| error[E0506]: cannot assign to `a.y` because it is borrowed | |
| --> $DIR/union.rs:20:5 | |
| | | |
| LL | let mut c = || { | |
| | -- `a.y` is borrowed here | |
| ... | |
| LL | let _ = &mut a; | |
| | - borrow occurs due to use in closure | |
| ... | |
| LL | a.y = 1; | |
| | ^^^^^^^ `a.y` is assigned to here but it was already borrowed | |
| ... | |
| LL | c(); | |
| | - borrow later used here | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0506`. |