Prerender hangs indefinitely if `prerender.filter` returns zero true results

[kompot]

Which project does this relate to?

Start

Describe the bug

Build hangs if prerender filter function return 0 trues.

Succeedes if at least one true result is returned.

Your Example Website or App

https://github.com/kompot/tanstack-router-prerender-hangs

Steps to Reproduce the Bug or Issue

1. Clone repo
2. pnpm install
3. vite build hangs indefinitely.
4. Replace https://github.com/kompot/tanstack-router-prerender-hangs/blob/038b8b4331eed5097a2c6c741a7a8c56e6da033f/vite.config.ts#L18 with return route.path === "/blocked" (actually existing page) and build succeedes.

Expected behavior

Build should pass anyway. In case 0 pages are left by filter then it might be some kind of warning that filter function was set but it returned 0 pages and thus nothing was prerendered.

Screenshots or Videos

No response

Platform

• Router / Start Version: [e.g. 1.153.2]
• OS: macOS
• Bundler: vite
• Bundler Version: 8.0.0 beta 8

Additional context

No response

[diffnull]

Even without filter it hangs for me as well, on the following config

    tanstackStart({
      prerender: {
        enabled: true,
        concurrency: 1,
      }
   })

I've tried different combinations of options but with no success. It just always hangs at the build step.