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`.