error[E0716]: temporary value dropped while borrowed
 --> src/main.rs:6:25
  |
6 |     source = r#"{{ Some("x".to_string().as_str()).unwrap() }}"#
  |                    ---- ^^^^           - temporary value is freed at the end of this statement
  |                    |    |
  |                    |    creates a temporary value which is freed while still in use
  |                    borrow later used here
  |
  = note: consider using a `let` binding to create a longer lived value

use askama::Template;

#[derive(Template)]
#[template(
    ext = "html",
    source = r#"{{ Some("x".to_string().as_str()).unwrap() }}"#
)]
struct Tpl {
}

fn main() {
    eprintln!("{}", Tpl{}.render().unwrap());
    eprintln!("{}", Some("x".to_string().as_str()).unwrap());
}