Fixes #3350. review by extempore

1 files changed, 10 insertions, 0 deletions

diff --git a/src/library/scala/collection/immutable/Stream.scala b/src/library/scala/collection/immutable/Stream.scala
index 50fa07c2cf..fbda0b918b 100644
--- a/src/library/scala/collection/immutable/Stream.scala
+++ b/src/library/scala/collection/immutable/Stream.scala
@@ -104,6 +104,16 @@ self =>
     loop(this, "")
   }
 
+  override def length: Int = {
+    var len = 0
+    var left = this
+    while (!left.isEmpty) {
+      len += 1
+      left = left.tail
+    }
+    len
+  }
+
   /** It's an imperfect world, but at least we can bottle up the
    *  imperfection in a capsule.
    */