From 025ef2c3018959a4044da5feddd19a98bf4291ee Mon Sep 17 00:00:00 2001
From: ryanzhao <ryanzhaors@qq.com>
Date: Mon, 9 Aug 2021 11:20:57 +1000
Subject: [PATCH] clean

---
 Session/Conversations/ConversationViewModel.m | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Session/Conversations/ConversationViewModel.m b/Session/Conversations/ConversationViewModel.m
index 1e5293b73..efcd2cee8 100644
--- a/Session/Conversations/ConversationViewModel.m
+++ b/Session/Conversations/ConversationViewModel.m
@@ -835,8 +835,8 @@ NS_ASSUME_NONNULL_BEGIN
         // to show the date header of the deleted message if needed
         for (NSString *deletedItemId in deletedItemIdSet) {
             NSUInteger oldIndex = [oldItemIdList indexOfObject:deletedItemId];
-            id<ConversationViewItem> _Nullable nextItemId = (oldIndex + 1 < oldItemIdList.count ? oldItemIdList[oldIndex + 1] : nil);
-            if (nextItemId != nil) {
+            if (oldIndex != NSNotFound && oldIndex + 1 < oldItemIdList.count) {
+                NSString *nextItemId = oldItemIdList[oldIndex + 1];
                 [updatedItemSet addObject:nextItemId];
                 [updatedNeighborItemSet addObject:nextItemId];
             }