To Reproduce

1. npx create-next-app@latest --experimental-app
2. npm install next@canary (currently is 13.0.3-canary.1)
3. npm run build (this finishes successfully)
4. Add a /app/blog/[slug]/page.tsx file as defined in the docs.
5. npm run build (this fails)

Error

Type error: Page "app/blog/[slug]/page.tsx" does not match the required types of a Next.js Page.
  Invalid configuration:
    The exported page component isn't correctly typed.
        Expected "{ params: { slug: string; }; searchParams: { id: string; }; }", got "PageProps".