readFormData doesn't work on cloudflare workers (vercel-edge)

[cosbgn]

Environment

nuxt 3.7.1

Reproduction

export default defineEventHandler(async (event) => {
	console.log("start 1")
	const form = await readFormData(event)
	console.log("start 2")
})

It logs start 1 and then it hung until it eventually dies with a 502.

Describe the bug

When I await readFormData(event) it never resolves and eventually it dies with a 502.

Additional context

Tested on vercel-edge

Logs

No response

[pi0]

Thanks for making issue. I have managed to make a minimal reproduction with h3 and vercel-edge isolated from nitro (don't ask me how! emulating builder output is a mess..) but anyway it works as expected: https://h3-on-vercel-edge.vercel.app/

This seems a bug originating from how nitro handles request body for vercel edge. So let's keep tracking it there (nitrojs/nitro#1718 > nitrojs/nitro#1721)