src/test/ui/issues/issue-65131.rs

   1 fn get_pair(_a: &mut u32, _b: &mut u32) {}
   2
   3 macro_rules! x10 {
   4     ($($t:tt)*) => {
   5         $($t)* $($t)* $($t)* $($t)* $($t)*
   6         $($t)* $($t)* $($t)* $($t)* $($t)*
   7     }
   8 }
   9
  10 #[allow(unused_assignments)]
  11 fn main() {
  12     let mut x = 1;
  13
  14     get_pair(&mut x, &mut x);
  15     //~^ ERROR: cannot borrow `x` as mutable more than once at a time
  16
  17     x10! { x10!{ x10!{ if x > 0 { x += 2 } else { x += 1 } } } }
  18 }