Set to None only if necessary (#2683)

rust-lang · Jan 30, 2023 · 417435e · 417435e
1 parent 2e8178c
commit 417435e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/futures-util/src/stream/stream/chain.rs b/futures-util/src/stream/stream/chain.rs
@@ -50,8 +50,9 @@ where
             if let Some(item) = ready!(first.poll_next(cx)) {
                 return Poll::Ready(Some(item));
             }
+
+            this.first.set(None);
         }
-        this.first.set(None);
         this.second.poll_next(cx)
     }