see rust-lang#124941 (comment)

the current title is too similar to that of the page for
std::result::Result, which is a problem both for
navigating to the Result docs via browser autocomplete, and for
being able to tell which tab is which when the width of tabs is
small.

This has been bugging me for a while. I find complex "if any of these
are true" conditions easier to think about than complex "if all of these
are true" conditions, because you can stop as soon as one is true.

It has a single call site. This change makes the two `needs_collect`
conditions more similar to each other, and therefore easier to
understand.

And make it non-`pub`.

I have always found `is_complete` an unhelpful name. The new name (and
inverted sense) fits in better with the conditions at its call sites.

The current code is this:
```
self.capture_state.replace_ranges.push((start_pos..end_pos, Some(target)));
self.capture_state.replace_ranges.extend(inner_attr_replace_ranges);
```
What's not obvious is that every range in `inner_attr_replace_ranges`
must be a strict sub-range of `start_pos..end_pos`. Which means, in
`LazyAttrTokenStreamImpl::to_attr_token_stream`, they will be done
first, and then the `start_pos..end_pos` replacement will just overwrite
them. So they aren't needed.

Imagine you have replace ranges (2..20,X) and (5..15,Y), and these tokens:
```
a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x
```
If we replace (5..15,Y) first, then (2..20,X) we get this sequence
```
a,b,c,d,e,Y,_,_,_,_,_,_,_,_,_,p,q,r,s,t,u,v,w,x
a,b,X,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,u,v,w,x
```
which is what we want.

If we do it in the other order, we get this:
```
a,b,X,_,_,_,_,_,_,_,_,_,_,_,_,p,q,r,s,t,u,v,w,x
a,b,X,_,_,Y,_,_,_,_,_,_,_,_,_,_,_,_,_,_,u,v,w,x
```
which is wrong. So it's true that we need the `.rev()` but the comment
is wrong about why.

A fully imperative style is easier to read than a half-iterator,
half-imperative style. Also, rename `inner_attr` as `attr` because it
might be an outer attribute.

This was handled correctly already for `extern unsafe fn()`.

Co-authored-by: Folkert <folkert@folkertdev.nl>

…tr, r=dtolnay

Stabilize const `{integer}::from_str_radix` i.e. `const_int_from_str`

This PR stabilizes the feature `const_int_from_str`.

- ACP Issue: rust-lang/libs-team#74
- Implementation PR: rust-lang#99322
- Part of Tracking Issue: rust-lang#59133

API Change Diff:

```diff
impl {integer} {
- pub       fn from_str_radix(src: &str, radix: u32) -> Result<Self, ParseIntError>;
+ pub const fn from_str_radix(src: &str, radix: u32) -> Result<Self, ParseIntError>;
}

impl ParseIntError {
- pub       fn kind(&self) -> &IntErrorKind;
+ pub const fn kind(&self) -> &IntErrorKind;
}
```
This makes it easier to parse integers at compile-time, e.g.
the example from the Tracking Issue:

```rust
env!("SOMETHING").parse::<usize>().unwrap()
```

could now be achived  with

```rust
match usize::from_str_radix(env!("SOMETHING"), 10) {
  Ok(val) => val,
  Err(err) => panic!("Invalid value for SOMETHING environment variable."),
}
```

rather than having to depend on a library that implements or manually implement the parsing at compile-time.

---

Checklist based on [Libs Stabilization Guide - When there's const involved](https://std-dev-guide.rust-lang.org/development/stabilization.html#when-theres-const-involved)

I am treating this as a [partial stabilization](https://std-dev-guide.rust-lang.org/development/stabilization.html#partial-stabilizations) as it shares a tracking issue (and is rather small), so directly opening the partial stabilization PR for the subset (feature `const_int_from_str`) being stabilized.

- [x] ping Constant Evaluation WG
- [x] no unsafe involved
- [x] no `#[allow_internal_unstable]`
- [ ] usage of `intrinsic::const_eval_select` rust-lang#124625 in `from_str_radix_assert` to change the error message between compile-time and run-time
- [ ] [rust-labg/libs-api FCP](rust-lang#124941 (comment))

…li-obk

Implement `Copy`/`Clone` for async closures

We can do so in the same cases that regular closures do.

For the purposes of cloning, coroutine-closures are actually precisely the same as regular closures, specifically in the aspect that `Clone` impls care about which is the upvars. The only difference b/w coroutine-closures and regular closures is the type that they *return*, but this type has not been *created* yet, so we don't really have a problem.

IDK why I didn't add this impl initially -- I went back and forth a bit on the internal representation for coroutine-closures before settling on a design which largely models regular closures. Previous (not published) iterations of coroutine-closures used to be represented as a special (read: cursed) kind of coroutine, which would probably suffer from the pitfalls that coroutines have that oli mentioned below in rust-lang#128201 (comment).

r? oli-obk

… r=notriddle,GuillaumeGomez

rustdoc: change title of search results

the current title is too similar to that of the page for std::result::Result, which is a problem both for
navigating to the Result docs via browser autocomplete, and for being able to tell which tab is which when the width of tabs is small.

…s, r=petrochenkov

Refactor complex conditions in `collect_tokens_trailing_token`

More readability improvements for this complicated function.

r? ````@petrochenkov````

…r=petrochenkov

Remove unnecessary range replacements

This PR removes an unnecessary range replacement in `collect_tokens_trailing_token`, and does a couple of other small cleanups.

r? ````@petrochenkov````

…etrochenkov

Remove redundant option that was just encoding that a slice was empty

There is already a sanity check ensuring we don't put empty attribute lists into the HIR:

https://github.com/rust-lang/rust/blob/6ef11b81c2c02c3c4b7556d1991a98572fe9af87/compiler/rustc_ast_lowering/src/lib.rs#L661-L667

…ix, r=tgross35

CI: do not respect custom try jobs for unrolled perf builds

Before this PR, if a pull request merged in a rollup had some `try-job` annotations, the unrolled perf builds were running the custom try jobs instead of the default job, which was wrong.

Found out [here](https://rust-lang.zulipchat.com/#narrow/stream/242791-t-infra/topic/try-perf.20jobs.20respect.20try-job.20annotations).

…compiler-errors

Improve `extern "<abi>" unsafe fn()` error message

These errors were already reported in rust-lang#87217, and fixed by rust-lang#87235 but missed the case of an explicit ABI.

This PR does not cover multiple keywords like `extern "C" pub const unsafe fn()`, but I don't know what a good way to cover this  would be. It also seems rarer than `extern "C" unsafe` which I saw happen a few times in workshops.

…ocs, r=tgross35

Fix `Iterator::filter` docs

Small fix to add code formatting around `Iterator::filter` `true` return type