From 4049d4aa7cd3406ff137af6931b05faa2ddfe3cc Mon Sep 17 00:00:00 2001
From: Slava Monich <slava@monich.com>
Date: Sun, 1 Nov 2020 04:57:37 +0200
Subject: [PATCH] Fixed crash in ChatModel

QList::first() panics if the list is empty.
---
 src/chatmodel.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/chatmodel.cpp b/src/chatmodel.cpp
index 7525c8e..6e42e21 100644
--- a/src/chatmodel.cpp
+++ b/src/chatmodel.cpp
@@ -83,7 +83,7 @@ void ChatModel::initialize(const QVariantMap &chatInformation)
 
 void ChatModel::triggerLoadMoreHistory()
 {
-    if (!this->inIncrementalUpdate) {
+    if (!this->inIncrementalUpdate && !messages.isEmpty()) {
         qDebug() << "[ChatModel] Trigger loading older history...";
         this->inIncrementalUpdate = true;
         this->tdLibWrapper->getChatHistory(this->chatId, this->messages.first().toMap().value("id").toLongLong());