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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 not supported; see the documentation for `std::fmt`

error: aborting due to previous error