#![feature(catch_expr)]

fn main() {
    println!("{:?}", {
         do catch { 4 }
    });
}


/* ~~~~=== stderr ===~~~~
   Compiling playground v0.0.1 (file:///playground)
error[E0284]: type annotations required: cannot resolve `<_ as std::ops::Try>::Ok == _`
 --> src/main.rs:5:19
  |
5 |          do catch { 4 }
  |                   ^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0284`.
error: Could not compile `playground`.

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

*/

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

*/