From 454fe8cdf7fff20d22790413747bbad7c6fa1952 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Thu, 1 Oct 2020 17:52:02 +0300
Subject: [PATCH] Fix crash in calls box.

---
 Telegram/SourceFiles/calls/calls_box_controller.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/calls/calls_box_controller.cpp b/Telegram/SourceFiles/calls/calls_box_controller.cpp
index 4d5f4400d7..1e03fa1531 100644
--- a/Telegram/SourceFiles/calls/calls_box_controller.cpp
+++ b/Telegram/SourceFiles/calls/calls_box_controller.cpp
@@ -274,7 +274,8 @@ void BoxController::prepare() {
 	session().changes().messageUpdates(
 		Data::MessageUpdate::Flag::NewAdded
 	) | rpl::filter([=](const Data::MessageUpdate &update) {
-		return (update.item->media()->call() != nullptr);
+		const auto media = update.item->media();
+		return (media != nullptr) && (media->call() != nullptr);
 	}) | rpl::start_with_next([=](const Data::MessageUpdate &update) {
 		insertRow(update.item, InsertWay::Prepend);
 	}, lifetime());