io: fix take pointer check (#4437)

tokio-rs · Jan 30, 2022 · 27870cd · 27870cd
1 parent cafdcfc
commit 27870cd
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/tokio/src/io/util/take.rs b/tokio/src/io/util/take.rs
@@ -84,11 +84,10 @@ impl<R: AsyncRead> AsyncRead for Take<R> {
             return Poll::Ready(Ok(()));
         }
 
-        let buf_ptr = buf.filled().as_ptr();
-
         let me = self.project();
         let mut b = buf.take(*me.limit_ as usize);
 
+        let buf_ptr = b.filled().as_ptr();
         ready!(me.inner.poll_read(cx, &mut b))?;
         assert_eq!(b.filled().as_ptr(), buf_ptr);