error[E0596]: cannot borrow `*x` as mutable, as it is behind a `&` reference --> $DIR/borrow-raw-address-of-deref-mutability.rs:8:13 | LL | let x = &0; | -- help: consider changing this to be a mutable reference: `&mut 0` LL | LL | let q = &raw mut *x; | ^^^^^^^^^^^ `x` is a `&` reference, so the data it refers to cannot be borrowed as mutable error[E0596]: cannot borrow `*x` as mutable, as it is behind a `*const` pointer --> $DIR/borrow-raw-address-of-deref-mutability.rs:14:13 | LL | let x = &0 as *const i32; | -- help: consider changing this to be a mutable pointer: `&mut 0` LL | LL | let q = &raw mut *x; | ^^^^^^^^^^^ `x` is a `*const` pointer, so the data it refers to cannot be borrowed as mutable error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0596`.