Next.js 15 redirect() to parallel route causes infinite reload

[dalkommatt]

Link to the code that reproduces this issue

https://github.com/dalkommatt/redirect-parallel-route-infinite-reload

To Reproduce

1. pnpm dlx create-next-app@rc
2. Create @modal parallel route with (.)login, catchAll and default
   

export default function ModalLoginPage() {
  return (
    <div className="absolute inset-0 flex items-center justify-center bg-black/[.5] dark:bg-white/[.5]">
      <h1>Login here</h1>;
    </div>
  );
}

export default function CatchAll() {
    return null
  }

export default function Default() {
  return null
}

3. Create a /login route
   

export default function LoginPage() {
  return <h1>Login here</h1>;
}

4. redirect('/login') from '/'

export default function Home() {
 const user = false;
 if (!user) {
   redirect("/login");
 }
/* default home page return */

Current vs. Expected behavior

Current: Infinitely reloads /login
Expected: Opens model route

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Education
  Available memory (MB): 32506
  Available CPU cores: 16
Binaries:
  Node: 18.18.0
  npm: N/A
  Yarn: N/A
  pnpm: 9.0.4
Relevant Packages:
  next: 15.0.0-rc.0 // Latest available version is detected (15.0.0-rc.0).
  eslint-config-next: 15.0.0-rc.0
  react: 19.0.0-rc-f994737d14-20240522
  react-dom: 19.0.0-rc-f994737d14-20240522
  typescript: 5.5.3
Next.js Config:
  output: N/A

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

create-next-app, Navigation, Parallel & Intercepting Routes, TypeScript

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

next dev (local), next start (local), Vercel (Deployed)

Additional context

Tested on both RC and canary versions of Next.js 15

[sang-onbpad]

I also meet the same issue. I realized that the problem is all slots don't have same routes. For example, in @children slot includes /page.tsx but @modal doesn't. So please try add /page.tsx as default.tsx to your @modal slot will resolve problem. Please guarantee all your slots includes same route even though there is return empty.

[dalkommatt]

I also meet the same issue. I realized that the problem is all slots don't have same routes. For example, in @children slot includes /page.tsx but @modal doesn't. So please try add /page.tsx as default.tsx to your @modal slot will resolve problem. Please guarantee all your slots includes same route even though there is return empty.

@sang-onbpad I'm not sure I follow. Adding a page.tsx with a null return to /@modal did not seem to solve the problem. Please create a PR on the repo with your fix.