From b5ebd14589a5473b04023d67e0b1b5e5d131cd79 Mon Sep 17 00:00:00 2001
From: "nicolas.dorier" <nicolas.dorier@gmail.com>
Date: Tue, 12 Oct 2021 17:39:48 +0900
Subject: [PATCH] Fix NRE in BaseService.StopAsync

---
 BTCPayServer/HostedServices/BaseAsyncService.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/BTCPayServer/HostedServices/BaseAsyncService.cs b/BTCPayServer/HostedServices/BaseAsyncService.cs
index 4512d1c5f..0c501aac6 100644
--- a/BTCPayServer/HostedServices/BaseAsyncService.cs
+++ b/BTCPayServer/HostedServices/BaseAsyncService.cs
@@ -57,7 +57,8 @@ namespace BTCPayServer.HostedServices
             if (_Cts != null)
             {
                 _Cts.Cancel();
-                await Task.WhenAll(_Tasks);
+                if (_Tasks != null)
+                    await Task.WhenAll(_Tasks);
             }
             Logs.PayServer.LogInformation($"{this.GetType().Name} successfully exited...");
         }