/org/apidesign/effectivelist/Listable.scala
--- a/samples/effectivelist/src/org/apidesign/effectivelist/Listable.scala	Sun Sep 02 22:00:13 2012 +0200
+++ b/samples/effectivelist/src/org/apidesign/effectivelist/Listable.scala	Wed Dec 05 13:17:53 2012 +0100
@@ -4,7 +4,7 @@
  * to previous and next items in the list effective.
  */
 // BEGIN: effectivelist.item
-trait Listable[T <: Listable[T]] {
+trait Listable[T] {
   private[effectivelist] var prev : T = _
   private[effectivelist] var next : T = _
 }