Rollup merge of #31099 - brson:relnotes, r=alexcrichton

This commit is contained in:
Manish Goregaokar 2016-01-30 17:57:16 +05:30
commit ee4f4edd47
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Version 1.7.0 (2016-03-03)
==========================
Language
--------
* Soundness fixes to the interactions between associated types and
lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
code that violates the new rules. This is a significant change that
is known to break existing code, so it has emitted warnings for the
new error cases since 1.4 to give crate authors time to adapt. The
details of what is changing are subtle; read the RFC for more.
Libraries
---------
* Stabilized APIs:
[`Path::strip_prefix`][] (renamed from relative_from),
[`path::StripPrefixError`][] (new error type returned from strip_prefix),
[`Ipv4Addr::is_loopback`],
[`Ipv4Addr::is_private`],
[`Ipv4Addr::is_link_local`],
[`Ipv4Addr::is_multicast`],
[`Ipv4Addr::is_broadcast`],
[`Ipv4Addr::is_documentation`],
[`Ipv6Addr::is_unspecified`],
[`Ipv6Addr::is_loopback`],
[`Ipv6Addr::is_multicast`],
[`Vec::as_slice`],
[`Vec::as_mut_slice`],
[`String::as_str`],
[`String::as_mut_str`],
`<[T]>::`[`clone_from_slice`], which now requires the two slices to
be the same length
`<[T]>::`[`sort_by_key`],
[`i32::checked_rem`],
[`i32::checked_neg`],
[`i32::checked_shl`],
[`i32::checked_shr`],
[`i32::saturating_mul`],
[`i32::overflowing_add`],
[`i32::overflowing_sub`],
[`i32::overflowing_mul`],
[`i32::overflowing_div`],
[`i32::overflowing_rem`],
[`i32::overflowing_neg`],
[`i32::overflowing_shl`],
[`i32::overflowing_shr`],
[`u32::checked_rem`],
[`u32::checked_neg`],
[`u32::checked_shl`],
[`u32::checked_shl`],
[`u32::saturating_mul`],
[`u32::overflowing_add`],
[`u32::overflowing_sub`],
[`u32::overflowing_mul`],
[`u32::overflowing_div`],
[`u32::overflowing_rem`],
[`u32::overflowing_neg`],
[`u32::overflowing_shl`],
[`u32::overflowing_shr`],
checked, saturated, and overflowing operations for other primitive types,
[`ffi::IntoStringError`],
[`CString::into_string`],
[`CString::into_bytes`],
[`CString::into_bytes_with_nul`],
`From<CString> for Vec<u8>`,
[`IntoStringError::into_cstring`],
[`IntoStringError::utf8_error`],
`Error for IntoStringError`.
* [Validating UTF-8 is faster by a factor of between 7 and 14x for
ASCII input][1.7utf8]. This means that creating `String`s and `str`s
from bytes is faster.
* [The performance of `LineWriter` (and thus `io::stdout`) was
improved by using `memchr` to search for newlines][1.7m].
* [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
`f64` variants were stabilized previously.
* [`BTreeMap` was rewritten to use less memory improve performance of
insertion and iteration, the latter by as much as 5x`][1.7bm].
* [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
covariant over their contained type][1.7bt].
* [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
over their contained type][1.7ll].
* [`str::replace` now accepts a `Pattern`][1.7rp], like other string
searching methods.
* [`Any` is implemented for unsized types][1.7a].
* [`Hash` is implemented for `Duration`][1.7h].
Misc
----
* [The `--error-format=json` flag to `rustc` causes it to emit errors
in JSON format][1.7j]. This is an unstable flag and so also requires
the `-Z unstable-options` flag.
* [When running tests with `--test`, rustdoc will pass `--cfg`
arguments to the compiler][1.7dt].
* [The compiler is built with RPATH information by default][1.7rp].
This means that it will be possible to run `rustc` when installed in
unusual configurations without configuring the dynamic linker search
path explicitly.
* [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dt]. This makes
any RPATH entries (emitted with `-C rpath`) *not* take precedence
over `LD_LIBRARY_PATH`.
Cargo
-----
* [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
* [The `rerun-if-changed` build script directive no longer causes the
build script to incorrectly run twice in certain scenarios][1.7rr].
Compatibility Notes
-------------------
* [Several bugs in the compiler's visibility calculations were
fixed][1.7v]. Since this was found to break significant amounts of
code, the new errors will be emitted as warnings for several release
cycles, under the `private_in_public` lint.
* Defaulted type parameters were accidentally accepted in positions
that were not intended. In this release, [defaulted type parameters
appearing outside of type definitions will generate a
warning][1.7d], which will become an error in future releases.
* [Parsing "." as a float results in an error instead of
0][1.7p]. That is, `".".parse::<f32>()` returns `Err`, not `Ok(0)`.
* [Borrows of closure parameters may not outlive the closure][1.7bc].
[1.7a]: https://github.com/rust-lang/rust/pull/30928
[1.7bc]: https://github.com/rust-lang/rust/pull/30341
[1.7bm]: https://github.com/rust-lang/rust/pull/30426
[1.7bt]: https://github.com/rust-lang/rust/pull/30998
[1.7cp]: https://github.com/rust-lang/cargo/pull/2224
[1.7d]: https://github.com/rust-lang/rust/pull/30724
[1.7dt]: https://github.com/rust-lang/rust/pull/30372
[1.7dt]: https://github.com/rust-lang/rust/pull/30394
[1.7f]: https://github.com/rust-lang/rust/pull/30672
[1.7h]: https://github.com/rust-lang/rust/pull/30818
[1.7j]: https://github.com/rust-lang/rust/pull/30711
[1.7ll]: https://github.com/rust-lang/rust/pull/30663
[1.7m]: https://github.com/rust-lang/rust/pull/30381
[1.7p]: https://github.com/rust-lang/rust/pull/30681
[1.7rp]: https://github.com/rust-lang/rust/pull/29498
[1.7rp]: https://github.com/rust-lang/rust/pull/30353
[1.7rr]: https://github.com/rust-lang/cargo/pull/2279
[1.7sf]: https://github.com/rust-lang/rust/pull/30389
[1.7utf8]: https://github.com/rust-lang/rust/pull/30740
[1.7v]: https://github.com/rust-lang/rust/pull/29973
[RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
[`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
[`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
[`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
[`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
[`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
[`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
[`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
[`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
[`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
[`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
[`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
[`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
[`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
[`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
[`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
[`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
[`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
[`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
[`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
[`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
[`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
[`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
[`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
[`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
[`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
[`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
[`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
[`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
[`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
[`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
[`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
[`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
[`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
[`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
[`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
[`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
[`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
[`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
[`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
[`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
[`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
[`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
[`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
[`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
[`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
[`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
[`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
Version 1.6.0 (2016-01-21)
==========================
Language
--------
* The `#![no_std]` attribute causes a crate to not be linked to the
standard library, but only the [core library][1.6co], as described
in [RFC 1184]. The core library defines common types and traits but
has no platform dependencies whatsoever, and is the basis for Rust
software in environments that cannot support a full port of the
standard library, such as operating systems. Most of the core
library is now stable.
Libraries
---------
* Stabilized APIs:
[`Read::read_exact`],
[`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
[`fs::DirBuilder`], [`fs::DirBuilder::new`],
[`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
[`os::unix::fs::DirBuilderExt`],
[`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
[`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
[`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
[`collections::hash_map::Drain`],
[`collections::hash_map::HashMap::drain`],
[`collections::hash_set::Drain`],
[`collections::hash_set::HashSet::drain`],
[`collections::binary_heap::Drain`],
[`collections::binary_heap::BinaryHeap::drain`],
[`Vec::extend_from_slice`][] (renamed from `push_all`),
[`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
[`RwLock::into_inner`],
[`Iterator::min_by_key`][] (renamed from `min_by`),
[`Iterator::max_by_key`][] (renamed from `max_by`).
* The [core library][1.6co] is stable, as are most of its APIs.
* [The `assert_eq!` macro supports arguments that don't implement
`Sized`][1.6ae], such as arrays. In this way it behaves more like
`assert!`.
* Several timer functions that take duration in milliseconds [are
deprecated in favor of those that take `Duration`][1.6ms]. These
include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
`thread::park_timeout_ms`.
* The algorithm by which `Vec` reserves additional elements was
[tweaked to not allocate excessive space][1.6a] while still growing
exponentially.
* `From` conversions are [implemented from integers to floats][1.6f]
in cases where the conversion is lossless. Thus they are not
implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
or `f64`. They are also not implemented for `isize` and `usize`
because the implementations would be platform-specific. `From` is
also implemented from `f32` to `f64`.
* `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
* `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
* `IntoIterator` is implemented for `&PathBuf` and `&Path`.
* [`BinaryHeap` was refactored][1.6bh] for modest performance
improvements.
* Sorting slices that are already sorted [is 50% faster in some
cases][1.6s].
Cargo
-----
* Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
* Cargo build scripts can specify their dependencies by emitting the
[`rerun-if-changed`][1.6rr] key.
* crates.io will reject publication of crates with dependencies that
have a wildcard version constraint. Crates with wildcard
dependencies were seen to cause a variety of problems, as described
in [RFC 1241]. Since 1.5 publication of such crates has emitted a
warning.
* `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
release folder. A variety of artifacts that Cargo failed to clean
are now correctly deleted.
Misc
----
* The `unreachable_code` lint [warns when a function call's argument
diverges][1.6dv].
* The parser indicates [failures that may be caused by
confusingly-similar Unicode characters][1.6uc]
* Certain macro errors [are reported at definition time][1.6m], not
expansion.
Compatibility Notes
-------------------
* The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
environment variable when locating crates. This was a pre-cargo
feature for integrating with the package manager that was
accidentally never removed.
* [A number of bugs were fixed in the privacy checker][1.6p] that
could cause previously-accepted code to break.
* [Modules and unit/tuple structs may not share the same name][1.6ts].
* [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
struct pattern syntax (`Foo(..)`) can no longer be used to match
unit structs. This is a warning now, but will become an error in
future releases. Patterns that share the same name as a const are
now an error.
* A bug was fixed that causes [rustc not to apply default type
parameters][1.6xc] when resolving certain method implementations of
traits defined in other crates.
[1.6a]: https://github.com/rust-lang/rust/pull/29454
[1.6ae]: https://github.com/rust-lang/rust/pull/29770
[1.6bh]: https://github.com/rust-lang/rust/pull/29811
[1.6c]: https://github.com/rust-lang/cargo/pull/2192
[1.6cc]: https://github.com/rust-lang/cargo/pull/2131
[1.6co]: http://doc.rust-lang.org/beta/core/index.html
[1.6dv]: https://github.com/rust-lang/rust/pull/30000
[1.6f]: https://github.com/rust-lang/rust/pull/29129
[1.6m]: https://github.com/rust-lang/rust/pull/29828
[1.6ms]: https://github.com/rust-lang/rust/pull/29604
[1.6p]: https://github.com/rust-lang/rust/pull/29726
[1.6rp]: https://github.com/rust-lang/rust/pull/30034
[1.6rr]: https://github.com/rust-lang/cargo/pull/2134
[1.6s]: https://github.com/rust-lang/rust/pull/29675
[1.6ts]: https://github.com/rust-lang/rust/issues/21546
[1.6uc]: https://github.com/rust-lang/rust/pull/29837
[1.6us]: https://github.com/rust-lang/rust/pull/29383
[1.6xc]: https://github.com/rust-lang/rust/issues/30123
[RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
[RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
[`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
[`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
[`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
[`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
[`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
[`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
[`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
[`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
[`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
[`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
[`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
[`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
[`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
[`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
[`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
[`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
[`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
[`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
[`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
[`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
[`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
[`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
[`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
[`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
[`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
[`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
[`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
Version 1.5.0 (2015-12-10)
==========================