markers -> marker

154 files changed, 332 insertions, 332 deletions

diff --git a/src/liballoc/arc.rs b/src/liballoc/arc.rs
index a3b77ccb6db..841882b4719 100644
--- a/src/liballoc/arc.rs
+++ b/src/liballoc/arc.rs
@@ -74,7 +74,7 @@ use core::clone::Clone;
 use core::fmt::{self, Show};
 use core::cmp::{Eq, Ord, PartialEq, PartialOrd, Ordering};
 use core::default::Default;
-use core::markers::{Sync, Send};
+use core::marker::{Sync, Send};
 use core::mem::{min_align_of, size_of, drop};
 use core::mem;
 use core::nonzero::NonZero;
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 0b211c7c212..a7f76c02bd8 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -18,7 +18,7 @@ use core::cmp::{PartialEq, PartialOrd, Eq, Ord, Ordering};
 use core::default::Default;
 use core::fmt;
 use core::hash::{self, Hash};
-use core::markers::Sized;
+use core::marker::Sized;
 use core::mem;
 use core::option::Option;
 use core::ptr::Unique;
diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index c6eaaaeecca..69a0d596644 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -148,7 +148,7 @@ use core::cmp::{PartialEq, PartialOrd, Eq, Ord, Ordering};
 use core::default::Default;
 use core::fmt;
 use core::hash::{self, Hash};
-use core::markers;
+use core::marker;
 use core::mem::{transmute, min_align_of, size_of, forget};
 use core::nonzero::NonZero;
 use core::ops::{Deref, Drop};
@@ -175,8 +175,8 @@ pub struct Rc<T> {
     // FIXME #12808: strange names to try to avoid interfering with field accesses of the contained
     // type via Deref
     _ptr: NonZero<*mut RcBox<T>>,
-    _nosend: markers::NoSend,
-    _noshare: markers::NoSync
+    _nosend: marker::NoSend,
+    _noshare: marker::NoSync
 }
 
 impl<T> Rc<T> {
@@ -201,8 +201,8 @@ impl<T> Rc<T> {
                     strong: Cell::new(1),
                     weak: Cell::new(1)
                 })),
-                _nosend: markers::NoSend,
-                _noshare: markers::NoSync
+                _nosend: marker::NoSend,
+                _noshare: marker::NoSync
             }
         }
     }
@@ -223,8 +223,8 @@ impl<T> Rc<T> {
         self.inc_weak();
         Weak {
             _ptr: self._ptr,
-            _nosend: markers::NoSend,
-            _noshare: markers::NoSync
+            _nosend: marker::NoSend,
+            _noshare: marker::NoSync
         }
     }
 }
@@ -431,7 +431,7 @@ impl<T> Clone for Rc<T> {
     #[inline]
     fn clone(&self) -> Rc<T> {
         self.inc_strong();
-        Rc { _ptr: self._ptr, _nosend: markers::NoSend, _noshare: markers::NoSync }
+        Rc { _ptr: self._ptr, _nosend: marker::NoSend, _noshare: marker::NoSync }
     }
 }
 
@@ -622,8 +622,8 @@ pub struct Weak<T> {
     // FIXME #12808: strange names to try to avoid interfering with
     // field accesses of the contained type via Deref
     _ptr: NonZero<*mut RcBox<T>>,
-    _nosend: markers::NoSend,
-    _noshare: markers::NoSync
+    _nosend: marker::NoSend,
+    _noshare: marker::NoSync
 }
 
 #[experimental = "Weak pointers may not belong in this module."]
@@ -650,7 +650,7 @@ impl<T> Weak<T> {
             None
         } else {
             self.inc_strong();
-            Some(Rc { _ptr: self._ptr, _nosend: markers::NoSend, _noshare: markers::NoSync })
+            Some(Rc { _ptr: self._ptr, _nosend: marker::NoSend, _noshare: marker::NoSync })
         }
     }
 }
@@ -717,7 +717,7 @@ impl<T> Clone for Weak<T> {
     #[inline]
     fn clone(&self) -> Weak<T> {
         self.inc_weak();
-        Weak { _ptr: self._ptr, _nosend: markers::NoSend, _noshare: markers::NoSync }
+        Weak { _ptr: self._ptr, _nosend: marker::NoSend, _noshare: marker::NoSync }
     }
 }
 
diff --git a/src/libcollections/btree/map.rs b/src/libcollections/btree/map.rs
index 73cc46091e9..66c28375d7a 100644
--- a/src/libcollections/btree/map.rs
+++ b/src/libcollections/btree/map.rs
@@ -480,7 +480,7 @@ enum Continuation<A, B> {
 /// boilerplate gets cut out.
 mod stack {
     use core::prelude::*;
-    use core::markers;
+    use core::marker;
     use core::mem;
     use core::ops::{Deref, DerefMut};
     use super::BTreeMap;
@@ -494,7 +494,7 @@ mod stack {
     /// where `&'static` can be used in any function expecting any lifetime reference.
     pub struct IdRef<'id, T: 'id> {
         inner: &'id mut T,
-        marker: markers::InvariantLifetime<'id>
+        marker: marker::InvariantLifetime<'id>
     }
 
     impl<'id, T> Deref for IdRef<'id, T> {
@@ -536,7 +536,7 @@ mod stack {
     pub struct Pusher<'id, 'a, K:'a, V:'a> {
         map: &'a mut BTreeMap<K, V>,
         stack: Stack<K, V>,
-        marker: markers::InvariantLifetime<'id>
+        marker: marker::InvariantLifetime<'id>
     }
 
     impl<'a, K, V> PartialSearchStack<'a, K, V> {
@@ -571,11 +571,11 @@ mod stack {
             let pusher = Pusher {
                 map: self.map,
                 stack: self.stack,
-                marker: markers::InvariantLifetime
+                marker: marker::InvariantLifetime
             };
             let node = IdRef {
                 inner: unsafe { &mut *self.next },
-                marker: markers::InvariantLifetime
+                marker: marker::InvariantLifetime
             };
 
             closure(pusher, node)
diff --git a/src/libcollections/lib.rs b/src/libcollections/lib.rs
index cbe5d2404e7..5463d135c08 100644
--- a/src/libcollections/lib.rs
+++ b/src/libcollections/lib.rs
@@ -124,8 +124,8 @@ mod std {
     pub use core::clone;    // deriving(Clone)
     pub use core::cmp;      // deriving(Eq, Ord, etc.)
     #[cfg(stage0)]
-    pub use core::markers as kinds;
-    pub use core::markers;  // deriving(Copy)
+    pub use core::marker as kinds;
+    pub use core::marker;  // deriving(Copy)
     pub use core::hash;     // deriving(Hash)
 }
 
@@ -140,7 +140,7 @@ mod prelude {
     pub use core::iter::{FromIterator, Extend, IteratorExt};
     pub use core::iter::{Iterator, DoubleEndedIterator, RandomAccessIterator};
     pub use core::iter::{ExactSizeIterator};
-    pub use core::markers::{Copy, Send, Sized, Sync};
+    pub use core::marker::{Copy, Send, Sized, Sync};
     pub use core::mem::drop;
     pub use core::ops::{Drop, Fn, FnMut, FnOnce};
     pub use core::option::Option;
diff --git a/src/libcollections/ring_buf.rs b/src/libcollections/ring_buf.rs
index 3c1cd101e3b..38993520da1 100644
--- a/src/libcollections/ring_buf.rs
+++ b/src/libcollections/ring_buf.rs
@@ -20,7 +20,7 @@ use core::cmp::Ordering;
 use core::default::Default;
 use core::fmt;
 use core::iter::{self, repeat, FromIterator, RandomAccessIterator};
-use core::markers;
+use core::marker;
 use core::mem;
 use core::num::{Int, UnsignedInt};
 use core::ops::{Index, IndexMut};
@@ -534,7 +534,7 @@ impl<T> RingBuf<T> {
             head: self.head,
             cap: self.cap,
             ptr: self.ptr,
-            marker: markers::ContravariantLifetime::<'a>,
+            marker: marker::ContravariantLifetime::<'a>,
         }
     }
 
@@ -1414,7 +1414,7 @@ pub struct IterMut<'a, T:'a> {
     tail: uint,
     head: uint,
     cap: uint,
-    marker: markers::ContravariantLifetime<'a>,
+    marker: marker::ContravariantLifetime<'a>,
 }
 
 #[stable]
diff --git a/src/libcollections/slice.rs b/src/libcollections/slice.rs
index d7e0b3d9353..6acb75387fd 100644
--- a/src/libcollections/slice.rs
+++ b/src/libcollections/slice.rs
@@ -95,7 +95,7 @@ use core::cmp::Ordering::{self, Greater, Less};
 use core::cmp::{self, Ord, PartialEq};
 use core::iter::{Iterator, IteratorExt};
 use core::iter::{range, range_step, MultiplicativeIterator};
-use core::markers::Sized;
+use core::marker::Sized;
 use core::mem::size_of;
 use core::mem;
 use core::ops::{FnMut, SliceMut};
diff --git a/src/libcollections/vec.rs b/src/libcollections/vec.rs
index b3b560a23bd..9979fe128fc 100644
--- a/src/libcollections/vec.rs
+++ b/src/libcollections/vec.rs
@@ -55,7 +55,7 @@ use core::default::Default;
 use core::fmt;
 use core::hash::{self, Hash};
 use core::iter::{repeat, FromIterator};
-use core::markers::{ContravariantLifetime, InvariantType};
+use core::marker::{ContravariantLifetime, InvariantType};
 use core::mem;
 use core::nonzero::NonZero;
 use core::num::{Int, UnsignedInt};
diff --git a/src/libcore/array.rs b/src/libcore/array.rs
index f85b17fb7f0..2013c398c55 100644
--- a/src/libcore/array.rs
+++ b/src/libcore/array.rs
@@ -17,7 +17,7 @@
 use clone::Clone;
 use cmp::{PartialEq, Eq, PartialOrd, Ord, Ordering};
 use fmt;
-use markers::Copy;
+use marker::Copy;
 use ops::Deref;
 use option::Option;
 
diff --git a/src/libcore/atomic.rs b/src/libcore/atomic.rs
index 9e5bda4bf43..aee1d825bc2 100644
--- a/src/libcore/atomic.rs
+++ b/src/libcore/atomic.rs
@@ -72,7 +72,7 @@
 
 use self::Ordering::*;
 
-use markers::Sync;
+use marker::Sync;
 
 use intrinsics;
 use cell::UnsafeCell;
diff --git a/src/libcore/borrow.rs b/src/libcore/borrow.rs
index c4adf724b2f..de9c79614b3 100644
--- a/src/libcore/borrow.rs
+++ b/src/libcore/borrow.rs
@@ -47,7 +47,7 @@
 use clone::Clone;
 use cmp::{Eq, Ord, Ordering, PartialEq, PartialOrd};
 use fmt;
-use markers::Sized;
+use marker::Sized;
 use ops::Deref;
 use option::Option;
 use self::Cow::*;
diff --git a/src/libcore/cell.rs b/src/libcore/cell.rs
index ae590b1de06..7217468c74e 100644
--- a/src/libcore/cell.rs
+++ b/src/libcore/cell.rs
@@ -161,7 +161,7 @@ use clone::Clone;
 use cmp::PartialEq;
 use default::Default;
 use fmt;
-use markers::{Copy, Send};
+use marker::{Copy, Send};
 use ops::{Deref, DerefMut, Drop};
 use option::Option;
 use option::Option::{None, Some};
@@ -520,11 +520,11 @@ impl<'b, T> DerefMut for RefMut<'b, T> {
 ///
 /// ```rust
 /// use std::cell::UnsafeCell;
-/// use std::markers;
+/// use std::marker;
 ///
 /// struct NotThreadSafe<T> {
 ///     value: UnsafeCell<T>,
-///     marker: markers::NoSync
+///     marker: marker::NoSync
 /// }
 /// ```
 ///
diff --git a/src/libcore/clone.rs b/src/libcore/clone.rs
index 78a5848f34d..3149247a83a 100644
--- a/src/libcore/clone.rs
+++ b/src/libcore/clone.rs
@@ -21,7 +21,7 @@
 
 #![stable]
 
-use markers::Sized;
+use marker::Sized;
 
 /// A common trait for cloning an object.
 #[stable]
diff --git a/src/libcore/cmp.rs b/src/libcore/cmp.rs
index 01f1073a5d3..c3dfd5f5159 100644
--- a/src/libcore/cmp.rs
+++ b/src/libcore/cmp.rs
@@ -43,7 +43,7 @@
 
 use self::Ordering::*;
 
-use markers::Sized;
+use marker::Sized;
 use option::Option::{self, Some, None};
 
 /// Trait for equality comparisons which are [partial equivalence relations](
@@ -316,7 +316,7 @@ pub fn partial_max<T: PartialOrd>(v1: T, v2: T) -> Option<T> {
 mod impls {
     use cmp::{PartialOrd, Ord, PartialEq, Eq, Ordering};
     use cmp::Ordering::{Less, Greater, Equal};
-    use markers::Sized;
+    use marker::Sized;
     use option::Option;
     use option::Option::{Some, None};
 
diff --git a/src/libcore/fmt/mod.rs b/src/libcore/fmt/mod.rs
index ed01cf64769..c7ff0f938b6 100644
--- a/src/libcore/fmt/mod.rs
+++ b/src/libcore/fmt/mod.rs
@@ -15,7 +15,7 @@
 use any;
 use cell::{Cell, Ref, RefMut};
 use iter::{Iterator, IteratorExt, range};
-use markers::{Copy, Sized};
+use marker::{Copy, Sized};
 use mem;
 use option::Option;
 use option::Option::{Some, None};
diff --git a/src/libcore/iter.rs b/src/libcore/iter.rs
index ac5804c910d..97d26b5333a 100644
--- a/src/libcore/iter.rs
+++ b/src/libcore/iter.rs
@@ -67,7 +67,7 @@ use num::{ToPrimitive, Int};
 use ops::{Add, Deref, FnMut};
 use option::Option;
 use option::Option::{Some, None};
-use std::markers::Sized;
+use std::marker::Sized;
 use uint;
 
 /// An interface for dealing with "external iterators". These types of iterators
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index c06dc056d20..98b1e8db89f 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -111,7 +111,7 @@ pub mod ptr;
 
 /* Core language traits */
 
-pub mod markers;
+pub mod marker;
 pub mod ops;
 pub mod cmp;
 pub mod clone;
@@ -151,8 +151,8 @@ mod std {
     pub use clone;
     pub use cmp;
     #[cfg(stage0)]
-    pub use markers as kinds;
-    pub use markers;
+    pub use marker as kinds;
+    pub use marker;
     pub use option;
     pub use fmt;
     pub use hash;
diff --git a/src/libcore/markers.rs b/src/libcore/marker.rs
index f218eaceee2..d400cb47cbf 100644
--- a/src/libcore/markers.rs
+++ b/src/libcore/marker.rs
@@ -87,7 +87,7 @@ pub trait Copy {
 ///
 /// Users writing their own types with interior mutability (or anything
 /// else that is not thread-safe) should use the `NoSync` marker type
-/// (from `std::markers`) to ensure that the compiler doesn't
+/// (from `std::marker`) to ensure that the compiler doesn't
 /// consider the user-defined type to be `Sync`.  Any types with
 /// interior mutability must also use the `std::cell::UnsafeCell` wrapper
 /// around the value(s) which can be mutated when behind a `&`
@@ -140,10 +140,10 @@ pub unsafe trait Sync {
 #[unstable = "likely to change with new variance strategy"]
 #[lang="covariant_type"]
 #[derive(PartialEq, Eq, PartialOrd, Ord)]
-pub struct CovariantType<Sized? T>;
+pub struct CovariantType<T: ?Sized>;
 
-impl<Sized? T> Copy for CovariantType<T> {}
-impl<Sized? T> Clone for CovariantType<T> {
+impl<T: ?Sized> Copy for CovariantType<T> {}
+impl<T: ?Sized> Clone for CovariantType<T> {
     fn clone(&self) -> CovariantType<T> { *self }
 }
 
diff --git a/src/libcore/mem.rs b/src/libcore/mem.rs
index 24cb649ce55..8438c9b206e 100644
--- a/src/libcore/mem.rs
+++ b/src/libcore/mem.rs
@@ -15,7 +15,7 @@
 
 #![stable]
 
-use markers::Sized;
+use marker::Sized;
 use intrinsics;
 use ptr;
 
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 25833741024..046406ee4d9 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -21,7 +21,7 @@ use cmp::{PartialEq, Eq};
 use cmp::{PartialOrd, Ord};
 use intrinsics;
 use iter::IteratorExt;
-use markers::Copy;
+use marker::Copy;
 use mem::size_of;
 use ops::{Add, Sub, Mul, Div, Rem, Neg};
 use ops::{Not, BitAnd, BitOr, BitXor, Shl, Shr};
@@ -992,7 +992,7 @@ impl_to_primitive_float! { f64 }
 
 /// A generic trait for converting a number to a value.
 #[experimental = "trait is likely to be removed"]
-pub trait FromPrimitive : ::markers::Sized {
+pub trait FromPrimitive : ::marker::Sized {
     /// Convert an `int` to return an optional value of this type. If the
     /// value cannot be represented by this value, the `None` is returned.
     #[inline]
diff --git a/src/libcore/ops.rs b/src/libcore/ops.rs
index 287a725a33c..239aa6058cc 100644
--- a/src/libcore/ops.rs
+++ b/src/libcore/ops.rs
@@ -63,7 +63,7 @@
 
 use clone::Clone;
 use iter::{Step, Iterator,DoubleEndedIterator,ExactSizeIterator};
-use markers::Sized;
+use marker::Sized;
 use option::Option::{self, Some, None};
 
 /// The `Drop` trait is used to run some code when a value goes out of scope. This
diff --git a/src/libcore/prelude.rs b/src/libcore/prelude.rs
index 558e451ee8c..c175b83e760 100644
--- a/src/libcore/prelude.rs
+++ b/src/libcore/prelude.rs
@@ -29,7 +29,7 @@
 //! ```
 
 // Reexported core operators
-pub use markers::{Copy, Send, Sized, Sync};
+pub use marker::{Copy, Send, Sized, Sync};
 pub use ops::{Drop, Fn, FnMut, FnOnce};
 
 // Reexported functions
diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
index 40c7d60a205..c35d948165a 100644
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@@ -92,7 +92,7 @@ use mem;
 use clone::Clone;
 use intrinsics;
 use option::Option::{self, Some, None};
-use markers::{Send, Sized, Sync};
+use marker::{Send, Sized, Sync};
 
 use cmp::{PartialEq, Eq, Ord, PartialOrd};
 use cmp::Ordering::{self, Less, Equal, Greater};
diff --git a/src/libcore/raw.rs b/src/libcore/raw.rs
index 57f1706dc43..1ad6d43f76f 100644
--- a/src/libcore/raw.rs
+++ b/src/libcore/raw.rs
@@ -18,7 +18,7 @@
 //!
 //! Their definition should always match the ABI defined in `rustc::back::abi`.
 
-use markers::Copy;
+use marker::Copy;
 use mem;
 
 /// The representation of a Rust slice
diff --git a/src/libcore/slice.rs b/src/libcore/slice.rs
index e4a15d38535..3d55d09ccf1 100644
--- a/src/libcore/slice.rs
+++ b/src/libcore/slice.rs
@@ -41,7 +41,7 @@ use cmp::Ordering::{Less, Equal, Greater};
 use cmp;
 use default::Default;
 use iter::*;
-use markers::Copy;
+use marker::Copy;
 use num::Int;
 use ops::{FnMut, self};
 use option::Option;
@@ -52,7 +52,7 @@ use ptr;
 use ptr::PtrExt;
 use mem;
 use mem::size_of;
-use markers::{Sized, self};
+use marker::{Sized, self};
 use raw::Repr;
 // Avoid conflicts with *both* the Slice trait (buggy) and the `slice::raw` module.
 use raw::Slice as RawSlice;
@@ -169,11 +169,11 @@ impl<T> SliceExt for [T] {
             if mem::size_of::<T>() == 0 {
                 Iter {ptr: p,
                       end: (p as uint + self.len()) as *const T,
-                      marker: markers::ContravariantLifetime::<'a>}
+                      marker: marker::ContravariantLifetime::<'a>}
             } else {
                 Iter {ptr: p,
                       end: p.offset(self.len() as int),
-                      marker: markers::ContravariantLifetime::<'a>}
+                      marker: marker::ContravariantLifetime::<'a>}
             }
         }
     }
@@ -322,11 +322,11 @@ impl<T> SliceExt for [T] {
             if mem::size_of::<T>() == 0 {
                 IterMut {ptr: p,
                          end: (p as uint + self.len()) as *mut T,
-                         marker: markers::ContravariantLifetime::<'a>}
+                         marker: marker::ContravariantLifetime::<'a>}
             } else {
                 IterMut {ptr: p,
                          end: p.offset(self.len() as int),
-                         marker: markers::ContravariantLifetime::<'a>}
+                         marker: marker::ContravariantLifetime::<'a>}
             }
         }
     }
@@ -734,7 +734,7 @@ macro_rules! make_slice {
 pub struct Iter<'a, T: 'a> {
     ptr: *const T,
     end: *const T,
-    marker: markers::ContravariantLifetime<'a>
+    marker: marker::ContravariantLifetime<'a>
 }
 
 #[experimental]
@@ -809,7 +809,7 @@ impl<'a, T> RandomAccessIterator for Iter<'a, T> {
 pub struct IterMut<'a, T: 'a> {
     ptr: *mut T,
     end: *mut T,
-    marker: markers::ContravariantLifetime<'a>,
+    marker: marker::ContravariantLifetime<'a>,
 }
 
 #[experimental]
diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index f1f3cabb66b..d9db50b0d5a 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -23,7 +23,7 @@ use default::Default;
 use iter::range;
 use iter::ExactSizeIterator;
 use iter::{Map, Iterator, IteratorExt, DoubleEndedIterator};
-use markers::Sized;
+use marker::Sized;
 use mem;
 use num::Int;
 use ops::{Fn, FnMut};
diff --git a/src/libcore/ty.rs b/src/libcore/ty.rs
index 9de3cf30dc9..35c1cb09281 100644
--- a/src/libcore/ty.rs
+++ b/src/libcore/ty.rs
@@ -10,4 +10,4 @@
 
 //! Types dealing with unsafe actions.
 
-use markers;
+use marker;
diff --git a/src/libcoretest/hash/mod.rs b/src/libcoretest/hash/mod.rs
index 3af38f9035d..63bf9ec3314 100644
--- a/src/libcoretest/hash/mod.rs
+++ b/src/libcoretest/hash/mod.rs
@@ -7,7 +7,7 @@
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
-use core::markers::Sized;
+use core::marker::Sized;
 use std::mem;
 
 use core::slice::SliceExt;
diff --git a/src/libcoretest/num/mod.rs b/src/libcoretest/num/mod.rs
index 57e0737e909..1e8d2d4bc61 100644
--- a/src/libcoretest/num/mod.rs
+++ b/src/libcoretest/num/mod.rs
@@ -12,7 +12,7 @@ use core::cmp::PartialEq;
 use core::fmt::Show;
 use core::num::{NumCast, cast};
 use core::ops::{Add, Sub, Mul, Div, Rem};
-use core::markers::Copy;
+use core::marker::Copy;
 
 #[cfg_attr(stage0, macro_escape)]
 #[cfg_attr(not(stage0), macro_use)]
diff --git a/src/libcoretest/option.rs b/src/libcoretest/option.rs
index 5588fbce26a..1169f910238 100644
--- a/src/libcoretest/option.rs
+++ b/src/libcoretest/option.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use core::option::*;
-use core::markers;
+use core::marker;
 use core::mem;
 use core::clone::Clone;
 
@@ -82,7 +82,7 @@ fn test_option_dance() {
 
 #[test] #[should_fail]
 fn test_option_too_much_dance() {
-    let mut y = Some(markers::NoCopy);
+    let mut y = Some(marker::NoCopy);
     let _y2 = y.take().unwrap();
     let _y3 = y.take().unwrap();
 }
diff --git a/src/liblibc/lib.rs b/src/liblibc/lib.rs
index 4255114243c..86ed8794e1a 100644
--- a/src/liblibc/lib.rs
+++ b/src/liblibc/lib.rs
@@ -5082,6 +5082,6 @@ pub fn issue_14344_workaround() {} // FIXME #14344 force linkage to happen corre
 #[cfg(not(test))]
 mod std {
     #[cfg(stage0)]
-    pub use core::markers as kinds;
-    pub use core::markers;
+    pub use core::marker as kinds;
+    pub use core::marker;
 }
diff --git a/src/librand/lib.rs b/src/librand/lib.rs
index 9e900fcb3db..95dbbf9efcf 100644
--- a/src/librand/lib.rs
+++ b/src/librand/lib.rs
@@ -517,8 +517,8 @@ mod std {
     pub use core::{option, fmt}; // panic!()
     pub use core::clone; // derive Clone
     #[cfg(stage0)]
-    pub use core::markers as kinds;
-    pub use core::markers;
+    pub use core::marker as kinds;
+    pub use core::marker;
 }
 
 #[cfg(test)]
diff --git a/src/librustc/middle/expr_use_visitor.rs b/src/librustc/middle/expr_use_visitor.rs
index 780e3da4684..3818ab45e06 100644
--- a/src/librustc/middle/expr_use_visitor.rs
+++ b/src/librustc/middle/expr_use_visitor.rs
@@ -29,7 +29,7 @@ use middle::ty::{MethodOrigin, MethodParam, MethodTypeParam};
 use middle::ty::{MethodStatic, MethodStaticUnboxedClosure};
 use util::ppaux::Repr;
 
-use std::markers;
+use std::marker;
 use syntax::{ast, ast_util};
 use syntax::ptr::P;
 use syntax::codemap::Span;
@@ -135,7 +135,7 @@ enum TrackMatchMode<T> {
     Conflicting,
 }
 
-impl<T> markers::Copy for TrackMatchMode<T> {}
+impl<T> marker::Copy for TrackMatchMode<T> {}
 
 impl<T> TrackMatchMode<T> {
     // Builds up the whole match mode for a pattern from its constituent
diff --git a/src/librustc/middle/infer/unify.rs b/src/librustc/middle/infer/unify.rs
index b73142b4051..59f53d5fb39 100644
--- a/src/librustc/middle/infer/unify.rs
+++ b/src/librustc/middle/infer/unify.rs
@@ -10,7 +10,7 @@
 
 pub use self::VarValue::*;
 
-use std::markers;
+use std::marker;
 
 use middle::ty::{expected_found, IntVarValue};
 use middle::ty::{self, Ty};
@@ -78,7 +78,7 @@ pub struct UnificationTable<K,V> {
 /// made during the snapshot may either be *committed* or *rolled back*.
 pub struct Snapshot<K> {
     // Link snapshot to the key type `K` of the table.
-    marker: markers::CovariantType<K>,
+    marker: marker::CovariantType<K>,
     snapshot: sv::Snapshot,
 }
 
@@ -108,7 +108,7 @@ impl<'tcx, V:PartialEq+Clone+Repr<'tcx>, K:UnifyKey<'tcx, V>> UnificationTable<K
     /// Starts a new snapshot. Each snapshot must be either
     /// rolled back or committed in a "LIFO" (stack) order.
     pub fn snapshot(&mut self) -> Snapshot<K> {
-        Snapshot { marker: markers::CovariantType::<K>,
+        Snapshot { marker: marker::CovariantType::<K>,
                    snapshot: self.values.start_snapshot() }
     }
 
diff --git a/src/librustc_typeck/variance.rs b/src/librustc_typeck/variance.rs
index 62c46c435bc..bf102acb8b1 100644
--- a/src/librustc_typeck/variance.rs
+++ b/src/librustc_typeck/variance.rs
@@ -402,8 +402,8 @@ impl<'a, 'tcx, 'v> Visitor<'v> for TermsContext<'a, 'tcx> {
 struct ConstraintContext<'a, 'tcx: 'a> {
     terms_cx: TermsContext<'a, 'tcx>,
 
-    // These are the def-id of the std::markers::InvariantType,
-    // std::markers::InvariantLifetime, and so on. The arrays
+    // These are the def-id of the std::marker::InvariantType,
+    // std::marker::InvariantLifetime, and so on. The arrays
     // are indexed by the `ParamKind` (type, lifetime, self). Note
     // that there are no marker types for self, so the entries for
     // self are always None.
diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index ce9857f8243..27ea2e895f6 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -21,7 +21,7 @@ use default::Default;
 use fmt::{self, Show};
 use hash::{Hash, Hasher, RandomSipHasher};
 use iter::{self, Iterator, IteratorExt, FromIterator, Extend, Map};
-use markers::Sized;
+use marker::Sized;
 use mem::{self, replace};
 use num::{Int, UnsignedInt};
 use ops::{Deref, FnMut, Index, IndexMut};
diff --git a/src/libstd/collections/hash/set.rs b/src/libstd/collections/hash/set.rs
index d67581a12b3..5c9bbf1144c 100644
--- a/src/libstd/collections/hash/set.rs
+++ b/src/libstd/collections/hash/set.rs
@@ -13,7 +13,7 @@
 use borrow::BorrowFrom;
 use clone::Clone;
 use cmp::{Eq, PartialEq};
-use core::markers::Sized;
+use core::marker::Sized;
 use default::Default;
 use fmt::Show;
 use fmt;
diff --git a/src/libstd/collections/hash/table.rs b/src/libstd/collections/hash/table.rs
index cdfde1958c6..6eb98da4da4 100644
--- a/src/libstd/collections/hash/table.rs
+++ b/src/libstd/collections/hash/table.rs
@@ -16,7 +16,7 @@ use clone::Clone;
 use cmp;
 use hash::{Hash, Hasher};
 use iter::{Iterator, count};
-use markers::{Copy, Sized, self};
+use marker::{Copy, Sized, self};
 use mem::{min_align_of, size_of};
 use mem;
 use num::{Int, UnsignedInt};
@@ -72,7 +72,7 @@ pub struct RawTable<K, V> {
     hashes:   Unique<u64>,
     // Because K/V do not appear directly in any of the types in the struct,
     // inform rustc that in fact instances of K and V are reachable from here.
-    marker:   markers::CovariantType<(K,V)>,
+    marker:   marker::CovariantType<(K,V)>,
 }
 
 struct RawBucket<K, V> {
@@ -562,7 +562,7 @@ impl<K, V> RawTable<K, V> {
                 size: 0,
                 capacity: 0,
                 hashes: Unique::null(),
-                marker: markers::CovariantType,
+                marker: marker::CovariantType,
             };
         }
         // No need for `checked_mul` before a more restrictive check performed
@@ -601,7 +601,7 @@ impl<K, V> RawTable<K, V> {
             capacity: capacity,
             size:     0,
             hashes:   Unique(hashes),
-            marker:   markers::CovariantType,
+            marker:   marker::CovariantType,
         }
     }
 
@@ -651,7 +651,7 @@ impl<K, V> RawTable<K, V> {
             hashes_end: unsafe {
                 self.hashes.0.offset(self.capacity as int)
             },
-            marker: markers::ContravariantLifetime,
+            marker: marker::ContravariantLifetime,
         }
     }
 
@@ -676,7 +676,7 @@ impl<K, V> RawTable<K, V> {
             iter: RawBuckets {
                 raw: raw,
                 hashes_end: hashes_end,
-                marker: markers::ContravariantLifetime,
+                marker: marker::ContravariantLifetime,
             },
             table: self,
         }
@@ -689,7 +689,7 @@ impl<K, V> RawTable<K, V> {
             iter: RawBuckets {
                 raw: raw,
                 hashes_end: hashes_end,
-                marker: markers::ContravariantLifetime::<'static>,
+                marker: marker::ContravariantLifetime::<'static>,
             },
             table: self,
         }
@@ -703,7 +703,7 @@ impl<K, V> RawTable<K, V> {
             raw: raw_bucket.offset(self.capacity as int),
             hashes_end: raw_bucket.hash,
             elems_left: self.size,
-            marker:     markers::ContravariantLifetime,
+            marker:     marker::ContravariantLifetime,
         }
     }
 }
@@ -713,7 +713,7 @@ impl<K, V> RawTable<K, V> {
 struct RawBuckets<'a, K, V> {
     raw: RawBucket<K, V>,
     hashes_end: *mut u64,
-    marker: markers::ContravariantLifetime<'a>,
+    marker: marker::ContravariantLifetime<'a>,
 }
 
 // FIXME(#19839) Remove in favor of `#[derive(Clone)]`
@@ -722,7 +722,7 @@ impl<'a, K, V> Clone for RawBuckets<'a, K, V> {
         RawBuckets {
             raw: self.raw,
             hashes_end: self.hashes_end,
-            marker: markers::ContravariantLifetime,
+            marker: marker::ContravariantLifetime,
         }
     }
 }
@@ -754,7 +754,7 @@ struct RevMoveBuckets<'a, K, V> {
     raw: RawBucket<K, V>,
     hashes_end: *mut u64,
     elems_left: uint,
-    marker: markers::ContravariantLifetime<'a>,
+    marker: marker::ContravariantLifetime<'a>,
 }
 
 impl<'a, K, V> Iterator for RevMoveBuckets<'a, K, V> {
diff --git a/src/libstd/hash.rs b/src/libstd/hash.rs
index 34facdc7de6..69e7e429d07 100644
--- a/src/libstd/hash.rs
+++ b/src/libstd/hash.rs
@@ -63,7 +63,7 @@
 
 pub use core::hash::{Hash, Hasher, Writer, hash, sip};
 
-use core::markers::Sized;
+use core::marker::Sized;
 use default::Default;
 use rand::Rng;
 use rand;
diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index deae56d8a30..b9c7ab15313 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -232,7 +232,7 @@ use error::{FromError, Error};
 use fmt;
 use int;
 use iter::{Iterator, IteratorExt};
-use markers::Sized;
+use marker::Sized;
 use mem::transmute;
 use ops::FnOnce;
 use option::Option;
diff --git a/src/libstd/io/stdio.rs b/src/libstd/io/stdio.rs
index 43d37543e16..ad3fb71d949 100644
--- a/src/libstd/io/stdio.rs
+++ b/src/libstd/io/stdio.rs
@@ -34,7 +34,7 @@ use failure::LOCAL_STDERR;
 use fmt;
 use io::{Reader, Writer, IoResult, IoError, OtherIoError, Buffer,
          standard_error, EndOfFile, LineBufferedWriter, BufferedReader};
-use markers::{Sync, Send};
+use marker::{Sync, Send};
 use libc;
 use mem;
 use option::Option;
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index b258c13f12e..dd4a0287ca6 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -151,7 +151,7 @@ extern crate libc;
 
 // Make std testable by not duplicating lang items. See #2912
 #[cfg(test)] extern crate "std" as realstd;
-#[cfg(test)] pub use realstd::markers;
+#[cfg(test)] pub use realstd::marker;
 #[cfg(test)] pub use realstd::ops;
 #[cfg(test)] pub use realstd::cmp;
 #[cfg(test)] pub use realstd::boxed;
@@ -168,8 +168,8 @@ pub use core::default;
 pub use core::finally;
 pub use core::intrinsics;
 pub use core::iter;
-#[cfg(stage0)] #[cfg(not(test))] pub use core::markers as kinds;
-#[cfg(not(test))] pub use core::markers;
+#[cfg(stage0)] #[cfg(not(test))] pub use core::marker as kinds;
+#[cfg(not(test))] pub use core::marker;
 pub use core::mem;
 #[cfg(not(test))] pub use core::ops;
 pub use core::ptr;
@@ -313,8 +313,8 @@ mod std {
     pub use cell; // used for tls!
     pub use thread_local; // used for thread_local!
     #[cfg(stage0)]
-    pub use markers as kinds;
-    pub use markers;  // used for tls!
+    pub use marker as kinds;
+    pub use marker;  // used for tls!
     pub use ops; // used for bitflags!
 
     // The test runner calls ::std::os::args() but really wants realstd
diff --git a/src/libstd/num/mod.rs b/src/libstd/num/mod.rs
index cd78489cb85..f433cd1e664 100644
--- a/src/libstd/num/mod.rs
+++ b/src/libstd/num/mod.rs
@@ -19,7 +19,7 @@
 #[cfg(test)] use fmt::Show;
 use ops::{Add, Sub, Mul, Div, Rem, Neg};
 
-use markers::Copy;
+use marker::Copy;
 use clone::Clone;
 use cmp::{PartialOrd, PartialEq};
 
diff --git a/src/libstd/os.rs b/src/libstd/os.rs
index 0e41d608086..2bc6d0869a5 100644
--- a/src/libstd/os.rs
+++ b/src/libstd/os.rs
@@ -37,7 +37,7 @@ use error::{FromError, Error};
 use fmt;
 use io::{IoResult, IoError};
 use iter::{Iterator, IteratorExt};
-use markers::Copy;
+use marker::Copy;
 use libc::{c_void, c_int, c_char};
 use libc;
 use boxed::Box;
diff --git a/src/libstd/path/mod.rs b/src/libstd/path/mod.rs
index e263761acd1..18b8d1d46aa 100644
--- a/src/libstd/path/mod.rs
+++ b/src/libstd/path/mod.rs
@@ -61,7 +61,7 @@
 
 #![experimental]
 
-use core::markers::Sized;
+use core::marker::Sized;
 use ffi::CString;
 use clone::Clone;
 use fmt;
diff --git a/src/libstd/path/posix.rs b/src/libstd/path/posix.rs
index 03811364d30..d8bb989e19f 100644
--- a/src/libstd/path/posix.rs
+++ b/src/libstd/path/posix.rs
@@ -16,7 +16,7 @@ use hash;
 use io::Writer;
 use iter::{AdditiveIterator, Extend};
 use iter::{Iterator, IteratorExt, Map};
-use markers::Sized;
+use marker::Sized;
 use option::Option::{self, Some, None};
 use slice::{AsSlice, Split, SliceExt, SliceConcatExt};
 use str::{self, FromStr, StrExt};
diff --git a/src/libstd/prelude/v1.rs b/src/libstd/prelude/v1.rs
index bf8d2a3d63b..1aab52edd8e 100644
--- a/src/libstd/prelude/v1.rs
+++ b/src/libstd/prelude/v1.rs
@@ -13,7 +13,7 @@
 #![stable]
 
 // Reexported core operators
-#[stable] #[doc(no_inline)] pub use markers::{Copy, Send, Sized, Sync};
+#[stable] #[doc(no_inline)] pub use marker::{Copy, Send, Sized, Sync};
 #[stable] #[doc(no_inline)] pub use ops::{Drop, Fn, FnMut, FnOnce};
 
 // Reexported functions
diff --git a/src/libstd/rand/os.rs b/src/libstd/rand/os.rs
index 512bd2a3d6e..a7d2fb169b6 100644
--- a/src/libstd/rand/os.rs
+++ b/src/libstd/rand/os.rs
@@ -185,7 +185,7 @@ mod imp {
     extern crate libc;
 
     use io::{IoResult};
-    use markers::Sync;
+    use marker::Sync;
     use mem;
     use os;
     use rand::Rng;
diff --git a/src/libstd/rt/mod.rs b/src/libstd/rt/mod.rs
index 036bb7b637b..91d9ff46b86 100644
--- a/src/libstd/rt/mod.rs
+++ b/src/libstd/rt/mod.rs
@@ -23,7 +23,7 @@
 
 #![allow(dead_code)]
 
-use markers::Send;
+use marker::Send;
 use ops::FnOnce;
 use sys;
 use thunk::Thunk;
diff --git a/src/libstd/sync/mpsc/blocking.rs b/src/libstd/sync/mpsc/blocking.rs
index af6aa803f99..f174771a3e0 100644
--- a/src/libstd/sync/mpsc/blocking.rs
+++ b/src/libstd/sync/mpsc/blocking.rs
@@ -13,8 +13,8 @@
 use thread::Thread;
 use sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
 use sync::Arc;
-use markers::{Sync, Send};
-use markers::{NoSend, NoSync};
+use marker::{Sync, Send};
+use marker::{NoSend, NoSync};
 use mem;
 use clone::Clone;
 
diff --git a/src/libstd/sync/mpsc/mod.rs b/src/libstd/sync/mpsc/mod.rs
index 4d18d9e6e9d..5dc58add665 100644
--- a/src/libstd/sync/mpsc/mod.rs
+++ b/src/libstd/sync/mpsc/mod.rs
@@ -319,7 +319,7 @@ use prelude::v1::*;
 
 use sync::Arc;
 use fmt;
-use markers;
+use marker;
 use mem;
 use cell::UnsafeCell;
 
@@ -373,7 +373,7 @@ unsafe impl<T:Send> Send for Sender<T> { }
 pub struct SyncSender<T> {
     inner: Arc<RacyCell<sync::Packet<T>>>,
     // can't share in an arc
-    _marker: markers::NoSync,
+    _marker: marker::NoSync,
 }
 
 /// An error returned from the `send` function on channels.
@@ -678,7 +678,7 @@ impl<T: Send> Drop for Sender<T> {
 
 impl<T: Send> SyncSender<T> {
     fn new(inner: Arc<RacyCell<sync::Packet<T>>>) -> SyncSender<T> {
-        SyncSender { inner: inner, _marker: markers::NoSync }
+        SyncSender { inner: inner, _marker: marker::NoSync }
     }
 
     /// Sends a value on this synchronous channel.
diff --git a/src/libstd/sync/mpsc/select.rs b/src/libstd/sync/mpsc/select.rs
index ca7120b5ead..b7bb22b3ef3 100644
--- a/src/libstd/sync/mpsc/select.rs
+++ b/src/libstd/sync/mpsc/select.rs
@@ -57,7 +57,7 @@
 use core::prelude::*;
 
 use core::cell::Cell;
-use core::markers;
+use core::marker;
 use core::mem;
 use core::uint;
 
@@ -70,7 +70,7 @@ pub struct Select {
     head: *mut Handle<'static, ()>,
     tail: *mut Handle<'static, ()>,
     next_id: Cell<uint>,
-    marker1: markers::NoSend,
+    marker1: marker::NoSend,
 }
 
 /// A handle to a receiver which is currently a member of a `Select` set of
@@ -115,7 +115,7 @@ impl Select {
     /// rather much easier through the `select!` macro.
     pub fn new() -> Select {
         Select {
-            marker1: markers::NoSend,
+            marker1: marker::NoSend,
             head: 0 as *mut Handle<'static, ()>,
             tail: 0 as *mut Handle<'static, ()>,
             next_id: Cell::new(1),
diff --git a/src/libstd/sync/mutex.rs b/src/libstd/sync/mutex.rs
index bb5a6337646..9756d086193 100644
--- a/src/libstd/sync/mutex.rs
+++ b/src/libstd/sync/mutex.rs
@@ -11,7 +11,7 @@
 use prelude::v1::*;
 
 use cell::UnsafeCell;
-use markers;
+use marker;
 use ops::{Deref, DerefMut};
 use sync::poison::{self, TryLockError, TryLockResult, LockResult};
 use sys_common::mutex as sys;
@@ -166,7 +166,7 @@ pub struct MutexGuard<'a, T: 'a> {
     __lock: &'a StaticMutex,
     __data: &'a UnsafeCell<T>,
     __poison: poison::Guard,
-    __marker: markers::NoSend,
+    __marker: marker::NoSend,
 }
 
 /// Static initialization of a mutex. This constant can be used to initialize
@@ -286,7 +286,7 @@ impl<'mutex, T> MutexGuard<'mutex, T> {
                 __lock: lock,
                 __data: data,
                 __poison: guard,
-                __marker: markers::NoSend,
+                __marker: marker::NoSend,
             }
         })
     }
diff --git a/src/libstd/sync/once.rs b/src/libstd/sync/once.rs
index 11a5cad2c25..15ca4783700 100644
--- a/src/libstd/sync/once.rs
+++ b/src/libstd/sync/once.rs
@@ -14,7 +14,7 @@
 //! example use case would be for initializing an FFI library.
 
 use int;
-use markers::Sync;
+use marker::Sync;
 use mem::drop;
 use ops::FnOnce;
 use sync::atomic::{AtomicInt, Ordering, ATOMIC_INT_INIT};
diff --git a/src/libstd/sync/rwlock.rs b/src/libstd/sync/rwlock.rs
index f40c0cc0c0e..36f9d4228b3 100644
--- a/src/libstd/sync/rwlock.rs
+++ b/src/libstd/sync/rwlock.rs
@@ -11,7 +11,7 @@
 use prelude::v1::*;
 
 use cell::UnsafeCell;
-use markers;
+use marker;
 use ops::{Deref, DerefMut};
 use sync::poison::{self, LockResult, TryLockError, TryLockResult};
 use sys_common::rwlock as sys;
@@ -113,7 +113,7 @@ pub const RW_LOCK_INIT: StaticRwLock = StaticRwLock {
 pub struct RwLockReadGuard<'a, T: 'a> {
     __lock: &'a StaticRwLock,
     __data: &'a UnsafeCell<T>,
-    __marker: markers::NoSend,
+    __marker: marker::NoSend,
 }
 
 /// RAII structure used to release the exclusive write access of a lock when
@@ -124,7 +124,7 @@ pub struct RwLockWriteGuard<'a, T: 'a> {
     __lock: &'a StaticRwLock,
     __data: &'a UnsafeCell<T>,
     __poison: poison::Guard,
-    __marker: markers::NoSend,
+    __marker: marker::NoSend,
 }
 
 impl<T: Send + Sync> RwLock<T> {
@@ -309,7 +309,7 @@ impl<'rwlock, T> RwLockReadGuard<'rwlock, T> {
             RwLockReadGuard {
                 __lock: lock,
                 __data: data,
-                __marker: markers::NoSend,
+                __marker: marker::NoSend,
             }
         })
     }
@@ -322,7 +322,7 @@ impl<'rwlock, T> RwLockWriteGuard<'rwlock, T> {
                 __lock: lock,
                 __data: data,
                 __poison: guard,
-                __marker: markers::NoSend,
+                __marker: marker::NoSend,
             }
         })
     }
diff --git a/src/libstd/sys/common/mutex.rs b/src/libstd/sys/common/mutex.rs
index b86e6ce254a..9aea0fb3b31 100644
--- a/src/libstd/sys/common/mutex.rs
+++ b/src/libstd/sys/common/mutex.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use markers::Sync;
+use marker::Sync;
 use sys::mutex as imp;
 
 /// An OS-based mutual exclusion lock.
diff --git a/src/libstd/sys/unix/c.rs b/src/libstd/sys/unix/c.rs
index 968347bbfbc..cc661877bc0 100644
--- a/src/libstd/sys/unix/c.rs
+++ b/src/libstd/sys/unix/c.rs
@@ -165,8 +165,8 @@ mod signal {
         sa_restorer: *mut libc::c_void,
     }
 
-    unsafe impl ::markers::Send for sigaction { }
-    unsafe impl ::markers::Sync for sigaction { }
+    unsafe impl ::marker::Send for sigaction { }
+    unsafe impl ::marker::Sync for sigaction { }
 
     #[repr(C)]
     #[cfg(target_word_size = "32")]
@@ -217,8 +217,8 @@ mod signal {
         sa_resv: [libc::c_int; 1],
     }
 
-    unsafe impl ::markers::Send for sigaction { }
-    unsafe impl ::markers::Sync for sigaction { }
+    unsafe impl ::marker::Send for sigaction { }
+    unsafe impl ::marker::Sync for sigaction { }
 
     #[repr(C)]
     pub struct sigset_t {
diff --git a/src/libstd/sys/unix/mutex.rs b/src/libstd/sys/unix/mutex.rs
index 8da25c7880d..ada8a7f2349 100644
--- a/src/libstd/sys/unix/mutex.rs
+++ b/src/libstd/sys/unix/mutex.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use cell::UnsafeCell;
-use markers::Sync;
+use marker::Sync;
 use sys::sync as ffi;
 use sys_common::mutex;
 
diff --git a/src/libstd/thread.rs b/src/libstd/thread.rs
index 630087e2291..43abd96e46d 100644
--- a/src/libstd/thread.rs
+++ b/src/libstd/thread.rs
@@ -128,7 +128,7 @@ use any::Any;
 use boxed::Box;
 use cell::UnsafeCell;
 use clone::Clone;
-use markers::{Send, Sync};
+use marker::{Send, Sync};
 use ops::{Drop, FnOnce};
 use option::Option::{self, Some, None};
 use result::Result::{Err, Ok};
diff --git a/src/libstd/thread_local/mod.rs b/src/libstd/thread_local/mod.rs
index bf01b578b1f..15b98e1aff0 100644
--- a/src/libstd/thread_local/mod.rs
+++ b/src/libstd/thread_local/mod.rs
@@ -346,7 +346,7 @@ mod imp {
         pub dtor_running: UnsafeCell<bool>, // should be Cell
     }
 
-    unsafe impl<T> ::markers::Sync for Key<T> { }
+    unsafe impl<T> ::marker::Sync for Key<T> { }
 
     #[doc(hidden)]
     impl<T> Key<T> {
@@ -472,7 +472,7 @@ mod imp {
         pub os: OsStaticKey,
     }
 
-    unsafe impl<T> ::markers::Sync for Key<T> { }
+    unsafe impl<T> ::marker::Sync for Key<T> { }
 
     struct Value<T: 'static> {
         key: &'static Key<T>,
diff --git a/src/libstd/thread_local/scoped.rs b/src/libstd/thread_local/scoped.rs
index a643d2cb8ee..1fb5652bc0c 100644
--- a/src/libstd/thread_local/scoped.rs
+++ b/src/libstd/thread_local/scoped.rs
@@ -108,7 +108,7 @@ macro_rules! __scoped_thread_local_inner {
         const _INIT: __Key<$t> = __Key {
             inner: ::std::thread_local::scoped::__impl::KeyInner {
                 inner: ::std::thread_local::scoped::__impl::OS_INIT,
-                marker: ::std::markers::InvariantType,
+                marker: ::std::marker::InvariantType,
             }
         };
 
@@ -211,7 +211,7 @@ mod imp {
     #[doc(hidden)]
     pub struct KeyInner<T> { pub inner: UnsafeCell<*mut T> }
 
-    unsafe impl<T> ::markers::Sync for KeyInner<T> { }
+    unsafe impl<T> ::marker::Sync for KeyInner<T> { }
 
     #[doc(hidden)]
     impl<T> KeyInner<T> {
@@ -224,16 +224,16 @@ mod imp {
 
 #[cfg(any(windows, target_os = "android", target_os = "ios", target_arch = "aarch64"))]
 mod imp {
-    use markers;
+    use marker;
     use sys_common::thread_local::StaticKey as OsStaticKey;
 
     #[doc(hidden)]
     pub struct KeyInner<T> {
         pub inner: OsStaticKey,
-        pub marker: markers::InvariantType<T>,
+        pub marker: marker::InvariantType<T>,
     }
 
-    unsafe impl<T> ::markers::Sync for KeyInner<T> { }
+    unsafe impl<T> ::marker::Sync for KeyInner<T> { }
 
     #[doc(hidden)]
     impl<T> KeyInner<T> {
diff --git a/src/libstd/thunk.rs b/src/libstd/thunk.rs
index ec9dd86f941..1830a4df54a 100644
--- a/src/libstd/thunk.rs
+++ b/src/libstd/thunk.rs
@@ -12,7 +12,7 @@
 #![allow(missing_docs)]
 
 use alloc::boxed::Box;
-use core::markers::Send;
+use core::marker::Send;
 use core::ops::FnOnce;
 
 pub struct Thunk<A=(),R=()> {
diff --git a/src/libsyntax/ext/deriving/bounds.rs b/src/libsyntax/ext/deriving/bounds.rs
index 50c91c13343..b4c171388db 100644
--- a/src/libsyntax/ext/deriving/bounds.rs
+++ b/src/libsyntax/ext/deriving/bounds.rs
@@ -47,7 +47,7 @@ pub fn expand_deriving_bound<F>(cx: &mut ExtCtxt,
     let trait_def = TraitDef {
         span: span,
         attributes: Vec::new(),
-        path: Path::new(vec!("std", "markers", name)),
+        path: Path::new(vec!("std", "marker", name)),
         additional_bounds: Vec::new(),
         generics: LifetimeBounds::empty(),
         methods: vec!()
diff --git a/src/libunicode/tables.rs b/src/libunicode/tables.rs
index 094d45a10d1..3f089d62e4e 100644
--- a/src/libunicode/tables.rs
+++ b/src/libunicode/tables.rs
@@ -7801,7 +7801,7 @@ pub mod charwidth {
 }
 
 pub mod grapheme {
-    use core::markers::Copy;
+    use core::marker::Copy;
     use core::slice::SliceExt;
     pub use self::GraphemeCat::*;
     use core::result::Result::{Ok, Err};
diff --git a/src/test/compile-fail/associated-types-unsized.rs b/src/test/compile-fail/associated-types-unsized.rs
index 28483abda3c..e4b97ab5933 100644
--- a/src/test/compile-fail/associated-types-unsized.rs
+++ b/src/test/compile-fail/associated-types-unsized.rs
@@ -14,7 +14,7 @@ trait Get {
 }
 
 fn foo<T:Get>(t: T) {
-    let x = t.get(); //~ ERROR the trait `core::markers::Sized` is not implemented
+    let x = t.get(); //~ ERROR the trait `core::marker::Sized` is not implemented
 }
 
 fn main() {
diff --git a/src/test/compile-fail/bad-method-typaram-kind.rs b/src/test/compile-fail/bad-method-typaram-kind.rs
index 33907dc4c46..349c33a30a5 100644
--- a/src/test/compile-fail/bad-method-typaram-kind.rs
+++ b/src/test/compile-fail/bad-method-typaram-kind.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 fn foo<T:'static>() {
-    1u.bar::<T>(); //~ ERROR `core::markers::Send` is not implemented
+    1u.bar::<T>(); //~ ERROR `core::marker::Send` is not implemented
 }
 
 trait bar {
diff --git a/src/test/compile-fail/bad-sized.rs b/src/test/compile-fail/bad-sized.rs
index 6e8fcba8c8a..69be6414e4c 100644
--- a/src/test/compile-fail/bad-sized.rs
+++ b/src/test/compile-fail/bad-sized.rs
@@ -16,8 +16,8 @@ trait Trait {}
 
 pub fn main() {
     let x: Vec<Trait + Sized> = Vec::new();
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
-    //~^^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
+    //~^^ ERROR the trait `core::marker::Sized` is not implemented
     let x: Vec<Box<RefCell<Trait + Sized>>> = Vec::new();
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
diff --git a/src/test/compile-fail/borrowck-move-out-of-static-item.rs b/src/test/compile-fail/borrowck-move-out-of-static-item.rs
index 310da28dd49..730a0c3e235 100644
--- a/src/test/compile-fail/borrowck-move-out-of-static-item.rs
+++ b/src/test/compile-fail/borrowck-move-out-of-static-item.rs
@@ -10,14 +10,14 @@
 
 // Ensure that moves out of static items is forbidden
 
-use std::markers;
+use std::marker;
 
 struct Foo {
     foo: int,
-    nocopy: markers::NoCopy
+    nocopy: marker::NoCopy
 }
 
-static BAR: Foo = Foo{foo: 5, nocopy: markers::NoCopy};
+static BAR: Foo = Foo{foo: 5, nocopy: marker::NoCopy};
 
 
 fn test(f: Foo) {
diff --git a/src/test/compile-fail/borrowck-struct-update-with-dtor.rs b/src/test/compile-fail/borrowck-struct-update-with-dtor.rs
index 36d430ddeaa..98a29f01faf 100644
--- a/src/test/compile-fail/borrowck-struct-update-with-dtor.rs
+++ b/src/test/compile-fail/borrowck-struct-update-with-dtor.rs
@@ -12,7 +12,7 @@
 // move, when the struct implements Drop.
 
 // NoCopy
-use std::markers::NoCopy as NP;
+use std::marker::NoCopy as NP;
 
 
 struct S { a: int, np: NP }
diff --git a/src/test/compile-fail/builtin-superkinds-double-superkind.rs b/src/test/compile-fail/builtin-superkinds-double-superkind.rs
index 03c1aa2a05d..cd215a73737 100644
--- a/src/test/compile-fail/builtin-superkinds-double-superkind.rs
+++ b/src/test/compile-fail/builtin-superkinds-double-superkind.rs
@@ -13,9 +13,9 @@
 
 trait Foo : Send+Sync { }
 
-impl <T: Sync+'static> Foo for (T,) { } //~ ERROR the trait `core::markers::Send` is not implemented
+impl <T: Sync+'static> Foo for (T,) { } //~ ERROR the trait `core::marker::Send` is not implemented
 
-impl <T: Send> Foo for (T,T) { } //~ ERROR the trait `core::markers::Sync` is not implemented
+impl <T: Send> Foo for (T,T) { } //~ ERROR the trait `core::marker::Sync` is not implemented
 
 impl <T: Send+Sync> Foo for (T,T,T) { } // (ok)
 
diff --git a/src/test/compile-fail/builtin-superkinds-in-metadata.rs b/src/test/compile-fail/builtin-superkinds-in-metadata.rs
index 1fa663640d8..138fcfa8b64 100644
--- a/src/test/compile-fail/builtin-superkinds-in-metadata.rs
+++ b/src/test/compile-fail/builtin-superkinds-in-metadata.rs
@@ -22,6 +22,6 @@ struct X<T>(T);
 impl <T:Sync> RequiresShare for X<T> { }
 
 impl <T:Sync+'static> RequiresRequiresShareAndSend for X<T> { }
-//~^ ERROR the trait `core::markers::Send` is not implemented
+//~^ ERROR the trait `core::marker::Send` is not implemented
 
 fn main() { }
diff --git a/src/test/compile-fail/builtin-superkinds-typaram-not-send.rs b/src/test/compile-fail/builtin-superkinds-typaram-not-send.rs
index 2c295768e7a..534bb6d37ec 100644
--- a/src/test/compile-fail/builtin-superkinds-typaram-not-send.rs
+++ b/src/test/compile-fail/builtin-superkinds-typaram-not-send.rs
@@ -12,6 +12,6 @@
 
 trait Foo : Send { }
 
-impl <T: Sync+'static> Foo for T { } //~ ERROR the trait `core::markers::Send` is not implemented
+impl <T: Sync+'static> Foo for T { } //~ ERROR the trait `core::marker::Send` is not implemented
 
 fn main() { }
diff --git a/src/test/compile-fail/check-static-values-constraints.rs b/src/test/compile-fail/check-static-values-constraints.rs
index 8b7d2457d3c..1c7ae05961e 100644
--- a/src/test/compile-fail/check-static-values-constraints.rs
+++ b/src/test/compile-fail/check-static-values-constraints.rs
@@ -10,7 +10,7 @@
 
 // Verifies all possible restrictions for statics values.
 
-use std::markers;
+use std::marker;
 
 struct WithDtor;
 
diff --git a/src/test/compile-fail/closure-bounds-cant-promote-superkind-in-struct.rs b/src/test/compile-fail/closure-bounds-cant-promote-superkind-in-struct.rs
index a02d6b7f517..b88040cbd54 100644
--- a/src/test/compile-fail/closure-bounds-cant-promote-superkind-in-struct.rs
+++ b/src/test/compile-fail/closure-bounds-cant-promote-superkind-in-struct.rs
@@ -13,7 +13,7 @@ struct X<F> where F: FnOnce() + 'static + Send {
 }
 
 fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static {
-    //~^ ERROR the trait `core::kinds::Send` is not implemented for the type
+    //~^ ERROR the trait `core::marker::Send` is not implemented for the type
     return X { field: blk };
 }
 
diff --git a/src/test/compile-fail/closure-bounds-subtype.rs b/src/test/compile-fail/closure-bounds-subtype.rs
index 509fffc5c9a..fadaa84f19d 100644
--- a/src/test/compile-fail/closure-bounds-subtype.rs
+++ b/src/test/compile-fail/closure-bounds-subtype.rs
@@ -21,7 +21,7 @@ fn give_any<F>(f: F) where F: FnOnce() {
 
 fn give_owned<F>(f: F) where F: FnOnce() + Send {
     take_any(f);
-    take_const_owned(f); //~ ERROR the trait `core::kinds::Sync` is not implemented for the type
+    take_const_owned(f); //~ ERROR the trait `core::marker::Sync` is not implemented for the type
 }
 
 fn main() {}
diff --git a/src/test/compile-fail/comm-not-freeze-receiver.rs b/src/test/compile-fail/comm-not-freeze-receiver.rs
index 5dce6ba8133..a7962c09fb3 100644
--- a/src/test/compile-fail/comm-not-freeze-receiver.rs
+++ b/src/test/compile-fail/comm-not-freeze-receiver.rs
@@ -13,5 +13,5 @@ use std::sync::mpsc::Receiver;
 fn test<T: Sync>() {}
 
 fn main() {
-    test::<Receiver<int>>();   //~ ERROR: `core::markers::Sync` is not implemented
+    test::<Receiver<int>>();   //~ ERROR: `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/comm-not-freeze.rs b/src/test/compile-fail/comm-not-freeze.rs
index 0f34ccf4a52..1977438d423 100644
--- a/src/test/compile-fail/comm-not-freeze.rs
+++ b/src/test/compile-fail/comm-not-freeze.rs
@@ -13,5 +13,5 @@ use std::sync::mpsc::Sender;
 fn test<T: Sync>() {}
 
 fn main() {
-    test::<Sender<int>>();     //~ ERROR: `core::markers::Sync` is not implemented
+    test::<Sender<int>>();     //~ ERROR: `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/dst-bad-assign-2.rs b/src/test/compile-fail/dst-bad-assign-2.rs
index b9c06c60a5d..ebd0ee97efe 100644
--- a/src/test/compile-fail/dst-bad-assign-2.rs
+++ b/src/test/compile-fail/dst-bad-assign-2.rs
@@ -43,5 +43,5 @@ pub fn main() {
     let f5: &mut Fat<ToBar> = &mut Fat { f1: 5, f2: "some str", ptr: Bar1 {f :42} };
     let z: Box<ToBar> = box Bar1 {f: 36};
     f5.ptr = *z;
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
diff --git a/src/test/compile-fail/dst-bad-assign.rs b/src/test/compile-fail/dst-bad-assign.rs
index 2516d987455..f52c990ca52 100644
--- a/src/test/compile-fail/dst-bad-assign.rs
+++ b/src/test/compile-fail/dst-bad-assign.rs
@@ -43,5 +43,5 @@ pub fn main() {
     let f5: &mut Fat<ToBar> = &mut Fat { f1: 5, f2: "some str", ptr: Bar1 {f :42} };
     let z: Box<ToBar> = box Bar1 {f: 36};
     f5.ptr = Bar1 {f: 36}; //~ ERROR mismatched types: expected `ToBar`, found `Bar1`
-    //~^ ERROR the trait `core::markers::Sized` is not implemented for the type `ToBar`
+    //~^ ERROR the trait `core::marker::Sized` is not implemented for the type `ToBar`
 }
diff --git a/src/test/compile-fail/dst-bad-deep.rs b/src/test/compile-fail/dst-bad-deep.rs
index ed2ccc9d9cc..0276e2e418d 100644
--- a/src/test/compile-fail/dst-bad-deep.rs
+++ b/src/test/compile-fail/dst-bad-deep.rs
@@ -21,5 +21,5 @@ pub fn main() {
     let f: Fat<[int; 3]> = Fat { ptr: [5i, 6, 7] };
     let g: &Fat<[int]> = &f;
     let h: &Fat<Fat<[int]>> = &Fat { ptr: *g };
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
diff --git a/src/test/compile-fail/dst-object-from-unsized-type.rs b/src/test/compile-fail/dst-object-from-unsized-type.rs
index b28952d2b33..87ff4291f50 100644
--- a/src/test/compile-fail/dst-object-from-unsized-type.rs
+++ b/src/test/compile-fail/dst-object-from-unsized-type.rs
@@ -15,22 +15,22 @@ impl Foo for str {}
 
 fn test1<T: ?Sized + Foo>(t: &T) {
     let u: &Foo = t;
-    //~^ ERROR `core::markers::Sized` is not implemented for the type `T`
+    //~^ ERROR `core::marker::Sized` is not implemented for the type `T`
 }
 
 fn test2<T: ?Sized + Foo>(t: &T) {
     let v: &Foo = t as &Foo;
-    //~^ ERROR `core::markers::Sized` is not implemented for the type `T`
+    //~^ ERROR `core::marker::Sized` is not implemented for the type `T`
 }
 
 fn test3() {
     let _: &[&Foo] = &["hi"];
-    //~^ ERROR `core::markers::Sized` is not implemented for the type `str`
+    //~^ ERROR `core::marker::Sized` is not implemented for the type `str`
 }
 
 fn test4() {
     let _: &Foo = "hi" as &Foo;
-    //~^ ERROR `core::markers::Sized` is not implemented for the type `str`
+    //~^ ERROR `core::marker::Sized` is not implemented for the type `str`
 }
 
 fn main() { }
diff --git a/src/test/compile-fail/dst-sized-trait-param.rs b/src/test/compile-fail/dst-sized-trait-param.rs
index af0b780b3b7..d68d6676515 100644
--- a/src/test/compile-fail/dst-sized-trait-param.rs
+++ b/src/test/compile-fail/dst-sized-trait-param.rs
@@ -15,9 +15,9 @@
 trait Foo<T> : Sized { fn take(self, x: &T) { } } // Note: T is sized
 
 impl Foo<[int]> for uint { }
-//~^ ERROR the trait `core::markers::Sized` is not implemented for the type `[int]`
+//~^ ERROR the trait `core::marker::Sized` is not implemented for the type `[int]`
 
 impl Foo<int> for [uint] { }
-//~^ ERROR the trait `core::markers::Sized` is not implemented for the type `[uint]`
+//~^ ERROR the trait `core::marker::Sized` is not implemented for the type `[uint]`
 
 pub fn main() { }
diff --git a/src/test/compile-fail/error-should-say-copy-not-pod.rs b/src/test/compile-fail/error-should-say-copy-not-pod.rs
index 581a06db745..d79b3f472d0 100644
--- a/src/test/compile-fail/error-should-say-copy-not-pod.rs
+++ b/src/test/compile-fail/error-should-say-copy-not-pod.rs
@@ -13,5 +13,5 @@
 fn check_bound<T:Copy>(_: T) {}
 
 fn main() {
-    check_bound("nocopy".to_string()); //~ ERROR the trait `core::markers::Copy` is not implemented
+    check_bound("nocopy".to_string()); //~ ERROR the trait `core::marker::Copy` is not implemented
 }
diff --git a/src/test/compile-fail/issue-14366.rs b/src/test/compile-fail/issue-14366.rs
index d9b8c4db031..c7cac71af03 100644
--- a/src/test/compile-fail/issue-14366.rs
+++ b/src/test/compile-fail/issue-14366.rs
@@ -10,5 +10,5 @@
 
 fn main() {
     let _x = "test" as &::std::any::Any;
-//~^ ERROR the trait `core::markers::Sized` is not implemented for the type `str`
+//~^ ERROR the trait `core::marker::Sized` is not implemented for the type `str`
 }
diff --git a/src/test/compile-fail/issue-15756.rs b/src/test/compile-fail/issue-15756.rs
index 5e305313fcf..c2d30224dc8 100644
--- a/src/test/compile-fail/issue-15756.rs
+++ b/src/test/compile-fail/issue-15756.rs
@@ -15,7 +15,7 @@ fn dft_iter<'a, T>(arg1: Chunks<'a,T>, arg2: ChunksMut<'a,T>)
 {
     for
     &something
-//~^ ERROR the trait `core::markers::Sized` is not implemented for the type `[T]`
+//~^ ERROR the trait `core::marker::Sized` is not implemented for the type `[T]`
     in arg2
     {
     }
diff --git a/src/test/compile-fail/issue-16538.rs b/src/test/compile-fail/issue-16538.rs
index 505a59b484d..af686b86813 100644
--- a/src/test/compile-fail/issue-16538.rs
+++ b/src/test/compile-fail/issue-16538.rs
@@ -20,6 +20,6 @@ mod Y {
 
 static foo: *const Y::X = Y::foo(Y::x as *const Y::X);
 //~^ ERROR cannot refer to other statics by value
-//~| ERROR: the trait `core::markers::Sync` is not implemented for the type
+//~| ERROR: the trait `core::marker::Sync` is not implemented for the type
 
 fn main() {}
diff --git a/src/test/compile-fail/issue-17718-static-move.rs b/src/test/compile-fail/issue-17718-static-move.rs
index 730344f5763..4f3668b819a 100644
--- a/src/test/compile-fail/issue-17718-static-move.rs
+++ b/src/test/compile-fail/issue-17718-static-move.rs
@@ -8,10 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
-struct Foo { nc: markers::NoCopy }
-const INIT: Foo = Foo { nc: markers::NoCopy };
+struct Foo { nc: marker::NoCopy }
+const INIT: Foo = Foo { nc: marker::NoCopy };
 static FOO: Foo = INIT;
 
 fn main() {
diff --git a/src/test/compile-fail/issue-17718-static-sync.rs b/src/test/compile-fail/issue-17718-static-sync.rs
index da343cc81ac..147bff2e977 100644
--- a/src/test/compile-fail/issue-17718-static-sync.rs
+++ b/src/test/compile-fail/issue-17718-static-sync.rs
@@ -8,12 +8,12 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
-struct Foo { marker: markers::NoSync }
+struct Foo { marker: marker::NoSync }
 
 static FOO: uint = 3;
-static BAR: Foo = Foo { marker: markers::NoSync };
-//~^ ERROR: the trait `core::markers::Sync` is not implemented
+static BAR: Foo = Foo { marker: marker::NoSync };
+//~^ ERROR: the trait `core::marker::Sync` is not implemented
 
 fn main() {}
diff --git a/src/test/compile-fail/issue-18107.rs b/src/test/compile-fail/issue-18107.rs
index a17b2ee0c68..b8249ebd479 100644
--- a/src/test/compile-fail/issue-18107.rs
+++ b/src/test/compile-fail/issue-18107.rs
@@ -14,7 +14,7 @@ pub trait AbstractRenderer {}
 
 fn _create_render(_: &()) ->
     AbstractRenderer
-//~^ ERROR: the trait `core::markers::Sized` is not implemented
+//~^ ERROR: the trait `core::marker::Sized` is not implemented
 {
     match 0u {
         _ => unimplemented!()
diff --git a/src/test/compile-fail/issue-19883.rs b/src/test/compile-fail/issue-19883.rs
index b9fbc37828f..bbc5ee6c8f3 100644
--- a/src/test/compile-fail/issue-19883.rs
+++ b/src/test/compile-fail/issue-19883.rs
@@ -18,13 +18,13 @@ trait To {
     // This is a typo, the return type should be `<Dst as From<Self>>::Output`
     fn to<Dst: From<Self>>(
         self
-        //~^ error: the trait `core::markers::Sized` is not implemented
+        //~^ error: the trait `core::marker::Sized` is not implemented
     ) ->
         <Dst as From<Self>>::Dst
-        //~^ error: the trait `core::markers::Sized` is not implemented
+        //~^ error: the trait `core::marker::Sized` is not implemented
     {
         From::from(
-            //~^ error: the trait `core::markers::Sized` is not implemented
+            //~^ error: the trait `core::marker::Sized` is not implemented
             self
         )
     }
diff --git a/src/test/compile-fail/issue-20005.rs b/src/test/compile-fail/issue-20005.rs
index 8076df39db9..d91479a2e4e 100644
--- a/src/test/compile-fail/issue-20005.rs
+++ b/src/test/compile-fail/issue-20005.rs
@@ -16,9 +16,9 @@ trait From<Src> {
 
 trait To {
     fn to<Dst>(
-        self //~ error: the trait `core::markers::Sized` is not implemented
+        self //~ error: the trait `core::marker::Sized` is not implemented
     ) -> <Dst as From<Self>>::Result where Dst: From<Self> {
-        From::from( //~ error: the trait `core::markers::Sized` is not implemented
+        From::from( //~ error: the trait `core::marker::Sized` is not implemented
             self
         )
     }
diff --git a/src/test/compile-fail/issue-3907-2.rs b/src/test/compile-fail/issue-3907-2.rs
index da60fee65c6..546b808a38f 100644
--- a/src/test/compile-fail/issue-3907-2.rs
+++ b/src/test/compile-fail/issue-3907-2.rs
@@ -17,6 +17,6 @@ struct S {
     name: int
 }
 
-fn bar(_x: Foo) {} //~ ERROR the trait `core::markers::Sized` is not implemented
+fn bar(_x: Foo) {} //~ ERROR the trait `core::marker::Sized` is not implemented
 
 fn main() {}
diff --git a/src/test/compile-fail/issue-5035-2.rs b/src/test/compile-fail/issue-5035-2.rs
index 05073927beb..9e324cdd61e 100644
--- a/src/test/compile-fail/issue-5035-2.rs
+++ b/src/test/compile-fail/issue-5035-2.rs
@@ -11,6 +11,6 @@
 trait I {}
 type K = I+'static;
 
-fn foo(_x: K) {} //~ ERROR: the trait `core::markers::Sized` is not implemented
+fn foo(_x: K) {} //~ ERROR: the trait `core::marker::Sized` is not implemented
 
 fn main() {}
diff --git a/src/test/compile-fail/issue-5543.rs b/src/test/compile-fail/issue-5543.rs
index 6981c4451ca..2d64013dc27 100644
--- a/src/test/compile-fail/issue-5543.rs
+++ b/src/test/compile-fail/issue-5543.rs
@@ -14,5 +14,5 @@ impl Foo for u8 {}
 fn main() {
     let r: Box<Foo> = box 5;
     let _m: Box<Foo> = r as Box<Foo>;
-    //~^ ERROR `core::markers::Sized` is not implemented for the type `Foo`
+    //~^ ERROR `core::marker::Sized` is not implemented for the type `Foo`
 }
diff --git a/src/test/compile-fail/issue-5883.rs b/src/test/compile-fail/issue-5883.rs
index 2f601a8ba58..9ff957b6e6d 100644
--- a/src/test/compile-fail/issue-5883.rs
+++ b/src/test/compile-fail/issue-5883.rs
@@ -15,8 +15,8 @@ struct Struct {
 }
 
 fn new_struct(r: A+'static)
-    -> Struct { //~^  ERROR the trait `core::markers::Sized` is not implemented
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    -> Struct { //~^  ERROR the trait `core::marker::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
     Struct { r: r }
 }
 
diff --git a/src/test/compile-fail/issue-7013.rs b/src/test/compile-fail/issue-7013.rs
index 30a59c52faa..d2f9ee47603 100644
--- a/src/test/compile-fail/issue-7013.rs
+++ b/src/test/compile-fail/issue-7013.rs
@@ -32,6 +32,6 @@ struct A {
 
 fn main() {
     let a = A {v: box B{v: None} as Box<Foo+Send>};
-    //~^ ERROR the trait `core::markers::Send` is not implemented
-    //~^^ ERROR the trait `core::markers::Send` is not implemented
+    //~^ ERROR the trait `core::marker::Send` is not implemented
+    //~^^ ERROR the trait `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/issue-7364.rs b/src/test/compile-fail/issue-7364.rs
index c4217029a93..c8c7ef4ed89 100644
--- a/src/test/compile-fail/issue-7364.rs
+++ b/src/test/compile-fail/issue-7364.rs
@@ -14,7 +14,7 @@ use std::cell::RefCell;
 // Regresion test for issue 7364
 static boxed: Box<RefCell<int>> = box RefCell::new(0);
 //~^ ERROR statics are not allowed to have custom pointers
-//~| ERROR: the trait `core::markers::Sync` is not implemented for the type
-//~| ERROR: the trait `core::markers::Sync` is not implemented for the type
+//~| ERROR: the trait `core::marker::Sync` is not implemented for the type
+//~| ERROR: the trait `core::marker::Sync` is not implemented for the type
 
 fn main() { }
diff --git a/src/test/compile-fail/kindck-copy.rs b/src/test/compile-fail/kindck-copy.rs
index 583fbedfcbc..ac088e69a28 100644
--- a/src/test/compile-fail/kindck-copy.rs
+++ b/src/test/compile-fail/kindck-copy.rs
@@ -36,14 +36,14 @@ fn test<'a,T,U:Copy>(_: &'a int) {
     assert_copy::<&'a [int]>();
 
     // ...unless they are mutable
-    assert_copy::<&'static mut int>(); //~ ERROR `core::markers::Copy` is not implemented
-    assert_copy::<&'a mut int>();  //~ ERROR `core::markers::Copy` is not implemented
+    assert_copy::<&'static mut int>(); //~ ERROR `core::marker::Copy` is not implemented
+    assert_copy::<&'a mut int>();  //~ ERROR `core::marker::Copy` is not implemented
 
     // ~ pointers are not ok
-    assert_copy::<Box<int>>();   //~ ERROR `core::markers::Copy` is not implemented
-    assert_copy::<String>();   //~ ERROR `core::markers::Copy` is not implemented
-    assert_copy::<Vec<int> >(); //~ ERROR `core::markers::Copy` is not implemented
-    assert_copy::<Box<&'a mut int>>(); //~ ERROR `core::markers::Copy` is not implemented
+    assert_copy::<Box<int>>();   //~ ERROR `core::marker::Copy` is not implemented
+    assert_copy::<String>();   //~ ERROR `core::marker::Copy` is not implemented
+    assert_copy::<Vec<int> >(); //~ ERROR `core::marker::Copy` is not implemented
+    assert_copy::<Box<&'a mut int>>(); //~ ERROR `core::marker::Copy` is not implemented
 
     // borrowed object types are generally ok
     assert_copy::<&'a Dummy>();
@@ -51,11 +51,11 @@ fn test<'a,T,U:Copy>(_: &'a int) {
     assert_copy::<&'static (Dummy+Copy)>();
 
     // owned object types are not ok
-    assert_copy::<Box<Dummy>>(); //~ ERROR `core::markers::Copy` is not implemented
-    assert_copy::<Box<Dummy+Copy>>(); //~ ERROR `core::markers::Copy` is not implemented
+    assert_copy::<Box<Dummy>>(); //~ ERROR `core::marker::Copy` is not implemented
+    assert_copy::<Box<Dummy+Copy>>(); //~ ERROR `core::marker::Copy` is not implemented
 
     // mutable object types are not ok
-    assert_copy::<&'a mut (Dummy+Copy)>();  //~ ERROR `core::markers::Copy` is not implemented
+    assert_copy::<&'a mut (Dummy+Copy)>();  //~ ERROR `core::marker::Copy` is not implemented
 
     // unsafe ptrs are ok
     assert_copy::<*const int>();
@@ -73,10 +73,10 @@ fn test<'a,T,U:Copy>(_: &'a int) {
     assert_copy::<MyStruct>();
 
     // structs containing non-POD are not ok
-    assert_copy::<MyNoncopyStruct>(); //~ ERROR `core::markers::Copy` is not implemented
+    assert_copy::<MyNoncopyStruct>(); //~ ERROR `core::marker::Copy` is not implemented
 
     // ref counted types are not ok
-    assert_copy::<Rc<int>>();   //~ ERROR `core::markers::Copy` is not implemented
+    assert_copy::<Rc<int>>();   //~ ERROR `core::marker::Copy` is not implemented
 }
 
 pub fn main() {
diff --git a/src/test/compile-fail/kindck-impl-type-params-2.rs b/src/test/compile-fail/kindck-impl-type-params-2.rs
index 2ec22ceb63f..9e7c983195a 100644
--- a/src/test/compile-fail/kindck-impl-type-params-2.rs
+++ b/src/test/compile-fail/kindck-impl-type-params-2.rs
@@ -19,5 +19,5 @@ fn take_param<T:Foo>(foo: &T) { }
 fn main() {
     let x = box 3i;
     take_param(&x);
-    //~^ ERROR the trait `core::markers::Copy` is not implemented
+    //~^ ERROR the trait `core::marker::Copy` is not implemented
 }
diff --git a/src/test/compile-fail/kindck-impl-type-params.rs b/src/test/compile-fail/kindck-impl-type-params.rs
index ad62fd98560..6ecf2593d00 100644
--- a/src/test/compile-fail/kindck-impl-type-params.rs
+++ b/src/test/compile-fail/kindck-impl-type-params.rs
@@ -20,15 +20,15 @@ impl<T: Send + Copy> Gettable<T> for S<T> {}
 fn f<T>(val: T) {
     let t: S<T> = S;
     let a = &t as &Gettable<T>;
-    //~^ ERROR the trait `core::markers::Send` is not implemented
-    //~^^ ERROR the trait `core::markers::Copy` is not implemented
+    //~^ ERROR the trait `core::marker::Send` is not implemented
+    //~^^ ERROR the trait `core::marker::Copy` is not implemented
 }
 
 fn g<T>(val: T) {
     let t: S<T> = S;
     let a: &Gettable<T> = &t;
-    //~^ ERROR the trait `core::markers::Send` is not implemented
-    //~^^ ERROR the trait `core::markers::Copy` is not implemented
+    //~^ ERROR the trait `core::marker::Send` is not implemented
+    //~^^ ERROR the trait `core::marker::Copy` is not implemented
 }
 
 fn foo<'a>() {
@@ -40,13 +40,13 @@ fn foo<'a>() {
 fn foo2<'a>() {
     let t: Box<S<String>> = box S;
     let a = t as Box<Gettable<String>>;
-    //~^ ERROR the trait `core::markers::Copy` is not implemented
+    //~^ ERROR the trait `core::marker::Copy` is not implemented
 }
 
 fn foo3<'a>() {
     let t: Box<S<String>> = box S;
     let a: Box<Gettable<String>> = t;
-    //~^ ERROR the trait `core::markers::Copy` is not implemented
+    //~^ ERROR the trait `core::marker::Copy` is not implemented
 }
 
 fn main() { }
diff --git a/src/test/compile-fail/kindck-inherited-copy-bound.rs b/src/test/compile-fail/kindck-inherited-copy-bound.rs
index 238f495187c..7f610176b65 100644
--- a/src/test/compile-fail/kindck-inherited-copy-bound.rs
+++ b/src/test/compile-fail/kindck-inherited-copy-bound.rs
@@ -22,13 +22,13 @@ fn take_param<T:Foo>(foo: &T) { }
 
 fn a() {
     let x = box 3i;
-    take_param(&x); //~ ERROR `core::markers::Copy` is not implemented
+    take_param(&x); //~ ERROR `core::marker::Copy` is not implemented
 }
 
 fn b() {
     let x = box 3i;
     let y = &x;
-    let z = &x as &Foo; //~ ERROR `core::markers::Copy` is not implemented
+    let z = &x as &Foo; //~ ERROR `core::marker::Copy` is not implemented
 }
 
 fn main() { }
diff --git a/src/test/compile-fail/kindck-nonsendable-1.rs b/src/test/compile-fail/kindck-nonsendable-1.rs
index b46f91413a4..a13a3f7c4ab 100644
--- a/src/test/compile-fail/kindck-nonsendable-1.rs
+++ b/src/test/compile-fail/kindck-nonsendable-1.rs
@@ -18,7 +18,7 @@ fn bar<F:FnOnce() + Send>(_: F) { }
 fn main() {
     let x = Rc::new(3u);
     bar(move|| foo(x));
-    //~^ ERROR `core::markers::Send` is not implemented
-    //~^^ ERROR `core::markers::Send` is not implemented
+    //~^ ERROR `core::marker::Send` is not implemented
+    //~^^ ERROR `core::marker::Send` is not implemented
 }
 
diff --git a/src/test/compile-fail/kindck-send-object.rs b/src/test/compile-fail/kindck-send-object.rs
index 1235a0a1228..7984b3b32c2 100644
--- a/src/test/compile-fail/kindck-send-object.rs
+++ b/src/test/compile-fail/kindck-send-object.rs
@@ -20,11 +20,11 @@ trait Message : Send { }
 
 fn object_ref_with_static_bound_not_ok() {
     assert_send::<&'static (Dummy+'static)>();
-    //~^ ERROR the trait `core::markers::Send` is not implemented
+    //~^ ERROR the trait `core::marker::Send` is not implemented
 }
 
 fn box_object_with_no_bound_not_ok<'a>() {
-    assert_send::<Box<Dummy>>(); //~ ERROR the trait `core::markers::Send` is not implemented
+    assert_send::<Box<Dummy>>(); //~ ERROR the trait `core::marker::Send` is not implemented
 }
 
 fn object_with_send_bound_ok() {
diff --git a/src/test/compile-fail/kindck-send-object1.rs b/src/test/compile-fail/kindck-send-object1.rs
index 4f1a95859ae..c781fffff2d 100644
--- a/src/test/compile-fail/kindck-send-object1.rs
+++ b/src/test/compile-fail/kindck-send-object1.rs
@@ -18,7 +18,7 @@ trait Dummy { }
 // careful with object types, who knows what they close over...
 fn test51<'a>() {
     assert_send::<&'a Dummy>();
-    //~^ ERROR the trait `core::markers::Send` is not implemented
+    //~^ ERROR the trait `core::marker::Send` is not implemented
 }
 fn test52<'a>() {
     assert_send::<&'a (Dummy+Send)>();
@@ -37,7 +37,7 @@ fn test61() {
 // them not ok
 fn test_71<'a>() {
     assert_send::<Box<Dummy+'a>>();
-    //~^ ERROR the trait `core::markers::Send` is not implemented
+    //~^ ERROR the trait `core::marker::Send` is not implemented
 }
 
 fn main() { }
diff --git a/src/test/compile-fail/kindck-send-object2.rs b/src/test/compile-fail/kindck-send-object2.rs
index 06b8cf20258..75bae09b37f 100644
--- a/src/test/compile-fail/kindck-send-object2.rs
+++ b/src/test/compile-fail/kindck-send-object2.rs
@@ -14,11 +14,11 @@ fn assert_send<T:Send>() { }
 trait Dummy { }
 
 fn test50() {
-    assert_send::<&'static Dummy>(); //~ ERROR the trait `core::markers::Send` is not implemented
+    assert_send::<&'static Dummy>(); //~ ERROR the trait `core::marker::Send` is not implemented
 }
 
 fn test53() {
-    assert_send::<Box<Dummy>>(); //~ ERROR the trait `core::markers::Send` is not implemented
+    assert_send::<Box<Dummy>>(); //~ ERROR the trait `core::marker::Send` is not implemented
 }
 
 // ...unless they are properly bounded
diff --git a/src/test/compile-fail/kindck-send-unsafe.rs b/src/test/compile-fail/kindck-send-unsafe.rs
index 0a2f4cbce85..1bfd0d4a11f 100644
--- a/src/test/compile-fail/kindck-send-unsafe.rs
+++ b/src/test/compile-fail/kindck-send-unsafe.rs
@@ -14,7 +14,7 @@ fn assert_send<T:Send>() { }
 
 fn test71<'a>() {
     assert_send::<*mut &'a int>();
-    //~^ ERROR the trait `core::markers::Send` is not implemented for the type
+    //~^ ERROR the trait `core::marker::Send` is not implemented for the type
 }
 
 fn main() {
diff --git a/src/test/compile-fail/lint-dead-code-4.rs b/src/test/compile-fail/lint-dead-code-4.rs
index 3bdc44ec363..21e1ab4c33e 100644
--- a/src/test/compile-fail/lint-dead-code-4.rs
+++ b/src/test/compile-fail/lint-dead-code-4.rs
@@ -19,7 +19,7 @@ use std::num::Int;
 struct Foo {
     x: uint,
     b: bool, //~ ERROR: struct field is never used
-    marker: std::markers::NoCopy
+    marker: std::marker::NoCopy
 }
 
 fn field_read(f: Foo) -> uint {
@@ -59,7 +59,7 @@ fn field_match_in_let(f: Bar) -> bool {
 }
 
 fn main() {
-    field_read(Foo { x: 1, b: false, marker: std::markers::NoCopy });
+    field_read(Foo { x: 1, b: false, marker: std::marker::NoCopy });
     field_match_in_patterns(XYZ::Z);
     field_match_in_let(Bar { x: 42u, b: true, _guard: () });
     let _ = Baz { x: 0 };
diff --git a/src/test/compile-fail/marker-no-copy.rs b/src/test/compile-fail/marker-no-copy.rs
index e329cdc32d3..d9e139cc9db 100644
--- a/src/test/compile-fail/marker-no-copy.rs
+++ b/src/test/compile-fail/marker-no-copy.rs
@@ -8,11 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
 fn foo<P:Copy>(p: P) { }
 
 fn main()
 {
-    foo(markers::NoCopy); //~ ERROR the trait `core::markers::Copy` is not implemented
+    foo(marker::NoCopy); //~ ERROR the trait `core::marker::Copy` is not implemented
 }
diff --git a/src/test/compile-fail/marker-no-send.rs b/src/test/compile-fail/marker-no-send.rs
index dcbe63a417d..032718d7e9a 100644
--- a/src/test/compile-fail/marker-no-send.rs
+++ b/src/test/compile-fail/marker-no-send.rs
@@ -8,11 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
 fn foo<P:Send>(p: P) { }
 
 fn main()
 {
-    foo(markers::NoSend); //~ ERROR the trait `core::markers::Send` is not implemented
+    foo(marker::NoSend); //~ ERROR the trait `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/marker-no-share.rs b/src/test/compile-fail/marker-no-share.rs
index 77d5fc23a35..b29f7fab2cc 100644
--- a/src/test/compile-fail/marker-no-share.rs
+++ b/src/test/compile-fail/marker-no-share.rs
@@ -8,11 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
 fn foo<P: Sync>(p: P) { }
 
 fn main()
 {
-    foo(markers::NoSync); //~ ERROR the trait `core::markers::Sync` is not implemented
+    foo(marker::NoSync); //~ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/mut-not-freeze.rs b/src/test/compile-fail/mut-not-freeze.rs
index 711763c20c6..d7529c86aa5 100644
--- a/src/test/compile-fail/mut-not-freeze.rs
+++ b/src/test/compile-fail/mut-not-freeze.rs
@@ -15,6 +15,6 @@ fn f<T: Sync>(_: T) {}
 fn main() {
     let x = RefCell::new(0i);
     f(x);
-    //~^ ERROR `core::markers::Sync` is not implemented
-    //~^^ ERROR `core::markers::Sync` is not implemented
+    //~^ ERROR `core::marker::Sync` is not implemented
+    //~^^ ERROR `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/mutable-enum-indirect.rs b/src/test/compile-fail/mutable-enum-indirect.rs
index 01c977dc62c..f90bb610d37 100644
--- a/src/test/compile-fail/mutable-enum-indirect.rs
+++ b/src/test/compile-fail/mutable-enum-indirect.rs
@@ -11,13 +11,13 @@
 // Tests that an `&` pointer to something inherently mutable is itself
 // to be considered mutable.
 
-use std::markers;
+use std::marker;
 
-enum Foo { A(markers::NoSync) }
+enum Foo { A(marker::NoSync) }
 
 fn bar<T: Sync>(_: T) {}
 
 fn main() {
-    let x = Foo::A(markers::NoSync);
-    bar(&x); //~ ERROR the trait `core::markers::Sync` is not implemented
+    let x = Foo::A(marker::NoSync);
+    bar(&x); //~ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/no-send-res-ports.rs b/src/test/compile-fail/no-send-res-ports.rs
index 66082d46549..0b0a83a4196 100644
--- a/src/test/compile-fail/no-send-res-ports.rs
+++ b/src/test/compile-fail/no-send-res-ports.rs
@@ -36,8 +36,8 @@ fn main() {
     let x = foo(Port(Rc::new(())));
 
     Thread::spawn(move|| {
-        //~^ ERROR `core::markers::Send` is not implemented
-        //~^^ ERROR `core::markers::Send` is not implemented
+        //~^ ERROR `core::marker::Send` is not implemented
+        //~^^ ERROR `core::marker::Send` is not implemented
         let y = x;
         println!("{}", y);
     });
diff --git a/src/test/compile-fail/no_send-enum.rs b/src/test/compile-fail/no_send-enum.rs
index 2a0ffd93208..cf1f13e8bb8 100644
--- a/src/test/compile-fail/no_send-enum.rs
+++ b/src/test/compile-fail/no_send-enum.rs
@@ -8,16 +8,16 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
 enum Foo {
-    A(markers::NoSend)
+    A(marker::NoSend)
 }
 
 fn bar<T: Send>(_: T) {}
 
 fn main() {
-    let x = Foo::A(markers::NoSend);
+    let x = Foo::A(marker::NoSend);
     bar(x);
-    //~^ ERROR `core::markers::Send` is not implemented
+    //~^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/no_send-rc.rs b/src/test/compile-fail/no_send-rc.rs
index e604fd9f838..95855ed584b 100644
--- a/src/test/compile-fail/no_send-rc.rs
+++ b/src/test/compile-fail/no_send-rc.rs
@@ -15,6 +15,6 @@ fn bar<T: Send>(_: T) {}
 fn main() {
     let x = Rc::new(5i);
     bar(x);
-    //~^ ERROR `core::markers::Send` is not implemented
-    //~^^ ERROR `core::markers::Send` is not implemented
+    //~^ ERROR `core::marker::Send` is not implemented
+    //~^^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/no_send-struct.rs b/src/test/compile-fail/no_send-struct.rs
index 7e2f7c55bd2..c2d6f04c7d4 100644
--- a/src/test/compile-fail/no_send-struct.rs
+++ b/src/test/compile-fail/no_send-struct.rs
@@ -8,17 +8,17 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
 struct Foo {
     a: int,
-    ns: markers::NoSend
+    ns: marker::NoSend
 }
 
 fn bar<T: Send>(_: T) {}
 
 fn main() {
-    let x = Foo { a: 5, ns: markers::NoSend };
+    let x = Foo { a: 5, ns: marker::NoSend };
     bar(x);
-    //~^ ERROR the trait `core::markers::Send` is not implemented
+    //~^ ERROR the trait `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/no_share-enum.rs b/src/test/compile-fail/no_share-enum.rs
index aeaa56c35a8..33222eef44e 100644
--- a/src/test/compile-fail/no_share-enum.rs
+++ b/src/test/compile-fail/no_share-enum.rs
@@ -8,14 +8,14 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
-enum Foo { A(markers::NoSync) }
+enum Foo { A(marker::NoSync) }
 
 fn bar<T: Sync>(_: T) {}
 
 fn main() {
-    let x = Foo::A(markers::NoSync);
+    let x = Foo::A(marker::NoSync);
     bar(x);
-    //~^ ERROR the trait `core::markers::Sync` is not implemented
+    //~^ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/no_share-rc.rs b/src/test/compile-fail/no_share-rc.rs
index 66e8571527d..0f3573e0ad5 100644
--- a/src/test/compile-fail/no_share-rc.rs
+++ b/src/test/compile-fail/no_share-rc.rs
@@ -16,6 +16,6 @@ fn bar<T: Sync>(_: T) {}
 fn main() {
     let x = Rc::new(RefCell::new(5i));
     bar(x);
-    //~^ ERROR the trait `core::markers::Sync` is not implemented
-    //~^^ ERROR the trait `core::markers::Sync` is not implemented
+    //~^ ERROR the trait `core::marker::Sync` is not implemented
+    //~^^ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/no_share-struct.rs b/src/test/compile-fail/no_share-struct.rs
index ee6a29d3176..59864b63b04 100644
--- a/src/test/compile-fail/no_share-struct.rs
+++ b/src/test/compile-fail/no_share-struct.rs
@@ -8,14 +8,14 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
-struct Foo { a: int, m: markers::NoSync }
+struct Foo { a: int, m: marker::NoSync }
 
 fn bar<T: Sync>(_: T) {}
 
 fn main() {
-    let x = Foo { a: 5, m: markers::NoSync };
+    let x = Foo { a: 5, m: marker::NoSync };
     bar(x);
-    //~^ ERROR the trait `core::markers::Sync` is not implemented
+    //~^ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/opt-out-copy-bad.rs b/src/test/compile-fail/opt-out-copy-bad.rs
index f949e89fcac..9e425fa8f2e 100644
--- a/src/test/compile-fail/opt-out-copy-bad.rs
+++ b/src/test/compile-fail/opt-out-copy-bad.rs
@@ -30,7 +30,7 @@ impl Copy for IWantToCopyThis {}
 
 enum CantCopyThisEither {
     A,
-    B(::std::markers::NoCopy),
+    B(::std::marker::NoCopy),
 }
 
 enum IWantToCopyThisToo {
diff --git a/src/test/compile-fail/range-1.rs b/src/test/compile-fail/range-1.rs
index b05117a7185..0ade2975044 100644
--- a/src/test/compile-fail/range-1.rs
+++ b/src/test/compile-fail/range-1.rs
@@ -23,5 +23,5 @@ pub fn main() {
     // Unsized type.
     let arr: &[_] = &[1u, 2, 3];
     let range = (*arr)..;
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
diff --git a/src/test/compile-fail/regions-infer-contravariance-due-to-decl.rs b/src/test/compile-fail/regions-infer-contravariance-due-to-decl.rs
index d8bad0f9103..4d31d2c8e69 100644
--- a/src/test/compile-fail/regions-infer-contravariance-due-to-decl.rs
+++ b/src/test/compile-fail/regions-infer-contravariance-due-to-decl.rs
@@ -14,13 +14,13 @@
 // Note: see variance-regions-*.rs for the tests that check that the
 // variance inference works in the first place.
 
-use std::markers;
+use std::marker;
 
 // This is contravariant with respect to 'a, meaning that
 // Contravariant<'foo> <: Contravariant<'static> because
 // 'foo <= 'static
 struct Contravariant<'a> {
-    marker: markers::ContravariantLifetime<'a>
+    marker: marker::ContravariantLifetime<'a>
 }
 
 fn use_<'short,'long>(c: Contravariant<'short>,
diff --git a/src/test/compile-fail/regions-infer-covariance-due-to-decl.rs b/src/test/compile-fail/regions-infer-covariance-due-to-decl.rs
index 58c1f0c4721..1c3b7bb5960 100644
--- a/src/test/compile-fail/regions-infer-covariance-due-to-decl.rs
+++ b/src/test/compile-fail/regions-infer-covariance-due-to-decl.rs
@@ -14,10 +14,10 @@
 // Note: see variance-regions-*.rs for the tests that check that the
 // variance inference works in the first place.
 
-use std::markers;
+use std::marker;
 
 struct Covariant<'a> {
-    marker: markers::CovariantLifetime<'a>
+    marker: marker::CovariantLifetime<'a>
 }
 
 fn use_<'short,'long>(c: Covariant<'long>,
diff --git a/src/test/compile-fail/regions-infer-invariance-due-to-decl.rs b/src/test/compile-fail/regions-infer-invariance-due-to-decl.rs
index d3d6aa06cdb..5f4a1af6bf9 100644
--- a/src/test/compile-fail/regions-infer-invariance-due-to-decl.rs
+++ b/src/test/compile-fail/regions-infer-invariance-due-to-decl.rs
@@ -8,10 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 
 struct invariant<'a> {
-    marker: markers::InvariantLifetime<'a>
+    marker: marker::InvariantLifetime<'a>
 }
 
 fn to_same_lifetime<'r>(bi: invariant<'r>) {
diff --git a/src/test/compile-fail/repeat-to-run-dtor-twice.rs b/src/test/compile-fail/repeat-to-run-dtor-twice.rs
index d8a183c0e46..762c976a943 100644
--- a/src/test/compile-fail/repeat-to-run-dtor-twice.rs
+++ b/src/test/compile-fail/repeat-to-run-dtor-twice.rs
@@ -25,5 +25,5 @@ impl Drop for Foo {
 fn main() {
     let a = Foo { x: 3 };
     let _ = [ a; 5 ];
-    //~^ ERROR the trait `core::markers::Copy` is not implemented for the type `Foo`
+    //~^ ERROR the trait `core::marker::Copy` is not implemented for the type `Foo`
 }
diff --git a/src/test/compile-fail/static-items-cant-move.rs b/src/test/compile-fail/static-items-cant-move.rs
index e0f241f87a7..14ad1b3041f 100644
--- a/src/test/compile-fail/static-items-cant-move.rs
+++ b/src/test/compile-fail/static-items-cant-move.rs
@@ -10,14 +10,14 @@
 
 // Verifies that static items can't be moved
 
-use std::markers;
+use std::marker;
 
 struct Foo {
     foo: int,
-    nocopy: markers::NoCopy
+    nocopy: marker::NoCopy
 }
 
-static BAR: Foo = Foo{foo: 5, nocopy: markers::NoCopy};
+static BAR: Foo = Foo{foo: 5, nocopy: marker::NoCopy};
 
 
 fn test(f: Foo) {
diff --git a/src/test/compile-fail/syntax-trait-polarity-feature-gate.rs b/src/test/compile-fail/syntax-trait-polarity-feature-gate.rs
index 186f5f91eee..a7ca5e3bf09 100644
--- a/src/test/compile-fail/syntax-trait-polarity-feature-gate.rs
+++ b/src/test/compile-fail/syntax-trait-polarity-feature-gate.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers::Send;
+use std::marker::Send;
 
 struct TestType;
 
diff --git a/src/test/compile-fail/syntax-trait-polarity.rs b/src/test/compile-fail/syntax-trait-polarity.rs
index bdfadcad2bf..1ab79f5c80e 100644
--- a/src/test/compile-fail/syntax-trait-polarity.rs
+++ b/src/test/compile-fail/syntax-trait-polarity.rs
@@ -10,7 +10,7 @@
 
 #![feature(optin_builtin_traits)]
 
-use std::markers::Send;
+use std::marker::Send;
 
 struct TestType;
 
diff --git a/src/test/compile-fail/task-rng-isnt-sendable.rs b/src/test/compile-fail/task-rng-isnt-sendable.rs
index 5bc96cae0bb..fe31d81983e 100644
--- a/src/test/compile-fail/task-rng-isnt-sendable.rs
+++ b/src/test/compile-fail/task-rng-isnt-sendable.rs
@@ -16,6 +16,6 @@ fn test_send<S: Send>() {}
 
 pub fn main() {
     test_send::<rand::ThreadRng>();
-    //~^ ERROR `core::markers::Send` is not implemented
-    //~^^ ERROR `core::markers::Send` is not implemented
+    //~^ ERROR `core::marker::Send` is not implemented
+    //~^^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/trait-bounds-not-on-bare-trait.rs b/src/test/compile-fail/trait-bounds-not-on-bare-trait.rs
index f569bed126d..434d803d718 100644
--- a/src/test/compile-fail/trait-bounds-not-on-bare-trait.rs
+++ b/src/test/compile-fail/trait-bounds-not-on-bare-trait.rs
@@ -14,7 +14,7 @@ trait Foo {
 // This should emit the less confusing error, not the more confusing one.
 
 fn foo(_x: Foo + Send) {
-    //~^ERROR the trait `core::markers::Sized` is not implemented
+    //~^ERROR the trait `core::marker::Sized` is not implemented
 }
 
 fn main() { }
diff --git a/src/test/compile-fail/typeck-unsafe-always-share.rs b/src/test/compile-fail/typeck-unsafe-always-share.rs
index d3199ff982e..5166a4e9654 100644
--- a/src/test/compile-fail/typeck-unsafe-always-share.rs
+++ b/src/test/compile-fail/typeck-unsafe-always-share.rs
@@ -13,14 +13,14 @@
 // ignore-tidy-linelength
 
 use std::cell::UnsafeCell;
-use std::markers;
+use std::marker;
 
 struct MySync<T> {
     u: UnsafeCell<T>
 }
 
 struct NoSync {
-    m: markers::NoSync
+    m: marker::NoSync
 }
 
 fn test<T: Sync>(s: T){
@@ -30,17 +30,17 @@ fn test<T: Sync>(s: T){
 fn main() {
     let us = UnsafeCell::new(MySync{u: UnsafeCell::new(0i)});
     test(us);
-    //~^ ERROR `core::markers::Sync` is not implemented
+    //~^ ERROR `core::marker::Sync` is not implemented
 
-    let uns = UnsafeCell::new(NoSync{m: markers::NoSync});
+    let uns = UnsafeCell::new(NoSync{m: marker::NoSync});
     test(uns);
-    //~^ ERROR `core::markers::Sync` is not implemented
+    //~^ ERROR `core::marker::Sync` is not implemented
 
     let ms = MySync{u: uns};
     test(ms);
-    //~^ ERROR `core::markers::Sync` is not implemented
+    //~^ ERROR `core::marker::Sync` is not implemented
 
-    let ns = NoSync{m: markers::NoSync};
+    let ns = NoSync{m: marker::NoSync};
     test(ns);
-    //~^ ERROR `core::markers::Sync` is not implemented
+    //~^ ERROR `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/unboxed-closure-sugar-region.rs b/src/test/compile-fail/unboxed-closure-sugar-region.rs
index ee7d2cc168c..e0783b09cbd 100644
--- a/src/test/compile-fail/unboxed-closure-sugar-region.rs
+++ b/src/test/compile-fail/unboxed-closure-sugar-region.rs
@@ -15,7 +15,7 @@
 #![feature(unboxed_closures)]
 #![allow(dead_code)]
 
-use std::markers;
+use std::marker;
 
 trait Foo<'a,T,U> {
     fn dummy(&'a self) -> &'a (T,U);
diff --git a/src/test/compile-fail/unique-unique-kind.rs b/src/test/compile-fail/unique-unique-kind.rs
index 98d8b2d36cd..49cebbf5255 100644
--- a/src/test/compile-fail/unique-unique-kind.rs
+++ b/src/test/compile-fail/unique-unique-kind.rs
@@ -17,6 +17,6 @@ fn f<T:Send>(_i: T) {
 fn main() {
     let i = box Rc::new(100i);
     f(i);
-    //~^ ERROR `core::markers::Send` is not implemented
-    //~^^ ERROR `core::markers::Send` is not implemented
+    //~^ ERROR `core::marker::Send` is not implemented
+    //~^^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/unsendable-class.rs b/src/test/compile-fail/unsendable-class.rs
index 6398623e75b..96f36af53aa 100644
--- a/src/test/compile-fail/unsendable-class.rs
+++ b/src/test/compile-fail/unsendable-class.rs
@@ -30,7 +30,7 @@ fn foo(i:int, j: Rc<String>) -> foo {
 fn main() {
   let cat = "kitty".to_string();
   let (tx, _) = channel();
-  //~^ ERROR `core::markers::Send` is not implemented
-  //~^^ ERROR `core::markers::Send` is not implemented
+  //~^ ERROR `core::marker::Send` is not implemented
+  //~^^ ERROR `core::marker::Send` is not implemented
   tx.send(foo(42, Rc::new(cat)));
 }
diff --git a/src/test/compile-fail/unsized-bare-typaram.rs b/src/test/compile-fail/unsized-bare-typaram.rs
index b6078cd3af4..e28c082c80c 100644
--- a/src/test/compile-fail/unsized-bare-typaram.rs
+++ b/src/test/compile-fail/unsized-bare-typaram.rs
@@ -9,5 +9,5 @@
 // except according to those terms.
 
 fn bar<T: Sized>() { }
-fn foo<T: ?Sized>() { bar::<T>() } //~ ERROR the trait `core::markers::Sized` is not implemented
+fn foo<T: ?Sized>() { bar::<T>() } //~ ERROR the trait `core::marker::Sized` is not implemented
 fn main() { }
diff --git a/src/test/compile-fail/unsized-enum.rs b/src/test/compile-fail/unsized-enum.rs
index a78ffb13408..df961978086 100644
--- a/src/test/compile-fail/unsized-enum.rs
+++ b/src/test/compile-fail/unsized-enum.rs
@@ -15,14 +15,14 @@ fn not_sized<T: ?Sized>() { }
 enum Foo<U> { FooSome(U), FooNone }
 fn foo1<T>() { not_sized::<Foo<T>>() } // Hunky dory.
 fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
-//~^ ERROR the trait `core::markers::Sized` is not implemented
+//~^ ERROR the trait `core::marker::Sized` is not implemented
 //
 // Not OK: `T` is not sized.
 
 enum Bar<U: ?Sized> { BarSome(U), BarNone }
 fn bar1<T: ?Sized>() { not_sized::<Bar<T>>() }
 fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
-//~^ ERROR the trait `core::markers::Sized` is not implemented
+//~^ ERROR the trait `core::marker::Sized` is not implemented
 //
 // Not OK: `Bar<T>` is not sized, but it should be.
 
diff --git a/src/test/compile-fail/unsized-struct.rs b/src/test/compile-fail/unsized-struct.rs
index c6812679155..7b9fc2b468b 100644
--- a/src/test/compile-fail/unsized-struct.rs
+++ b/src/test/compile-fail/unsized-struct.rs
@@ -15,14 +15,14 @@ fn not_sized<T: ?Sized>() { }
 struct Foo<T> { data: T }
 fn foo1<T>() { not_sized::<Foo<T>>() } // Hunky dory.
 fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
-//~^ ERROR the trait `core::markers::Sized` is not implemented
+//~^ ERROR the trait `core::marker::Sized` is not implemented
 //
 // Not OK: `T` is not sized.
 
 struct Bar<T: ?Sized> { data: T }
 fn bar1<T: ?Sized>() { not_sized::<Bar<T>>() }
 fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
-//~^ ERROR the trait `core::markers::Sized` is not implemented
+//~^ ERROR the trait `core::marker::Sized` is not implemented
 //
 // Not OK: `Bar<T>` is not sized, but it should be.
 
diff --git a/src/test/compile-fail/unsized-trait-impl-trait-arg.rs b/src/test/compile-fail/unsized-trait-impl-trait-arg.rs
index 9a29775f7c9..ac8043d6852 100644
--- a/src/test/compile-fail/unsized-trait-impl-trait-arg.rs
+++ b/src/test/compile-fail/unsized-trait-impl-trait-arg.rs
@@ -15,7 +15,7 @@ trait T2<Z> {
 }
 struct S4<Y: ?Sized>;
 impl<X: ?Sized> T2<X> for S4<X> {
-    //~^ ERROR `core::markers::Sized` is not implemented for the type `X`
+    //~^ ERROR `core::marker::Sized` is not implemented for the type `X`
 }
 
 fn main() { }
diff --git a/src/test/compile-fail/unsized3.rs b/src/test/compile-fail/unsized3.rs
index 7e4a1d13557..2d330654881 100644
--- a/src/test/compile-fail/unsized3.rs
+++ b/src/test/compile-fail/unsized3.rs
@@ -14,7 +14,7 @@
 // Unbounded.
 fn f1<X: ?Sized>(x: &X) {
     f2::<X>(x);
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
 fn f2<X>(x: &X) {
 }
@@ -23,7 +23,7 @@ fn f2<X>(x: &X) {
 trait T {}
 fn f3<X: ?Sized + T>(x: &X) {
     f4::<X>(x);
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
 fn f4<X: T>(x: &X) {
 }
@@ -37,7 +37,7 @@ fn f5<Y>(x: &Y) {}
 fn f6<X: ?Sized>(x: &X) {}
 fn f7<X: ?Sized>(x1: &E<X>, x2: &E<X>) {
     f5(x1);
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
     f6(x2); // ok
 }
 
@@ -49,19 +49,19 @@ struct S<X: ?Sized> {
 
 fn f8<X: ?Sized>(x1: &S<X>, x2: &S<X>) {
     f5(x1);
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
     f6(x2); // ok
 }
 
 // Test some tuples.
 fn f9<X: ?Sized>(x1: Box<S<X>>, x2: Box<E<X>>) {
     f5(&(*x1, 34i));
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
 
 fn f10<X: ?Sized>(x1: Box<S<X>>, x2: Box<E<X>>) {
     f5(&(32i, *x2));
-    //~^ ERROR the trait `core::markers::Sized` is not implemented
+    //~^ ERROR the trait `core::marker::Sized` is not implemented
 }
 
 pub fn main() {
diff --git a/src/test/compile-fail/unsized5.rs b/src/test/compile-fail/unsized5.rs
index a714b7d9238..026d496aa43 100644
--- a/src/test/compile-fail/unsized5.rs
+++ b/src/test/compile-fail/unsized5.rs
@@ -11,27 +11,27 @@
 // Test `?Sized` types not allowed in fields (except the last one).
 
 struct S1<X: ?Sized> {
-    f1: X, //~ ERROR `core::markers::Sized` is not implemented
+    f1: X, //~ ERROR `core::marker::Sized` is not implemented
     f2: int,
 }
 struct S2<X: ?Sized> {
     f: int,
-    g: X, //~ ERROR `core::markers::Sized` is not implemented
+    g: X, //~ ERROR `core::marker::Sized` is not implemented
     h: int,
 }
 struct S3 {
-    f: str, //~ ERROR `core::markers::Sized` is not implemented
+    f: str, //~ ERROR `core::marker::Sized` is not implemented
     g: [uint]
 }
 struct S4 {
-    f: str, //~ ERROR `core::markers::Sized` is not implemented
+    f: str, //~ ERROR `core::marker::Sized` is not implemented
     g: uint
 }
 enum E<X: ?Sized> {
-    V1(X, int), //~ERROR `core::markers::Sized` is not implemented
+    V1(X, int), //~ERROR `core::marker::Sized` is not implemented
 }
 enum F<X: ?Sized> {
-    V2{f1: X, f: int}, //~ERROR `core::markers::Sized` is not implemented
+    V2{f1: X, f: int}, //~ERROR `core::marker::Sized` is not implemented
 }
 
 pub fn main() {
diff --git a/src/test/compile-fail/unsized6.rs b/src/test/compile-fail/unsized6.rs
index d3b03493fdc..02f3404b72b 100644
--- a/src/test/compile-fail/unsized6.rs
+++ b/src/test/compile-fail/unsized6.rs
@@ -16,27 +16,27 @@ trait T {}
 fn f1<X: ?Sized>(x: &X) {
     let _: X; // <-- this is OK, no bindings created, no initializer.
     let _: (int, (X, int)); // same
-    let y: X; //~ERROR the trait `core::markers::Sized` is not implemented
-    let y: (int, (X, int)); //~ERROR the trait `core::markers::Sized` is not implemented
+    let y: X; //~ERROR the trait `core::marker::Sized` is not implemented
+    let y: (int, (X, int)); //~ERROR the trait `core::marker::Sized` is not implemented
 }
 fn f2<X: ?Sized + T>(x: &X) {
-    let y: X; //~ERROR the trait `core::markers::Sized` is not implemented
-    let y: (int, (X, int)); //~ERROR the trait `core::markers::Sized` is not implemented
+    let y: X; //~ERROR the trait `core::marker::Sized` is not implemented
+    let y: (int, (X, int)); //~ERROR the trait `core::marker::Sized` is not implemented
 }
 
 fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
-    let y: X = *x1; //~ERROR the trait `core::markers::Sized` is not implemented
-    let y = *x2; //~ERROR the trait `core::markers::Sized` is not implemented
-    let (y, z) = (*x3, 4i); //~ERROR the trait `core::markers::Sized` is not implemented
+    let y: X = *x1; //~ERROR the trait `core::marker::Sized` is not implemented
+    let y = *x2; //~ERROR the trait `core::marker::Sized` is not implemented
+    let (y, z) = (*x3, 4i); //~ERROR the trait `core::marker::Sized` is not implemented
 }
-fn f4<X: ?Sized: T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
-    let y: X = *x1;         //~ERROR the trait `core::markers::Sized` is not implemented
-    let y = *x2;            //~ERROR the trait `core::markers::Sized` is not implemented
-    let (y, z) = (*x3, 4i); //~ERROR the trait `core::markers::Sized` is not implemented
+fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
+    let y: X = *x1;         //~ERROR the trait `core::marker::Sized` is not implemented
+    let y = *x2;            //~ERROR the trait `core::marker::Sized` is not implemented
+    let (y, z) = (*x3, 4i); //~ERROR the trait `core::marker::Sized` is not implemented
 }
 
-fn g1<X: ?Sized>(x: X) {} //~ERROR the trait `core::markers::Sized` is not implemented
-fn g2<X: ?Sized + T>(x: X) {} //~ERROR the trait `core::markers::Sized` is not implemented
+fn g1<X: ?Sized>(x: X) {} //~ERROR the trait `core::marker::Sized` is not implemented
+fn g2<X: ?Sized + T>(x: X) {} //~ERROR the trait `core::marker::Sized` is not implemented
 
 pub fn main() {
 }
diff --git a/src/test/compile-fail/unsized7.rs b/src/test/compile-fail/unsized7.rs
index 32daa2a246e..6fc547c0b8e 100644
--- a/src/test/compile-fail/unsized7.rs
+++ b/src/test/compile-fail/unsized7.rs
@@ -18,7 +18,7 @@ trait T1<Z: T> {
 }
 struct S3<Y: ?Sized>;
 impl<X: ?Sized + T> T1<X> for S3<X> {
-    //~^ ERROR `core::markers::Sized` is not implemented for the type `X`
+    //~^ ERROR `core::marker::Sized` is not implemented for the type `X`
 }
 
 fn main() { }
diff --git a/src/test/compile-fail/where-clause-constraints-are-local-for-inherent-impl.rs b/src/test/compile-fail/where-clause-constraints-are-local-for-inherent-impl.rs
index c584c30448f..74342cfedd3 100644
--- a/src/test/compile-fail/where-clause-constraints-are-local-for-inherent-impl.rs
+++ b/src/test/compile-fail/where-clause-constraints-are-local-for-inherent-impl.rs
@@ -21,7 +21,7 @@ impl<T> Foo<T> {
 
     fn fails_copy(self) {
         require_copy(self.x);
-        //~^ ERROR the trait `core::markers::Copy` is not implemented for the type `T`
+        //~^ ERROR the trait `core::marker::Copy` is not implemented for the type `T`
     }
 }
 
diff --git a/src/test/compile-fail/where-clause-constraints-are-local-for-trait-impl.rs b/src/test/compile-fail/where-clause-constraints-are-local-for-trait-impl.rs
index 45df3af08d4..8e01e89b687 100644
--- a/src/test/compile-fail/where-clause-constraints-are-local-for-trait-impl.rs
+++ b/src/test/compile-fail/where-clause-constraints-are-local-for-trait-impl.rs
@@ -26,7 +26,7 @@ impl<T> Foo<T> for Bar<T> {
 
     fn fails_copy(self) {
         require_copy(self.x);
-        //~^ ERROR the trait `core::markers::Copy` is not implemented for the type `T`
+        //~^ ERROR the trait `core::marker::Copy` is not implemented for the type `T`
     }
 }
 
diff --git a/src/test/run-pass/associated-types-impl-redirect.rs b/src/test/run-pass/associated-types-impl-redirect.rs
index d18d6ffd7d0..d9d11c95adb 100644
--- a/src/test/run-pass/associated-types-impl-redirect.rs
+++ b/src/test/run-pass/associated-types-impl-redirect.rs
@@ -19,7 +19,7 @@
 #![feature(lang_items, unboxed_closures)]
 #![no_implicit_prelude]
 
-use std::markers::Sized;
+use std::marker::Sized;
 use std::option::Option::{None, Some, self};
 
 trait Iterator {
diff --git a/src/test/run-pass/associated-types-where-clause-impl-ambiguity.rs b/src/test/run-pass/associated-types-where-clause-impl-ambiguity.rs
index 4ebf071cbc1..4152321cab8 100644
--- a/src/test/run-pass/associated-types-where-clause-impl-ambiguity.rs
+++ b/src/test/run-pass/associated-types-where-clause-impl-ambiguity.rs
@@ -19,7 +19,7 @@
 #![feature(lang_items, unboxed_closures)]
 #![no_implicit_prelude]
 
-use std::markers::Sized;
+use std::marker::Sized;
 use std::option::Option::{None, Some, self};
 
 trait Iterator {
diff --git a/src/test/run-pass/const-block.rs b/src/test/run-pass/const-block.rs
index 9ec68264076..84acd3c4ecd 100644
--- a/src/test/run-pass/const-block.rs
+++ b/src/test/run-pass/const-block.rs
@@ -11,7 +11,7 @@
 #![allow(dead_code)]
 #![allow(unused_unsafe)]
 
-use std::markers::Sync;
+use std::marker::Sync;
 
 struct Foo {
     a: uint,
diff --git a/src/test/run-pass/fsu-moves-and-copies.rs b/src/test/run-pass/fsu-moves-and-copies.rs
index 5ce8eb64318..a08cd33362f 100644
--- a/src/test/run-pass/fsu-moves-and-copies.rs
+++ b/src/test/run-pass/fsu-moves-and-copies.rs
@@ -11,7 +11,7 @@
 // Issue 4691: Ensure that functional-struct-updates operates
 // correctly and moves rather than copy when appropriate.
 
-use std::markers::NoCopy as NP;
+use std::marker::NoCopy as NP;
 
 struct ncint { np: NP, v: int }
 fn ncint(v: int) -> ncint { ncint { np: NP, v: v } }
diff --git a/src/test/run-pass/hrtb-opt-in-copy.rs b/src/test/run-pass/hrtb-opt-in-copy.rs
index e364cb0c9a2..8eaf8427bfd 100644
--- a/src/test/run-pass/hrtb-opt-in-copy.rs
+++ b/src/test/run-pass/hrtb-opt-in-copy.rs
@@ -18,7 +18,7 @@
 
 #![allow(dead_code)]
 
-use std::markers;
+use std::marker;
 
 #[derive(Copy)]
 struct Foo<T> { x: T }
@@ -26,7 +26,7 @@ struct Foo<T> { x: T }
 type Ty<'tcx> = &'tcx TyS<'tcx>;
 
 enum TyS<'tcx> {
-    Boop(markers::InvariantLifetime<'tcx>)
+    Boop(marker::InvariantLifetime<'tcx>)
 }
 
 enum Bar<'tcx> {
diff --git a/src/test/run-pass/issue-17718-static-unsafe-interior.rs b/src/test/run-pass/issue-17718-static-unsafe-interior.rs
index ac9a70379f8..cdd03244df1 100644
--- a/src/test/run-pass/issue-17718-static-unsafe-interior.rs
+++ b/src/test/run-pass/issue-17718-static-unsafe-interior.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::markers;
+use std::marker;
 use std::cell::UnsafeCell;
 
 struct MyUnsafePack<T>(UnsafeCell<T>);
diff --git a/src/test/run-pass/issue-2718.rs b/src/test/run-pass/issue-2718.rs
index 435b1699883..3ca3e0592e7 100644
--- a/src/test/run-pass/issue-2718.rs
+++ b/src/test/run-pass/issue-2718.rs
@@ -23,7 +23,7 @@ pub mod pipes {
     use std::mem::{replace, swap};
     use std::mem;
     use std::thread::Thread;
-    use std::markers::Send;
+    use std::marker::Send;
 
     pub struct Stuff<T> {
         state: state,
diff --git a/src/test/run-pass/method-recursive-blanket-impl.rs b/src/test/run-pass/method-recursive-blanket-impl.rs
index 279f05ea1c9..338bd89ab5c 100644
--- a/src/test/run-pass/method-recursive-blanket-impl.rs
+++ b/src/test/run-pass/method-recursive-blanket-impl.rs
@@ -13,7 +13,7 @@
 // know not to stop at the blanket, we have to recursively evaluate
 // the `T:Foo` bound.
 
-use std::markers::Sized;
+use std::marker::Sized;
 
 // Note: this must be generic for the problem to show up
 trait Foo<A> {
diff --git a/src/test/run-pass/regions-infer-bivariance.rs b/src/test/run-pass/regions-infer-bivariance.rs
index a750b3f4b4e..a3288e2e1b9 100644
--- a/src/test/run-pass/regions-infer-bivariance.rs
+++ b/src/test/run-pass/regions-infer-bivariance.rs
@@ -11,7 +11,7 @@
 // Test that a type whose lifetime parameters is never used is
 // inferred to be bivariant.
 
-use std::markers;
+use std::marker;
 
 struct Bivariant<'a>;
 
diff --git a/src/test/run-pass/syntax-trait-polarity.rs b/src/test/run-pass/syntax-trait-polarity.rs
index 244e084e65b..a91e5da1537 100644
--- a/src/test/run-pass/syntax-trait-polarity.rs
+++ b/src/test/run-pass/syntax-trait-polarity.rs
@@ -10,7 +10,7 @@
 
 #![feature(optin_builtin_traits)]
 
-use std::markers::Send;
+use std::marker::Send;
 
 struct TestType;