error[E0503]: cannot use `u.c` because it was mutably borrowed | |
--> $DIR/borrowck-union-borrow-nested.rs:36:17 | |
| | |
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` | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0503`. |