Allow deprecated mem::uninitialized

Author: taiki-e

crossbeam-epoch/src/deferred.rs

@@ -36,6 +36,9 @@ impl Deferred {
 
         unsafe {
             if size <= mem::size_of::<Data>() && align <= mem::align_of::<Data>() {
+                // TODO(taiki-e): when the minimum supported Rust version is bumped to 1.36+,
+                // replace this with `mem::MaybeUninit`.
+                #[allow(deprecated)]
                 let mut data: Data = mem::uninitialized();
                 ptr::write(&mut data as *mut Data as *mut F, f);
 
@@ -51,6 +54,9 @@ impl Deferred {
                 }
             } else {
                 let b: Box<F> = Box::new(f);
+                // TODO(taiki-e): when the minimum supported Rust version is bumped to 1.36+,
+                // replace this with `mem::MaybeUninit`.
+                #[allow(deprecated)]
                 let mut data: Data = mem::uninitialized();
                 ptr::write(&mut data as *mut Data as *mut Box<F>, b);
 

crossbeam-epoch/src/sync/queue.rs

@@ -46,6 +46,9 @@ impl<T> Queue<T> {
             head: CachePadded::new(Atomic::null()),
             tail: CachePadded::new(Atomic::null()),
         };
+        // TODO(taiki-e): when the minimum supported Rust version is bumped to 1.36+,
+        // replace this with `mem::MaybeUninit`.
+        #[allow(deprecated)]
         let sentinel = Owned::new(Node {
             data: unsafe { mem::uninitialized() },
             next: Atomic::null(),