go 使用errgroup 捕获goroutine 运行中产生的错误

func CreateGreeter() error {
   var mu sync.Mutex
group := new(errgroup.Group)

   var info []biz.Info
   m := make(map[string]string)

   userlist := []string{"User0001", "User0002", "User0003", "User0004", "User0005"}
   for _, s := range userlist {
      tempNum := s
      go func() {}()
      eg.Go(
         func() error {
            err := r.data.db.Table("111").Where("User=?", tempNum).Find(&info).Error
            if err != nil {
               fmt.Println("查询失败")
               return err
            }

            news := m
            for _, b := range info {
               mu.Lock()
               news[tempNum] = b.Function_ID
               mu.Unlock()
            }
            return nil
         },
      )

   }

   if err := eg.Wait(); err != nil {
      return err
   }

   return nil
}