error: expected `mut` or `const` keyword in raw pointer type --> $DIR/double-pointer.rs:4:15 | LL | let dptr: **const i32 = &ptr; | ^ | help: add `mut` or `const` here | LL | let dptr: *mut *const i32 = &ptr; | +++ LL | let dptr: *const *const i32 = &ptr; | +++++ error: aborting due to 1 previous error