Fixes SI-4461.

No review.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/library/scala/collection/mutable/ObservableBuffer.scala b/src/library/scala/collection/mutable/ObservableBuffer.scala
index a619edf281..6b5079e402 100644
--- a/src/library/scala/collection/mutable/ObservableBuffer.scala
+++ b/src/library/scala/collection/mutable/ObservableBuffer.scala
@@ -70,4 +70,18 @@ trait ObservableBuffer[A] extends Buffer[A] with Publisher[Message[A] with Undoa
       def undo() { throw new UnsupportedOperationException("cannot undo") }
     })
   }
+  
+  abstract override def insertAll(n: Int, elems: collection.Traversable[A]) {
+    super.insertAll(n, elems)
+    var curr = n - 1
+    val msg = elems.foldLeft(new Script[A]() with Undoable {
+      def undo() { throw new UnsupportedOperationException("cannot undo") }
+    }) {
+      case (msg, elem) =>
+        curr += 1
+        msg += Include(Index(curr), elem)
+    }
+    publish(msg)
+  }
+  
 }