Do not broadcast messages to disconnected clients

This method is used when players have disconnected. If multiple players
disconnect at once, this method leads to exceptions.

diff --git a/src/Impostor.Server/Net/State/Game.cs b/src/Impostor.Server/Net/State/Game.cs
index 3896b6aa8d2dbdb5754ddc8b1c10c9940f68b11a..6d7e4084a3e27a2d4145a3772de8b720f1f9e8b8 100644 (file)
--- a/src/Impostor.Server/Net/State/Game.cs
+++ b/src/Impostor.Server/Net/State/Game.cs
@@ -123,7 +123,8 @@ namespace Impostor.Server.Net.State
         {
             return Players
                 .Where(filter)
-                .Select(p => p.Client.Connection)!;
+                .Select(p => p.Client.Connection)
+                .Where(c => c != null && c.IsConnected)!;
         }
     }
 }