added comment

src/main.rs

@@ -75,7 +75,7 @@ mod u1 {
         pub const fn new() -> Self {
             State {
                 data: 11,
-                s: &unsafe { Sec::new(1) },
+                s: &unsafe { Sec::new(1) }, // this would not even be possible
             }
         }
         pub fn user1(&mut self, sec: &Sec) {