src/test/ui/macros/derive-in-eager-expansion-hang.rs

   1 // Regression test for the issue #44692
   2
   3 macro_rules! hang { () => {
   4     { //~ ERROR format argument must be a string literal
   5         #[derive(Clone)]
   6         struct S;
   7
   8         ""
   9     }
  10 }}
  11
  12 fn main() {
  13     format_args!(hang!());
  14 }