From 24a6b69ed8e79a3890d4a29d713bc9cb73e9c0d9 Mon Sep 17 00:00:00 2001
From: nielsandriesse <andriesseniels@gmail.com>
Date: Thu, 30 Jul 2020 12:19:42 +1000
Subject: [PATCH] Fix UI code invoked from background thread

---
 Signal/src/util/MainAppContext.m | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Signal/src/util/MainAppContext.m b/Signal/src/util/MainAppContext.m
index 9790ae493..e367efa31 100644
--- a/Signal/src/util/MainAppContext.m
+++ b/Signal/src/util/MainAppContext.m
@@ -157,6 +157,7 @@ NSString *const ReportedApplicationStateDidChangeNotification = @"ReportedApplic
 
 - (BOOL)isMainAppAndActive
 {
+    if (![NSThread isMainThread]) { return NO; }
     return [UIApplication sharedApplication].applicationState == UIApplicationStateActive;
 }