From 9ef9751f5f43568c0fc9e81b90e4b751cd350018 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Tue, 28 Jun 2022 16:43:51 +0300
Subject: [PATCH] Immediately exit UpdatesManager::process_updates if there are
 no updates to process.

---
 td/telegram/UpdatesManager.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/td/telegram/UpdatesManager.cpp b/td/telegram/UpdatesManager.cpp
index 4e6b88b51..8958739c1 100644
--- a/td/telegram/UpdatesManager.cpp
+++ b/td/telegram/UpdatesManager.cpp
@@ -2027,14 +2027,15 @@ void UpdatesManager::add_pending_qts_update(tl_object_ptr<telegram_api::Update>
 
 void UpdatesManager::process_updates(vector<tl_object_ptr<telegram_api::Update>> &&updates, bool force_apply,
                                      Promise<Unit> &&promise) {
-  tl_object_ptr<telegram_api::updatePtsChanged> update_pts_changed;
-
   int32 update_count = 0;
   for (auto &update : updates) {
     if (update != nullptr) {
       update_count++;
     }
   }
+  if (update_count == 0) {
+    return promise.set_value(Unit());
+  }
 
   MultiPromiseActorSafe mpas{"OnProcessUpdatesMultiPromiseActor"};
   Promise<Unit> lock;
@@ -2070,6 +2071,8 @@ void UpdatesManager::process_updates(vector<tl_object_ptr<telegram_api::Update>>
       }
     }
   */
+
+  tl_object_ptr<telegram_api::updatePtsChanged> update_pts_changed;
   for (auto &update : updates) {
     if (update != nullptr) {
       // process updateNewChannelMessage first