It's a ~1% win on `keccak` and `inflate`.

In case that it is statically known that the OS doesn't support
`getrandom` (non-Linux) or becomes clear at runtime that `getrandom`
isn't available (`ENOSYS`), the opened fd ("/dev/urandom") isn't closed
after the function, so that future calls can reuse it. This saves
repeated `open`/`close` system calls at the cost of one permanently open
fd.

Additionally, this skips the initial zero-length `getrandom` call and
directly hands the user buffer to the operating system, saving one
`getrandom` syscall.

This typo was introduced in rust-lang#47334.
A couple tests bitrotted as a result, so we fix those too, and move them
to a more sensible place.

…n rustc.

`bad_style` is being deprecated in favor of `nonstandard_style`:

- rust-lang#41646

This commit generalizes the existing `async_idents` lint to easily encompass
other identifiers that will be keywords in future editions. The new lint is
called `keyword_idents` and the old `async_idents` lint is registered as renamed
to this new lint.

As a proof of concept the `try` keyword was added to this list as it looks to be
listed as a keyword in the 2018 edition only. The `await` keyword was not added
as it's not listed as a keyword yet.

Closes rust-lang#53077

…q-example, r=QuietMisdreavus

Add another PartialEq example

r? @steveklabnik

…omez

Add example for Cow

Add one more example that shows how to keep `Cow` in a struct.

Link to playground: https://play.rust-lang.org/?gist=a9256bdd034b44bc3cdd0044bbcdbb7c&version=stable&mode=debug&edition=2015

Users ask this question in [ruRust](https://gitter.im/ruRust/general) chat time to time and it is not obvious to add `ToOwned<Owned=Target>` to requirements of generic params.

…, r=pnkfelix

remove `let x = baz` which was obscuring the real error

fixes rust-lang#51172

document effect of join on memory ordering

Fixes rust-lang#45467

Use FxHash{Map,Set} instead of the default Hash{Map,Set} everywhere in rustc.

Most of the compiler uses the `Fx` hasher but some places ended up with the default one.

…artial-eq, r=KodrAus

Add partialeq implementation for TryFromIntError type

Fixes rust-lang#53458.

… r=varkor

Force-inline `shallow_resolve` at its hottest call site.

It's a ~1% win on `keccak` and `inflate`.

set applicability

Update a few more calls as described in rust-lang#50723

r? @estebank

Generalize `async_idents` to all new keywords

This commit generalizes the existing `async_idents` lint to easily encompass
other identifiers that will be keywords in future editions. The new lint is
called `keyword_idents` and the old `async_idents` lint is registered as renamed
to this new lint.

As a proof of concept the `try` keyword was added to this list as it looks to be
listed as a keyword in the 2018 edition only. The `await` keyword was not added
as it's not listed as a keyword yet.

Closes rust-lang#53077

…o_vis_matcher, r=cramertj

Fix stabilisation version for macro_vis_matcher.

r? @cramertj

…richton

Reduce number of syscalls in `rand`

This skips the initial zero-length `getrandom` call and
directly hands the user buffer to the operating system, saving one
`getrandom` syscall.

…, r=nikomatsakis

Do not suggest dereferencing in macro

Fix rust-lang#52783.

save-analysis: Differentiate foreign functions and statics.

add llvm-readobj to llvm-tools-preview

Similar to readelf but supports more object formats (it seems). Particularly useful to inspect in detail sections (e.g. their flags) and symbols (e.g. their types).

r? @alexcrichton
cc @dvc94ch

fix a typo: taget_env -> target_env

This typo was introduced in rust-lang#47334. A couple tests bitrotted as a result, so we fix those too, and move them to a more sensible place.

Is there some lint we could turn on that would've caught this? It's a drag that cfg typos can silently pass through the compiler.

…etMisdreavus

Rustdoc fixes

Fixes rustdoc not scrolling to given lines and invalid unstable display:

<img width="1440" alt="screen shot 2018-08-27 at 23 28 47" src="https://user-images.githubusercontent.com/3050060/44687252-06535e80-aa51-11e8-8512-d7d34d1cb963.png">

r? @QuietMisdreavus

expand keep-stage --help text

Fix typo in comment

move file-extension based .gitignore down to src/

Currently, it for example ignores `*.rlib` files in the repository root -- which I think is wrong; I sometimes get these files when I call rustc directly and I do want them cleaned up, not ignored. No such files are created during the normal build process.

Fix a comment in src/libcore/slice/mod.rs

…shearth

Replace usages of 'bad_style' with 'nonstandard_style'.

`bad_style` is being deprecated in favor of `nonstandard_style`:

- rust-lang#41646