From 8b032a40e4a9619c3fefe5031fd9c7d6614547c6 Mon Sep 17 00:00:00 2001
From: Ryan ZHAO <ryanzhaors@qq.com>
Date: Wed, 19 Aug 2020 14:17:55 +1000
Subject: [PATCH] probably fix a crash since the sort id might not be
 initialized

---
 SignalMessaging/utils/ThreadUtil.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/SignalMessaging/utils/ThreadUtil.m b/SignalMessaging/utils/ThreadUtil.m
index 22e717d35..b561dba73 100644
--- a/SignalMessaging/utils/ThreadUtil.m
+++ b/SignalMessaging/utils/ThreadUtil.m
@@ -456,7 +456,7 @@ typedef void (^BuildOutgoingMessageCompletionBlock)(TSOutgoingMessage *savedMess
         } else {
             TSInteraction *_Nullable firstUnseenInteraction =
                 [[TSDatabaseView unseenDatabaseViewExtension:transaction] firstObjectInGroup:thread.uniqueId];
-            if (firstUnseenInteraction) {
+            if (firstUnseenInteraction && firstUnseenInteraction.sortId != NULL) {
                 firstUnseenSortId = @(firstUnseenInteraction.sortId);
             }
         }