it will be 4076 (from 5.4) or 128.

…ates too.

This reverts commit 16e10bf.

# Conflicts:
#	compiler/rustc_target/src/spec/apple_sdk_base.rs

remove unnecessary string searchings for checking if function arguments have `&` and `&mut`

net listen backlog set to negative on Linux.

it will be 4076 (from 5.4) or 128.

…ochenkov

Reenable disabled early syntax gates as future-incompatibility lints

- MCP: rust-lang/compiler-team#535

The approach taken by this PR is

- Introduce a new lint, `unstable_syntax_pre_expansion`, and reenable the early syntax gates to emit it
- Use the diagnostic stashing mechanism to stash warnings the early warnings
- When the hard error occurs post expansion, steal and cancel the early warning
- Don't display any stashed warnings if errors are present to avoid the same noise problem that hiding type ascription errors is avoiding

Commits are working commits, but in a coherent steps-to-implement manner. Can be squashed if desired.

The preexisting `soft_unstable` lint seems like it would've been a good fit, but it is deny-by-default (appropriate for `#[bench]`) and these gates should be introduced as warn-by-default.

It may be desirable to change the stash mechanism's behavior to not flush lint errors in the presence of other errors either (like is done for warnings here), but upgrading a stash-using lint from warn to error perhaps is enough of a request to see the lint that they shouldn't be hidden; additionally, fixing the last error to get new errors thrown at you always feels bad, so if we know the lint errors are present, we should show them.

Using a new flag/mechanism for a "weak diagnostic" which is suppressed by other errors may also be desirable over assuming any stashed warnings are "weak," but this is the first user of stashing warnings and seems an appropriate use of stashing (it follows the "know more later to refine the diagnostic" pattern; here we learn that it's in a compiled position) so we get to define what it means to stash a non-hard-error diagnostic.

cc `````@petrochenkov````` (seconded MCP)

add miri-test-libstd support to libstd

- The first commit mirrors what we already have in liballoc.
- The second commit adds some regression tests that only really make sense to be run in Miri, since they rely on Miri's extra checks to detect anything.
- The third commit makes the MPSC tests work in reasonable time in Miri by reducing iteration counts.
- The fourth commit silences some warnings due to code being disabled with `cfg(miri)`

…lcnr

Ban references to `Self` in trait object substs for projection predicates too.

Fixes rust-lang#100484
Fixes rust-lang#100485

r? ````@lcnr````

Revert "Revert "Allow dynamic linking for iOS/tvOS targets.""

This reverts commit 16e10bf (PR rust-lang#77716).

The original original PR enabled `cdylib` builds for iOS. However this caused problems because:

> This new feature in Rust 1.46 added a lot of headache for iOS builds with cdylib targets. cdylib target is near impossible to build if you are using any crate with native dependencies (ex. openssl, libsodium, zmq). You can't just find .so files for all architectures to perform correct linking. Usual workflow is the following:
>
> 1. You build staticlib and rely that native dependencies will be linked as frameworks later
> 2. You setup right cocoapods in ObjectiveC/Swift wrapper.
>
> As cargo doesn't support platform-dependent crate types rust-lang#4881 as a result a lot of projects now broken on Rust 1.46

However, this will be soon a thing of the past since 1.64 brings us the long awaited much anticipated `--crate-type` flag.

> I see that this got merged recently: rust-lang/cargo#10083. The --crate-type flag will get stabilized in 1.64. In 1.64, you could still get a successful iOS staticlib with cargo build --crate-type=statclib even if the crate has cdylib targets too. If I'm not mistaken, this solves the problem too so this PR could be reverted in 1.64 with relatively little headache.

So summing up, I think this PR can be reverted in 1.64. 🤞

[rustdoc] Fix item info display

Fixes  rust-lang#100369.

The solution I came up with was simply to wrap the "text part" of the `item-info` into another span so that `flex` wouldn't mess with it.

Live demo is [here](https://rustdoc.crud.net/imperio/fix-item-info/foo/struct.ItemInfo.html).

r? ``@jsha``

…o-trait-assoc-item, r=cjgillot

Suggest adding a reference to a trait assoc item

fixes rust-lang#100289

…me, r=TaKO8Ki

elaborate how revisions work with FileCheck stuff in src/test/codegen

elaborate how revisions work with FileCheck stuff in src/test/codegen

…searching, r=compiler-errors

Refactor: remove unnecessary string searchings

This patch removes unnecessary string searchings for checking if function arguments have `&` and `&mut`.