fn main() {
    unsafe {
        let m = &mut () as *mut ();
        m.offset(0);
        m.wrapping_add(0);
        m.sub(0);
        m.wrapping_sub(0);

        let c = &() as *const ();
        c.offset(0);
        c.wrapping_add(0);
        c.sub(0);
        c.wrapping_sub(0);

        let sized = &1 as *const i32;
        sized.offset(0);
    }
}

fn main() {
    unsafe {
        let m = &mut () as *mut ();
        m.offset(0);
        m.wrapping_add(0);
        m.sub(0);
        m.wrapping_sub(0);

        let c = &() as *const ();
        c.offset(0);
        c.wrapping_add(0);
        c.sub(0);
        c.wrapping_sub(0);

        let y = &1 as *const i32;
        y.offset(0);
    }
}

--- 
+++ 
@@ -12,7 +12,7 @@
         c.sub(0);
         c.wrapping_sub(0);
 
-        let y = &1 as *const i32;
-        y.offset(0);
+        let sized = &1 as *const i32;
+        sized.offset(0);
     }
 }
Update var name in test
