| error[E0503]: cannot use `u.c` because it was mutably borrowed | |
| --> $DIR/borrowck-union-borrow-nested.rs:36:21 | |
| | | |
| LL | let ra = &mut u.s.a; | |
| | ---------- borrow of `u.s.a` occurs here | |
| LL | let b = u.c; //~ ERROR cannot use `u.c` because it was mutably borrowed | |
| | ^^^ use of borrowed `u.s.a` | |
| LL | ra.use_mut(); | |
| | -- borrow later used here | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0503`. |