Global mixin taking precedence for custom options

[skirtles-code]

Version

3.0.0-rc.9

Reproduction link

https://jsfiddle.net/skirtle/xcrwq9n6/

Steps to reproduce

Check the console log.

What is expected?

The value hello! should be logged.

The value from the global mixin should be overridden by the value on the component itself.

What is actually happening?

The value goodbye! is logged.

---

The equivalent example in Vue 2 works as expected: https://jsfiddle.net/skirtle/cdgf1omx/