From 4290d68c935bc169c5234deab710f7a50f20a103 Mon Sep 17 00:00:00 2001
From: Mikail Bagishov <bagishov.mikail@yandex.ru>
Date: Tue, 18 Aug 2020 11:55:55 +0300
Subject: [PATCH] fix coop-related bug

---
 tokio/src/sync/mpsc/chan.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tokio/src/sync/mpsc/chan.rs b/tokio/src/sync/mpsc/chan.rs
index e4f89b908f9..5eddbd3ad92 100644
--- a/tokio/src/sync/mpsc/chan.rs
+++ b/tokio/src/sync/mpsc/chan.rs
@@ -370,7 +370,7 @@ impl Semaphore for (crate::sync::batch_semaphore::Semaphore, usize) {
         let waker = crate::util::waker_ref(&waker);
         let mut noop_cx = std::task::Context::from_waker(&*waker);
         let mut permit = Permit::new();
-        match self.poll_acquire(&mut noop_cx, &mut permit) {
+        match permit.poll_acquire(&mut noop_cx, 1, &self.0) {
             Poll::Ready(Err(_)) => true,
             Poll::Ready(Ok(())) => {
                 permit.release(1, &self.0);