From 674007d892110d813664554ae8875f21245dbd7e Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@matrix.org>
Date: Sun, 2 Jun 2019 15:15:14 +0200
Subject: [PATCH] don't fail when insert first or appending a tile

---
 src/domain/session/room/timeline/TilesCollection.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/domain/session/room/timeline/TilesCollection.js b/src/domain/session/room/timeline/TilesCollection.js
index 0b1dab8e..4726fdde 100644
--- a/src/domain/session/room/timeline/TilesCollection.js
+++ b/src/domain/session/room/timeline/TilesCollection.js
@@ -88,8 +88,8 @@ export default class TilesCollection extends BaseObservableList {
 
         const newTile = this._tileCreator(entry);
         if (newTile) {
-            prevTile.updateNextSibling(newTile);
-            nextTile.updatePreviousSibling(newTile);
+            prevTile  && prevTile.updateNextSibling(newTile);
+            nextTile  && nextTile.updatePreviousSibling(newTile);
             this._tiles.splice(tileIdx, 0, newTile);
             this.emitAdd(tileIdx, newTile);
         }