fix: code

Author: alexander-akait

lib/Server.js

@@ -1775,17 +1775,25 @@ class Server {
   }
 
   async stop() {
+    if (this.webSocketProxies.length > 0) {
+      this.webSocketProxies = [];
+    }
+
+    if (this.staticWatchers.length > 0) {
+      await Promise.all(this.staticWatchers.map((watcher) => watcher.close()));
+
+      this.staticWatchers = [];
+    }
+
     if (this.webSocketServer) {
       await new Promise((resolve) => {
         this.webSocketServer.implementation.close(() => {
           resolve();
         });
       });
-    }
-
-    await Promise.all(this.staticWatchers.map((watcher) => watcher.close()));
 
-    this.staticWatchers = [];
+      this.webSocketServer = null;
+    }
 
     if (this.server) {
       await new Promise((resolve) => {
@@ -1794,17 +1802,23 @@ class Server {
         });
       });
 
-      await new Promise((resolve, reject) => {
-        this.middleware.close((error) => {
-          if (error) {
-            reject(error);
+      this.server = null;
 
-            return;
-          }
+      if (this.middleware) {
+        await new Promise((resolve, reject) => {
+          this.middleware.close((error) => {
+            if (error) {
+              reject(error);
 
-          resolve();
+              return;
+            }
+
+            resolve();
+          });
         });
-      });
+
+        this.middleware = null;
+      }
     }
   }