``` rust fn main() { let x = 0; let p = &x as *const i32; println!("{:?}, {:x}", p, p as usize); } ``` This sample code prints `0x5a83172c, 7fff5a83172c`, where the pointer's debug doesn't include the first 4 characters of its address. My rustc version: ``` $ rustc --version --verbose rustc 1.0.0-nightly (4db0b3246 2015-02-25) (built 2015-02-25) binary: rustc commit-hash: 4db0b32467535d718d6474de7ae8d1007d900818 commit-date: 2015-02-25 build-date: 2015-02-25 host: x86_64-apple-darwin release: 1.0.0-nightly ```