Unable to merge options for navigation guard mixin to Vue component

[ColinLaws]

Version

3.0.1

Reproduction link

https://jsbin.com/zaxupuj/edit?html,js

Steps to reproduce

Create a file that exports an object containing an in-component navigation guard for beforeRouteEnter. The code contained within this guard does not effect the issue from occurring. Create a Vue component, register it, and then on that Vue component, attempt to use that mixin. Also make sure that you are using vue-router as a plugin, and that the component that you are navigating to with your vue-router is the vue component that you added the mixin with the naviation guard to.

What is expected?

I expected the beforeRouteEnter guard to be executed as if it had existed within the Vue component that I was navigating to using vue-router.

What is actually happening?

I am encountering an exception when Vue is attempting to call checkComponent with 'TypeError: options is undefined'. Here is a stack trace if it helps.

checkComponents@http://twidur.com/js/app.js:23199:1 mergeOptions@http://twidur.com/js/app.js:23320:5 mergeOptions@http://twidur.com/js/app.js:23336:16 initExtend/Vue.extend@http://twidur.com/js/app.js:26615:19 extractGuard@http://twidur.com/js/app.js:3175:11 extractGuards/guards<@http://twidur.com/js/app.js:3159:17

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(1) This is my first issue I've submitted, sorry if it is not structured the way you like Evan, I know you're picky.

(2) This issue existed before and was fixed with Pull request #1521 on Jun 28, 2017

(3) If my JSBin is garbage, I do apologize! Never used that either, I usually don't make these types of reports because Vue is so well built :)

[ColinLaws]

Apologies, my error was with something else. Vue didn't like it when I used an import statement to a file where a class was being instantiated and then used inside of the beforeRouteEnter guard as a helper function.