1 files changed, 8 insertions, 5 deletions
diff --git a/src/library/scala/collection/mutable/WrappedArrayBuilder.scala b/src/library/scala/collection/mutable/WrappedArrayBuilder.scala
index bfe95a11ab..c4781321d7 100644
--- a/src/library/scala/collection/mutable/WrappedArrayBuilder.scala
+++ b/src/library/scala/collection/mutable/WrappedArrayBuilder.scala
@@ -17,12 +17,14 @@ import scala.runtime.ScalaRunTime._
 
 /** A builder class for arrays.
  *
+ *  This builder can be reused.
+ *
  *  @tparam A   type of elements that can be added to this builder.
  *  @param tag  class tag for objects of type `A`.
  *
  *  @since 2.8
  */
-class WrappedArrayBuilder[A](tag: ClassTag[A]) extends Builder[A, WrappedArray[A]] {
+class WrappedArrayBuilder[A](tag: ClassTag[A]) extends ReusableBuilder[A, WrappedArray[A]] {
 
   @deprecated("use tag instead", "2.10.0")
   val manifest: ClassTag[A] = tag
@@ -73,12 +75,13 @@ class WrappedArrayBuilder[A](tag: ClassTag[A]) extends Builder[A, WrappedArray[A
     this
   }
 
-  def clear() {
-    size = 0
-  }
+  def clear() { size = 0 }
 
   def result() = {
-    if (capacity != 0 && capacity == size) elems
+    if (capacity != 0 && capacity == size) {
+      capacity = 0
+      elems
+    }
     else mkArray(size)
   }