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`.