From 47c67479b3f8d84e1be0a7977c3cc4106e52cf1a Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Tue, 18 Dec 2018 10:43:28 +0300
Subject: [PATCH] Fix race in on_alarm_timeout.

GitOrigin-RevId: 0a940296688cf4b743c85fa4513504483cd357df
---
 td/telegram/Td.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index f12deed1..d1f220cd 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -3062,9 +3062,13 @@ void Td::on_alarm_timeout(int64 alarm_id) {
     }
     return;
   }
+  if (close_flag_ >= 2) {
+    // pending_alarms_ was already cleared
+    return;
+  }
 
   auto it = pending_alarms_.find(alarm_id);
-  CHECK(it != pending_alarms_.end()) << alarm_id << ' ' << close_flag_ << ' ' << G()->close_flag();
+  CHECK(it != pending_alarms_.end());
   uint64 request_id = it->second;
   pending_alarms_.erase(alarm_id);
   send_result(request_id, make_tl_object<td_api::ok>());