fix(WebSocketShard): add websocket send error handling (#2981)

* websocket send error handling

* fix: emit only when error is present

* refactor: use an if instead

src/client/websocket/WebSocketShard.js

@@ -437,7 +437,9 @@ class WebSocketShard extends EventEmitter {
       this.debug(`Tried to send packet ${data} but no WebSocket is available!`);
       return;
     }
-    this.ws.send(WebSocket.pack(data));
+    this.ws.send(WebSocket.pack(data), err => {
+      if (err) this.manager.client.emit(Events.ERROR, err);
+    });
   }
 
   /**

test/tester1000.js

@@ -13,6 +13,7 @@ client.on('ready', () => {
   log('READY', client.user.tag, client.user.id);
 });
 client.on('rateLimit', log);
+client.on('error', console.error);
 
 const commands = {
   eval: message => {