Relax `Arc` bounds don't require Sync+Send

Besides the above making sense, it'll also allow us to make `RacyCell`
private and use UnsafeCell instead.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/thread_local/scoped.rs b/src/libstd/thread_local/scoped.rs
index 3ea051b16f2..756c86c2115 100644
--- a/src/libstd/thread_local/scoped.rs
+++ b/src/libstd/thread_local/scoped.rs
@@ -196,10 +196,10 @@ impl<T> Key<T> {
 
 #[cfg(not(any(windows, target_os = "android", target_os = "ios")))]
 mod imp {
-    use std::comm::RacyCell;
+    use std::cell::UnsafeCell;
 
     #[doc(hidden)]
-    pub struct KeyInner<T> { pub inner: RacyCell<*mut T> }
+    pub struct KeyInner<T> { pub inner: UnsafeCell<*mut T> }
 
     unsafe impl<T> ::kinds::Sync for KeyInner<T> { }