error[E0499]: cannot borrow `*x` as mutable more than once at a time
  --> $DIR/coerce-overloaded-autoderef-fail.rs:9:24
   |
LL |     let y = borrow_mut(x);
   |                        - first mutable borrow occurs here
LL |     let z = borrow_mut(x);
   |                        ^ second mutable borrow occurs here
LL |
LL |     drop((y, z));
   |           - first borrow later used here

error[E0506]: cannot assign to `**x` because it is borrowed
  --> $DIR/coerce-overloaded-autoderef-fail.rs:17:5
   |
LL |     let y = borrow(x);
   |                    - borrow of `**x` occurs here
LL |     let z = borrow(x);
LL |     **x += 1;
   |     ^^^^^^^^ assignment to borrowed `**x` occurs here
LL |
LL |     drop((y, z));
   |           - borrow later used here

error[E0499]: cannot borrow `*x` as mutable more than once at a time
  --> $DIR/coerce-overloaded-autoderef-fail.rs:23:20
   |
LL |     borrow_mut2(x, x);
   |     ----------- -  ^ second mutable borrow occurs here
   |     |           |
   |     |           first mutable borrow occurs here
   |     first borrow later used by call

error[E0502]: cannot borrow `*x` as mutable because it is also borrowed as immutable
  --> $DIR/coerce-overloaded-autoderef-fail.rs:28:5
   |
LL |     borrow2(x, x);
   |     -------^^^^-^
   |     |          |
   |     |          immutable borrow occurs here
   |     mutable borrow occurs here
   |     immutable borrow later used by call

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0499, E0502, E0506.
For more information about an error, try `rustc --explain E0499`.