Skip to content

Release notes for 1.9 #32892

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Apr 14, 2016
Merged

Release notes for 1.9 #32892

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
288 changes: 288 additions & 0 deletions RELEASES.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,3 +1,291 @@
Version 1.9.0 (2016-05-26)
==========================

Language
--------

* The `#[deprecated]` attribute when applied to an API will generate
warnings when used. The warnings may be suppressed with
`#[allow(deprecated)]`. [RFC 1270].
* [`fn` item types are zero sized, and each `fn` names a unique
type][1.9fn]. This will break code that transmutes `fn`s, so calling
`transmute` on a `fn` type will generate a warning for a few cycles,
then will be converted to an error.
* [Field and method resolution understand visibility, so private
fields and methods cannot prevent the proper use of public fields
and methods][1.9fv].
* [The parser considers unicode codepoints in the
`PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].

Stabilized APIs
---------------

* [`std::panic`]
* [`std::panic::catch_unwind`][] (renamed from `recover`)
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Bad links?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

These renames didn't actually exist on master yet when I was writing the notes, and still haven't been published in a nightly.

* [`std::panic::resume_unwind`][] (renamed from `propagate`)
* [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
* [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
* [`str::is_char_boundary`]
* [`<*const T>::as_ref`]
* [`<*mut T>::as_ref`]
* [`<*mut T>::as_mut`]
* [`AsciiExt::make_ascii_uppercase`]
* [`AsciiExt::make_ascii_lowercase`]
* [`char::decode_utf16`]
* [`char::DecodeUtf16`]
* [`char::DecodeUtf16Error`]
* [`char::DecodeUtf16Error::unpaired_surrogate`]
* [`BTreeSet::take`]
* [`BTreeSet::replace`]
* [`BTreeSet::get`]
* [`HashSet::take`]
* [`HashSet::replace`]
* [`HashSet::get`]
* [`OsString::with_capacity`]
* [`OsString::clear`]
* [`OsString::capacity`]
* [`OsString::reserve`]
* [`OsString::reserve_exact`]
* [`OsStr::is_empty`]
* [`OsStr::len`]
* [`std::os::unix::thread`]
* [`RawPthread`]
* [`JoinHandleExt`]
* [`JoinHandleExt::as_pthread_t`]
* [`JoinHandleExt::into_pthread_t`]
* [`HashSet::hasher`]
* [`HashMap::hasher`]
* [`CommandExt::exec`]
* [`File::try_clone`]
* [`SocketAddr::set_ip`]
* [`SocketAddr::set_port`]
* [`SocketAddrV4::set_ip`]
* [`SocketAddrV4::set_port`]
* [`SocketAddrV6::set_ip`]
* [`SocketAddrV6::set_port`]
* [`SocketAddrV6::set_flowinfo`]
* [`SocketAddrV6::set_scope_id`]
* [`slice::copy_from_slice`]
* [`ptr::read_volatile`]
* [`ptr::write_volatile`]
* [`OpenOptions::create_new`]
* [`TcpStream::set_nodelay`]
* [`TcpStream::nodelay`]
* [`TcpStream::set_ttl`]
* [`TcpStream::ttl`]
* [`TcpStream::set_only_v6`]
* [`TcpStream::only_v6`]
* [`TcpStream::take_error`]
* [`TcpStream::set_nonblocking`]
* [`TcpListener::set_ttl`]
* [`TcpListener::ttl`]
* [`TcpListener::set_only_v6`]
* [`TcpListener::only_v6`]
* [`TcpListener::take_error`]
* [`TcpListener::set_nonblocking`]
* [`UdpSocket::set_broadcast`]
* [`UdpSocket::broadcast`]
* [`UdpSocket::set_multicast_loop_v4`]
* [`UdpSocket::multicast_loop_v4`]
* [`UdpSocket::set_multicast_ttl_v4`]
* [`UdpSocket::multicast_ttl_v4`]
* [`UdpSocket::set_multicast_loop_v6`]
* [`UdpSocket::multicast_loop_v6`]
* [`UdpSocket::set_multicast_ttl_v6`]
* [`UdpSocket::multicast_ttl_v6`]
* [`UdpSocket::set_ttl`]
* [`UdpSocket::ttl`]
* [`UdpSocket::set_only_v6`]
* [`UdpSocket::only_v6`]
* [`UdpSocket::join_multicast_v4`]
* [`UdpSocket::join_multicast_v6`]
* [`UdpSocket::leave_multicast_v4`]
* [`UdpSocket::leave_multicast_v6`]
* [`UdpSocket::take_error`]
* [`UdpSocket::connect`]
* [`UdpSocket::send`]
* [`UdpSocket::recv`]
* [`UdpSocket::set_nonblocking`]

Libraries
---------

* [`std::sync::Once` is poisoned if its initialization function
fails][1.9o].
* [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
* [Most types implement `fmt::Debug`][1.9db].
Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Bad link.

* [The default buffer size used by `BufReader` and `BufWriter` was
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

It's also used in some other places like io::copy. Not sure if it's worth mentioning, though.

reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
used by other languages.
* [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
`Duration` additionally implements `*=` and `/=`][1.9ta].
* [`Skip` is a `DoubleEndedIterator`][1.9sk].
* [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
* [`Chain` implements `BufRead`][1.9ch].
* [`HashMap`, `HashSet` and iterators are covariant][1.9hc].

Cargo
-----

* [Cargo can now run concurrently][1.9cc].
* [Top-level overrides allow specific revisions of crates to be
overridden through the entire crate graph][1.9ct]. This is intended
to make upgrades easier for large projects, by allowing crates to be
forked temporarily until they've been upgraded and republished.
* [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
* [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
on the commandline][1.9cf]. `rustc` arguments can also be specified
in the `build.rustflags` configuration key.

Performance
-----------

* [During type unification, the complexity of comparing variables for
equivalance was reduced from `O(n!)` to `O(n)`][1.9tu]. This leads
to major compile-time improvements in some scenarios.
* [`ToString` is specialized for `str`, giving it the same performance
as `to_owned`][1.9ts].
* [Spawning processes with `Command::output` no longer creates extra
threads][1.9sp].
* [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
for C-like enums][1.9cl].

Misc
----

* [Passing the `--quiet` flag to a test runner will produce
much-abbreviated output][1.9q].
* The Rust Project now publishes std binaries for the
`mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
`i586-pc-windows-msvc` targets.

Compatibility Notes
-------------------

* [`std::sync::Once` is poisoned if its initialization function
fails][1.9o].
* [It is illegal to define methods with the same name in overlapping
inherent `impl` blocks][1.9sn].
* [`fn` item types are zero sized, and each `fn` names a unique
type][1.9fn]. This will break code that transmutes `fn`s, so calling
`transmute` on a `fn` type will generate a warning for a few cycles,
then will be converted to an error.
* [Improvements to const evaluation may trigger new errors when integer
literals are out of range][1.9ce].


[1.9bf]: https://github.com/rust-lang/rust/pull/32695
[1.9cc]: https://github.com/rust-lang/cargo/pull/2486
[1.9ce]: https://github.com/rust-lang/rust/pull/30587
[1.9cf]: https://github.com/rust-lang/cargo/pull/2241
[1.9ch]: https://github.com/rust-lang/rust/pull/32541
[1.9cl]: https://github.com/rust-lang/rust/pull/31977
[1.9cp]: https://github.com/rust-lang/cargo/pull/2465
[1.9ct]: https://github.com/rust-lang/cargo/pull/2385
[1.9cu]: https://github.com/rust-lang/rust/pull/32652
[1.9db]: https://github.com/rust-lang/rust/pull/32054
[1.9fi]: https://github.com/rust-lang/rust/pull/32050
[1.9fn]: https://github.com/rust-lang/rust/pull/31710
[1.9fv]: https://github.com/rust-lang/rust/pull/31938
[1.9hc]: https://github.com/rust-lang/rust/pull/32635
[1.9o]: https://github.com/rust-lang/rust/pull/32325
[1.9q]: https://github.com/rust-lang/rust/pull/31887
[1.9sk]: https://github.com/rust-lang/rust/pull/31700
[1.9sn]: https://github.com/rust-lang/rust/pull/31925
[1.9sp]: https://github.com/rust-lang/rust/pull/31618
[1.9ta]: https://github.com/rust-lang/rust/pull/32448
[1.9ts]: https://github.com/rust-lang/rust/pull/32586
[1.9tu]: https://github.com/rust-lang/rust/pull/32062
[1.9ws]: https://github.com/rust-lang/rust/pull/29734
[RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
[`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
[`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
[`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
[`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
[`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
[`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
[`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
[`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
[`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
[`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
[`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
[`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
[`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
[`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
[`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
[`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
[`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
[`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
[`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
[`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
[`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
[`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
[`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
[`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
[`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
[`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
[`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
[`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
[`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
[`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
[`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
[`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
[`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
[`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
[`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
[`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
[`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
[`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
[`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
[`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
[`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
[`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
[`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
[`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
[`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
[`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
[`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
[`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
[`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
[`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
[`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
[`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
[`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
[`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
[`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
[`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
[`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
[`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
[`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
[`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
[`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
[`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
[`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
[`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
[`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
[`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
[`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
[`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
[`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
[`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
[`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
[`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
[`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
[`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
[`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
[`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
[`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
[`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
[`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
[`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
[`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
[`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
[`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
[`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
[`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
[`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary


Version 1.8.0 (2016-04-14)
==========================

Expand Down