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// { "preopens": { "/fixture": "fixture", "/scratch": "scratch" } }
fn main() {  assert!(    std::fs::hard_link("/fixture/file", "/scratch/hardlink_to_file").is_ok()  );  assert_eq!(    std::fs::read("/fixture/file").unwrap(),    std::fs::read("/scratch/hardlink_to_file").unwrap()  );}