Fix: dungeon migrating

Maple2.Server.Core/Network/Session.cs

@@ -211,6 +211,11 @@ private async Task ReadRecvPipe(PipeReader reader) {
                 reader.AdvanceTo(buffer.Start, buffer.End);
             } while (!disposed && !result.IsCompleted);
         } catch (Exception ex) {
+            if (ex is InvalidOperationException invalidOperation && invalidOperation.Message.Contains("reader was completed")) {
+                // Ignore this exception, it happens when the reader is completed, either by the client closing or by the session being disposed.
+                // it's not a real error
+                return;
+            }
             if (!disposed) {
                 Logger.Error(ex, "Exception reading recv packet");
             }

Maple2.Server.Game/PacketHandlers/DungeonRoomHandler.cs

@@ -1,12 +1,13 @@
 using Maple2.Database.Storage;
 using Maple2.PacketLib.Tools;
 using Maple2.Server.Core.Constants;
+using Maple2.Server.Core.PacketHandlers;
 using Maple2.Server.Game.PacketHandlers.Field;
 using Maple2.Server.Game.Session;
 
 namespace Maple2.Server.Game.PacketHandlers;
 
-public class DungeonRoomHandler : FieldPacketHandler {
+public class DungeonRoomHandler : PacketHandler<GameSession> {
     public override RecvOp OpCode => RecvOp.RoomDungeon;
 
     private enum Command : byte {