This reverts commit 8ed2292.

It caused doctests in this repository to no longer be tested including all of the core crate.

…y are not a team member

For `libc` types that will be initialized in FFI calls, we can just use
`MaybeUninit` and then pass around raw pointers.

For `sun_path_offset()`, which really wants `offset_of`, all callers
have a real `sockaddr_un` available, so we can use that reference.

Refs rust-lang#62061

A small PR to fix a small CS typo in `iter/traits/collect.rs`.

…sdreavus

Revert "Set test flag when rustdoc is running with --test option"

Reverts rust-lang#59940.

It caused doctests in this repository to no longer be tested including all of the core crate.

…petrochenkov

Add `--pass $mode` to compiletest through `./x.py`

Adds a flag `--pass $mode` to compiletest, which is exposed through `./x.py`.

When `--pass $mode` is passed, `{check,build,compile,run}-pass` tests will be forced to run under the given `$mode` unless the directive `// ignore-pass` exists in the test file.

The modes are explained in rust-lang#61778:
- `check` has the same effect as `cargo check`
- `build` or `compile` have the same effect as `cargo build`
- `run` has the same effect as `cargo run`

On my machine, `./x.py -i test src/test/run-pass --stage 1 --pass check` takes 38 seconds whereas it takes 2 min 7 seconds without `--pass check`.

cc rust-lang#61712

r? @petrochenkov

publish_toolstate: don't use 'new' from inside the loop

I think I made a mistake in rust-lang#61938 by using `new` outside the inner loop. This PR fixes that.

However, no issue got created at all for rust-lang#62003 (comment), and I don't know why that is.   The script should be [triggered by Traivs](https://github.com/rust-lang/rust/blob/56a12b2ad058f22f1ef090713df15598525ba4a4/.travis.yml#L240), and I can find no trace of that in [the build log](https://travis-ci.com/rust-lang/rust/jobs/209880042).

Inform the query system about properties of queries at compile time

Update miri

Fixes rust-lang#62101

r? @RalfJung

…g,oli-obk,Centril

Implement mem::{zeroed,uninitialized} in terms of MaybeUninit.

Refs rust-lang#62061

r? @oli-obk

Avoid mem::uninitialized() in std::sys::unix

For `libc` types that will be initialized in FFI calls, we can just use
`MaybeUninit` and then pass around raw pointers.

For `sun_path_offset()`, which really wants `offset_of`, all callers
have a real `sockaddr_un` available, so we can use that reference.

r? @RalfJung

doc(libcore) Fix CS

A small PR to fix a small CS typo in `iter/traits/collect.rs`.