From fe11837a61b0dae268c98cb4ce7bb21c6f10b1e6 Mon Sep 17 00:00:00 2001
From: Daniel Imms <daimms@microsoft.com>
Date: Fri, 19 May 2017 19:11:28 -0700
Subject: [PATCH] Create new entries when shifting

---
 src/utils/CircularList.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/utils/CircularList.ts b/src/utils/CircularList.ts
index 1a698ff0..bc693260 100644
--- a/src/utils/CircularList.ts
+++ b/src/utils/CircularList.ts
@@ -197,7 +197,10 @@ export class CircularList<T> extends EventEmitter {
 
     if (offset > 0) {
       for (let i = count - 1; i >= 0; i--) {
-        this._setEntry(start + i + offset, this.getEntry(start + i));
+        this._setEntry(start + i + offset, {
+          id: this._nextId++,
+          value: this.get(start + i)
+        });
       }
       const expandListBy = (start + count + offset) - this._length;
       if (expandListBy > 0) {