Prevent data race while querying nodes

x/node/client/cmd/query.go

@@ -199,21 +199,25 @@ func QueryNodes() *cobra.Command {
 			}
 
 			var (
-				wg    = sync.WaitGroup{}
+				group = sync.WaitGroup{}
+				mutex = sync.Mutex{}
 				table = tablewriter.NewWriter(cmd.OutOrStdout())
 			)
 
 			table.SetHeader(header)
 			for i := 0; i < len(items); i++ {
-				wg.Add(1)
+				group.Add(1)
 				go func(i int) {
-					defer wg.Done()
+					defer group.Done()
 
 					var (
 						info, _ = fetchNodeInfo(items[i].RemoteURL)
 						item    = types.NewNodeFromRaw(&items[i]).WithInfo(info)
 					)
 
+					mutex.Lock()
+					defer mutex.Unlock()
+
 					table.Append(
 						[]string{
 							item.Moniker,
@@ -231,7 +235,7 @@ func QueryNodes() *cobra.Command {
 				}(i)
 			}
 
-			wg.Wait()
+			group.Wait()
 
 			table.Render()
 			return nil