Vue-router: beforeEnter next callback is not called

[rominf]

Version

2.5.22

Reproduction link

https://jsfiddle.net/2ykhv8jq/

Steps to reproduce

Create a route with beforeEnter handler which calls next with a callback function.

In jsfiddle.net click the button and check the console.

What is expected?

"Am i called" and the vm should be present.

What is actually happening?

Line with "Am i called" is not present.

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Code borrowed from https://github.com/vuejs/vue-router/issues/737#issuecomment-446565958

[LinusBorg]

A callback is only supported in the in-component beforeRoutEnter guard.

[rominf]

Is there a good reason for this? It's inconvenient!