[Bug]: variable is not defined with re-exports

### Reproduction link or steps

https://stackblitz.com/edit/vh8pztjx?file=rolldown.config.mts
- `pnpm build && node dist/index.js`

### What is expected?

No errors

### What is actually happening?

```
ReferenceError: t$1 is not defined
```

### System Info

```Shell
N/A
```

### Any additional comments?

Found this bug on React Router: https://github.com/remix-run/react-router/pull/14423