Replace `parse_uint` with generic `parse_number` based on `FromStr`.
Use it for parsing inlining threshold to avoid casting later.

…s output

Add some inlines to trivial methods of IpAddr
Closes rust-lang#77583

…tc` is set

 ## Motivation

This avoids having to rebuild bootstrap and tidy each time you rebase
over master. In particular, it makes rebasing and running `x.py fmt` on
each commit in a branch significantly faster. It also avoids having to
rebuild bootstrap after setting `download-rustc = true`.

 ## Implementation

Instead of extracting the CI artifacts directly to `stage0/`, extract
them to `ci-rustc/` instead. Continue to copy them to the proper
sysroots as necessary for all stages except stage 0.

This also requires `bootstrap.py` to download both stage0 and CI
artifacts and distinguish between the two when checking stamp files.

Note that since tools have to be built by the same compiler that built
`rustc-dev` and the standard library, the downloaded artifacts can't be
reused when building with the beta compiler. To make sure this is still
a good user experience, warn when building with the beta compiler, and
default to building with stage 2.

Fixes rust-lang#83852

r? `@GuillaumeGomez`

This prevents us from warning on links such as `<hello@example.com>`.
Note that we still warn on links such as `<hello@localhost>` because
they have no dots in them. However, the links will still work, even
though a warning is reported.

Now the family name is Source Serif 4 (upstream issue 77) instead of
Source Serif Pro.

Let `#[allow(unstable_name_collisions)]` work for things other than function

Fixes rust-lang#81522

In addition to the report in rust-lang#81522, currently `#[allow(unstable_name_collisions)]` doesn't suppress the corresponding diagnostics even if this attribute is appended to an expression statement or a let statement. It seems like this is because the wrong `HirId` is passed to `struct_span_lint_hir`.
It's fixed in this PR, and a regression test for it is also added.

…asper

Use FromStr trait for number option parsing

Replace `parse_uint` with generic `parse_number` based on `FromStr`.
Use it for parsing inlining threshold to avoid casting later.

…rk-Simulacrum

Use the beta compiler for building bootstrap tools when `download-rustc` is set

 ## Motivation

This avoids having to rebuild bootstrap and tidy each time you rebase
over master. In particular, it makes rebasing and running `x.py fmt` on
each commit in a branch significantly faster. It also avoids having to
rebuild bootstrap after setting `download-rustc = true`.

 ## Implementation

Instead of extracting the CI artifacts directly to `stage0/`, extract
them to `ci-rustc/` instead. Continue to copy them to the proper
sysroots as necessary for all stages except stage 0.

This also requires `bootstrap.py` to download both stage0 and CI
artifacts and distinguish between the two when checking stamp files.

Note that since tools have to be built by the same compiler that built
`rustc-dev` and the standard library, the downloaded artifacts can't be
reused when building with the beta compiler. To make sure this is still
a good user experience, warn when building with the beta compiler, and
default to building with stage 2.

I tested this by rebasing this PR from edeee91 over 1c77a1f and confirming that only the bootstrap library itself had to be rebuilt, not any dependencies and not `tidy`. I also tested that a clean build with `x.py build` builds rustdoc exactly once and does no other work, and that `touch src/librustdoc/lib.rs && x.py build` works. `x.py check` still behaves as before (checks using the beta compiler, even if there are changes to `compiler/`).

Helps with rust-lang#81930.

r? `@Mark-Simulacrum`

…eGomez

Update Source Serif to release 4.004

Now the family name is Source Serif 4 (upstream issue 77) instead of Source Serif Pro.

…order-shuffle, r=jyn514

List trait impls before deref methods in doc's sidebar

This PR is acting directly on a suggestion made by ```````@jyn514``````` in rust-lang#83133. I've tested the changes locally, and can confirm that it does in fact properly achieve what he thought it would. This PR also in turn closes rust-lang#83133.

…ine-for-ip, r=m-ou-se

Add `#[inline]` to IpAddr methods

Add some inlines to trivial methods of IpAddr
Closes rust-lang#77583

Render destructured struct function param names as underscore

Fixes rust-lang#83852

r? ````@GuillaumeGomez````

Don't report disambiguator error if link would have been ignored

Fixes rust-lang#83859.

This prevents us from warning on links such as `<hello@example.com>`.
Note that we still warn on links such as `<hello@localhost>` because
they have no dots in them. However, the links will still work, even
though a warning is reported.

r? ````@jyn514````