fn main() {
    println!("{:?}", {
        fn c() -> impl std::ops::Add {1}
    });
}


/* ~~~~=== stderr ===~~~~
   Compiling playground v0.0.1 (file:///playground)

thread 'rustc' has overflowed its stack
fatal runtime error: stack overflow
error: Could not compile `playground`.

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

*/

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

*/