#![features(foo)]

fn main() {
    println!("{:?}", {
         bar
    });
}


/* ~~~~=== stderr ===~~~~
   Compiling playground v0.0.1 (file:///playground)
error[E0425]: cannot find value `bar` in this scope
 --> src/main.rs:5:10
  |
5 |          bar
  |          ^^^ not found in this scope

error[E0658]: The attribute `features` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
 --> src/main.rs:1:1
  |
1 | #![features(foo)]
  | ^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

error: Could not compile `playground`.

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

*/

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

*/