Server routers can't return 401 responses

[masylum]

Which project does this relate to?

Router

Describe the bug

Whenever I try to return a 401 response, tanstack router chokes.

Your Example Website or App

pasted the code below

Steps to Reproduce the Bug or Issue

export const Route = createFileRoute("/api/workers/")({
server: {
handlers: {
POST: async ({ request }) => {
return Response.json({ error: "unauthorized" }, { status: 401 })
},
},
},
})
[vite] Internal server error: fetch failed
at Object.processResponse (/Users/pao/repos/ramensoft/node_modules/.pnpm/undici@7.24.4/node_modules/undici/lib/web/fetch/index.js:237:16)
at /Users/pao/repos/ramensoft/node_modules/.pnpm/undici@7.24.4/node_modules/undici/lib/web/fetch/index.js:1081:19
at node:internal/process/task_queues:151:7
at AsyncResource.runInAsyncScope (node:async_hooks:214:14)
at AsyncResource.runMicrotask (node:internal/process/task_queues:148:8)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at /Users/pao/repos/ramensoft/node_modules/.pnpm/undici@7.24.4/node_modules/undici/index.js:157:7
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)

Change that status to anything else and it works

Expected behavior

It should work

Screenshots or Videos

No response

Platform

@cloudflare/vite-plugin 1.32.2
@tanstack/react-router 1.168.10
@tanstack/react-start 1.167.16
vite 8.0.0

Additional context

No response

[masylum]

oh wait, this looks like a miniflare bug. Sorry. cloudflare/workers-sdk#13450