Compiling korasho v0.1.0 (file:///Users/bjorn/projects/korasho) :1:33: 1:58 error: invalid reference to argument `0` (no arguments given) :1 ( $ fmt : expr ) => ( print ! ( concat ! ( $ fmt , "\n" ) ) ) ; ( ^~~~~~~~~~~~~~~~~~~~~~~~~ :1:33: 1:58 note: in this expansion of concat! :2:25: 2:56 note: in this expansion of format_args! :1:23: 1:60 note: in this expansion of print! (defined in ) src/main.rs:143:5: 143:29 note: in this expansion of println! (defined in ) error: aborting due to previous error Could not compile `korasho`. To learn more, run the command again with --verbose.