auto merge of #5180 : catamorphism/rust/post-snapshot, r=catamorphism

* Disallow structural records everywhere
* Remove all #[cfg(stage0)] stuff
* Remove the last deprecated modes in libcore
* Un-xfail a test

src/libcore/comm.rs

@@ -8,9 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// Transitional -- needs snapshot
-#[allow(structural_records)];
-
 use either::{Either, Left, Right};
 use kinds::Owned;
 use option;

src/libcore/core.rc

@@ -227,10 +227,6 @@ pub const debug : u32 = 4_u32;
 
 // The runtime interface used by the compiler
 #[cfg(notest)] pub mod rt;
-// The runtime and compiler interface to fmt!
-#[cfg(stage0)]
-#[path = "private/extfmt.rs"]
-pub mod extfmt;
 // Private APIs
 pub mod private;
 

src/libcore/pipes.rs

@@ -82,8 +82,6 @@ bounded and unbounded protocols allows for less code duplication.
 
 */
 
-#[allow(structural_records)]; // Macros -- needs another snapshot
-
 use cmp::Eq;
 use cast::{forget, reinterpret_cast, transmute};
 use cell::Cell;

src/libcore/private/finally.rs

@@ -26,33 +26,10 @@ do || {
 use ops::Drop;
 use task::{spawn, failing};
 
-#[cfg(stage0)]
-pub trait Finally<T> {
-    fn finally(&self, +dtor: &fn()) -> T;
-}
-
-#[cfg(stage1)]
-#[cfg(stage2)]
-#[cfg(stage3)]
 pub trait Finally<T> {
     fn finally(&self, dtor: &fn()) -> T;
 }
 
-#[cfg(stage0)]
-impl<T> Finally<T> for &fn() -> T {
-    // FIXME #4518: Should not require a mode here
-    fn finally(&self, +dtor: &fn()) -> T {
-        let _d = Finallyalizer {
-            dtor: dtor
-        };
-
-        (*self)()
-    }
-}
-
-#[cfg(stage1)]
-#[cfg(stage2)]
-#[cfg(stage3)]
 impl<T> Finally<T> for &fn() -> T {
     fn finally(&self, dtor: &fn()) -> T {
         let _d = Finallyalizer {

src/libcore/stackwalk.rs

@@ -10,9 +10,6 @@
 
 #[doc(hidden)]; // FIXME #3538
 
-#[legacy_modes]; // tjc: remove after snapshot
-#[allow(deprecated_mode)];
-
 use cast::reinterpret_cast;
 use ptr::offset;
 use sys::size_of;