Rollup of 8 pull requests by GuillaumeGomez · Pull Request #159748 · rust-lang/rust

GuillaumeGomez · 2026-07-22T22:29:30Z

Successful merges:

Abort const-eval queries early when there are generics in the type #159504 (Abort const-eval queries early when there are generics in the type)
std: fix Xous UDP recv length over-report and OOB panic #159523 (std: fix Xous UDP recv length over-report and OOB panic)
Add fallback for intrinsics::fabs #159605 (Add fallback for intrinsics::fabs)
bump std libc to 0.2.189 #159699 (bump std libc to 0.2.189)
Add new variant to iterating-updating-mutref borrowck test #159306 (Add new variant to iterating-updating-mutref borrowck test)
fs::hard_link: use linkat on Android #159346 (fs::hard_link: use linkat on Android)
Consider () as suspicious only when expecting ! for runtime symbols #159513 (Consider () as suspicious only when expecting ! for runtime symbols)
Document the link_section attribute #159734 (Document the link_section attribute)

recv_inner returned the datagram length instead of the bytes copied into the caller's buffer, and rxlen >= 4075 could index past the receive buffer and panic. Clamp the count to both buffers, mirroring the earlier send_to fix.

Signed-off-by: wanglei <wllenyj@gmail.com>

Signed-off-by: Amirhossein Akhlaghpour <m9.akhlaghpoor@gmail.com>

@BoxyUwU

…,Nadrieril Abort const-eval queries early when there are generics in the type Since [recently](rust-lang#156977), const validation has a `has_param` check, which means ConstToPat also implicitly has that check. But it seems better to check this again explicitly here rather then rely on an undocumented property of some other component. The new test behaves the same with or without the PR. I recommend hiding whitespace difference, since rustfmt re-indendet a bunch of stuff. Fixes rust-lang#150296 r? @BoxyUwU

std: fix Xous UDP recv length over-report and OOB panic recv_inner returned the datagram length instead of the bytes copied into the caller's buffer, and rxlen >= 4075 could index past the receive buffer and panic. Clamp the count to both buffers, as in rust-lang#158928.

Add fallback for `intrinsics::fabs` Add a fallback for the `fabs` intrinsic. Because it uses const traits and const ops it required adding `rustc_const_unstable` -- i'm not certain it's right but it seems to make sense. I also added `#[miri::intrinsic_fallback_is_spec]`, though im not sure if I need to modify the const eval code to remove `fabs` handling or to remove it from any of the backends r? folkertdev

bump std libc to 0.2.189 Upgrade the std libc version to the latest `v0.2.189` from `v0.2.185`. There are too many changes between `v0.2.186` and `v0.2.187`, I'm not sure if `libc`'s update strategy is one version at a time, or if it allows upgrading multiple versions at once. I now need to resolve the CI failure caused by `libc::SO_KEEPALIVE` in the `socket2` crate for rust-lang/socket2#666 ``` hide running `cargo check -Z build-std=std,panic_abort --target thumbv8m.main-nuttx-eabihf --no-default-features` on socket2 (1/2) Updating crates.io index Locking 3 packages to latest compatible versions Downloading crates ... Downloaded libc v0.2.189 Updating crates.io index Downloading crates ... Downloaded addr2line v0.27.0 Downloaded foldhash v0.2.0 Downloaded getopts v0.2.24 Downloaded cfg-if v1.0.4 Downloaded memchr v2.7.6 Downloaded rustc-literal-escaper v0.0.8 Downloaded object v0.39.1 Downloaded rustc-demangle v0.1.28 Downloaded libc v0.2.185 Downloaded adler2 v2.0.1 Downloaded gimli v0.34.0 Downloaded hashbrown v0.17.1 Downloaded miniz_oxide v0.9.1 Compiling compiler_builtins v0.1.160 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/compiler-builtins/compiler-builtins) Compiling core v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core) Compiling libc v0.2.185 Compiling object v0.39.1 Compiling std v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std) Compiling libc v0.2.189 Compiling rustc-std-workspace-core v1.99.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core) Compiling alloc v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc) Compiling adler2 v2.0.1 Compiling memchr v2.7.6 Compiling unwind v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/unwind) Compiling cfg-if v1.0.4 Compiling rustc-demangle v0.1.28 Compiling panic_abort v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/panic_abort) Compiling rustc-literal-escaper v0.0.8 Compiling rustc-std-workspace-alloc v1.99.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-alloc) Compiling panic_unwind v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/panic_unwind) Compiling gimli v0.34.0 Compiling hashbrown v0.17.1 Compiling miniz_oxide v0.9.1 Compiling std_detect v0.1.5 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std_detect) Compiling addr2line v0.27.0 error[E0425]: cannot find value `SO_KEEPALIVE` in crate `libc` --> /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/net/connection/socket/unix.rs:462:59 | 462 | unsafe { setsockopt(self, libc::SOL_SOCKET, libc::SO_KEEPALIVE, keepalive as c_int) } | ^^^^^^^^^^^^ not found in `libc` error[E0425]: cannot find value `SO_KEEPALIVE` in crate `libc` --> /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/net/connection/socket/unix.rs:466:76 | 466 | let raw: c_int = unsafe { getsockopt(self, libc::SOL_SOCKET, libc::SO_KEEPALIVE)? }; | ^^^^^^^^^^^^ not found in `libc` ```

…-variant, r=lqd Add new variant to iterating-updating-mutref borrowck test This is a useful variant to consider when porting to a-mir-formality. r? lqd

@chriswailes

fs::hard_link: use linkat on Android According to rust-lang@6249cda, `linkat` needs API level 21. That is ancient (2014, Android 5). Our [target page](https://doc.rust-lang.org/rustc/platform-support/android.html) does not say which minimum Android version or API level we support, it just says: > Rust will support the most recent Long Term Support (LTS) Android Native Development Kit (NDK). By default Rust will support all API levels supported by the NDK, but a higher minimum API level may be required if deemed necessary. That's pretty useless as I have no idea how I'd figure out what the "API levels support by the NDK" are. Cc @chriswailes @jfgoog @maurer @pirama-arumuga-nainar Fixes rust-lang/miri#5080

…e1-dead Consider `()` as suspicious only when expecting `!` for runtime symbols Consider `()` as suspicious only when expecting `!` for runtime symbols, as `!` is considered ABI compatible in Rust with `()` (rust-lang#159446 (comment)). Fixes rust-lang#159446

@GuillaumeGomez

…te, r=GuillaumeGomez Document the link_section attribute Part of rust-lang#157604 r? @GuillaumeGomez

GuillaumeGomez · 2026-07-22T22:29:39Z

@bors r+ p=5 rollup=never

Trying commonly failed jobs
@bors try jobs=dist-various-1,test-various,x86_64-gnu-aux,x86_64-gnu-llvm-21-3,x86_64-msvc-1,aarch64-apple,x86_64-mingw-1,i686-msvc-*

rust-bors · 2026-07-22T22:29:41Z

📌 Commit d45af32 has been approved by GuillaumeGomez

It is now in the queue for this repository.

Rollup of 8 pull requests try-job: dist-various-1 try-job: test-various try-job: x86_64-gnu-aux try-job: x86_64-gnu-llvm-21-3 try-job: x86_64-msvc-1 try-job: aarch64-apple try-job: x86_64-mingw-1 try-job: i686-msvc-*

rust-bors · 2026-07-23T01:40:30Z

☀️ Try build successful (CI)
Build commit: a356c71 (a356c71cb5c55253e1f3e83d788aa7a10ddae302)
Base parent: ae3bbe7 (ae3bbe78ec2a9bb57a03f10ad6ee0388e12bcefb)

rust-bors · 2026-07-23T05:25:50Z

☀️ Test successful - CI
Approved by: GuillaumeGomez
Duration: 3h 17m 29s
Pushing 390279b to main...

rust-timer · 2026-07-23T05:28:17Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#159504	Abort const-eval queries early when there are generics in t…	`87c69ad70bb7b6fc3f6b40c9a76164836241278a` (link)
#159523	std: fix Xous UDP recv length over-report and OOB panic	`6a9f40631b1d72eada6246c20645a821831a89c5` (link)
#159605	Add fallback for `intrinsics::fabs`	`c1d8236edc6faf44c8021683ac5df03fbfb8459d` (link)
#159699	bump std libc to 0.2.189	`1a428f734a6ea31e60a0121a9d5c714c3c5b6800` (link)
#159306	Add new variant to iterating-updating-mutref borrowck test	`b4fa15cf3ee8d1167862fa495c3aa0429f7a5d91` (link)
#159346	fs::hard_link: use linkat on Android	`066c987ce112a09b84b1b1998eef63e1a0e1e9de` (link)
#159513	Consider `()` as suspicious only when expecting `!` for run…	`92044e98c753cad30b121b07b241d524b07c8635` (link)
#159734	Document the link_section attribute	`16f92f5bc11263037eaadb76755733002ad56cd1` (link)

previous master: e7795af6d2

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 · 2026-07-23T05:28:38Z

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 e7795af (parent) -> 390279b (this PR)

Test differences

Show 25 test diffs

Stage 1

[ui] tests/ui/pattern/generic-in-path.rs: [missing] -> pass (J0)
[ui (polonius)] tests/ui/pattern/generic-in-path.rs: [missing] -> pass (J1)

Stage 2

[ui] tests/ui/pattern/generic-in-path.rs: [missing] -> pass (J2)

Additionally, 22 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 390279b302ca98ae270f434100ae3730531d1246 --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

i686-gnu-2: 54m 40s -> 1h 39m (+82.4%)
x86_64-mingw-1: 1h 56m -> 2h 56m (+50.9%)
x86_64-gnu-llvm-21-3: 1h 15m -> 1h 50m (+46.9%)
i686-gnu-1: 1h 36m -> 2h 20m (+45.2%)
dist-i586-gnu-i586-i686-musl: 1h 31m -> 2h 5m (+37.3%)
x86_64-gnu-llvm-21-2: 1h 34m -> 1h 3m (-32.8%)
dist-sparcv9-solaris: 1h 11m -> 1h 34m (+32.5%)
i686-gnu-nopt-1: 1h 48m -> 2h 21m (+31.0%)
dist-x86_64-freebsd: 1h 7m -> 1h 26m (+29.4%)
dist-powerpc64le-linux-musl: 1h 13m -> 1h 34m (+29.2%)

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 · 2026-07-23T06:07:53Z

Finished benchmarking commit (390279b): comparison URL.

Overall result: ❌✅ regressions and improvements - no action needed

@rustbot label: -perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.6%	[0.6%, 0.6%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.6%	[-0.6%, -0.6%]	2
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -2.2%, secondary -0.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.2%	[1.5%, 5.4%]	5
Improvements ✅ (primary)	-2.2%	[-2.2%, -2.2%]	1
Improvements ✅ (secondary)	-3.0%	[-6.0%, -1.3%]	8
All ❌✅ (primary)	-2.2%	[-2.2%, -2.2%]	1

Cycles

Results (secondary 2.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	5.0%	[3.4%, 6.6%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.6%	[-3.6%, -3.6%]	1
All ❌✅ (primary)	-	-	0

Binary size

Results (primary 0.2%, secondary 0.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	0.2%	[0.1%, 0.2%]	4
Regressions ❌ (secondary)	0.1%	[0.1%, 0.2%]	5
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.2%	[0.1%, 0.2%]	4

Bootstrap: 486.654s -> 486.724s (0.01%)
Artifact size: 387.58 MiB -> 387.61 MiB (0.01%)

jackh726 and others added 19 commits July 15, 2026 13:36

Add new variant to iterating-updating-mutref test

9d7c5f0

fs::hard_link: use linkat on Android

038a55a

Add fallback for fabs

74fb1f9

std: fix Xous UDP recv length over-report and OOB panic

bb4f000

recv_inner returned the datagram length instead of the bytes copied into the caller's buffer, and rxlen >= 4075 could index past the receive buffer and panic. Clamp the count to both buffers, mirroring the earlier send_to fix.

bump std libc to 0.2.189

4e634f6

Signed-off-by: wanglei <wllenyj@gmail.com>

add test for a sneaky generic in a pattern

e96b538

remove unused parameter from ensure_monomorphic_enough

a9d7243

const-eval: early-reject constants with generics in their type

bb1991d

const-to-pat: double-check that no generics snuck through

bb3d6e9

docs: document the link_section attribute

1bd9df0

Signed-off-by: Amirhossein Akhlaghpour <m9.akhlaghpoor@gmail.com>

Consider () as suspicious only when expecting ! for runtime symbols

970a689

Rollup merge of rust-lang#159306 - jackh726:iterating-updating-mutref…

b8852a6

…-variant, r=lqd Add new variant to iterating-updating-mutref borrowck test This is a useful variant to consider when porting to a-mir-formality. r? lqd

Rollup merge of rust-lang#159734 - amirHdev:docs-link-section-attribu…

d45af32

…te, r=GuillaumeGomez Document the link_section attribute Part of rust-lang#157604 r? @GuillaumeGomez

rust-bors Bot added the rollup A PR which is a rollup label Jul 22, 2026

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Jul 22, 2026

rust-bors Bot 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 Jul 22, 2026

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rust-bors Bot added merged-by-bors This PR was explicitly merged by bors. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Jul 23, 2026

rust-bors Bot merged commit 390279b into rust-lang:main Jul 23, 2026
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rustbot added this to the 1.99.0 milestone Jul 23, 2026

rust-bors Bot mentioned this pull request Jul 23, 2026

Enable polonius alpha on nightly #159343

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GuillaumeGomez deleted the rollup-9nyJVea branch July 23, 2026 09:37

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Rollup of 8 pull requests#159748

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Overall result: ❌✅ regressions and improvements - no action needed

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