2.5.0 - Duplicate param keys warning

[sqal]

Version

2.5.0

Reproduction link

https://jsfiddle.net/pznfxotj/

Steps to reproduce

1. Open reproduction link
2. Check console log

What is expected?

I expect no warnings in the console

What is actually happening?

Vue router shows warning

Duplicate param keys in route with path: "/confirm/:id/:token

when there are no duplicate keys in that route.

Worked fine in @2.4.0