Version

3.0.0

Reproduction link

https://codepen.io/robotdood/pen/mdPoGQz

Steps to reproduce

Check console to view "Unhandled error during execution of render function at " error.

In production I also received this error: "Unhandled error during execution of scheduler flush. This is likely a Vue internals bug. Please open an issue at https://new-issue.vuejs.org/?repo=vuejs/vue-next"

What is expected?

Maybe a more explicit error: "v-for does not work with non-interger values. See https://v3.vuejs.org/guide/list.html#displaying-filtered-sorted-results"

What is actually happening?

See "steps to reproduce"

This might seem obvious, but in my case the (non-)integer was coming from a computed value and thus not as easy to track down.