TraversableOnce. Review by odersky.

1 files changed, 2 insertions, 4 deletions

diff --git a/src/library/scala/collection/TraversableViewLike.scala b/src/library/scala/collection/TraversableViewLike.scala
index 233125c0f3..6bf32dd71f 100644
--- a/src/library/scala/collection/TraversableViewLike.scala
+++ b/src/library/scala/collection/TraversableViewLike.scala
@@ -157,14 +157,12 @@ self =>
   protected def newDroppedWhile(p: A => Boolean): Transformed[A] = new DroppedWhile { val pred = p }
   protected def newTakenWhile(p: A => Boolean): Transformed[A] = new TakenWhile { val pred = p }
 
-  override def ++[B >: A, That](that: Traversable[B])(implicit bf: CanBuildFrom[This, B, That]): That = {
-    newAppended(that).asInstanceOf[That]
+  override def ++[B >: A, That](xs: TraversableOnce[B])(implicit bf: CanBuildFrom[This, B, That]): That = {
+    newAppended(xs.toTraversable).asInstanceOf[That]
 // was:    if (bf.isInstanceOf[ByPassCanBuildFrom]) newAppended(that).asInstanceOf[That]
 //         else super.++[B, That](that)(bf)
   }
 
-  override def ++[B >: A, That](that: Iterator[B])(implicit bf: CanBuildFrom[This, B, That]): That = ++[B, That](that.toStream)
-
   override def map[B, That](f: A => B)(implicit bf: CanBuildFrom[This, B, That]): That = {
     newMapped(f).asInstanceOf[That]
 //    val b = bf(repr)