From b7b5df13aa7843f42fe01c31fa8758727646dbd8 Mon Sep 17 00:00:00 2001
From: nasa <htilcs1115@gmail.com>
Date: Sat, 26 Oct 2019 01:42:39 +0900
Subject: [PATCH] Update src/stream/stream/flatten.rs

Co-Authored-By: Taiki Endo <te316e89@gmail.com>
---
 src/stream/stream/flatten.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/stream/stream/flatten.rs b/src/stream/stream/flatten.rs
index fc3592ee..56277330 100644
--- a/src/stream/stream/flatten.rs
+++ b/src/stream/stream/flatten.rs
@@ -108,7 +108,7 @@ where
     fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
         let mut this = self.project();
         loop {
-            if let Some(inner) = this.frontiter {
+            if let Some(inner) = this.frontiter.as_mut().as_pin_mut() {
                 if let item @ Some(_) = futures_core::ready!(Pin::new(inner).poll_next(cx)) {
                     return Poll::Ready(item);
                 }