From 04c2d6bbf6d52b78b0fab046ddbacf9cb73ca248 Mon Sep 17 00:00:00 2001
From: eight <eight04@gmail.com>
Date: Fri, 12 Oct 2018 01:49:52 +0800
Subject: [PATCH] Fix: throw receiving end doesn't exist message

---
 js/msg.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/js/msg.js b/js/msg.js
index b5a655d5..6e4f0d20 100644
--- a/js/msg.js
+++ b/js/msg.js
@@ -293,6 +293,9 @@ const msg = (() => {
 
   // {type, error, data, id}
   function unwrapData(result) {
+    if (result === undefined) {
+      throw new Error('Receiving end does not exist');
+    }
     if (result.type === 'exchange') {
       const pending = exchangeGet(result);
       if (pending) {