error[E0502]: cannot borrow `u.a` as mutable because it is also borrowed as immutable
  --> $DIR/borrowck-union-borrow.rs:37:23
   |
LL |             let ra = &u.a;
   |                      ---- immutable borrow occurs here
LL |             let rma = &mut u.a; //[ast]~ ERROR cannot borrow `u.a` as mutable because it is also borrowed as immutable
   |                       ^^^^^^^^ mutable borrow occurs here
LL |                                 //[mir]~^ ERROR cannot borrow `u.a` as mutable because it is also borrowed as immutable
LL |             drop(ra);
   |                  -- borrow later used here

error[E0506]: cannot assign to `u.a` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:43:13
   |
LL |             let ra = &u.a;
   |                      ---- borrow of `u.a` occurs here
LL |             u.a = 1; //[ast]~ ERROR cannot assign to `u.a` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.a` occurs here
LL |                      //[mir]~^ ERROR cannot assign to `u.a` because it is borrowed
LL |             drop(ra);
   |                  -- borrow later used here

error[E0502]: cannot borrow `u.b` as mutable because it is also borrowed as immutable
  --> $DIR/borrowck-union-borrow.rs:60:23
   |
LL |             let ra = &u.a;
   |                      ---- immutable borrow occurs here
LL |             let rmb = &mut u.b; //[ast]~ ERROR cannot borrow `u` (via `u.b`) as mutable because `u` is also borrowed as immutable (via `u.a`)
   |                       ^^^^^^^^ mutable borrow occurs here
LL |                                 //[mir]~^ ERROR cannot borrow `u.b` as mutable because it is also borrowed as immutable
LL |             drop(ra);
   |                  -- borrow later used here

error[E0506]: cannot assign to `u.b` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:66:13
   |
LL |             let ra = &u.a;
   |                      ---- borrow of `u.b` occurs here
LL |             u.b = 1; //[ast]~ ERROR cannot assign to `u.b` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.b` occurs here
LL |                      //[mir]~^ ERROR cannot assign to `u.b` because it is borrowed
LL |             drop(ra);
   |                  -- borrow later used here

error[E0502]: cannot borrow `u.a` as immutable because it is also borrowed as mutable
  --> $DIR/borrowck-union-borrow.rs:73:22
   |
LL |             let rma = &mut u.a;
   |                       -------- mutable borrow occurs here
LL |             let ra = &u.a; //[ast]~ ERROR cannot borrow `u.a` as immutable because it is also borrowed as mutable
   |                      ^^^^ immutable borrow occurs here
LL |                          //[mir]~^ ERROR cannot borrow `u.a` as immutable because it is also borrowed as mutable
LL |             drop(rma);
   |                  --- borrow later used here

error[E0503]: cannot use `u.a` because it was mutably borrowed
  --> $DIR/borrowck-union-borrow.rs:79:21
   |
LL |             let ra = &mut u.a;
   |                      -------- borrow of `u.a` occurs here
LL |             let a = u.a; //[ast]~ ERROR cannot use `u.a` because it was mutably borrowed
   |                     ^^^ use of borrowed `u.a`
LL |                          //[mir]~^ ERROR cannot use `u.a` because it was mutably borrowed
LL |             drop(ra);
   |                  -- borrow later used here

error[E0499]: cannot borrow `u.a` as mutable more than once at a time
  --> $DIR/borrowck-union-borrow.rs:85:24
   |
LL |             let rma = &mut u.a;
   |                       -------- first mutable borrow occurs here
LL |             let rma2 = &mut u.a; //[ast]~ ERROR cannot borrow `u.a` as mutable more than once at a time
   |                        ^^^^^^^^ second mutable borrow occurs here
LL |                                  //[mir]~^ ERROR cannot borrow `u.a` as mutable more than once at a time
LL |             drop(rma);
   |                  --- borrow later used here

error[E0506]: cannot assign to `u.a` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:91:13
   |
LL |             let rma = &mut u.a;
   |                       -------- borrow of `u.a` occurs here
LL |             u.a = 1; //[ast]~ ERROR cannot assign to `u.a` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.a` occurs here
LL |                      //[mir]~^ ERROR cannot assign to `u.a` because it is borrowed
LL |             drop(rma);
   |                  --- borrow later used here

error[E0502]: cannot borrow `u.b` as immutable because it is also borrowed as mutable
  --> $DIR/borrowck-union-borrow.rs:98:22
   |
LL |             let rma = &mut u.a;
   |                       -------- mutable borrow occurs here
LL |             let rb = &u.b; //[ast]~ ERROR cannot borrow `u` (via `u.b`) as immutable because `u` is also borrowed as mutable (via `u.a`)
   |                      ^^^^ immutable borrow occurs here
LL |                            //[mir]~^ ERROR cannot borrow `u.b` as immutable because it is also borrowed as mutable
LL |             drop(rma);
   |                  --- borrow later used here

error[E0503]: cannot use `u.b` because it was mutably borrowed
  --> $DIR/borrowck-union-borrow.rs:104:21
   |
LL |             let ra = &mut u.a;
   |                      -------- borrow of `u.a` occurs here
LL |             let b = u.b; //[ast]~ ERROR cannot use `u.b` because it was mutably borrowed
   |                     ^^^ use of borrowed `u.a`
...
LL |             drop(ra);
   |                  -- borrow later used here

error[E0499]: cannot borrow `u.b` as mutable more than once at a time
  --> $DIR/borrowck-union-borrow.rs:111:24
   |
LL |             let rma = &mut u.a;
   |                       -------- first mutable borrow occurs here
LL |             let rmb2 = &mut u.b; //[ast]~ ERROR cannot borrow `u` (via `u.b`) as mutable more than once at a time
   |                        ^^^^^^^^ second mutable borrow occurs here
LL |                                  //[mir]~^ ERROR cannot borrow `u.b` as mutable more than once at a time
LL |             drop(rma);
   |                  --- borrow later used here

error[E0506]: cannot assign to `u.b` because it is borrowed
  --> $DIR/borrowck-union-borrow.rs:117:13
   |
LL |             let rma = &mut u.a;
   |                       -------- borrow of `u.b` occurs here
LL |             u.b = 1; //[ast]~ ERROR cannot assign to `u.b` because it is borrowed
   |             ^^^^^^^ assignment to borrowed `u.b` occurs here
LL |                      //[mir]~^ ERROR cannot assign to `u.b` because it is borrowed
LL |             drop(rma);
   |                  --- borrow later used 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`.