From 2074324e117d241a28b9dd096a07bbbd95f876da Mon Sep 17 00:00:00 2001
From: skanehira <sho19921005@gmail.com>
Date: Sun, 3 Nov 2019 09:54:51 +0900
Subject: [PATCH] imporve when no json specified

---
 main.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/main.go b/main.go
index daa4c1d..817cd93 100644
--- a/main.go
+++ b/main.go
@@ -67,6 +67,10 @@ func run() int {
 		}
 	}
 
+	if i == nil {
+		return printError(gui.ErrEmptyJSON)
+	}
+
 	if err := gui.New().Run(i); err != nil {
 		log.Println(err)
 		return 1