Exiting app will cause "Uncaught Exception"

Created by: tianshuo

Description

在mac下，当程序在扫二维码状态（长期停留），按ctrl-q会试图退出报错，并且不退出。通过Electronic Wechat菜单=>Quit(ctrl-q)，出现一样的错误。

Specifications

• Version of Electron (run $ electron --version): v1.4.0
• OS: Mac OS 10.12 (16A323)
• Stack trace from the error message (if any)

A JavaScript error occurred in the main process

Uncaught Exception:
Error: Attempting to call a function in a renderer window that has been closed or released. Function provided here: undefined.
    at callIntoRenderer (/Applications/Electronic WeChat.app/Contents/Resources/electron.asar/browser/rpc-server.js:189:19)
    at MenuItem.click (/Applications/Electronic WeChat.app/Contents/Resources/electron.asar/browser/api/menu-item.js:59:9)
    at Function.executeCommand (/Applications/Electronic WeChat.app/Contents/Resources/electron.asar/browser/api/menu.js:121:15)