Yes, certainly! The issue you're encountering is because the string literals "fizzbuzz", "fizz", and "buzz" are temporary values, and you are trying to return a reference to them, which is not allowed because they will be dropped at the end of the scope, and the returned reference would be dangling.

You can fix this error by returning &'static str instead of &str. &'static str refers to string literals, which have a 'static lifetime, meaning they last for the duration of the program. Here's an updated version of your code:

fn fizzbuzz(n: usize) -> &'static str {
    match (n % 3, n % 5) {
        (0, 0) => "fizzbuzz",
        (0, _) => "fizz",
        (_, 0) => "buzz",
        _ => {
            let s = n.to_string();
            Box::leak(s.into_boxed_str())
        }
    }
}

Note that the last arm returns a &'static str that is created from a String using the Box::leak function, which takes ownership of a Box<T> and returns a pointer to its contents, effectively leaking it. This is safe because the returned pointer will last for the duration of the program, but it should be used with care as it will not be cleaned up automatically.
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