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Release notes for 1.10.0
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‎RELEASES.md

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Version 1.10.0 (2016-07-07)
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===========================
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Language
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--------
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* [Allow `concat_idents!` in type positions as well as in expression
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positions]
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(https://github.com/rust-lang/rust/pull/33735).
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* [`Copy` types are required to have a trivial implementation of `Clone`]
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(https://github.com/rust-lang/rust/pull/33420).
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[RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
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* [Single-variant enums support the `#[repr(..)]` attribute]
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(https://github.com/rust-lang/rust/pull/33355).
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* [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods]
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(https://github.com/rust-lang/rust/pull/32908).
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* [`panic!` can be converted to a runtime abort with the
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`-C panic=abort` flag]
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(https://github.com/rust-lang/rust/pull/32900).
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[RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
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* [Add a new crate type, 'cdylib']
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(https://github.com/rust-lang/rust/pull/33553).
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cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
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[RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
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Note that Cargo does not yet directly support cdylibs.
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Stabilized APIs
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---------------
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* `os::windows::fs::OpenOptionsExt::access_mode`
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* `os::windows::fs::OpenOptionsExt::share_mode`
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* `os::windows::fs::OpenOptionsExt::custom_flags`
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* `os::windows::fs::OpenOptionsExt::attributes`
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* `os::windows::fs::OpenOptionsExt::security_qos_flags`
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* `os::unix::fs::OpenOptionsExt::custom_flags`
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* [`sync::Weak::new`]
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(http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
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* `Default for sync::Weak`
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* [`panic::set_hook`]
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(http://doc.rust-lang.org/std/panic/fn.set_hook.html)
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* [`panic::take_hook`]
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(http://doc.rust-lang.org/std/panic/fn.take_hook.html)
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* [`panic::PanicInfo`]
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(http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
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* [`panic::PanicInfo::payload`]
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(http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
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* [`panic::PanicInfo::location`]
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(http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
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* [`panic::Location`]
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(http://doc.rust-lang.org/std/panic/struct.Location.html)
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* [`panic::Location::file`]
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(http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
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* [`panic::Location::line`]
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(http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
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* [`ffi::CStr::from_bytes_with_nul`]
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(http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
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* [`ffi::CStr::from_bytes_with_nul_unchecked`]
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(http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
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* [`ffi::FromBytesWithNulError`]
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(http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
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* [`fs::Metadata::modified`]
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(http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
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* [`fs::Metadata::accessed`]
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(http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
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* [`fs::Metadata::created`]
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(http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
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* `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
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* `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
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* `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
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* `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
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* [`SocketAddr::is_unnamed`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
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* [`SocketAddr::as_pathname`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
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* [`UnixStream::connect`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
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* [`UnixStream::pair`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
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* [`UnixStream::try_clone`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
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* [`UnixStream::local_addr`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
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* [`UnixStream::peer_addr`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
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* [`UnixStream::set_read_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
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* [`UnixStream::set_write_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
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* [`UnixStream::read_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
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* [`UnixStream::write_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
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* [`UnixStream::set_nonblocking`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
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* [`UnixStream::take_error`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
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* [`UnixStream::shutdown`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
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* Read/Write/RawFd impls for `UnixStream`
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* [`UnixListener::bind`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
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* [`UnixListener::accept`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
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* [`UnixListener::try_clone`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
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* [`UnixListener::local_addr`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
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* [`UnixListener::set_nonblocking`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
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* [`UnixListener::take_error`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
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* [`UnixListener::incoming`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
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* RawFd impls for `UnixListener`
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* [`UnixDatagram::bind`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
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* [`UnixDatagram::unbound`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
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* [`UnixDatagram::pair`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
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* [`UnixDatagram::connect`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
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* [`UnixDatagram::try_clone`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
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* [`UnixDatagram::local_addr`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
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* [`UnixDatagram::peer_addr`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
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* [`UnixDatagram::recv_from`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
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* [`UnixDatagram::recv`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
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* [`UnixDatagram::send_to`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
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* [`UnixDatagram::send`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
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* [`UnixDatagram::set_read_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
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* [`UnixDatagram::set_write_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
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* [`UnixDatagram::read_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
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* [`UnixDatagram::write_timeout`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
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* [`UnixDatagram::set_nonblocking`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
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* [`UnixDatagram::take_error`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
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* [`UnixDatagram::shutdown`]
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(http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
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* RawFd impls for `UnixDatagram`
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* `{BTree,Hash}Map::values_mut`
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* [`<[_]>::binary_search_by_key`]
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(http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
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Libraries
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---------
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* [The `abs_sub` method of floats is deprecated]
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(https://github.com/rust-lang/rust/pull/33664).
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The semantics of this minor method are subtle and probably not what
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most people want.
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* [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord]
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(https://github.com/rust-lang/rust/pull/33306).
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* [On Linux, if `HashMap`s can't be initialized with `getrandom` they
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will fall back to `/dev/urandom` temporarily to avoid blocking
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during early boot]
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(https://github.com/rust-lang/rust/pull/33086).
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* [Implemented negation for wrapping numerals]
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(https://github.com/rust-lang/rust/pull/33067).
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* [Implement `Clone` for `binary_heap::IntoIter`]
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(https://github.com/rust-lang/rust/pull/33050).
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* [Implement `Display` and `Hash` for `std::num::Wrapping`]
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(https://github.com/rust-lang/rust/pull/33023).
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* [Add `Default` implementation for `&CStr`, `CString`, `Path`]
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(https://github.com/rust-lang/rust/pull/32990).
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* [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`]
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(https://github.com/rust-lang/rust/pull/32866).
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* [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
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`Mutex`, `RwLock`]
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(https://github.com/rust-lang/rust/pull/32785).
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Cargo
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-----
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* [Cargo.toml supports the `profile.*.panic` option]
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(https://github.com/rust-lang/cargo/pull/2687).
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This controls the runtime behavior of the `panic!` macro
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and can be either "unwind" (the default), or "abort".
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[RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
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* [Don't throw away errors with `-p` arguments]
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(https://github.com/rust-lang/cargo/pull/2723).
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* [Report status to stderr instead of stdout]
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(https://github.com/rust-lang/cargo/pull/2693).
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* [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
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variable that corresponds to the `links` field of the manifest]
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(https://github.com/rust-lang/cargo/pull/2710).
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* [Ban keywords from crate names]
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(https://github.com/rust-lang/cargo/pull/2707).
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* [Canonicalize `CARGO_HOME` on Windows]
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(https://github.com/rust-lang/cargo/pull/2604).
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* [Retry network requests]
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(https://github.com/rust-lang/cargo/pull/2396).
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By default they are retried twice, which can be customized with the
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`net.retry` value in `.cargo/config`.
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* [Don't print extra error info for failing subcommands]
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(https://github.com/rust-lang/cargo/pull/2674).
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* [Add `--force` flag to `cargo install`]
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(https://github.com/rust-lang/cargo/pull/2405).
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* [Don't use `flock` on NFS mounts]
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(https://github.com/rust-lang/cargo/pull/2623).
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* [Prefer building `cargo install` artifacts in temporary directories]
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(https://github.com/rust-lang/cargo/pull/2610).
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Makes it possible to install multiple crates in parallel.
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* [Add `cargo test --doc`]
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(https://github.com/rust-lang/cargo/pull/2578).
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* [Add `cargo --explain`]
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(https://github.com/rust-lang/cargo/pull/2551).
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* [Don't print warnings when `-q` is passed]
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(https://github.com/rust-lang/cargo/pull/2576).
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* [Add `cargo doc --lib` and `--bin`]
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(https://github.com/rust-lang/cargo/pull/2577).
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* [Don't require build script output to be UTF-8]
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(https://github.com/rust-lang/cargo/pull/2560).
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* [Correctly attempt multiple git usernames]
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(https://github.com/rust-lang/cargo/pull/2584).
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Performance
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-----------
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* [rustc memory usage was reduced by refactoring the context used for
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type checking]
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(https://github.com/rust-lang/rust/pull/33425).
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* [Speed up creation of `HashMap`s by caching the random keys used
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to initialize the hash state]
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(https://github.com/rust-lang/rust/pull/33318).
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* [The `find` implementation for `Chain` iterators is 2x faster]
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(https://github.com/rust-lang/rust/pull/33289).
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* [Trait selection optimizations speed up type checking by 15%]
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(https://github.com/rust-lang/rust/pull/33138).
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* [Efficient trie lookup for boolean Unicode properties]
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(https://github.com/rust-lang/rust/pull/33098).
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10x faster than the previous lookup tables.
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* [Special case `#[derive(Copy, Clone)]` to avoid bloat]
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(https://github.com/rust-lang/rust/pull/31414).
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Usability
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---------
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* Many incremental improvements to documentation and rustdoc.
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* [rustdoc: List blanket trait impls]
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(https://github.com/rust-lang/rust/pull/33514).
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* [rustdoc: Clean up ABI rendering]
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(https://github.com/rust-lang/rust/pull/33151).
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* [Indexing with the wrong type produces a more informative error]
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(https://github.com/rust-lang/rust/pull/33401).
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* [Improve diagnostics for constants being used in irrefutable patterns]
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(https://github.com/rust-lang/rust/pull/33406).
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* [When many method candidates are in scope limit the suggestions to 10]
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(https://github.com/rust-lang/rust/pull/33338).
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* [Remove confusing suggestion when calling a `fn` type]
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(https://github.com/rust-lang/rust/pull/33325).
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* [Do not suggest changing `&mut self` to `&mut mut self`]
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(https://github.com/rust-lang/rust/pull/33319).
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Misc
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----
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* [Update i686-linux-android features to match Android ABI]
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(https://github.com/rust-lang/rust/pull/33651).
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* [Update aarch64-linux-android features to match Android ABI]
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(https://github.com/rust-lang/rust/pull/33500).
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* [`std` no longer prints backtraces on platforms where the running
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module must be loaded with `env::current_exe`, which can't be relied
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on](https://github.com/rust-lang/rust/pull/33554).
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* This release includes std binaries for the i586-unknown-linux-gnu,
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i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
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i586 target is for old x86 hardware without SSE2, and the armv7
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target is for Android running on modern ARM architectures.
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* [The `rust-gdb` and `rust-lldb` scripts are distributed on all
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Unix platforms](https://github.com/rust-lang/rust/pull/32835).
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* [On Unix the runtime aborts by calling `libc::abort` instead of
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generating an illegal instruction]
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(https://github.com/rust-lang/rust/pull/31457).
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* [Rust is now bootstrapped from the previous release of Rust,
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instead of a snapshot from an arbitrary commit]
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(https://github.com/rust-lang/rust/pull/32942).
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Compatibility Notes
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-------------------
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* [`AtomicBool` is now bool-sized, not word-sized]
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(https://github.com/rust-lang/rust/pull/33579).
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* [`target_env` for Linux ARM targets is just `gnu`, not
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`gnueabihf`, `gnueabi`, etc]
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(https://github.com/rust-lang/rust/pull/33403).
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* [Consistently panic on overflow in `Duration::new`]
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(https://github.com/rust-lang/rust/pull/33072).
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* [Change `String::truncate` to panic less]
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(https://github.com/rust-lang/rust/pull/32977).
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* [Add `:block` to the follow set for `:ty` and `:path`]
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(https://github.com/rust-lang/rust/pull/32945).
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Affects how macros are parsed.
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* [Fix macro hygiene bug]
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(https://github.com/rust-lang/rust/pull/32923).
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* [Feature-gated attributes on macro-generated macro invocations are
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now rejected]
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(https://github.com/rust-lang/rust/pull/32791).
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* [Suppress fallback and ambiguity errors during type inference]
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(https://github.com/rust-lang/rust/pull/32258).
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This caused some minor changes to type inference.
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1313
Version 1.9.0 (2016-05-26)
2314
==========================
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