error: multiple unused formatting arguments --> $DIR/issue-89173.rs:7:20 | LL | print!("%0*x", width, num); | ------ ^^^^^ ^^^ argument never used | | | | | argument never used | multiple missing formatting specifiers | note: format specifiers use curly braces, and you have to use a positional or named parameter for the width --> $DIR/issue-89173.rs:7:13 | LL | print!("%0*x", width, num); | ^^^^ = note: printf formatting is not supported; see the documentation for `std::fmt` error: aborting due to 1 previous error