Search params get stripped if validateSearch throws and beforeLoad redirects

[Sheraff]

Which project does this relate to?

Router

Describe the bug

If a route has both a validateSearch and a beforeLoad that redirects:

export const Route = createFileRoute('/about')({
  validateSearch: zod.object({
    a: zod.number(),
  }),
  beforeLoad: async ({ search }) => {
    throw redirect({ to: '/third', search });
  },
});

When landing on such page with an invalid search, the search object forwarded through the redirection is an empty object.

Your Example Website or App

https://stackblitz.com/edit/tanstack-router-yhzqerey?file=src%2Froutes%2Fabout.tsx

Steps to Reproduce the Bug or Issue

1. from the / homepage on the stackblitz repro above
2. click on the "to about page with search" link

Expected behavior

I would have expected either:

• to remain on the "/about" page, in an error state (errorComponent)
• or to be redirected to the "/third" page, with the search untouched

But instead, we're redirected correctly, but the search becomes an empty object. There is no indication of an error:

• no errorComponent gets mounted
• no onError callback gets called

Screenshots or Videos

No response

Platform

• OS: macOS
• Browser: Chrome
• Version: 1.95.1

Additional context

No response

[KubaJastrz]

It doesn't even have to have a redirect in beforeLoad. Simply throwing from validateSearch is clearing the search object: https://stackblitz.com/edit/tanstack-router-2yjazrv7?file=src%2Froutes%2Fabout.tsx (tested with 1.98.0)

We have an app that relies on search params heavily and if they get cleared at any point then it's a dead end for the user :/ The only workaround for now is to validate params manually in loaders, but then the type-safety is all messed up.