3 files changed, 3 insertions, 12 deletions
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index 7e2ea492d4c..93c6f5bed85 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -57,7 +57,7 @@
        html_playground_url = "http://play.rust-lang.org/")]
 
 #![no_std]
-#![feature(globs, intrinsics, lang_items, macro_rules, managed_boxes, phase)]
+#![feature(globs, intrinsics, lang_items, macro_rules, phase)]
 #![feature(simd, unsafe_destructor)]
 #![deny(missing_doc)]
 
diff --git a/src/libcore/raw.rs b/src/libcore/raw.rs
index 86b96ff15f1..a62e2ecdca0 100644
--- a/src/libcore/raw.rs
+++ b/src/libcore/raw.rs
@@ -20,15 +20,6 @@
 
 use mem;
 
-/// The representation of `std::gc::Gc`.
-pub struct GcBox<T> {
-    pub ref_count: uint,
-    pub drop_glue: fn(ptr: *mut u8),
-    pub prev: *mut GcBox<T>,
-    pub next: *mut GcBox<T>,
-    pub data: T,
-}
-
 /// The representation of a Rust slice
 pub struct Slice<T> {
     pub data: *const T,
diff --git a/src/libcore/slice.rs b/src/libcore/slice.rs
index 1a00107a216..9f925f9d371 100644
--- a/src/libcore/slice.rs
+++ b/src/libcore/slice.rs
@@ -1218,7 +1218,7 @@ macro_rules! iterator {
 
 /// Immutable slice iterator
 #[experimental = "needs review"]
-pub struct Items<'a, T> {
+pub struct Items<'a, T: 'a> {
     ptr: *const T,
     end: *const T,
     marker: marker::ContravariantLifetime<'a>
@@ -1261,7 +1261,7 @@ impl<'a, T> RandomAccessIterator<&'a T> for Items<'a, T> {
 
 /// Mutable slice iterator.
 #[experimental = "needs review"]
-pub struct MutItems<'a, T> {
+pub struct MutItems<'a, T: 'a> {
     ptr: *mut T,
     end: *mut T,
     marker: marker::ContravariantLifetime<'a>,