wrong v-for Map typings?

[j4k0xb]

when iterating through a map, its typically done like this:

<div v-for="[key, value] in map"

My attempt of also accessing the index:

<div v-for="([key, value], a, b) in map"

a is typed as keyof Map (all the 'clear', 'delete', etc. methods)
and b is typed as a number

but actually a is the index and b is always undefined (when printing it)
bug in volar?

[johnsoncodehk]

This is a bug, please track #544.

Reference: https://github.com/vuejs/vue-next/blob/ca17162e377e0a0bf3fae9d92d0fdcb32084a9fe/packages/runtime-core/src/helpers/renderList.ts#L77-L80