defer func() {
			if debugPrint {
				fmt.Printf("grid: Handler returning from: %v %v\n", req.Method, req.URL)
			}
			if r := recover(); r != nil {
				debug.PrintStack()
				err := fmt.Errorf("grid: panic: %v\n", r)
				gridLogIf(context.Background(), err, err.Error())
				w.WriteHeader(http.StatusInternalServerError)
			}
		}()
		if debugPrint {