Re-exported `default` from `route.ts` breaks `{ loaderData }` component prop passing

### I'm using React Router as a... framework ### Reproduction ```diff diff --git a/integration/fs-routes-test.ts b/integration/fs-routes-test.ts index 1a5d6122a..bcea114d0 100644 --- a/integration/fs-routes-test.ts +++ b/integration/fs-routes-test.ts @@ -129,6 +129,22 @@ test.describe("fs-routes", () => { } `, + "app/routes/default-re-export/route.ts": js` + /* + // This works, but the below does not. + import Component from "./Component.tsx"; + export default Component; + */ + export { default } from "./Component.tsx"; + export const loader = () => ({data: "data"}); + `, + + "app/routes/default-re-export/Component.tsx": js` + export default function ({loaderData}) { + return

Default Re-export {loaderData.data}

; + } + `, + [`app/routes/ignored-route.jsx`]: js` export default function () { return

i should 404

; @@ -218,6 +234,18 @@ test.describe("fs-routes", () => {

Root

Dashboard Layout

Dashboard Index

+`); + }); + + test("renders matching routes (with default re-exported)", async ({ page }) => { + let app = new PlaywrightFixture(appFixture, page); + await app.goto("/default-re-export"); + expect(await app.getHtml("#content")).toBe(` +

Root

+

+ Default Re-export + data +

`); }); } ``` ### System Info ```shell System: OS: macOS 15.1.1 CPU: (8) arm64 Apple M1 Memory: 87.45 MB / 16.00 GB Shell: 5.9 - /bin/zsh Binaries: Node: 20.16.0 - ~/.local/share/mise/installs/node/20/bin/node Yarn: 1.22.17 - ~/.local/share/mise/installs/yarn/1.22.17/bin/yarn npm: 10.8.1 - ~/.local/share/mise/installs/node/20/bin/npm pnpm: 9.11.0 - ~/.local/share/mise/installs/pnpm/9.11.0/bin/pnpm Browsers: Chrome: 131.0.6778.86 Safari: 18.1.1 npmPackages: vite: ^5.1.0 => 5.1.3 ``` ### Used Package Manager pnpm ### Expected Behavior When re-exporting component from a route, it should still allow `{loaderData}` props to work (and not required `useLoaderData`) This currently works: ```ts import Component from "./Component.tsx"; export default Component; export const loader = () => ({data: "loader"}); ``` This is currently broken: ```ts export { default } from "./Component.tsx"; export const loader = () => ({data: "loader"}); ``` Where `./Component.tsx` is ```tsx export default function Component({loaderData}) { return {loaderData.data} } ``` ### Actual Behavior An error is thrown that `loaderData.data` fails due to `loaderData` being undefined.