error[E0605]: non-primitive cast: `*const isize` as `&isize` --> $DIR/issue-2995.rs:2:22 | LL | let _q: &isize = p as &isize; | ^^^^^^^^^^^ invalid cast | help: consider borrowing the value | LL - let _q: &isize = p as &isize; LL + let _q: &isize = &*p; | error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0605`.