Merge remote-tracking branch 'origin/2.11.x' into merge/2.11.x-to-2.12.x-20160225

 Conflicts:
 	scripts/jobs/integrate/bootstrap
 	src/build/maven/scala-actors-pom.xml
 	test/files/pos/t3420.flags

Conflicts were trivial to resolve.

27 files changed, 49 insertions, 39 deletions

diff --git a/src/library/scala/Product1.scala b/src/library/scala/Product1.scala
index dbc34ba66a..e82300adf6 100644
--- a/src/library/scala/Product1.scala
+++ b/src/library/scala/Product1.scala
@@ -24,7 +24,7 @@ trait Product1[@specialized(Int, Long, Double) +T1] extends Any with Product {
   override def productArity = 1
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product10.scala b/src/library/scala/Product10.scala
index 70de79d49a..5fc4874048 100644
--- a/src/library/scala/Product10.scala
+++ b/src/library/scala/Product10.scala
@@ -24,7 +24,7 @@ trait Product10[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10] extends Any w
   override def productArity = 10
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product11.scala b/src/library/scala/Product11.scala
index 1bb79ac017..dcebc90e3e 100644
--- a/src/library/scala/Product11.scala
+++ b/src/library/scala/Product11.scala
@@ -24,7 +24,7 @@ trait Product11[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11] extends
   override def productArity = 11
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product12.scala b/src/library/scala/Product12.scala
index d7e1e1b05c..2221170452 100644
--- a/src/library/scala/Product12.scala
+++ b/src/library/scala/Product12.scala
@@ -24,7 +24,7 @@ trait Product12[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12] e
   override def productArity = 12
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product13.scala b/src/library/scala/Product13.scala
index 8571b45a40..e76f326766 100644
--- a/src/library/scala/Product13.scala
+++ b/src/library/scala/Product13.scala
@@ -24,7 +24,7 @@ trait Product13[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 13
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product14.scala b/src/library/scala/Product14.scala
index a2f5140370..a076e2cc7a 100644
--- a/src/library/scala/Product14.scala
+++ b/src/library/scala/Product14.scala
@@ -24,7 +24,7 @@ trait Product14[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 14
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product15.scala b/src/library/scala/Product15.scala
index 1c6ad0011c..4568aff1fe 100644
--- a/src/library/scala/Product15.scala
+++ b/src/library/scala/Product15.scala
@@ -24,7 +24,7 @@ trait Product15[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 15
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product16.scala b/src/library/scala/Product16.scala
index f03b0b34a2..84dccb0ac8 100644
--- a/src/library/scala/Product16.scala
+++ b/src/library/scala/Product16.scala
@@ -24,7 +24,7 @@ trait Product16[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 16
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product17.scala b/src/library/scala/Product17.scala
index 72df1b496a..0d50898bf4 100644
--- a/src/library/scala/Product17.scala
+++ b/src/library/scala/Product17.scala
@@ -24,7 +24,7 @@ trait Product17[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 17
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product18.scala b/src/library/scala/Product18.scala
index 0402f90a01..9b32265d71 100644
--- a/src/library/scala/Product18.scala
+++ b/src/library/scala/Product18.scala
@@ -24,7 +24,7 @@ trait Product18[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 18
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product19.scala b/src/library/scala/Product19.scala
index b9770db47b..fe6b95669b 100644
--- a/src/library/scala/Product19.scala
+++ b/src/library/scala/Product19.scala
@@ -24,7 +24,7 @@ trait Product19[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 19
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product2.scala b/src/library/scala/Product2.scala
index a43a4a285c..091bcc89de 100644
--- a/src/library/scala/Product2.scala
+++ b/src/library/scala/Product2.scala
@@ -24,7 +24,7 @@ trait Product2[@specialized(Int, Long, Double) +T1, @specialized(Int, Long, Doub
   override def productArity = 2
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product20.scala b/src/library/scala/Product20.scala
index 7b0df201ec..81315e3558 100644
--- a/src/library/scala/Product20.scala
+++ b/src/library/scala/Product20.scala
@@ -24,7 +24,7 @@ trait Product20[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 20
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product21.scala b/src/library/scala/Product21.scala
index f81347aac0..b5967c06e1 100644
--- a/src/library/scala/Product21.scala
+++ b/src/library/scala/Product21.scala
@@ -24,7 +24,7 @@ trait Product21[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 21
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product22.scala b/src/library/scala/Product22.scala
index 7a25891c6e..c7b9da5ce8 100644
--- a/src/library/scala/Product22.scala
+++ b/src/library/scala/Product22.scala
@@ -24,7 +24,7 @@ trait Product22[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
   override def productArity = 22
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product3.scala b/src/library/scala/Product3.scala
index 9976240935..7154bf5bdf 100644
--- a/src/library/scala/Product3.scala
+++ b/src/library/scala/Product3.scala
@@ -24,7 +24,7 @@ trait Product3[+T1, +T2, +T3] extends Any with Product {
   override def productArity = 3
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product4.scala b/src/library/scala/Product4.scala
index d6c1543390..046f8c7a7c 100644
--- a/src/library/scala/Product4.scala
+++ b/src/library/scala/Product4.scala
@@ -24,7 +24,7 @@ trait Product4[+T1, +T2, +T3, +T4] extends Any with Product {
   override def productArity = 4
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product5.scala b/src/library/scala/Product5.scala
index 5f1b11a30d..3e952c8c55 100644
--- a/src/library/scala/Product5.scala
+++ b/src/library/scala/Product5.scala
@@ -24,7 +24,7 @@ trait Product5[+T1, +T2, +T3, +T4, +T5] extends Any with Product {
   override def productArity = 5
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product6.scala b/src/library/scala/Product6.scala
index efd9408d73..010c68711a 100644
--- a/src/library/scala/Product6.scala
+++ b/src/library/scala/Product6.scala
@@ -24,7 +24,7 @@ trait Product6[+T1, +T2, +T3, +T4, +T5, +T6] extends Any with Product {
   override def productArity = 6
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product7.scala b/src/library/scala/Product7.scala
index fab0a997a1..24e5a5c05a 100644
--- a/src/library/scala/Product7.scala
+++ b/src/library/scala/Product7.scala
@@ -24,7 +24,7 @@ trait Product7[+T1, +T2, +T3, +T4, +T5, +T6, +T7] extends Any with Product {
   override def productArity = 7
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product8.scala b/src/library/scala/Product8.scala
index 41391f7050..4a9f65b00e 100644
--- a/src/library/scala/Product8.scala
+++ b/src/library/scala/Product8.scala
@@ -24,7 +24,7 @@ trait Product8[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8] extends Any with Product
   override def productArity = 8
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/Product9.scala b/src/library/scala/Product9.scala
index e22538e1ee..9af11f709a 100644
--- a/src/library/scala/Product9.scala
+++ b/src/library/scala/Product9.scala
@@ -24,7 +24,7 @@ trait Product9[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9] extends Any with Pro
   override def productArity = 9
 
   
-  /** Returns the n-th projection of this product if 0 < n <= productArity,
+  /** Returns the n-th projection of this product if 0 <= n < productArity,
    *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
diff --git a/src/library/scala/collection/GenTraversableOnce.scala b/src/library/scala/collection/GenTraversableOnce.scala
index 244ff26397..4af2ca23be 100644
--- a/src/library/scala/collection/GenTraversableOnce.scala
+++ b/src/library/scala/collection/GenTraversableOnce.scala
@@ -67,6 +67,23 @@ trait GenTraversableOnce[+A] extends Any {
     */
   def foreach[U](f: A => U): Unit
 
+  /** Tests whether this $coll is known to have a finite size.
+    *  All strict collections are known to have finite size. For a non-strict
+    *  collection such as `Stream`, the predicate returns `'''true'''` if all
+    *  elements have been computed. It returns `'''false'''` if the stream is
+    *  not yet evaluated to the end. Non-empty Iterators usually return
+    *  `'''false'''` even if they were created from a collection with a known
+    *  finite size.
+    *
+    *  Note: many collection methods will not work on collections of infinite sizes.
+    *  The typical failure mode is an infinite loop. These methods always attempt a
+    *  traversal without checking first that `hasDefiniteSize` returns `'''true'''`.
+    *  However, checking `hasDefiniteSize` can provide an assurance that size is
+    *  well-defined and non-termination is not a concern.
+    *
+    *  @return  `'''true'''` if this collection is known to have finite size,
+    *           `'''false'''` otherwise.
+    */
   def hasDefiniteSize: Boolean
 
   def seq: TraversableOnce[A]
@@ -81,6 +98,9 @@ trait GenTraversableOnce[+A] extends Any {
 
   /** Tests whether the $coll is empty.
    *
+   *  Note: Implementations in subclasses that are not repeatedly traversable must take
+   *  care not to consume any elements when `isEmpty` is called.
+   *
    *  @return    `true` if the $coll contains no elements, `false` otherwise.
    */
   def isEmpty: Boolean
diff --git a/src/library/scala/collection/TraversableLike.scala b/src/library/scala/collection/TraversableLike.scala
index fa9a3a7482..d914f2e0ff 100644
--- a/src/library/scala/collection/TraversableLike.scala
+++ b/src/library/scala/collection/TraversableLike.scala
@@ -138,17 +138,6 @@ trait TraversableLike[+A, +Repr] extends Any
     result
   }
 
-  /** Tests whether this $coll is known to have a finite size.
-   *  All strict collections are known to have finite size. For a non-strict
-   *  collection such as `Stream`, the predicate returns `'''true'''` if all
-   *  elements have been computed. It returns `'''false'''` if the stream is
-   *  not yet evaluated to the end.
-   *
-   *  Note: many collection methods will not work on collections of infinite sizes.
-   *
-   *  @return  `'''true'''` if this collection is known to have finite size,
-   *           `'''false'''` otherwise.
-   */
   def hasDefiniteSize = true
 
   def ++[B >: A, That](that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That = {
diff --git a/src/library/scala/collection/TraversableOnce.scala b/src/library/scala/collection/TraversableOnce.scala
index 41362e8dd7..b87fcd166e 100644
--- a/src/library/scala/collection/TraversableOnce.scala
+++ b/src/library/scala/collection/TraversableOnce.scala
@@ -38,9 +38,10 @@ import scala.reflect.ClassTag
  *  `Traversables`, such as folds, conversions, and other operations which
  *  traverse some or all of the elements and return a derived value.
  *  Directly subclassing `TraversableOnce` is not recommended - instead,
- *  consider declaring an `Iterator` with a `next` and `hasNext` method,
- *  creating an `Iterator` with one of the methods on the `Iterator` object,
- *  or declaring a subclass of `Traversable`.
+ *  consider declaring an `Iterator` with a `next` and `hasNext` method or
+ *  creating an `Iterator` with one of the methods on the `Iterator` object.
+ *  Consider declaring a subclass of `Traversable` instead if the elements
+ *  can be traversed repeatedly.
  *
  *  @define coll traversable or iterator
  *  @define orderDependent
@@ -61,8 +62,8 @@ import scala.reflect.ClassTag
 trait TraversableOnce[+A] extends Any with GenTraversableOnce[A] {
   self =>
 
+  //TODO 2.12: Remove these methods. They are already defined in GenTraversableOnce
   /* Self-documenting abstract methods. */
-
   def foreach[U](f: A => U): Unit
   def isEmpty: Boolean
   def hasDefiniteSize: Boolean
diff --git a/src/library/scala/util/MurmurHash.scala b/src/library/scala/util/MurmurHash.scala
index e05fe0875b..1b6db5d6aa 100644
--- a/src/library/scala/util/MurmurHash.scala
+++ b/src/library/scala/util/MurmurHash.scala
@@ -10,7 +10,7 @@ package scala
 package util
 
 /** An implementation of Austin Appleby's MurmurHash 3.0 algorithm
- *  (32 bit version); reference: http://code.google.com/p/smhasher
+ *  (32 bit version); reference: https://github.com/aappleby/smhasher
  *
  *  This is the hash used by collections and case classes (including
  *  tuples).
diff --git a/src/library/scala/util/hashing/MurmurHash3.scala b/src/library/scala/util/hashing/MurmurHash3.scala
index 4e5537954f..6a56910451 100644
--- a/src/library/scala/util/hashing/MurmurHash3.scala
+++ b/src/library/scala/util/hashing/MurmurHash3.scala
@@ -193,7 +193,7 @@ private[hashing] class MurmurHash3 {
  * to remedy some weaknesses and improve performance. This represents the
  * latest and supposedly final version of the algorithm (revision 136).
  *
- * @see [[http://code.google.com/p/smhasher]]
+ * @see [[https://github.com/aappleby/smhasher]]
  */
 object MurmurHash3 extends MurmurHash3 {
   final val arraySeed       = 0x3c074a61