Rocket/core/lib/tests/unsound-local-request-1312.rs

// use rocket::http::Header;
// use rocket::local::Client;
//
// #[test]
// fn test_local_request_clone_soundness() {
//     let client = Client::new(rocket::ignite()).unwrap();
//
//     // creates two LocalRequest instances that shouldn't share the same req
//     let r1 = client.get("/").header(Header::new("key", "val1"));
//     let mut r2 = r1.clone();
//
//     // save the iterator, which internally holds a slice
//     let mut iter = r1.inner().headers().get("key");
//
//     // insert headers to force header map reallocation.
//     for i in 0..100 {
//         r2.add_header(Header::new(i.to_string(), i.to_string()));
//     }
//
//     // Replace the original key/val.
//     r2.add_header(Header::new("key", "val2"));
//
//     // Heap massage: so we've got crud to print.
//     let _: Vec<usize> = vec![0, 0xcafebabe, 31337, 0];
//
//     // Ensure we're good.
//     let s = iter.next().unwrap();
//     println!("{}", s);
//
//     // And that we've got the right data.
//     assert_eq!(r1.inner().headers().get("key").collect::<Vec<_>>(), vec!["val1"]);
//     assert_eq!(r2.inner().headers().get("key").collect::<Vec<_>>(), vec!["val1", "val2"]);
// }