Updated RELEASES.md for 1.34.0
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Aaron Power
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RELEASES.md
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RELEASES.md
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Version v1.34.0 (2019-04-11)
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==========================
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Language
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--------
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- [You can now use `#[deprecation = "reason"]`][58166] as a shorthand for
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`#[deprecation(note = "reason")]`. This was previously allowed as a syntax bug
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but had no effect.
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- [You can now accept token streams in `#[attr()]`,`#[attr[]]`, and
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`#[attr{}]` procedural macros.][57367]
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- [You can now write `extern crate self as foo;`][57407] to import the your
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crate's root into the extern prelude.
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Compiler
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--------
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- [You can now target `riscv64imac-unknown-none-elf` and
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`riscv64gc-unknown-none-elf`.][58406]
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- [You can now enable linker plugin LTO optimisations with
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`-C linker-plugin-lto`.][58057] This allows rustc to compile your Rust code
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into LLVM bitcode allowing LLVM to perform LTO optimisations across C/C++ FFI
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boundaries.
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- [You can now target `powerpc64-unknown-freebsd`.][57809]
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Libraries
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---------
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- [The trait bounds have been removed on some of `HashMap<K, V, S>`'s and
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`HashSet<T, S>`'s basic methods.][58370] Most notably you no longer require
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the `Hash` trait to create an iterator.
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- [Relax Ord trait bounds have been removed on some of `BinaryHeap<T>`'s basic
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methods.][58421] Most notably you no longer require the `Ord` trait to create
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an iterator.
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- [The methods `overflowing_neg` and `wrapping_neg` are now `const` functions
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for all numeric types.][58044]
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- [Indexing a `str` is now generic over all types that
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implement `SliceIndex<str>`.][57604]
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- [`str::trim`, `str::trim_matches`, `str::trim_{start, end}`, and
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`str::trim_{start, end}_matches` are now `#[must_use]`][57106] and will
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produce a warning if their returning type is unused.
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- [The methods `checked_pow`, `saturating_pow`, `wrapping_pow`, and
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`overflowing_pow` are now available for all numeric types.][57873] These are
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equivalvent to methods such as `wrapping_add` for the `pow` operation.
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Stabilized APIs
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---------------
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#### std & core
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* [`Any::type_id`]
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* [`Error::type_id`]
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* [`atomic::AtomicI16`]
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* [`atomic::AtomicI32`]
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* [`atomic::AtomicI64`]
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* [`atomic::AtomicI8`]
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* [`atomic::AtomicU16`]
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* [`atomic::AtomicU32`]
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* [`atomic::AtomicU64`]
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* [`atomic::AtomicU8`]
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* [`convert::Infallible`]
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* [`convert::TryFrom`]
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* [`convert::TryInto`]
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* [`iter::FromFn`]
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* [`iter::Successors`]
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* [`iter::from_fn`]
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* [`iter::successors`]
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* [`num::NonZeroI128`]
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* [`num::NonZeroI16`]
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* [`num::NonZeroI32`]
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* [`num::NonZeroI64`]
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* [`num::NonZeroI8`]
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* [`num::NonZeroIsize`]
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* [`slice::sort_by_cached_key`]
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* [`str::escape_debug`]
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* [`str::escape_default`]
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* [`str::escape_unicode`]
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* [`str::split_ascii_whitespace`]
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#### std
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* [`Instant::checked_add`]
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* [`Instant::checked_sub`]
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* [`SystemTime::checked_add`]
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* [`SystemTime::checked_sub`]
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Cargo
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-----
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- [You can now use alternatives registries to crates.io.][cargo/6654]
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Misc
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----
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- [You can now use the `?` operator in your documentation tests without manually
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adding `fn main() -> Result<(), _> {}`.][56470]
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Compatibility Notes
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-------------------
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- [`Command::before_exec` is now deprecated in favor of the
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unsafe method `Command::pre_exec`.][58059]
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- [Use of `ATOMIC_{BOOL, ISIZE, USIZE}_INIT` is now deprecated.][57425] As you
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can now use `const` functions in `static` variables.
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[58370]: https://github.com/rust-lang/rust/pull/58370/
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[58406]: https://github.com/rust-lang/rust/pull/58406/
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[58421]: https://github.com/rust-lang/rust/pull/58421/
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[58166]: https://github.com/rust-lang/rust/pull/58166/
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[58044]: https://github.com/rust-lang/rust/pull/58044/
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[58057]: https://github.com/rust-lang/rust/pull/58057/
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[58059]: https://github.com/rust-lang/rust/pull/58059/
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[57809]: https://github.com/rust-lang/rust/pull/57809/
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[57873]: https://github.com/rust-lang/rust/pull/57873/
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[57604]: https://github.com/rust-lang/rust/pull/57604/
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[57367]: https://github.com/rust-lang/rust/pull/57367/
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[57407]: https://github.com/rust-lang/rust/pull/57407/
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[57425]: https://github.com/rust-lang/rust/pull/57425/
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[57106]: https://github.com/rust-lang/rust/pull/57106/
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[56470]: https://github.com/rust-lang/rust/pull/56470/
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[cargo/6654]: https://github.com/rust-lang/cargo/pull/6654/
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[`Any::type_id`]: https://doc.rust-lang.org/std/any/trait.Any.html#tymethod.type_id
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[`Error::type_id`]: https://doc.rust-lang.org/std/error/trait.Error.html#tymethod.type_id
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[`atomic::AtomicI16`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI16.html
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[`atomic::AtomicI32`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI32.html
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[`atomic::AtomicI64`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI64.html
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[`atomic::AtomicI8`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI8.html
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[`atomic::AtomicU16`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU16.html
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[`atomic::AtomicU32`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU32.html
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[`atomic::AtomicU64`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU64.html
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[`atomic::AtomicU8`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU8.html
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[`convert::Infallible`]: https://doc.rust-lang.org/std/convert/enum.Infallible.html
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[`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html
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[`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html
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[`iter::FromFn`]: https://doc.rust-lang.org/std/iter/struct.FromFn.html
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[`iter::Successors`]: https://doc.rust-lang.org/std/iter/struct.Successors.html
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[`iter::from_fn`]: https://doc.rust-lang.org/std/iter/fn.from_fn.html
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[`iter::successors`]: https://doc.rust-lang.org/std/iter/fn.successors.html
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[`num::NonZeroI128`]: https://doc.rust-lang.org/std/num/struct.NonZeroI128.html
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[`num::NonZeroI16`]: https://doc.rust-lang.org/std/num/struct.NonZeroI16.html
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[`num::NonZeroI32`]: https://doc.rust-lang.org/std/num/struct.NonZeroI32.html
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[`num::NonZeroI64`]: https://doc.rust-lang.org/std/num/struct.NonZeroI64.html
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[`num::NonZeroI8`]: https://doc.rust-lang.org/std/num/struct.NonZeroI8.html
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[`num::NonZeroIsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroIsize.html
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[`slice::sort_by_cached_key`]: https://doc.rust-lang.org/std/slice/fn.sort_by_cached_key
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[`str::escape_debug`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_debug
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[`str::escape_default`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_default
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[`str::escape_unicode`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_unicode
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[`str::split_ascii_whitespace`]: https://doc.rust-lang.org/std/primitive.str.html#method.split_ascii_whitespace
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[`Instant::checked_add`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_add
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[`Instant::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_sub
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[`SystemTime::checked_add`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_add
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[`SystemTime::checked_sub`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_sub
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Version 1.33.0 (2019-02-28)
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==========================
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@ -99,6 +249,8 @@ Stabilized APIs
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Cargo
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-----
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- [You can now publish crates which require a feature flag to compile with
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`cargo publish --features` or `cargo publish --all-features`.][cargo/6453]
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- [Cargo should now rebuild a crate if a file was modified during the initial
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build.][cargo/6484]
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@ -135,6 +287,7 @@ Compatibility Notes
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[57535]: https://github.com/rust-lang/rust/pull/57535/
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[57566]: https://github.com/rust-lang/rust/pull/57566/
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[57615]: https://github.com/rust-lang/rust/pull/57615/
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[cargo/6453]: https://github.com/rust-lang/cargo/pull/6453/
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[cargo/6484]: https://github.com/rust-lang/cargo/pull/6484/
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[`unix::FileExt::read_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.read_exact_at
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[`unix::FileExt::write_all_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.write_all_at
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