Add failing test for top-level errors with dynamicIO

test/development/app-dir/dynamic-io-dev-errors/app/top-level-error/page.tsx

@@ -0,0 +1,5 @@
+export default async function Page() {
+  throw new Error('Kaputt!')
+
+  return <p>This page always errors.</p>
+}

test/development/app-dir/dynamic-io-dev-errors/dynamic-io-dev-errors.test.ts

@@ -43,6 +43,21 @@ describe('Dynamic IO Dev Errors', () => {
     )
   })
 
+  it('should not log unhandled rejections for persistently thrown top-level errors', async () => {
+    const cliOutputLength = next.cliOutput.length
+    const res = await next.fetch('/top-level-error')
+    expect(res.status).toBe(500)
+
+    await retry(() => {
+      const cliOutput = next.cliOutput.slice(cliOutputLength)
+      expect(cliOutput).toContain('GET /top-level-error 500')
+    })
+
+    expect(next.cliOutput.slice(cliOutputLength)).not.toContain(
+      'unhandledRejection'
+    )
+  })
+
   // NOTE: when update this snapshot, use `pnpm build` in packages/next to avoid next source code get mapped to source.
   it('should display error when component accessed data without suspense boundary', async () => {
     const outputIndex = next.cliOutput.length