1 #![warn(clippy::cmp_null)] 2 #![allow(unused_mut)] 3 4 use std::ptr; 5 main()6fn main() { 7 let x = 0; 8 let p: *const usize = &x; 9 if p == ptr::null() { 10 println!("This is surprising!"); 11 } 12 let mut y = 0; 13 let mut m: *mut usize = &mut y; 14 if m == ptr::null_mut() { 15 println!("This is surprising, too!"); 16 } 17 } 18