Response.redirect with relative URLs not working for Route Handlers

Link to the code that reproduces this issue

https://github.com/vercel/redirect-reproduction

To Reproduce

Actual

Navigate to localhost:3000/test
See error below

 ⨯ TypeError: Failed to parse URL from /test
    at Response.redirect (node:internal/deps/undici/undici:4393:17)
    at GET (/Users/leerob/Developer/scratch/repro/.next/server/chunks/[root of the server]__1d2930._.js:31:21)
    ... 38 lines matching cause stack trace ...
    at async Server.requestListener (/Users/leerob/Developer/scratch/repro/node_modules/.pnpm/next@15.0.0-canary.73_react-dom@19.0.0-rc-512b09b2-20240718_react@19.0.0-rc-512b09b2-20240718_kqhq7uzfl3zawjcrarvtpd6ica/node_modules/next/dist/server/lib/start-server.js:142:13) {
  [cause]: TypeError: Invalid URL
      at new URL (node:internal/url:797:36)
      at Response.redirect (node:internal/deps/undici/undici:4391:23)
      at GET (/Users/leerob/Developer/scratch/repro/.next/server/chunks/[root of the server]__1d2930._.js:31:21)
      at /Users/leerob/Developer/scratch/repro/node_modules/.pnpm/next@15.0.0-canary.73_react-dom@19.0.0-rc-512b09b2-20240718_react@19.0.0-rc-512b09b2-20240718_kqhq7uzfl3zawjcrarvtpd6ica/node_modules/next/dist/compiled/next-server/app-route.runtime.dev.js:6:66499
      at /Users/leerob/Developer/scratch/repro/node_modules/.pnpm/next@15.0.0-canary.73_react-dom@19.0.0-rc-512b09b2-20240718_react@19.0.0-rc-512b09b2-20240718_kqhq7uzfl3zawjcrarvtpd6ica/node_modules/next/dist/server/lib/trace/tracer.js:173:36
      at NoopContextManager.with (/Users/leerob/Developer/scratch/repro/node_modules/.pnpm/next@15.0.0-canary.73_react-dom@19.0.0-rc-512b09b2-20240718_react@19.0.0-rc-512b09b2-20240718_kqhq7uzfl3zawjcrarvtpd6ica/node_modules/next/dist/compiled/@opentelemetry/api/index.js:1:7062)

Current vs. Expected behavior

Expected

Navigate to localhost:3000/test
Redirects to localhost:3000

Note that this does work as expected:

import { redirect } from 'next/navigation';

export async function GET(request: Request) {
  redirect('/test');
}

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 23.4.0: Fri Mar 15 00:10:42 PDT 2024; root:xnu-10063.101.17~1/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10
Binaries:
  Node: 20.15.1
  npm: 10.7.0
  Yarn: 1.22.21
  pnpm: 9.4.0
Relevant Packages:
  next: 15.0.0-canary.73 // Latest available version is detected (15.0.0-canary.73).
  eslint-config-next: N/A
  react: 19.0.0-rc-512b09b2-20240718
  react-dom: 19.0.0-rc-512b09b2-20240718
  typescript: 5.5.3
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

Navigation

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

No response

We could not detect a valid reproduction link. Make sure to follow the bug report template carefully.

Why was this issue closed?

To be able to investigate, we need access to a reproduction to identify what triggered the issue. We need a link to a public GitHub repository (template for App Router, template for Pages Router), but you can also use these templates: CodeSandbox: App Router or CodeSandbox: Pages Router.

The bug template that you filled out has a section called "Link to the code that reproduces this issue", which is where you should provide the link to the reproduction.

If you did not provide a link or the link you provided is not valid, we will close the issue.
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What should I do?

Depending on the reason the issue was closed, you can do the following:

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In general, assume that we should not go through a lengthy onboarding process at your company code only to be able to verify an issue.

My repository is private and cannot make it public

In most cases, a private repo will not be a sufficient minimal reproduction, as this codebase might contain a lot of unrelated parts that would make our investigation take longer. Please do not make it public. Instead, create a new repository using the templates above, adding the relevant code to reproduce the issue. Common things to look out for:

Remove any code that is not related to the issue. (pages, API routes, components, etc.)
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Remove any environment variables that are not related to the issue.
Remove private packages that we do not have access to.
If the issue is not related to a monorepo specifically, try to reproduce the issue without a complex monorepo setup

I did not open this issue, but it is relevant to me, what can I do to help?

Anyone experiencing the same issue is welcome to provide a minimal reproduction following the above steps by opening a new issue.

I think my reproduction is good enough, why aren't you looking into it quickly?

We look into every Next.js issue and constantly monitor open issues for new comments.

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vercel / next.js