src/test/ui/closures/2229_closure_analysis/diagnostics/union.rs

   1 // edition:2021
   2
   3 // Test that we point to the correct location that results a union being captured.
   4 // Union is special because it can't be disjointly captured.
   5
   6 union A {
   7     y: u32,
   8     x: (),
   9 }
  10
  11 fn main() {
  12     let mut a = A { y: 1 };
  13     let mut c = || {
  14     //~^ borrow of `a.y` occurs here
  15         let _ = unsafe { &a.y };
  16         let _ = &mut a;
  17         //~^ borrow occurs due to use in closure
  18         let _ = unsafe { &mut a.y };
  19     };
  20     a.y = 1;
  21     //~^ cannot assign to `a.y` because it is borrowed [E0506]
  22     //~| assignment to borrowed `a.y` occurs here
  23     c();
  24     //~^ borrow later used here
  25 }