Auto merge of #26914 - alexcrichton:deprecate-easy, r=aturon

Many of these have long since reached their stage of being obsolete, so this
commit starts the removal process for all of them. The unstable features that
were deprecated are:

* box_heap
* cmp_partial
* fs_time
* hash_default
* int_slice
* iter_min_max
* iter_reset_fuse
* iter_to_vec
* map_in_place
* move_from
* owned_ascii_ext
* page_size
* read_and_zero
* scan_state
* slice_chars
* slice_position_elem
* subslice_offset

1 files changed, 3 insertions, 0 deletions

diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index acf22094233..05910a3529d 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -86,10 +86,13 @@ use core::raw::{TraitObject};
 #[lang = "exchange_heap"]
 #[unstable(feature = "box_heap",
            reason = "may be renamed; uncertain about custom allocator design")]
+#[allow(deprecated)]
 pub const HEAP: ExchangeHeapSingleton =
     ExchangeHeapSingleton { _force_singleton: () };
 
 /// This the singleton type used solely for `boxed::HEAP`.
+#[unstable(feature = "box_heap",
+           reason = "may be renamed; uncertain about custom allocator design")]
 #[derive(Copy, Clone)]
 pub struct ExchangeHeapSingleton { _force_singleton: () }