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Auto merge of rust-lang#79091 - pietroalbini:stable-next, r=pietroalbini
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Rust 1.48.0 stable release

This PR bumps the 1.48 beta branch to the 1.48 stable branch, and applies these last minute backports:

* rust-lang#77939 - Ensure that the source code display is working with DOS backline
* rust-lang#77508 - Fix capitalization in blog post name
* rust-lang#78559 - Add LLVM upgrades from 7 to 10 to RELEASES.md
* rust-lang#78364 - Update RELEASES.md for 1.48.0

r? `@ghost`
cc `@rust-lang/release`
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151 changes: 150 additions & 1 deletion RELEASES.md
Original file line number Diff line number Diff line change
@@ -1,3 +1,143 @@
Version 1.48.0 (2020-11-19)
==========================

Language
--------

- [The `unsafe` keyword is now syntactically permitted on modules.][75857] This
is still rejected *semantically*, but can now be parsed by procedural macros.

Compiler
--------
- [Stabilised the `-C link-self-contained=<yes|no>` compiler flag.][76158] This tells
`rustc` whether to link its own C runtime and libraries or to rely on a external
linker to find them. (Supported only on `windows-gnu`, `linux-musl`, and `wasi` platforms.)
- [You can now use `-C target-feature=+crt-static` on `linux-gnu` targets.][77386]
Note: If you're using cargo you must explicitly pass the `--target` flag.
- [Added tier 2\* support for `aarch64-unknown-linux-musl`.][76420]

\* Refer to Rust's [platform support page][forge-platform-support] for more
information on Rust's tiered platform support.

Libraries
---------
- [`io::Write` is now implemented for `&ChildStdin` `&Sink`, `&Stdout`,
and `&Stderr`.][76275]
- [All arrays of any length now implement `TryFrom<Vec<T>>`.][76310]
- [The `matches!` macro now supports having a trailing comma.][74880]
- [`Vec<A>` now implements `PartialEq<[B]>` where `A: PartialEq<B>`.][74194]
- [The `RefCell::{replace, replace_with, clone}` methods now all use `#[track_caller]`.][77055]

Stabilized APIs
---------------
- [`slice::as_ptr_range`]
- [`slice::as_mut_ptr_range`]
- [`VecDeque::make_contiguous`]
- [`future::pending`]
- [`future::ready`]

The following previously stable methods are now `const fn`'s:

- [`Option::is_some`]
- [`Option::is_none`]
- [`Option::as_ref`]
- [`Result::is_ok`]
- [`Result::is_err`]
- [`Result::as_ref`]
- [`Ordering::reverse`]
- [`Ordering::then`]

Cargo
-----

Rustdoc
-------
- [You can now link to items in `rustdoc` using the intra-doc link
syntax.][74430] E.g. ``/// Uses [`std::future`]`` will automatically generate
a link to `std::future`'s documentation. See ["Linking to items by
name"][intradoc-links] for more information.
- [You can now specify `#[doc(alias = "<alias>")]` on items to add search aliases
when searching through `rustdoc`'s UI.][75740]

Compatibility Notes
-------------------
- [Promotion of references to `'static` lifetime inside `const fn` now follows the
same rules as inside a `fn` body.][75502] In particular, `&foo()` will not be
promoted to `'static` lifetime any more inside `const fn`s.
- [Associated type bindings on trait objects are now verified to meet the bounds
declared on the trait when checking that they implement the trait.][27675]
- [When trait bounds on associated types or opaque types are ambiguous, the
compiler no longer makes an arbitrary choice on which bound to use.][54121]
- [Fixed recursive nonterminals not being expanded in macros during
pretty-print/reparse check.][77153] This may cause errors if your macro wasn't
correctly handling recursive nonterminal tokens.
- [`&mut` references to non zero-sized types are no longer promoted.][75585]
- [`rustc` will now warn if you use attributes like `#[link_name]` or `#[cold]`
in places where they have no effect.][73461]
- [Updated `_mm256_extract_epi8` and `_mm256_extract_epi16` signatures in
`arch::{x86, x86_64}` to return `i32` to match the vendor signatures.][73166]
- [`mem::uninitialized` will now panic if any inner types inside a struct or enum
disallow zero-initialization.][71274]
- [`#[target_feature]` will now error if used in a place where it has no effect.][78143]
- [Foreign exceptions are now caught by `catch_unwind` and will cause an abort.][70212]
Note: This behaviour is not guaranteed and is still considered undefined behaviour,
see the [`catch_unwind`] documentation for further information.



Internal Only
-------------
These changes provide no direct user facing benefits, but represent significant
improvements to the internals and overall performance of rustc and
related tools.

- [Building `rustc` from source now uses `ninja` by default over `make`.][74922]
You can continue building with `make` by setting `ninja=false` in
your `config.toml`.
- [cg_llvm: `fewer_names` in `uncached_llvm_type`][76030]
- [Made `ensure_sufficient_stack()` non-generic][76680]

[78143]: https://github.com/rust-lang/rust/issues/78143
[76680]: https://github.com/rust-lang/rust/pull/76680/
[76030]: https://github.com/rust-lang/rust/pull/76030/
[70212]: https://github.com/rust-lang/rust/pull/70212/
[27675]: https://github.com/rust-lang/rust/issues/27675/
[54121]: https://github.com/rust-lang/rust/issues/54121/
[71274]: https://github.com/rust-lang/rust/pull/71274/
[77386]: https://github.com/rust-lang/rust/pull/77386/
[77153]: https://github.com/rust-lang/rust/pull/77153/
[77055]: https://github.com/rust-lang/rust/pull/77055/
[76275]: https://github.com/rust-lang/rust/pull/76275/
[76310]: https://github.com/rust-lang/rust/pull/76310/
[76420]: https://github.com/rust-lang/rust/pull/76420/
[76158]: https://github.com/rust-lang/rust/pull/76158/
[75857]: https://github.com/rust-lang/rust/pull/75857/
[75585]: https://github.com/rust-lang/rust/pull/75585/
[75740]: https://github.com/rust-lang/rust/pull/75740/
[75502]: https://github.com/rust-lang/rust/pull/75502/
[74880]: https://github.com/rust-lang/rust/pull/74880/
[74922]: https://github.com/rust-lang/rust/pull/74922/
[74430]: https://github.com/rust-lang/rust/pull/74430/
[74194]: https://github.com/rust-lang/rust/pull/74194/
[73461]: https://github.com/rust-lang/rust/pull/73461/
[73166]: https://github.com/rust-lang/rust/pull/73166/
[intradoc-links]: https://doc.rust-lang.org/rustdoc/linking-to-items-by-name.html
[`catch_unwind`]: https://doc.rust-lang.org/std/panic/fn.catch_unwind.html
[`Option::is_some`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.is_some
[`Option::is_none`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.is_none
[`Option::as_ref`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.as_ref
[`Result::is_ok`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.is_ok
[`Result::is_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.is_err
[`Result::as_ref`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.as_ref
[`Ordering::reverse`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.reverse
[`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
[`slice::as_ptr_range`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_ptr_range
[`slice::as_mut_ptr_range`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_mut_ptr_range
[`VecDeque::make_contiguous`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.make_contiguous
[`future::pending`]: https://doc.rust-lang.org/std/future/fn.pending.html
[`future::ready`]: https://doc.rust-lang.org/std/future/fn.ready.html


Version 1.47.0 (2020-10-08)
==========================

Expand Down Expand Up @@ -90,7 +230,8 @@ Compatibility Notes

Internal Only
--------
- [Improved default settings for bootstrapping in `x.py`.][73964] You can read details about this change in the ["Changes To `x.py` Defaults"](https://blog.rust-lang.org/inside-rust/2020/08/30/changes-to-x-py-defaults.html) post on the Inside Rust blog.

- [Improved default settings for bootstrapping in `x.py`.][73964] You can read details about this change in the ["Changes to `x.py` defaults"](https://blog.rust-lang.org/inside-rust/2020/08/30/changes-to-x-py-defaults.html) post on the Inside Rust blog.

[1.47.0-cfg]: https://docs.microsoft.com/en-us/windows/win32/secbp/control-flow-guard
[75048]: https://github.com/rust-lang/rust/pull/75048/
Expand Down Expand Up @@ -297,6 +438,7 @@ Compiler
- [Added the `tiny` value to the `code-model` codegen flag.][72397]
- [Added tier 3 support\* for the `mipsel-sony-psp` target.][72062]
- [Added tier 3 support for the `thumbv7a-uwp-windows-msvc` target.][72133]
- [Upgraded to LLVM 10.][67759]

\* Refer to Rust's [platform support page][forge-platform-support] for more
information on Rust's tiered platform support.
Expand Down Expand Up @@ -396,6 +538,7 @@ Internals Only
[72062]: https://github.com/rust-lang/rust/pull/72062/
[72094]: https://github.com/rust-lang/rust/pull/72094/
[72133]: https://github.com/rust-lang/rust/pull/72133/
[67759]: https://github.com/rust-lang/rust/pull/67759/
[71900]: https://github.com/rust-lang/rust/pull/71900/
[71928]: https://github.com/rust-lang/rust/pull/71928/
[71662]: https://github.com/rust-lang/rust/pull/71662/
Expand Down Expand Up @@ -1270,6 +1413,7 @@ Compiler
`armv7-unknown-linux-musleabi` targets.][63107]
- [Added tier 3 support for the `hexagon-unknown-linux-musl` target.][62814]
- [Added tier 3 support for the `riscv32i-unknown-none-elf` target.][62784]
- [Upgraded to LLVM 9.][62592]

\* Refer to Rust's [platform support page][forge-platform-support] for more
information on Rust's tiered platform support.
Expand Down Expand Up @@ -1336,6 +1480,7 @@ Compatibility Notes
[62735]: https://github.com/rust-lang/rust/pull/62735/
[62766]: https://github.com/rust-lang/rust/pull/62766/
[62784]: https://github.com/rust-lang/rust/pull/62784/
[62592]: https://github.com/rust-lang/rust/pull/62592/
[62785]: https://github.com/rust-lang/rust/issues/62785/
[62814]: https://github.com/rust-lang/rust/pull/62814/
[62896]: https://github.com/rust-lang/rust/issues/62896/
Expand Down Expand Up @@ -2431,6 +2576,7 @@ Compiler
--------
- [Added the `riscv32imc-unknown-none-elf` target.][53822]
- [Added the `aarch64-unknown-netbsd` target][53165]
- [Upgraded to LLVM 8.][53611]

Libraries
---------
Expand Down Expand Up @@ -2479,6 +2625,7 @@ Misc
[53033]: https://github.com/rust-lang/rust/pull/53033/
[53044]: https://github.com/rust-lang/rust/pull/53044/
[53165]: https://github.com/rust-lang/rust/pull/53165/
[53611]: https://github.com/rust-lang/rust/pull/53611/
[53213]: https://github.com/rust-lang/rust/pull/53213/
[53236]: https://github.com/rust-lang/rust/pull/53236/
[53272]: https://github.com/rust-lang/rust/pull/53272/
Expand Down Expand Up @@ -2537,6 +2684,7 @@ Compiler
- [Bumped minimum LLVM version to 5.0.][51899]
- [Added `powerpc64le-unknown-linux-musl` target.][51619]
- [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
- [Upgraded to LLVM 7.][51966]

Libraries
---------
Expand Down Expand Up @@ -2588,6 +2736,7 @@ Compatibility Notes

[53893]: https://github.com/rust-lang/rust/pull/53893/
[52861]: https://github.com/rust-lang/rust/pull/52861/
[51966]: https://github.com/rust-lang/rust/pull/51966/
[52656]: https://github.com/rust-lang/rust/pull/52656/
[52239]: https://github.com/rust-lang/rust/pull/52239/
[52330]: https://github.com/rust-lang/rust/pull/52330/
Expand Down
2 changes: 1 addition & 1 deletion src/ci/run.sh
Original file line number Diff line number Diff line change
Expand Up @@ -63,7 +63,7 @@ fi
#
# FIXME: need a scheme for changing this `nightly` value to `beta` and `stable`
# either automatically or manually.
export RUST_RELEASE_CHANNEL=beta
export RUST_RELEASE_CHANNEL=stable

# Always set the release channel for bootstrap; this is normally not important (i.e., only dist
# builds would seem to matter) but in practice bootstrap wants to know whether we're targeting
Expand Down
4 changes: 3 additions & 1 deletion src/librustdoc/html/highlight.rs
Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,9 @@ fn write_header(out: &mut String, class: Option<&str>) {
}

fn write_code(out: &mut String, src: &str) {
Classifier::new(src).highlight(&mut |highlight| {
// This replace allows to fix how the code source with DOS backline characters is displayed.
let src = src.replace("\r\n", "\n");
Classifier::new(&src).highlight(&mut |highlight| {
match highlight {
Highlight::Token { text, class } => string(out, Escape(text), class),
Highlight::EnterSpan { class } => enter_span(out, class),
Expand Down
3 changes: 3 additions & 0 deletions src/librustdoc/html/highlight/fixtures/dos_line.html
Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">foo</span>() {
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;foo&quot;</span>);
}
32 changes: 21 additions & 11 deletions src/librustdoc/html/highlight/tests.rs
Original file line number Diff line number Diff line change
@@ -1,17 +1,6 @@
use super::write_code;
use expect_test::expect_file;

#[test]
fn test_html_highlighting() {
let src = include_str!("fixtures/sample.rs");
let html = {
let mut out = String::new();
write_code(&mut out, src);
format!("{}<pre><code>{}</code></pre>\n", STYLE, out)
};
expect_file!["fixtures/sample.html"].assert_eq(&html);
}

const STYLE: &str = r#"
<style>
.kw { color: #8959A8; }
Expand All @@ -23,3 +12,24 @@ const STYLE: &str = r#"
.question-mark { color: #ff9011; }
</style>
"#;

#[test]
fn test_html_highlighting() {
let src = include_str!("fixtures/sample.rs");
let html = {
let mut out = String::new();
write_code(&mut out, src);
format!("{}<pre><code>{}</code></pre>\n", STYLE, out)
};
expect_file!["fixtures/sample.html"].assert_eq(&html);
}

#[test]
fn test_dos_backline() {
let src = "pub fn foo() {\r\n\
println!(\"foo\");\r\n\
}\r\n";
let mut html = String::new();
write_code(&mut html, src);
expect_file!["fixtures/dos_line.html"].assert_eq(&html);
}

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