error[E0060]: this function takes at least 1 argument but 0 arguments were supplied --> $DIR/E0060.rs:6:14 | LL | unsafe { printf(); } | ^^^^^^-- an argument of type `*const u8` is missing | note: function defined here --> $DIR/E0060.rs:2:8 | LL | fn printf(_: *const u8, ...) -> u32; | ^^^^^^ help: provide the argument | LL | unsafe { printf(/* *const u8 */); } | ~~~~~~~~~~~~~~~~~ error: aborting due to previous error For more information about this error, try `rustc --explain E0060`.