Update crate documentation

Hopefully this clarifies things

1 files changed, 1 insertions, 4 deletions

diff --git a/tests/ui/no_uaf_2.rs b/tests/ui/no_uaf_2.rs
index 49694b2..53e3ad8 100644
--- a/tests/ui/no_uaf_2.rs
+++ b/tests/ui/no_uaf_2.rs
@@ -1,9 +1,6 @@
 // by steffahn
 
-#![feature(pin_macro)]
-
 use std::cell::Cell;
-use std::pin::pin;
 
 use selfref::opaque;
 use selfref::Holder;
@@ -25,7 +22,7 @@ fn main() {
         Holder::<'_, MyStructKey>::new_with(|builder| builder.build(MyStruct {
             cell: Default::default(),
         }));
-    let s = pin!(s);
+    let s = Box::pin(s);
     s.as_ref().operate_in(|r| {
         r.cell.set(&String::from("hello world")); // temporary dropped at end of this statement
         println!("{}", r.cell.get()) // accesses dropped `String` data