Uncaught TypeError: Cannot read property 'send' of undefined

[nightire]

During development of a new add-on, I noticed an error that caused by ember-inspector.

In order to help solve this issue more effectively, I prepare a reproduction repo at: https://github.com/very-geek/ember-plyr

Follow these steps to reproduce:

1. npm install
2. ember serve
3. open http://localhost:4200/tests
   at this stage, all tests should be passed
4. open chrome devtools (assuming using google chrome)
5. switch to ember inspector tab
6. refresh page
   now you should see the error, and some test cases should fail:

VM10735:2371 Uncaught TypeError: Cannot read property 'send' of undefined
    at Class.sendMessage (<anonymous>:2371:23)
    at Class.sendCount (<anonymous>:842:12)
    at invoke (backburner.js:249)
    at Queue.flush (backburner.js:167)
    at DeferredActionQueues.flush (backburner.js:326)
    at Backburner._end (backburner.js:748)
    at Backburner.end (backburner.js:513)
    at Backburner._runExpiredTimers (backburner.js:851)

[nlfurniss]

Error happens here when at some point this.get('port') is undefined

[thorsteinsson]

Thanks for creating a reproduction repo, it helped me track it down quickly.