error[E0389]: cannot assign to data in a `&` reference
  --> $DIR/borrowck-borrow-mut-base-ptr-in-aliasable-loc.rs:9:5
   |
LL |     **t1 = 22;
   |     ^^^^^^^^^ assignment into an immutable reference

error[E0502]: cannot borrow `**t0` as immutable because `*t0` is also borrowed as mutable
  --> $DIR/borrowck-borrow-mut-base-ptr-in-aliasable-loc.rs:14:22
   |
LL |     let t1 = &mut *t0;
   |                   --- mutable borrow occurs here
LL |     let p: &isize = &**t0;
   |                      ^^^^ immutable borrow occurs here
LL |     **t1 = 22;
LL | }
   | - mutable borrow ends here

error[E0389]: cannot borrow data mutably in a `&` reference
  --> $DIR/borrowck-borrow-mut-base-ptr-in-aliasable-loc.rs:19:31
   |
LL | fn foo4(t0: & &mut isize) {
   |             ------------ use `&mut &mut isize` here to make mutable
LL |     let x:  &mut isize = &mut **t0;
   |                               ^^^^ assignment into an immutable reference

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0389, E0502.
For more information about an error, try `rustc --explain E0389`.