next.js/test/integration/app-dynamic-error/app/dynamic-error/page.js

import { headers } from 'next/headers'

export const dynamic = 'error'

export default async function Page() {
  await headers()
  return (
    <>
      <p id="page">/dynamic-error</p>
      <p id="date">{Date.now()}</p>
    </>
  )
}