present perfect passive constructions need to use the past participle form,
which for run is "run".

Split MaybeUninit::write into new feature gate and stabilize it

This splits off the `MaybeUninit::write` function from the `maybe_uninit_extra` feature gate into a new `maybe_uninit_write` feature gate and stabilizes it.

Earlier work to improve the documentation of the write function: rust-lang#86220

Tracking issue: rust-lang#63567

Remove unstable `io::Cursor::remaining`

Adding `io::Cursor::remaining` in rust-lang#86037 caused a conflict with the implementation of `bytes::Buf` for `io::Cursor`, leading to an error in nightly, see rust-lang#86369 (comment).

This fixes the error by temporarily removing the `remaining` function.

r? `@yaahc`

…riplett

stdio_locked: add tracking issue

Add the tracking issue number rust-lang#86845 to the stability attributes for the implementation in rust-lang#86799.

r? `@joshtriplett`
`@rustbot` label +A-io +C-cleanup +T-libs-api

rustdoc: remove dead code in `clean`

Builds on rust-lang#86886 and should not be merged before.

…Mark-Simulacrum

Fix rust-analyzer install when not available.

This changes it so that `x.py install` won't fail if rust-analyzer isn't available. This was changed in rust-lang#86568 to handle the case where installing on stable/beta, and `extended=true`, to skip rust-analyzer. But I neglected to update the install part to also ignore it.

Fixes rust-lang#86999

…play, r=notriddle

Fix implementors display

Part of rust-lang#86632.

This PR does a few things:
 * It fixes of the JS rendered implementors.
 * It generates anchors for JS rendered implementors to make it coherent with the others.
 * It adds a test to ensure that we won't have the same issue again.
 * It changes the way we render the rustdoc-gui crates to simplify it a bit and also to allow to have dependencies without going through compiletest.

Before:

![Screenshot from 2021-07-10 13-30-13](https://user-images.githubusercontent.com/3050060/125174172-b4048700-e1c3-11eb-8f0e-c46081371d4f.png)

After:

![Screenshot from 2021-07-10 21-11-15](https://user-images.githubusercontent.com/3050060/125174173-b49d1d80-e1c3-11eb-8740-1dbbff70c2eb.png)

I plan to add the `[src]` links in another PR because this one is already big enough.

cc `@Mark-Simulacrum` (for the bootstrap changes)

r? `@Nemo157`

Fix ICE with unsized type in const pattern

Fixes rust-lang#87046. The `deref_const()` query currently contains the following check:
https://github.com/rust-lang/rust/blob/e9a387d6cf5961a7f2dcb671da3147bd413355c4/compiler/rustc_mir/src/const_eval/mod.rs#L191-L204

i.e. this will cause an ICE for every unsized type except slices. An error is reported with my changes if such a type is used as a const pattern (this should not be a breaking change, since so far, this has caused an ICE).

…-obk

Simplify future incompatible reporting.

This simplifies the implementation of the future incompatible reporting system. Instead of having a separate field in the future_incompatible definition, this reuses the `FutureIncompatibilityReason` enum. It also drops the "date" field. Cargo does not use the date field, and there isn't much of a need for this to be structured, and I am skeptical that the date can be predicted reliably. The date or release version can be listed in the lint text if desired.

…=lnicola

⬆️ rust-analyzer

`@bors` r+

Rustdoc: suggest removing disambiguator if linking to field

This fixes rust-lang#85615.

`@rustbot` label T-rustdoc

…-obk

CTFE engine: small cleanups

I noticed these while preparing a large PR, and figured I'd better send them ahead to not muddy the diff unnecessarily.

- remove remaining use of Pointer in Allocation API (I missed those in rust-lang#85472)
- remove unnecessary deallocate_local hack (this logic does not seem necessary any more)

r? `@oli-obk`