Merge branch 'merge-2.10.wip-x' into merge-2.10.x-master

* merge-2.10.wip-x: (24 commits)
  SI-6023 reify abstract vals
  Removing controversial `either` method from Futures API.
  SI-6695 Test case for fixed Array match bug
  adds comments to standard attachments
  SI-6673 fixes macro problems with eta expansions
  Restore the opimization apparently lost after merge.
  SI-6624 set info of case pattern binder to help find case field accessors
  Scaladoc update for collection.mutable.MultiMap
  SI-6663: don't ignore type parameter on selectDynamic invocation
  SI-6551: don't insert apply call in polymorphic expression.
  SI-6634 Fixes data corruption issue in ListBuffer#remove
  Fixes SI-6628, Revert "Fix for view isEmpty."
  SI-6661 - Remove obsolete implicit parameter of scala.concurrent.promise method
  Fixes SI-6150 - backport to 2.10.x branch.
  SI-5330, SI-6014 deal with existential self-type
  Fixes SI-6559 - StringContext not using passed in escape function.
  SI-6648 copyAttrs must preserve TypeTree#wasEmpty
  Fix raw string interpolator: string parts which were after the first argument were still escaped
  sane printing of renamed imports
  SI-6440 Address regressions around MissingRequirementError
  ...

Conflicts:
	src/library/scala/collection/generic/IndexedSeqFactory.scala
	src/library/scala/collection/mutable/ListBuffer.scala
	src/reflect/scala/reflect/internal/Symbols.scala
	src/reflect/scala/reflect/internal/Types.scala
	test/files/run/t6150.scala

1 files changed, 0 insertions, 9 deletions

diff --git a/src/library/scala/collection/TraversableViewLike.scala b/src/library/scala/collection/TraversableViewLike.scala
index 6846a505bf..36f6210ef4 100644
--- a/src/library/scala/collection/TraversableViewLike.scala
+++ b/src/library/scala/collection/TraversableViewLike.scala
@@ -192,15 +192,6 @@ trait TraversableViewLike[+A,
   override def span(p: A => Boolean): (This, This) = (newTakenWhile(p), newDroppedWhile(p))
   override def splitAt(n: Int): (This, This) = (newTaken(n), newDropped(n))
 
-  // Without this, isEmpty tests go back to the Traversable default, which
-  // involves starting a foreach, which can force the first element of the
-  // view. This is just a backstop - it's overridden at all the "def view"
-  // instantiation points in the collections where the Coll type is known.
-  override def isEmpty = underlying match {
-    case x: GenTraversableOnce[_] => x.isEmpty
-    case _                        => super.isEmpty
-  }
-
   override def scanLeft[B, That](z: B)(op: (B, A) => B)(implicit bf: CanBuildFrom[This, B, That]): That =
     newForced(thisSeq.scanLeft(z)(op)).asInstanceOf[That]