unreachable code

#![allow(unreachable_code)]


fn main() {
    println!("{:?}", {
        let () = std::collections::HashMap::new().entry("foo");
    });
}


/* ~~~~=== stderr ===~~~~
   Compiling playground v0.0.1 (/playground)
error[E0308]: mismatched types
 --> src/main.rs:6:13
  |
6 |         let () = std::collections::HashMap::new().entry("foo");
  |             ^^ expected enum `std::collections::hash_map::Entry`, found ()
  |
  = note: expected type `std::collections::hash_map::Entry<'_, &str, _>`
             found type `()`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
error: Could not compile `playground`.

To learn more, run the command again with --verbose.

*/

/* ~~~~=== stdout ===~~~~

*/