Vue: Trying to access non-existent property "outerHTML" while rendering

[finico]

I noticed that strange warning is displayed to the console

Vue.js version

2.0.0-beta.3

Reproduction Link

http://jsbin.com/yujokuhura

Steps to reproduce

Click on div with text "click me"

What is Expected?

In the console will appear instance of Vue app

What is actually happening?

In the console will appear warning [Vue warn]: Trying to access non-existent property "outerHTML" while rendering. Make sure to declare reactive data properties in the data option. (found in root instance)

ps: in the v1.0.16 all ok

[LinusBorg]

This is a problem with jsbin. It works fine on jsfiddle, for example: https://jsfiddle.net/vx0ks9yo/

[finico]

Yup.. and the locally all is well
Not a bug :yay:

[jakob-e]

This is also the case on _codepen.io_ in _editor view_