From f914d76ce8fecb74bbddb673595c32000d0fa78f Mon Sep 17 00:00:00 2001
From: Shin'ya Ueoka <ueokande@i-beam.org>
Date: Sat, 28 Jul 2018 22:51:58 +0900
Subject: Fix error on keyword not found

---
 src/background/infrastructures/content-message-listener.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/background/infrastructures/content-message-listener.js')

diff --git a/src/background/infrastructures/content-message-listener.js b/src/background/infrastructures/content-message-listener.js
index 58716fb..4fcc6a6 100644
--- a/src/background/infrastructures/content-message-listener.js
+++ b/src/background/infrastructures/content-message-listener.js
@@ -19,7 +19,11 @@ export default class ContentMessageListener {
   run() {
     browser.runtime.onMessage.addListener((message, sender) => {
       try {
-        return this.onMessage(message, sender).catch((e) => {
+        let ret = this.onMessage(message, sender);
+        if (!(ret instanceof Promise)) {
+          return {};
+        }
+        return ret.catch((e) => {
           return browser.tabs.sendMessage(sender.tab.id, {
             type: messages.CONSOLE_SHOW_ERROR,
             text: e.message,
-- 
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