…args

Rough timeline:

* The longer `.content .item-info` selector originated in
  110e727. No reason seems to be given in
  the PR why it needed the `.content` part, but it was probably added because
  of <https://github.com/rust-lang/rust/blob/110e7270ab7b0700ce714b8b1c7e509195dea2c4/src/librustdoc/html/static/rustdoc.css#L476-L478>.
  That selector with the margin-bottom was removed when CSS containment
  was added in 8846c08.
* `.stability` was renamed `.item-info` in
  caf6c57.
* The selector without the `.content` was added in
  d48a39a.

If a lang feature gets declared twice, like for example as
a result of a mistake during stabilization, emit an error
in tidy. Library features already have this logic.

Support casting boxes to dyn*

Boxes have a pointer type at codegen time which LLVM does not allow to be transparently converted to an integer. Work around this by inserting a `ptrtoint` instruction if the argument is a pointer.

r? ``@compiler-errors``

Fixes rust-lang#102427

rustc_target: Fix json target specs using LLD linker flavors in link args

Fixes rust-lang#101988 (comment) (a regression introduced by rust-lang#101988).

…-DPC

should-skip-this: add missing backslash

I screwed this up in rust-lang#102780.

r? ``@Mark-Simulacrum``

…4, r=TaKO8Ki

Add test for issue 102964

Fixes rust-lang#102964

…, r=jyn514

tidy: error if a lang feature is already present

If a lang feature gets declared twice, like for example as a result of a mistake during stabilization, emit an error in tidy. Library features already have this logic.

Inspired by a mistake done during `half_open_range_patterns` stabilization: https://github.com/rust-lang/rust/pull/102275/files#r991292215

The PR requires rust-lang#102883 to be merged before CI turns green because the check is doing its job.

For reviewers, I suggest [turning off whitespace changes](https://github.com/rust-lang/rust/pull/102971/files?w=1) in the diff by adding `?w=1` to the url, as a large part of the diff is just about removing one level of indentation.

…s, r=JohnTitor

Fix small word dupe typos

…llaumeGomez

rustdoc: merge separate `.item-info` CSS

Rough timeline:

* The longer `.content .item-info` selector originated in 110e727. No reason seems to be given in the PR why it needed the `.content` part, but it was probably added because of <https://github.com/rust-lang/rust/blob/110e7270ab7b0700ce714b8b1c7e509195dea2c4/src/librustdoc/html/static/rustdoc.css#L476-L478>. That selector with the margin-bottom was removed when CSS containment was added in 8846c08.
* `.stability` was renamed `.item-info` in caf6c57.
* The selector without the `.content` was added in d48a39a.