From 9120222c264db141b3613b2aa8470ff0ea0aea1c Mon Sep 17 00:00:00 2001
From: ComputerMaster1st <mr_m.a_thompson@hotmail.co.uk>
Date: Wed, 28 Nov 2018 00:16:51 +0000
Subject: [PATCH] Solves "Disconnecting" Lockup

---
 src/Discord.Net.WebSocket/DiscordSocketClient.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Discord.Net.WebSocket/DiscordSocketClient.cs b/src/Discord.Net.WebSocket/DiscordSocketClient.cs
index 3d260d1a6..14423c1f0 100644
--- a/src/Discord.Net.WebSocket/DiscordSocketClient.cs
+++ b/src/Discord.Net.WebSocket/DiscordSocketClient.cs
@@ -251,7 +251,8 @@ namespace Discord.WebSocket
                 await heartbeatTask.ConfigureAwait(false);
             _heartbeatTask = null;
 
-            while (_heartbeatTimes.TryDequeue(out _)) { }
+            // Check if hearbeatTimes is not empty before dequeuing. TryDequeue can cause blocking.
+            if (!_heartbeatTimes.IsEmpty) while (_heartbeatTimes.TryDequeue(out long time)) { }
             _lastMessageTime = 0;
 
             await _gatewayLogger.DebugAsync("Waiting for guild downloader").ConfigureAwait(false);