#[prelude_import]
use ::std::prelude::rust_2015::*;
#[macro_use]
extern crate std;
// compile-flags: -Zunpretty=hir -Zflatten-format-args=yes
// check-pass

fn main() {
        let x = 1;
        // Should flatten to println!("a 123 b {x} xyz\n"):
        {
                ::std::io::_print(format_arguments::new_v1(&["a 123 b ",
                                    " xyz\n"], &[format_argument::new_display(&x)]));
            };
    }