2 files changed, 8 insertions, 7 deletions
diff --git a/src/libcore/atomics.rs b/src/libcore/atomics.rs
index 9edce3bd675..65ba11f89ad 100644
--- a/src/libcore/atomics.rs
+++ b/src/libcore/atomics.rs
@@ -121,16 +121,14 @@ impl AtomicBool {
     ///
     /// # Examples
     ///
-    /// ```ignore
-    /// # // FIXME: Needs PR #12430
-    /// extern crate sync;
-    ///
-    /// use sync::Arc;
+    /// ```rust
+    /// use std::sync::Arc;
     /// use std::sync::atomics::{AtomicBool, SeqCst};
+    /// use std::task::deschedule;
     ///
     /// fn main() {
     ///     let spinlock = Arc::new(AtomicBool::new(false));
-    ///     let spinlock_clone = spin_lock.clone();
+    ///     let spinlock_clone = spinlock.clone();
     ///
     ///     spawn(proc() {
     ///         with_lock(&spinlock, || println!("task 1 in lock"));
@@ -155,7 +153,7 @@ impl AtomicBool {
     ///     f();
     ///
     ///     // Release the lock
-    ///     spinlock.store(false);
+    ///     spinlock.store(false, SeqCst);
     /// }
     /// ```
     #[inline]
diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
index 7942a1569ed..a62bc10d8ab 100644
--- a/src/libcore/macros.rs
+++ b/src/libcore/macros.rs
@@ -131,3 +131,6 @@ macro_rules! write(
         format_args_method!($dst, write_fmt, $($arg)*)
     })
 )
+
+#[macro_export]
+macro_rules! unreachable( () => (fail!("unreachable code")) )