From fe97939abf0dc77ec4d0e66bf746bbc2a2a273bd Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 17 Aug 2020 10:43:51 +0400
Subject: [PATCH] Fix possible crash in call error handling.

---
 Telegram/SourceFiles/calls/calls_call.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/calls/calls_call.cpp b/Telegram/SourceFiles/calls/calls_call.cpp
index ec89859fc7..c2d2a96045 100644
--- a/Telegram/SourceFiles/calls/calls_call.cpp
+++ b/Telegram/SourceFiles/calls/calls_call.cpp
@@ -409,7 +409,9 @@ void Call::redial() {
 }
 
 QString Call::getDebugLog() const {
-	return QString::fromStdString(_instance->getDebugInfo());
+	return _instance
+		? QString::fromStdString(_instance->getDebugInfo())
+		: QString();
 }
 
 void Call::startWaitingTrack() {
@@ -833,7 +835,9 @@ void Call::handleControllerStateChange(tgcalls::State state) {
 	} break;
 
 	case tgcalls::State::Failed: {
-		auto error = QString::fromStdString(_instance->getLastError());
+		auto error = _instance
+			? QString::fromStdString(_instance->getLastError())
+			: QString();
 		LOG(("Call Info: State changed to Failed, error: %1.").arg(error));
 		handleControllerError(error);
 	} break;