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Updated RELEASES.md for 1.37.0
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Erin Power
Mark Rousskov
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RELEASES.md
120
RELEASES.md
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Version 1.37.0 (2019-08-15)
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==========================
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Language
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--------
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- `#[must_use]` will now warn if the type is contained in a [tuple][61100],
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[`Box`][62228], or an [array][62235] and unused.
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- [You can now use the `cfg` and `cfg_attr` attributes on
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generic parameters.][61547]
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- [You can now use enum variants through type alias.][61682] e.g. You can
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write the following:
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```rust
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type MyOption = Option<u8>;
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fn increment_or_zero(x: MyOption) -> u8 {
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match x {
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MyOption::Some(y) => y + 1,
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MyOption::None => 0,
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}
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}
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```
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- [You can now use `_` as an identifier for consts.][61347] e.g. You can write
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`const _: u32 = 5;`.
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- [You can now use `#[repr(align(X)]` on enums.][61229]
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- [The `?`/_"Kleene"_ macro operator is now available in the
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2015 edition.][60932]
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Compiler
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--------
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- [You can now enable Profile-Guided Optimization with the `-C profile-generate`
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and `-C profile-use` flags.][61268] For more information on how to use profile
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guided optimization, please refer to the [rustc book][rustc-book-pgo].
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- [The `rust-lldb` wrapper script should now work again.][61827]
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Libraries
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---------
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- [`mem::MaybeUninit<T>` is now ABI-compatible with `T`.][61802]
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Stabilized APIs
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---------------
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- [`BufReader::buffer`]
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- [`BufWriter::buffer`]
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- [`Cell::from_mut`]
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- [`Cell<[T]>::as_slice_of_cells`][`Cell<slice>::as_slice_of_cells`]
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- [`DoubleEndedIterator::nth_back`]
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- [`Option::xor`]
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- [`Wrapping::reverse_bits`]
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- [`i128::reverse_bits`]
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- [`i16::reverse_bits`]
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- [`i32::reverse_bits`]
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- [`i64::reverse_bits`]
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- [`i8::reverse_bits`]
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- [`isize::reverse_bits`]
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- [`slice::copy_within`]
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- [`u128::reverse_bits`]
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- [`u16::reverse_bits`]
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- [`u32::reverse_bits`]
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- [`u64::reverse_bits`]
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- [`u8::reverse_bits`]
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- [`usize::reverse_bits`]
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Cargo
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-----
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- [`Cargo.lock` files are now included by default when publishing executable crates
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with executables.][cargo/7026]
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- [You can now specify `default-run="foo"` in `[package]` to specify the
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default executable to use for `cargo run`.][cargo/7056]
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Misc
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----
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Compatibility Notes
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-------------------
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- [Using `...` for inclusive range patterns will now warn by default.][61342]
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Please transition your code to using the `..=` syntax for inclusive
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ranges instead.
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- [Using a trait object without the `dyn` will now warn by default.][61203]
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Please transition your code to use `dyn Trait` for trait objects instead.
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[62228]: https://github.com/rust-lang/rust/pull/62228/
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[62235]: https://github.com/rust-lang/rust/pull/62235/
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[61802]: https://github.com/rust-lang/rust/pull/61802/
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[61827]: https://github.com/rust-lang/rust/pull/61827/
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[61547]: https://github.com/rust-lang/rust/pull/61547/
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[61682]: https://github.com/rust-lang/rust/pull/61682/
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[61268]: https://github.com/rust-lang/rust/pull/61268/
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[61342]: https://github.com/rust-lang/rust/pull/61342/
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[61347]: https://github.com/rust-lang/rust/pull/61347/
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[61100]: https://github.com/rust-lang/rust/pull/61100/
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[61203]: https://github.com/rust-lang/rust/pull/61203/
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[61229]: https://github.com/rust-lang/rust/pull/61229/
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[60932]: https://github.com/rust-lang/rust/pull/60932/
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[cargo/7026]: https://github.com/rust-lang/cargo/pull/7026/
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[cargo/7056]: https://github.com/rust-lang/cargo/pull/7056/
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[`BufReader::buffer`]: https://doc.rust-lang.org/std/io/struct.BufReader.html#method.buffer
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[`BufWriter::buffer`]: https://doc.rust-lang.org/std/io/struct.BufWriter.html#method.buffer
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[`Cell::from_mut`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.from_mut
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[`Cell<slice>::as_slice_of_cells`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_slice_of_cells
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[`DoubleEndedIterator::nth_back`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.nth_back
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[`Option::xor`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.xor
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[`RefCell::try_borrow_unguarded`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_unguarded
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[`Wrapping::reverse_bits`]: https://doc.rust-lang.org/std/num/struct.Wrapping.html#method.reverse_bits
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[`i128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i128.html#method.reverse_bits
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[`i16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i16.html#method.reverse_bits
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[`i32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i32.html#method.reverse_bits
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[`i64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i64.html#method.reverse_bits
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[`i8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i8.html#method.reverse_bits
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[`isize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.isize.html#method.reverse_bits
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[`slice::copy_within`]: https://doc.rust-lang.org/std/primitive.slice.html#method.copy_within
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[`u128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u128.html#method.reverse_bits
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[`u16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u16.html#method.reverse_bits
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[`u32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u32.html#method.reverse_bits
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[`u64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u64.html#method.reverse_bits
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[`u8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u8.html#method.reverse_bits
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[`usize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.usize.html#method.reverse_bits
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[rustc-book-pgo]: https://doc.rust-lang.org/rustc/profile-guided-optimization.html
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Version 1.36.0 (2019-07-04)
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==========================
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@ -39,7 +157,7 @@ Stabilized APIs
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- [`mem::MaybeUninit`]
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- [`pointer::align_offset`]
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- [`future::Future`]
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- [`task::Context`]
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- [`task::Context`]
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- [`task::RawWaker`]
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- [`task::RawWakerVTable`]
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- [`task::Waker`]
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