Stabilize core::io::{Error(Kind), IoSlice(Mut), Result}

library/core/src/io/mod.rs

@@ -23,8 +23,6 @@ pub use self::error::const_error;
 #[unstable(feature = "core_io", issue = "154046")]
 pub use self::{
     cursor::Cursor,
-    error::{Error, ErrorKind, Result},
-    io_slice::{IoSlice, IoSliceMut},
     seek::{Seek, SeekFrom},
     util::{Chain, Empty, Repeat, Sink, Take, empty, repeat, sink},
     write::Write,
@@ -42,6 +40,11 @@ pub use self::{
     util::{chain, take},
     write::default_write_vectored,
 };
+#[stable(feature = "core_io_fundamentals", since = "CURRENT_RUSTC_VERSION")]
+pub use self::{
+    error::{Error, ErrorKind, Result},
+    io_slice::{IoSlice, IoSliceMut},
+};
 
 /// Marks that a type `T` can have IO traits such as [`Seek`], [`Write`], etc. automatically
 /// implemented for handle types like [`Arc`][arc] as well.

library/core/src/lib.rs

@@ -293,7 +293,7 @@ pub mod bstr;
 pub mod cell;
 pub mod char;
 pub mod ffi;
-#[unstable(feature = "core_io", issue = "154046")]
+#[stable(feature = "core_io_fundamentals", since = "CURRENT_RUSTC_VERSION")]
 pub mod io;
 pub mod iter;
 pub mod net;

library/coretests/tests/lib.rs

@@ -37,7 +37,6 @@
 #![feature(const_unsigned_bigint_helpers)]
 #![feature(core_intrinsics)]
 #![feature(core_intrinsics_fallbacks)]
-#![feature(core_io)]
 #![feature(core_io_borrowed_buf)]
 #![feature(core_private_bignum)]
 #![feature(core_private_diy_float)]