error[E0502]: cannot borrow `t0` as mutable because it is also borrowed as immutable
  --> $DIR/borrowck-mut-borrow-of-mut-base-ptr.rs:11:18
   |
LL |     let p: &isize = &*t0;     // Freezes `*t0`
   |                     ---- immutable borrow occurs here
LL |     let mut t2 = &mut t0;
   |                  ^^^^^^^ mutable borrow occurs here
LL |     **t2 += 1;              // Mutates `*t0`
LL |     p.use_ref();
   |     - immutable borrow later used here

error[E0499]: cannot borrow `t0` as mutable more than once at a time
  --> $DIR/borrowck-mut-borrow-of-mut-base-ptr.rs:19:18
   |
LL |     let p: &mut isize = &mut *t0; // Claims `*t0`
   |                         -------- first mutable borrow occurs here
LL |     let mut t2 = &mut t0;
   |                  ^^^^^^^ second mutable borrow occurs here
LL |     **t2 += 1;                  // Mutates `*t0` but not through `*p`
LL |     p.use_mut();
   |     - first borrow later used here

error: aborting due to 2 previous errors

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