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