Share the empty LinkedList between first0/last0.

This is in line with the existing implementation
of `MutableList#clear`, and in line with an newly
created empty collection.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library/scala/collection/mutable/Queue.scala b/src/library/scala/collection/mutable/Queue.scala
index 8956a1105e..b947fa3cca 100644
--- a/src/library/scala/collection/mutable/Queue.scala
+++ b/src/library/scala/collection/mutable/Queue.scala
@@ -183,7 +183,7 @@ extends MutableList[A]
 
   private[this] def decrementLength() {
     len -= 1
-    if (len == 0) last0 = new LinkedList[A]()
+    if (len == 0) last0 = first0
   }
 }