From 049b8581254a5eb89db6572721de161ed20b1aa5 Mon Sep 17 00:00:00 2001
From: Michael Kirk <michael@signal.org>
Date: Sat, 22 Dec 2018 11:43:33 -0700
Subject: [PATCH] Fix crash when update corresponds to a move.

reloading during performBatchUpdates requires the *original* indexPath, not the
new index path.
---
 .../ConversationView/ConversationViewController.m               | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
index ee52ec121..f00b94a97 100644
--- a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
+++ b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
@@ -4463,7 +4463,7 @@ typedef enum : NSUInteger {
                 }
                 case ConversationUpdateItemType_Update: {
                     [self.collectionView reloadItemsAtIndexPaths:@[
-                        [NSIndexPath indexPathForRow:(NSInteger)updateItem.newIndex inSection:section]
+                        [NSIndexPath indexPathForRow:(NSInteger)updateItem.oldIndex inSection:section]
                     ]];
                     hasUpdated = YES;
                     break;