error[E0502]: cannot borrow `u.a` as mutable because it is also borrowed as immutable
  --> $DIR/borrowck-union-borrow.rs:25:28
   |
LL |             let ra = &u.a;
   |                       --- immutable borrow occurs here
LL |             let rma = &mut u.a; //~ ERROR cannot borrow `u.a` as mutable because it is also borrowed as immutable
   |                            ^^^ mutable borrow occurs here
LL |             drop(ra);
LL |         }
   |         - immutable borrow ends here

error[E0506]: cannot assign to `u.a` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:30:13
   |
LL |             let ra = &u.a;
   |                       --- borrow of `u.a` occurs here
LL |             u.a = 1; //~ ERROR cannot assign to `u.a` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.a` occurs here

error[E0502]: cannot borrow `u` (via `u.b`) as mutable because `u` is also borrowed as immutable (via `u.a`)
  --> $DIR/borrowck-union-borrow.rs:46:28
   |
LL |             let ra = &u.a;
   |                       --- immutable borrow occurs here (via `u.a`)
LL |             let rmb = &mut u.b; //~ ERROR cannot borrow `u` (via `u.b`) as mutable because `u` is also borrowed as immutable (via `u.a`)
   |                            ^^^ mutable borrow of `u.b` -- which overlaps with `u.a` -- occurs here
LL |             drop(ra);
LL |         }
   |         - immutable borrow ends here

error[E0506]: cannot assign to `u.b` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:51:13
   |
LL |             let ra = &u.a;
   |                       --- borrow of `u.b` occurs here
LL |             u.b = 1; //~ ERROR cannot assign to `u.b` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.b` occurs here

error[E0502]: cannot borrow `u.a` as immutable because it is also borrowed as mutable
  --> $DIR/borrowck-union-borrow.rs:57:23
   |
LL |             let rma = &mut u.a;
   |                            --- mutable borrow occurs here
LL |             let ra = &u.a; //~ ERROR cannot borrow `u.a` as immutable because it is also borrowed as mutable
   |                       ^^^ immutable borrow occurs here
LL |             drop(rma);
LL |         }
   |         - mutable borrow ends here

error[E0503]: cannot use `u.a` because it was mutably borrowed
  --> $DIR/borrowck-union-borrow.rs:62:17
   |
LL |             let ra = &mut u.a;
   |                           --- borrow of `u.a` occurs here
LL |             let a = u.a; //~ ERROR cannot use `u.a` because it was mutably borrowed
   |                 ^ use of borrowed `u.a`

error[E0499]: cannot borrow `u.a` as mutable more than once at a time
  --> $DIR/borrowck-union-borrow.rs:67:29
   |
LL |             let rma = &mut u.a;
   |                            --- first mutable borrow occurs here
LL |             let rma2 = &mut u.a; //~ ERROR cannot borrow `u.a` as mutable more than once at a time
   |                             ^^^ second mutable borrow occurs here
LL |             drop(rma);
LL |         }
   |         - first borrow ends here

error[E0506]: cannot assign to `u.a` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:72:13
   |
LL |             let rma = &mut u.a;
   |                            --- borrow of `u.a` occurs here
LL |             u.a = 1; //~ ERROR cannot assign to `u.a` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.a` occurs here

error[E0502]: cannot borrow `u` (via `u.b`) as immutable because `u` is also borrowed as mutable (via `u.a`)
  --> $DIR/borrowck-union-borrow.rs:78:23
   |
LL |             let rma = &mut u.a;
   |                            --- mutable borrow occurs here (via `u.a`)
LL |             let rb = &u.b; //~ ERROR cannot borrow `u` (via `u.b`) as immutable because `u` is also borrowed as mutable (via `u.a`)
   |                       ^^^ immutable borrow of `u.b` -- which overlaps with `u.a` -- occurs here
LL |             drop(rma);
LL |         }
   |         - mutable borrow ends here

error[E0503]: cannot use `u.b` because it was mutably borrowed
  --> $DIR/borrowck-union-borrow.rs:83:17
   |
LL |             let ra = &mut u.a;
   |                           --- borrow of `u.a` occurs here
LL |             let b = u.b; //~ ERROR cannot use `u.b` because it was mutably borrowed
   |                 ^ use of borrowed `u.a`

error[E0499]: cannot borrow `u` (via `u.b`) as mutable more than once at a time
  --> $DIR/borrowck-union-borrow.rs:89:29
   |
LL |             let rma = &mut u.a;
   |                            --- first mutable borrow occurs here (via `u.a`)
LL |             let rmb2 = &mut u.b; //~ ERROR cannot borrow `u` (via `u.b`) as mutable more than once at a time
   |                             ^^^ second mutable borrow occurs here (via `u.b`)
LL |             drop(rma);
LL |         }
   |         - first borrow ends here

error[E0506]: cannot assign to `u.b` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:94:13
   |
LL |             let rma = &mut u.a;
   |                            --- borrow of `u.b` occurs here
LL |             u.b = 1; //~ ERROR cannot assign to `u.b` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.b` occurs here

error: aborting due to 12 previous errors

Some errors occurred: E0499, E0502, E0503, E0506.
For more information about an error, try `rustc --explain E0499`.