Fix debug adapter reconnection after disconnect

src/OneScript.DebugServices/ReconnectableDebugController.cs

@@ -39,7 +39,6 @@ public class ReconnectableDebugController : IDebugController
         public ReconnectableDebugController(int port)
         {
             _port = port;
-            _listener = TcpListener.Create(_port);
         }
 
         public IBreakpointManager BreakpointManager => _breakpointManager;
@@ -64,6 +63,7 @@ public void Init()
 
         private void CreateSession()
         {
+            _listener = TcpListener.Create(_port);
             _channel = new DelayedConnectionChannel(_listener);
             _server = new DefaultMessageServer<RpcCall>(_channel)
             {
@@ -125,13 +125,26 @@ private void DisposeSession()
             _channel?.Dispose();
             _callbackService?.Dispose();
 
+            if (_listener != null)
+            {
+                try
+                {
+                    _listener.Stop();
+                }
+                catch
+                {
+                    // Listener may already be stopped
+                }
+            }
+
             _channel = null;
             _callbackService = null;
             _server = null;
             _dispatcher = null;
             _debugger = null;
             _threadManager = null;
             _breakpointManager = null;
+            _listener = null;
         }
 
         private void ThreadManagerOnThreadStopped(object sender, ThreadStoppedEventArgs e)
@@ -190,9 +203,6 @@ public void Dispose()
 
                 DisposeSession();
 
-                _listener?.Stop();
-                _listener = null;
-
                 _disposed = true;
             }
         }

src/VSCode.DebugAdapter/DebugeeProcess.cs

@@ -207,6 +207,7 @@ public void HandleDisconnect(bool terminate)
                 return;
             }
             _debugger.Disconnect(terminate);
+            _debugger = null;
 
             var mustKill = terminate && !_attachMode;