Fix race condition between GApplication and GNotification

Telegram/SourceFiles/platform/linux/notifications_manager_linux.cpp

@@ -821,6 +821,8 @@ bool ByDefault() {
 }
 
 void Create(Window::Notifications::System *system) {
+	static auto ServiceWatcher = CreateServiceWatcher();
+
 	const auto managerSetter = [=] {
 		using ManagerType = Window::Notifications::ManagerType;
 		if ((Core::App().settings().nativeNotifications() || Enforced())
@@ -839,21 +841,34 @@ void Create(Window::Notifications::System *system) {
 	};
 
 	if (Gio::Application::get_default()) {
+		ServiceWatcher = nullptr;
+		ServiceRegistered = false;
+		CurrentServerInformation = std::nullopt;
+		CurrentCapabilities = QStringList{};
 		managerSetter();
 		return;
 	}
 
-	static const auto ServiceWatcher = CreateServiceWatcher();
-
 	const auto counter = std::make_shared<int>(2);
 	const auto oneReady = [=] {
 		if (!--*counter) {
+			// GApplication may be created while the reply is received
+			if (Gio::Application::get_default()) {
+				Core::App().notifications().createManager();
+				return;
+			}
 			managerSetter();
 		}
 	};
 
 	// snap doesn't allow access when the daemon is not running :(
 	StartServiceAsync([=] {
+		// GApplication may be created while the reply is received
+		if (Gio::Application::get_default()) {
+			Core::App().notifications().createManager();
+			return;
+		}
+
 		ServiceRegistered = GetServiceRegistered();
 
 		if (!ServiceRegistered) {

Telegram/SourceFiles/platform/linux/specific_linux.cpp

@@ -291,6 +291,11 @@ void LaunchGApplication() {
 						nullptr)));
 
 			app->signal_startup().connect([=] {
+				// GNotification
+				InvokeQueued(qApp, [] {
+					Core::App().notifications().createManager();
+				});
+
 				QEventLoop loop;
 				loop.exec(QEventLoop::ApplicationExec);
 				app->quit();