4 files changed, 2 insertions, 4 deletions
diff --git a/src/libstd/sync/barrier.rs b/src/libstd/sync/barrier.rs
index 581e540d3b6..cca376f7b6d 100644
--- a/src/libstd/sync/barrier.rs
+++ b/src/libstd/sync/barrier.rs
@@ -46,7 +46,6 @@ struct BarrierState {
 ///
 /// Currently this opaque structure only has one method, `.is_leader()`. Only
 /// one thread will receive a result that will return `true` from this function.
-#[allow(missing_copy_implementations)]
 pub struct BarrierWaitResult(bool);
 
 impl Barrier {
diff --git a/src/libstd/sync/mpsc/mod.rs b/src/libstd/sync/mpsc/mod.rs
index 39c57a21d75..2e60d684d68 100644
--- a/src/libstd/sync/mpsc/mod.rs
+++ b/src/libstd/sync/mpsc/mod.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Multi-producer, single-consumer communication primitives threads
+//! Multi-producer, single-consumer FIFO queue communication primitives.
 //!
 //! This module provides message-based communication over channels, concretely
 //! defined among three types:
diff --git a/src/libstd/sync/mpsc/oneshot.rs b/src/libstd/sync/mpsc/oneshot.rs
index ca667e65e30..eb45681fa62 100644
--- a/src/libstd/sync/mpsc/oneshot.rs
+++ b/src/libstd/sync/mpsc/oneshot.rs
@@ -45,7 +45,7 @@ use core::mem;
 use sync::atomic::{AtomicUsize, Ordering};
 
 // Various states you can find a port in.
-const EMPTY: uint = 0;          // initial state: no data, no blocked reciever
+const EMPTY: uint = 0;          // initial state: no data, no blocked receiver
 const DATA: uint = 1;           // data ready for receiver to take
 const DISCONNECTED: uint = 2;   // channel is disconnected OR upgraded
 // Any other value represents a pointer to a SignalToken value. The
diff --git a/src/libstd/sync/poison.rs b/src/libstd/sync/poison.rs
index 18680b96592..d9bc37d312e 100644
--- a/src/libstd/sync/poison.rs
+++ b/src/libstd/sync/poison.rs
@@ -42,7 +42,6 @@ impl Flag {
     }
 }
 
-#[allow(missing_copy_implementations)]
 pub struct Guard {
     panicking: bool,
 }