From 9f0daad5acafdd35c1577856e01021293d10849c Mon Sep 17 00:00:00 2001
From: Philip Kannegaard Hayes <philiphayes9@gmail.com>
Date: Sat, 17 Aug 2019 21:30:31 -0700
Subject: [PATCH] sync: fix fuzz_oneshot test by using instrumented
 `loom::sync::Arc` (#1464)

Since `tokio_sync::oneshot` makes a `CausalCell::with_mut()` mutable
access in the `Inner::drop()`, we must use the instrumented
`loom::sync::Arc`.

Uncovered by carllerche/loom#42
---
 tokio-sync/src/oneshot.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tokio-sync/src/oneshot.rs b/tokio-sync/src/oneshot.rs
index 50176b3d8..dbb766d1c 100644
--- a/tokio-sync/src/oneshot.rs
+++ b/tokio-sync/src/oneshot.rs
@@ -1,6 +1,6 @@
 //! A channel for sending a single message between asynchronous tasks.
 
-use crate::loom::{sync::atomic::AtomicUsize, sync::CausalCell};
+use crate::loom::sync::{atomic::AtomicUsize, Arc, CausalCell};
 
 use futures_core::ready;
 use std::fmt;
@@ -8,7 +8,6 @@ use std::future::Future;
 use std::mem::MaybeUninit;
 use std::pin::Pin;
 use std::sync::atomic::Ordering::{self, AcqRel, Acquire};
-use std::sync::Arc;
 use std::task::Poll::{Pending, Ready};
 use std::task::{Context, Poll, Waker};