[cloudflare_module]: Attempting to call readRawBody in a Nitro route for a DELETE request throws a 500 error and terminates the request

Environment

------------------------------
- Operating System: Darwin
- Node Version:     v22.14.0
- Nuxt Version:     4.1.3
- CLI Version:      3.29.3
- Nitro Version:    2.12.6
- Package Manager:  pnpm@10.18.3
- Builder:          -
- User Config:      -
- Runtime Modules:  -
- Build Modules:    -
------------------------------

Reproduction

Reproduction requires deploying into the actual Cloudflare Worker environment. Running wrangler locally does not surface the issue.

We deploy with the cloudflare-worker Nitro preset.

main = "./.output/server/index.mjs"
assets = { directory = "./.output/public/", binding = "ASSETS" }
name = "my-worker"
workers_dev = false
preview_urls = true
compatibility_date = "2025-09-15"
compatibility_flags = [
  "nodejs_compat",
  "no_nodejs_compat_v2", # https://github.com/unjs/unenv/issues/364#issuecomment-2575237049
]
rules = [
  { type = "ESModule", globs = ["**/*.js", "**/*.mjs"]},
]
minify = true
logpush = true
send_metrics = true
upload_source_maps = true
find_additional_modules = true # See https://github.com/unjs/unenv/issues/364#issuecomment-2734680242
[observability]
enabled = true

// foo.delete.ts

// ...more code

// Calling `readRawBody` here immediately throws a 500 error and terminates the request on Cloudflare
const body = ['PATCH', 'POST', 'PUT', 'DELETE'].includes(event.method) ? await readRawBody(event, 'utf-8') : undefined

// ...more code

return sendProxy(event, ...)

Describe the bug

Attempting to call readRawBody in a Nitro route for a DELETE request throws a 500 error and terminates the request

Additional context

Even if you explicitly send body: undefined to the endpoint, calling await readRawBody(event, 'utf-8') in the Nitro endpoint appears to throw the error.

Logs

Start with the foo.delete.ts reproduction and the readRawBody call under the cloudflare-worker Nitro preset. Deploy it to an actual Cloudflare Worker, since local wrangler does not reproduce the failure, and inspect the request handling for DELETE bodies. Done means readRawBody no longer produces a 500 error or terminates the request.