Code shared from the Rust Playground

playground.rs

struct PrintInDrop(&'static str);

impl Drop for PrintInDrop {
    fn drop(&mut self) {
        println!("{}", self.0);
    }
}

fn bar(_: &PrintInDrop) -> PrintInDrop {
    PrintInDrop("ret")
}

fn okok() -> PrintInDrop {
    let _foo = PrintInDrop("foo");

    bar(&PrintInDrop("temp"))
}

fn main() {
    okok();
}