Rollup of 5 pull requests by JonathanBrouwer · Pull Request #155199 · rust-lang/rust

JonathanBrouwer · 2026-04-12T13:44:21Z

Successful merges:

miri subtree update #155197 (miri subtree update)
Fix ICE when reporting host-effect errors for const Fn HRTBs in next trait solver #154804 (Fix ICE when reporting host-effect errors for const Fn HRTBs in next trait solver)
Hexagon: add scalar arch-version target features (v60-v79, audio) #155014 (Hexagon: add scalar arch-version target features (v60-v79, audio))
Fix ICE in span_extend_prev_while with multibyte characters #155068 (Fix ICE in span_extend_prev_while with multibyte characters)
Use Vec::push_mut when adding a chunk to arenas #155161 (Use Vec::push_mut when adding a chunk to arenas)

This updates the rust-version file to c92036b.

Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: rust-lang/rust@c92036b Filtered ref: rust-lang/miri@a4b2f0c Upstream diff: rust-lang/rust@55e86c9...c92036b This merge was created using https://github.com/rust-lang/josh-sync.

Automatic Rustup

float test: double error tolerance with imprecise ops on both sides

This updates the rust-version file to bcded33.

Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: rust-lang/rust@bcded33 Filtered ref: rust-lang/miri@d2d41cf Upstream diff: rust-lang/rust@c92036b...bcded33 This merge was created using https://github.com/rust-lang/josh-sync.

Automatic Rustup

This updates the rust-version file to 30d0309.

Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: rust-lang/rust@30d0309 Filtered ref: rust-lang/miri@a005b63 Upstream diff: rust-lang/rust@bcded33...30d0309 This merge was created using https://github.com/rust-lang/josh-sync.

Automatic Rustup

genmc-sys: remove always_configure hack

Add target features corresponding to Hexagon LLVM CPU generations to complement the existing HVX vector features. These are needed for gating scalar intrinsics by architecture version. New features: audio, v60, v62, v65, v66, v67, v68, v69, v71, v73, v75, v79 Each version implies the previous (e.g. v68 implies v67 which implies v66, etc.), matching LLVM's ArchV60-ArchV79 subtarget features. Also adds hexagon revisions to the feature-hierarchy test to verify the implied feature chains work correctly.

fix the bitfield meanings of stacked_borrow item

This updates the rust-version file to 4c42051.

Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: 4c42051 Filtered ref: d09bed217e03a25403a0294a935c52309ae5d084 Upstream diff: rust-lang/rust@30d0309...4c42051 This merge was created using https://github.com/rust-lang/josh-sync.

Rustup

genmc tests: remove a hack that is no longer needed

Fix panic when multiple threads block on same fd

@ghost

miri subtree update Subtree update of `miri` to rust-lang/miri@871d3d0. Created using https://github.com/rust-lang/josh-sync. r? @ghost

…e, r=adwinwhite Fix ICE when reporting host-effect errors for const Fn HRTBs in next trait solver Avoid leaking bound vars into the diagnostic selection path for HRTB host-effect predicates. Closes rust-lang#151894 .

…atures, r=mati865 Hexagon: add scalar arch-version target features (v60-v79, audio) Add target features corresponding to Hexagon LLVM CPU generations to complement the existing HVX vector features. These are needed for gating scalar intrinsics by architecture version. New features: audio, v60, v62, v65, v66, v67, v68, v69, v71, v73, v75, v79 Each version implies the previous (e.g. v68 implies v67 which implies v66, etc.), matching LLVM's ArchV60-ArchV79 subtarget features. Also adds hexagon revisions to the feature-hierarchy test to verify the implied feature chains work correctly.

…i865 Fix ICE in `span_extend_prev_while` with multibyte characters Fixes rust-lang#155037 The function assumed that the character found by `rfind` was always one byte wide, using a hardcoded `1` instead of `c.len_utf8()`. When a multibyte character appeared immediately before the span, this caused the resulting span to point into the middle of a UTF-8 sequence, triggering an assertion failure in `bytepos_to_file_charpos`.

Use Vec::push_mut when adding a chunk to arenas This fixes rust-lang#155148, which may or may not be worth fixing on its own merits, but I think `Vec::push_mut` also makes the code nicer.

JonathanBrouwer · 2026-04-12T13:44:32Z

@bors r+ rollup=never p=5

rust-bors · 2026-04-12T13:44:36Z

📌 Commit bf4d385 has been approved by JonathanBrouwer

It is now in the queue for this repository.

rust-bors · 2026-04-12T17:08:29Z

☀️ Test successful - CI
Approved by: JonathanBrouwer
Duration: 3h 10m 37s
Pushing dab8d9d to main...

rust-timer · 2026-04-12T17:09:58Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#154804	Fix ICE when reporting host-effect errors for const Fn HRTB…	`f922105fc5ebcdc6096cfb8470ad39d04d655698` (link)
#155014	Hexagon: add scalar arch-version target features (v60-v79, …	`e4854862ad395b9d1230bc14ea35e984140b6570` (link)
#155068	Fix ICE in `span_extend_prev_while` with multibyte characte…	`4fae4a94031320dc3d0e871e40b35804136be5fe` (link)
#155161	Use Vec::push_mut when adding a chunk to arenas	`0d2ba34843310ea0973f7efea3b3c4df668f8995` (link)
#155197	miri subtree update	`27c99d0f8001a77b60f26d55145014d4767f7054` (link)

previous master: 532f8f1443

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 · 2026-04-12T17:11:32Z

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 532f8f1 (parent) -> dab8d9d (this PR)

Test differences

Show 13 test diffs

Stage 1

[ui] tests/ui/span/span-extend-prev-while-multibyte.rs: [missing] -> pass (J1)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-hvxv66: [missing] -> pass (J1)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-v60: [missing] -> pass (J1)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-v68: [missing] -> pass (J1)
[ui] tests/ui/traits/next-solver/diagnostics/const-host-effect-hrtb-no-ice.rs: [missing] -> pass (J1)

Stage 2

[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-hvxv66: [missing] -> ignore (gcc backend is marked as ignore) (J0)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-v60: [missing] -> ignore (gcc backend is marked as ignore) (J0)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-v68: [missing] -> ignore (gcc backend is marked as ignore) (J0)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-hvxv66: [missing] -> pass (J2)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-v60: [missing] -> pass (J2)
[ui] tests/ui/target-feature/feature-hierarchy.rs#hexagon-v68: [missing] -> pass (J2)
[ui] tests/ui/span/span-extend-prev-while-multibyte.rs: [missing] -> pass (J3)
[ui] tests/ui/traits/next-solver/diagnostics/const-host-effect-hrtb-no-ice.rs: [missing] -> pass (J3)

Job group index

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard dab8d9d1066c4c95008163c7babf275106ce3f32 --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

dist-aarch64-apple: 1h 40m -> 2h 22m (+41.4%)
aarch64-gnu-llvm-21-1: 1h 37m -> 59m 39s (-38.8%)
pr-check-1: 25m 5s -> 33m 9s (+32.1%)
x86_64-rust-for-linux: 45m -> 55m (+22.2%)
i686-gnu-1: 2h 1m -> 2h 24m (+19.4%)
x86_64-gnu-tools: 52m 22s -> 1h 1m (+18.0%)
dist-apple-various: 1h 41m -> 1h 24m (-17.1%)
test-various: 1h 53m -> 2h 10m (+15.2%)
x86_64-gnu-stable: 2h 7m -> 2h 26m (+14.7%)
optional-x86_64-gnu-parallel-frontend: 2h 21m -> 2h 39m (+12.9%)

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 · 2026-04-12T17:49:48Z

Finished benchmarking commit (dab8d9d): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This perf run didn't have relevant results for this metric.

Max RSS (memory usage)

Results (primary -0.6%, secondary -0.3%)

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

	mean	range	count
Regressions ❌ (primary)	2.4%	[2.4%, 2.4%]	1
Regressions ❌ (secondary)	2.5%	[1.9%, 3.2%]	3
Improvements ✅ (primary)	-2.2%	[-3.7%, -0.7%]	2
Improvements ✅ (secondary)	-3.2%	[-6.7%, -0.9%]	3
All ❌✅ (primary)	-0.6%	[-3.7%, 2.4%]	3

Cycles

Results (secondary 23.3%)

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)	23.3%	[23.3%, 23.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

Results (primary 0.0%, 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)	0.0%	[0.0%, 0.1%]	10
Regressions ❌ (secondary)	0.1%	[0.0%, 0.1%]	17
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.0%	[0.0%, 0.1%]	10

Bootstrap: 490.376s -> 489.963s (-0.08%)
Artifact size: 394.22 MiB -> 394.27 MiB (0.01%)

The Miri Cronjob Bot and others added 30 commits April 5, 2026 05:29

Prepare for merging from rust-lang/rust

446629d

This updates the rust-version file to c92036b.

float test: increase ULP tolerance

82b637b

Merge pull request rust-lang#4941 from rust-lang/rustup-2026-04-05

97010af

Automatic Rustup

float test: double error tolerance with imprecise ops on both sides

0b6423d

Merge pull request rust-lang#4942 from RalfJung/float-err-bounds

7f35239

float test: double error tolerance with imprecise ops on both sides

Prepare for merging from rust-lang/rust

7a501c5

This updates the rust-version file to bcded33.

fmt

51dec75

Merge pull request rust-lang#4945 from rust-lang/rustup-2026-04-07

0fbaf47

Automatic Rustup

Prepare for merging from rust-lang/rust

bff890b

This updates the rust-version file to 30d0309.

disable new build dir layout again due to problems

f373acf

Merge pull request rust-lang#4946 from rust-lang/rustup-2026-04-08

3fda203

Automatic Rustup

genmc-sys: remove always_configure hack

66580a3

Merge pull request rust-lang#4948 from RalfJung/genmc-always-configure

e44bb8d

genmc-sys: remove always_configure hack

fix: fix panic when multiple threads block on same fd

df1b8b8

docs: add comment when registering new source

3c4dfb4

feat: also check that received buffers match

beaf7ee

fix the bitfield meanings of stacked_borrow item

5c57c5a

Merge pull request rust-lang#4951 from KMiri-rs/stack-borrow-bitfields

a33321c

fix the bitfield meanings of stacked_borrow item

Prepare for merging from rust-lang/rust

630cdae

This updates the rust-version file to 4c42051.

re-enable new cargo build dir layout testing

4e6323b

Merge pull request rust-lang#4952 from RalfJung/rustup

5474218

Rustup

genmc tests: remove a hack that is no longer needed

c3c931a

remove unused type

a75e80c

Merge pull request rust-lang#4953 from RalfJung/hack-no-more

6428be1

genmc tests: remove a hack that is no longer needed

fix: implement feedback

4e7ec91

WhySoBad and others added 12 commits April 9, 2026 22:01

fix: fix doc comment

085e4f2

Fix ICE in span_extend_prev_while with multibyte characters

2754a83

fix: implement feedback

0b7f225

fix: deregister I/O sources in blocking I/O manager

6d4d7a6

Use Vec::push_mut when adding a chunk to arenas

ff61915

Handle leaked host-effect HRTBs before selection

0b02f67

Merge pull request rust-lang#4950 from WhySoBad/fix-blocking-io-manager

edf04e1

Fix panic when multiple threads block on same fd

Rollup merge of rust-lang#155197 - RalfJung:miri, r=RalfJung

fa6fedc

miri subtree update Subtree update of `miri` to rust-lang/miri@871d3d0. Created using https://github.com/rust-lang/josh-sync. r? @ghost

Rollup merge of rust-lang#155161 - saethlin:push_mut_saves, r=Kivooeo

bf4d385

Use Vec::push_mut when adding a chunk to arenas This fixes rust-lang#155148, which may or may not be worth fixing on its own merits, but I think `Vec::push_mut` also makes the code nicer.

rust-bors Bot added the rollup A PR which is a rollup label Apr 12, 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. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver) labels Apr 12, 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 Apr 12, 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 Apr 12, 2026

rust-bors Bot merged commit dab8d9d into rust-lang:main Apr 12, 2026
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rustbot added this to the 1.97.0 milestone Apr 12, 2026

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Rollup of 5 pull requests#155199

Rollup of 5 pull requests#155199
rust-bors[bot] merged 42 commits intorust-lang:mainfrom
JonathanBrouwer:rollup-OhWpGAc

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Overall result: no relevant changes - no action needed

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