silence warning

Author: Keruspe

src/lib.rs

@@ -41,9 +41,11 @@ impl<S> StreamWrapper<S> {
     /// wrapper must be pinned in memory.
     unsafe fn parts(&mut self) -> (Pin<&mut S>, &mut Context<'_>) {
         debug_assert_ne!(self.context, 0);
-        let stream = Pin::new_unchecked(&mut self.stream);
-        let context = &mut *(self.context as *mut _);
-        (stream, context)
+        unsafe {
+            let stream = Pin::new_unchecked(&mut self.stream);
+            let context = &mut *(self.context as *mut _);
+            (stream, context)
+        }
     }
 }