Rollup of 8 pull requests #141567

jhpratt · 2025-05-26T01:38:20Z

Successful merges:

Implement normalize_lexically #134696 (Implement normalize_lexically)
Simplify attribute_groups #140539 (Simplify attribute_groups)
[rustdoc] Unify type aliases rendering with other ADT #140863 ([rustdoc] Unify type aliases rendering with other ADT)
Clarify WTF-8 safety docs #140936 (Clarify WTF-8 safety docs)
Specify that split_ascii_whitespace uses the same definition as is_ascii_whitespace #140952 (Specify that split_ascii_whitespace uses the same definition as is_ascii_whitespace)
Attempt to improve the std::fs::create_dir_all docs related to atomicity #141472 (Attempt to improve the std::fs::create_dir_all docs related to atomicity)
ci: move PR job x86_64-gnu-tools to codebuild #141502 (ci: move PR job x86_64-gnu-tools to codebuild)
const-check: stop recommending the use of rustc_allow_const_fn_unstable #141559 (const-check: stop recommending the use of rustc_allow_const_fn_unstable)

r? @ghost
@rustbot modify labels: rollup

…cii_whitespace

There only needs to be one `Fn` per symbol, not multiple.

Some are too long (> 100 chars), some are too short, some are missing full stops, some are missing upper-case letters at the start of sentences.

In several files they are entirely unnecessary, with the relevant names already imported. And in a few I have added the necessary `use` item.

…=workingjubilee Implement `normalize_lexically` Implements rust-lang#134694 This is, I think, the most straightforward implementation I could do, which will hopefully more easily allow experimentation if we decide to change the design here.

…ups, r=jdonszelmann Simplify `attribute_groups` It's more complicated than it needs to be. r? ``@jdonszelmann``

…der, r=lolbinarycat [rustdoc] Unify type aliases rendering with other ADT Fixes rust-lang#140739. Better reviewed one commit at a time. Just one thing I'm wondering: should we also render non-`repr` attributes? If so, I wonder if we shouldn't simply change `clean::TypeAlias` to contain the other ADT directly (`Struct`, `Enum` and `Union`) and remove the `TypeAlias::generics` field. Can be done in a follow-up too. cc ``@camelid`` r? ``@notriddle``

…kingjubilee Clarify WTF-8 safety docs This PR is a follow-up to PR rust-lang#140159, which clarifies ~~two things~~: - the WTF-8 safety comment [was confusing](rust-lang#140159 (comment)), either surrogate condition is actually sufficient for safety, both are not required - ~~the private `os_str::Slice` type name is easily confused with `std::slice`~~ ~~Happy to bikeshed the `OsSlice` name, other alternatives are `OsStrSlice` and `StrSlice`. Now it's got a distinct name from `std::slice`, it's easy to search and replace.~~ cc ``@thaliaarchi`` ``@workingjubilee``

…tion, r=dtolnay Specify that split_ascii_whitespace uses the same definition as is_ascii_whitespace

Attempt to improve the `std::fs::create_dir_all` docs related to atomicity The original paragraph was added in rust-lang#124520. It doesn't match the actual code logic. It says "function returns an error" if "the parent components" _(which also implies directories)_ "have been created already". The code is as follows: https://github.com/rust-lang/rust/blob/e88e85463468ce5d5ce468414eb69e3b15fa8d42/library/std/src/fs.rs#L3146 https://github.com/rust-lang/rust/blob/e88e85463468ce5d5ce468414eb69e3b15fa8d42/library/std/src/fs.rs#L3160 These lines suppress all errors if any path component is a directory. I've updated the paragraph to mirror this.

…ld, r=Kobzol ci: move PR job x86_64-gnu-tools to codebuild

…_unstable, r=compiler-errors const-check: stop recommending the use of rustc_allow_const_fn_unstable I have seen way too many people see the compiler suggest this attribute and then just apply it without a second thought. This is bad. So let's just stop recommending it; for the rare case where someone needs it, they'll eventually ask us and that way we can be sure that it is truly needed. The dev-guide still also explains `rustc_allow_const_fn_unstable`. Cc ``@rust-lang/wg-const-eval``

jhpratt · 2025-05-26T01:38:31Z

@bors r+ rollup=never p=5

bors · 2025-05-26T01:38:33Z

📌 Commit 5a8cb6f has been approved by jhpratt

It is now in the queue for this repository.

bors · 2025-05-26T04:30:09Z

⌛ Testing commit 5a8cb6f with merge 95a2212...

bors · 2025-05-26T07:28:32Z

☀️ Test successful - checks-actions
Approved by: jhpratt
Pushing 95a2212 to master...

rust-timer · 2025-05-26T07:31:02Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#134696	Implement `normalize_lexically`	`22068098447527f2c5f859758a5151100739932e` (link)
#140539	Simplify `attribute_groups`	`1c9d8480b5c7106911021f4e3d8c9a6fb2962bc6` (link)
#140863	[rustdoc] Unify type aliases rendering with other ADT	`5c8352561cb4f25b5fc95898847dee1cebc67951` (link)
#140936	Clarify WTF-8 safety docs	`c2e3bda73c7bd3e0e986e80b6778f313e1086334` (link)
#140952	Specify that split_ascii_whitespace uses the same definitio…	`ad0c0d0945c343145459a3f35356b93abca057ec` (link)
#141472	Attempt to improve the `std::fs::create_dir_all` docs relat…	`7519fa8e52a3ea508881fd780e9cb4f17b79579e` (link)
#141502	ci: move PR job x86_64-gnu-tools to codebuild	`6e8736bf3f37dc82edd5d3613f63ac9a41c9f5e0` (link)
#141559	const-check: stop recommending the use of rustc_allow_const…	`a388bea4c6123257432624ac791de1f9c17d177b` (link)

previous master: 46264e6dfd

In the case of a perf regression, run the following command for each PR you suspect might be the cause: @rust-timer build $SHA

github-actions · 2025-05-26T07:32:13Z

What is this?

This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.

Comparing 46264e6 (parent) -> 95a2212 (this PR)

Test differences

Show 496 test diffs

Stage 0

normalize_lexically: [missing] -> pass (J3)

Stage 1

[rustdoc] tests/rustdoc/type-alias/repr.rs: [missing] -> pass (J0)
normalize_lexically: [missing] -> pass (J1)

Stage 2

[rustdoc] tests/rustdoc/type-alias/repr.rs: [missing] -> pass (J2)

Additionally, 492 doctest diffs were found. These are ignored, as they are noisy.

Job group index

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 95a2212587f1b8500af1ac630322b0cb2e030c61 --output-dir test-dashboard

And then open test-dashboard/index.html in your browser to see an overview of all executed tests.

Job duration changes

aarch64-apple: 4225.7s -> 5398.1s (27.7%)
x86_64-apple-2: 5459.0s -> 6631.5s (21.5%)
dist-x86_64-apple: 9682.9s -> 8095.9s (-16.4%)
aarch64-gnu-debug: 3985.5s -> 4634.9s (16.3%)
dist-aarch64-apple: 5284.8s -> 6139.9s (16.2%)
dist-apple-various: 7001.8s -> 7801.0s (11.4%)
x86_64-apple-1: 7268.8s -> 7727.7s (6.3%)
x86_64-msvc-ext3: 7826.5s -> 7390.1s (-5.6%)
dist-x86_64-illumos: 5816.9s -> 5537.6s (-4.8%)
x86_64-gnu-llvm-20-3: 6973.8s -> 7292.6s (4.6%)

How to interpret the job duration changes?

Job durations can vary a lot, based on the actual runner instance
that executed the job, system noise, invalidated caches, etc. The table above is provided
mostly for t-infra members, for simpler debugging of potential CI slow-downs.

rust-timer · 2025-05-26T09:08:55Z

Finished benchmarking commit (95a2212): comparison URL.

Overall result: ❌ regressions - please read the text below

Our benchmarks found a performance regression caused by this PR.
This might be an actual regression, but it can also be just noise.

Next Steps:

If the regression was expected or you think it can be justified,
please write a comment with sufficient written justification, and add
@rustbot label: +perf-regression-triaged to it, to mark the regression as triaged.
If you think that you know of a way to resolve the regression, try to create
a new PR with a fix for the regression.
If you do not understand the regression or you think that it is just noise,
you can ask the @rust-lang/wg-compiler-performance working group for help (members of this group
were already notified of this PR).

@rustbot label: +perf-regression
cc @rust-lang/wg-compiler-performance

Instruction count

This is the most reliable metric that we have; it was used to determine the overall result at the top of this comment. However, even this metric can sometimes exhibit noise.

	mean	range	count
Regressions ❌ (primary)	3.0%	[3.0%, 3.0%]	1
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	3.0%	[3.0%, 3.0%]	1

Max RSS (memory usage)

Results (primary 3.2%, secondary -3.0%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	3.2%	[3.2%, 3.2%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.0%	[-4.9%, -1.1%]	2
All ❌✅ (primary)	3.2%	[3.2%, 3.2%]	1

Cycles

Results (primary 3.0%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	3.0%	[3.0%, 3.0%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	3.0%	[3.0%, 3.0%]	1

Binary size

Results (primary 1.1%, secondary 0.0%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.1%	[1.1%, 1.1%]	1
Regressions ❌ (secondary)	0.0%	[0.0%, 0.0%]	4
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.1%	[1.1%, 1.1%]	1

Bootstrap: 776.159s -> 776.359s (0.03%)
Artifact size: 366.24 MiB -> 366.28 MiB (0.01%)

lqd · 2025-05-26T20:31:46Z

clap_derive is noisy, and has since gone back to its previous state.

This PR is the last peak

rylev · 2025-05-27T13:27:03Z

Because of the previous comment:

@rustbot label: +perf-regression-triaged

SimonSapin and others added 26 commits May 12, 2025 18:43

Specify that split_ascii_whitespace uses the same definition as is_as…

9a0c856

…cii_whitespace

Fix confusing WTF surrogate safety docs

8f0522d

Introduce some typedefs to improve readability.

e139d26

Simplify Accepts.

5b808b7

There only needs to be one `Fn` per symbol, not multiple.

Fix up some comments.

1525f54

Some are too long (> 100 chars), some are too short, some are missing full stops, some are missing upper-case letters at the start of sentences.

Avoid rustc_span:: qualifiers.

354b1cb

In several files they are entirely unnecessary, with the relevant names already imported. And in a few I have added the necessary `use` item.

ci: move PR job x86_64-gnu-tools to codebuild

ec5e841

improve the std::fs::create_dir_all docs related to atomicity

6d47489

Implement normalize lexically

c299e29

Rename clean::Enum::variants method into non_stripped_variants

5f857a9

Unify rendering of type aliases without ADT items

560aec1

Split Item::attributes method into three

4194745

Rename the document_* argument/field into is_type_alias

eb9f054

Tweak attribute rendering depending on wether or not it is a type alias

4f3dd7b

Add regression test for rust-lang#140739

2b292d1

Improve code

3646a09

Update to new API

ec97b0f

const-check: stop recommending the use of rustc_allow_const_fn_unstable

cf9ac0e

Rollup merge of rust-lang#140539 - nnethercote:simplify-attribute_gro…

761e546

…ups, r=jdonszelmann Simplify `attribute_groups` It's more complicated than it needs to be. r? ``@jdonszelmann``

Rollup merge of rust-lang#140952 - SimonSapin:ascii_whitespace_defini…

8624f9c

…tion, r=dtolnay Specify that split_ascii_whitespace uses the same definition as is_ascii_whitespace

Rollup merge of rust-lang#141502 - marcoieni:x86_64-gnu-tools-codebui…

905b46a

…ld, r=Kobzol ci: move PR job x86_64-gnu-tools to codebuild

rustbot added A-attributes Area: Attributes (`#[…]`, `#![…]`) A-rustdoc-json Area: Rustdoc JSON backend A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 26, 2025

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 26, 2025

bors added the merged-by-bors This PR was explicitly merged by bors. label May 26, 2025

bors merged commit 95a2212 into rust-lang:master May 26, 2025
8 checks passed

rustbot added this to the 1.89.0 milestone May 26, 2025

This was referenced May 26, 2025

rustdoc: hide #[repr] if it isn't part of the public ABI #116882

Open

Stabilise os_string_pathbuf_leak #137992

Open

add test to reproduce #137687 and add a hotfix #140584

Draft

rustbot added the perf-regression Performance regression. label May 26, 2025

jhpratt deleted the rollup-uuhcmci branch May 26, 2025 18:48

rustbot added the perf-regression-triaged The performance regression has been triaged. label May 27, 2025

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Rollup of 8 pull requests #141567

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Test differences

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Stage 1

Stage 2

Job duration changes

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rust-timer commented May 26, 2025

Overall result: ❌ regressions - please read the text below

Instruction count

Max RSS (memory usage)

Cycles

Binary size

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