From f30ddbf175204149c9538f6d8638876c6dbd2804 Mon Sep 17 00:00:00 2001
From: "nicolas.dorier" <nicolas.dorier@gmail.com>
Date: Mon, 4 Jul 2022 13:17:36 +0900
Subject: [PATCH] Fix spurious crash at shutdown

---
 BTCPayServer.Common/MultiProcessingQueue.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/BTCPayServer.Common/MultiProcessingQueue.cs b/BTCPayServer.Common/MultiProcessingQueue.cs
index 9d3565d6f..6f2e0ab7e 100644
--- a/BTCPayServer.Common/MultiProcessingQueue.cs
+++ b/BTCPayServer.Common/MultiProcessingQueue.cs
@@ -106,9 +106,11 @@ namespace BTCPayServer
                 {
                 }
             }
-            cancellationToken.ThrowIfCancellationRequested();
             lock (_Queues)
             {
+                if (_Queues.Count is 0)
+                    return;
+                cancellationToken.ThrowIfCancellationRequested();
                 Cleanup();
             }
         }