Rollup of 23 pull requests by JonathanBrouwer · Pull Request #163957 · rust-lang/rust

JonathanBrouwer · 2026-10-07T20:53:12Z

Successful merges:

Run LLDB debuginfo tests on x86_64-pc-windows-msvc in CI #163090 (Run LLDB debuginfo tests on x86_64-pc-windows-msvc in CI)
even more tests/crashes migration for -Znext-solver #163806 (even more tests/crashes migration for -Znext-solver)
Document the rustc_on_unimplemented attribute. #163508 (Document the rustc_on_unimplemented attribute.)
Use target_family = "wasm" instead of target_arch = "wasm32" #163794 (Use target_family = "wasm" instead of target_arch = "wasm32")
use the type name instead of Self in constructor paths again #163863 (use the type name instead of Self in constructor paths again)
Remove CLAUDE.md #163864 (Remove CLAUDE.md)
Add regression test for duplicated rustdoc search results between std and core #163877 (Add regression test for duplicated rustdoc search results between std and core)
Shrink PartialRes and its alignment #163916 (Shrink PartialRes and its alignment)
On name resolution error in parameter list, suggest possible const typo and avoid unnecessary second error #149753 (On name resolution error in parameter list, suggest possible const typo and avoid unnecessary second error)
Oneshot is_ready #152557 (Oneshot is_ready)
Stabilize optimize attribute #157273 (Stabilize optimize attribute)
peel_transparent_wrappers only works on non-1ZST #162000 (peel_transparent_wrappers only works on non-1ZST)
unit and [1 x unit] layouts are incompatible on big-endian targets #163343 (unit and [1 x unit] layouts are incompatible on big-endian targets)
perf:cache FFI safety results in improper_ctypes lint #163348 (perf:cache FFI safety results in improper_ctypes lint)
Move more rustdoc-html tests in the right location #163768 (Move more rustdoc-html tests in the right location)
check is_indirect_first_projection when replacing in RefProp #163778 (check is_indirect_first_projection when replacing in RefProp)
cg_llvm: Avoid as_c_char_ptr in several places #163789 (cg_llvm: Avoid as_c_char_ptr in several places)
Add has_reliable_f16b for Arm #163807 (Add has_reliable_f16b for Arm)
Switch TLS implementation for wasi and bump SDK version to 34 #163809 (Switch TLS implementation for wasi and bump SDK version to 34)
Update books #163826 (Update books)
ci: update to PowerShell 7.6.6 #163849 (ci: update to PowerShell 7.6.6)
INSTALL.md: use UCRT64 instead of MINGW64 in MSYS2 section #163869 (INSTALL.md: use UCRT64 instead of MINGW64 in MSYS2 section)
Add if-installed:auto:spellcheck to pre-push script #163870 (Add if-installed:auto:spellcheck to pre-push script)

r? @ghost

Create a similar rollup

This commit stabilizes the `#[optimize]` attribute, which allows for more fine-grained control of optimization levels.

…typo

…rors

This slightly improves support for the WASM64 architecture.

Signed-off-by: Connor Tsui <connor.tsui20@gmail.com>

Claude Code loads AGENTS.md since 2.1.277, released September 18. See https://code.claude.com/docs/en/changelog#2-1-277.

… and core

github-actions · 2026-10-08T00:18:42Z

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 1d81eb4 (parent) -> 33ffc9b (this PR)

Test differences

Show 1733 test diffs

Stage 1

[crashes] tests/crashes/135718.rs: pass -> [missing] (J1)
[crashes] tests/crashes/146965.rs: pass -> [missing] (J1)
[crashes] tests/crashes/148094.rs: pass -> [missing] (J1)
[ui] tests/ui/impl-trait/closures/in-closure-capture-ice-119786-1.rs#old: pass -> [missing] (J2)
[ui] tests/ui/impl-trait/normalize-hir-typeck/in-closure-capture-ice-125553.rs#old: [missing] -> pass (J2)
[ui] tests/ui/impl-trait/normalize-hir-typeck/trait-upcasting-131886.rs#old: [missing] -> pass (J2)
[ui] tests/ui/traits/next-solver/assembly/incomplete-guidance-normalize-impl-header.rs#next: [missing] -> pass (J2)
ascii::is_ascii::medium::case01_iter_all: pass -> [missing] (J3)
ascii::is_ascii::short::case03_align_to_unrolled: pass -> [missing] (J3)
ascii::is_ascii::unaligned_tail_long::case02_align_to: pass -> [missing] (J3)
ascii::is_ascii::unaligned_tail_medium::case03_align_to_unrolled: pass -> [missing] (J3)
ascii::long::case12_mask_shifted_bool_match_range: pass -> [missing] (J3)
ascii::long::is_ascii_alphabetic: pass -> [missing] (J3)
ascii::long::is_ascii_uppercase: pass -> [missing] (J3)
ascii::medium::case06_libcore: pass -> [missing] (J3)
ascii::medium::is_ascii_punctuation: pass -> [missing] (J3)
ascii::short::is_ascii_uppercase: pass -> [missing] (J3)
fmt::write_u128_max: pass -> [missing] (J3)
fmt::write_u64_max: pass -> [missing] (J3)
hash::sip::bench_u32_keyed: pass -> [missing] (J3)
iter::bench_enumerate_chain_ref_sum: pass -> [missing] (J3)
iter::bench_enumerate_ref_sum: pass -> [missing] (J3)
iter::bench_filter_map_ref_sum: pass -> [missing] (J3)
iter::bench_skip_chain_ref_sum: pass -> [missing] (J3)
num::dec2flt::bench_long_decimal_and_exp: pass -> [missing] (J3)
num::dec2flt::bench_min_normal: pass -> [missing] (J3)
num::flt2dec::strategy::grisu::bench_big_exact_3: pass -> [missing] (J3)
num::int_bits::u16::constant::extract_bits: pass -> [missing] (J3)
num::int_log::u16_log10_random: pass -> [missing] (J3)
num::int_log::u32_log10_random_small: pass -> [missing] (J3)
num::int_log::u8_log10_predictable: pass -> [missing] (J3)
num::int_sqrt::u16_sqrt_predictable: pass -> [missing] (J3)
pattern::find_char_long_match_end: pass -> [missing] (J3)
pattern::rfind_str: pass -> [missing] (J3)
pattern::starts_with_str: pass -> [missing] (J3)
slice::rotate_16_usize_4: pass -> [missing] (J3)
str::char_count::ru_medium::case00_libcore: pass -> [missing] (J3)
str::char_count::zh_huge::case00_libcore: pass -> [missing] (J3)
str::eq_ignore_ascii_case::bench_str_of_8_bytes_eq: pass -> [missing] (J3)
str::iter::chars_advance_by_1000: pass -> [missing] (J3)
[ui (polonius)] tests/ui/attributes/doc_examples/rustc_on_unimplemented_filter.rs: [missing] -> pass (J6)
[ui (polonius)] tests/ui/impl-trait/closures/incompatible-closure-captures-field-of-opaque.rs#old: pass -> [missing] (J6)

Stage 2

any::bench_downcast_ref: pass -> [missing] (J0)
ascii::is_ascii::medium::case01_iter_all: pass -> [missing] (J0)
ascii::is_ascii::medium::case04_while_loop: pass -> [missing] (J0)
ascii::is_ascii::unaligned_head_medium::case02_align_to: pass -> [missing] (J0)
ascii::is_ascii::unaligned_tail_medium::case03_align_to_unrolled: pass -> [missing] (J0)
ascii::medium::case00_alloc_only: pass -> [missing] (J0)
ascii::medium::case08_fake_simd_u64: pass -> [missing] (J0)
ascii::medium::case10_mask_mult_bool_lookup_table: pass -> [missing] (J0)
ascii::short::is_ascii_punctuation: pass -> [missing] (J0)
char::methods::bench_ascii_char_to_lowercase: pass -> [missing] (J0)
char::methods::bench_to_digit_radix_16: pass -> [missing] (J0)
fmt::write_i16_hex: pass -> [missing] (J0)
fmt::write_i32_oct: pass -> [missing] (J0)
hash::sip::bench_bytes_b_32: pass -> [missing] (J0)
iter::bench_filter_map_chain_sum: pass -> [missing] (J0)
iter::bench_filter_map_sum: pass -> [missing] (J0)
iter::bench_flat_map_sum: pass -> [missing] (J0)
iter::bench_peekable_chain_sum: pass -> [missing] (J0)
iter::bench_skip_chain_ref_sum: pass -> [missing] (J0)
iter::bench_zip_add: pass -> [missing] (J0)
iter::bench_zip_then_skip: pass -> [missing] (J0)
net::addr_parser::bench_parse_ipv4: pass -> [missing] (J0)
num::bench_i8_from_str: pass -> [missing] (J0)
num::bench_u8_from_str_radix_16: pass -> [missing] (J0)
num::dec2flt::bench_0: pass -> [missing] (J0)
num::flt2dec::strategy::dragon::bench_big_exact_3: pass -> [missing] (J0)
num::flt2dec::strategy::dragon::bench_small_exact_inf: pass -> [missing] (J0)
num::flt2dec::strategy::grisu::bench_big_shortest: pass -> [missing] (J0)
num::flt2dec::strategy::grisu::bench_small_exact_12: pass -> [missing] (J0)
num::int_log::u16_log_geometric: pass -> [missing] (J0)
num::int_pow::pow_m7: pass -> [missing] (J0)
pattern::find_char_long_nomatch: pass -> [missing] (J0)
pattern::split_1byte_str_dense: pass -> [missing] (J0)
slice::binary_search_l2: pass -> [missing] (J0)
str::char_count::emoji_medium::case01_filter_count_cont_bytes: pass -> [missing] (J0)
str::char_count::emoji_small::case03_manual_char_len: pass -> [missing] (J0)
str::char_count::en_large::case02_iter_increment: pass -> [missing] (J0)
str::char_count::ru_huge::case00_libcore: pass -> [missing] (J0)
str::char_count::ru_medium::case01_filter_count_cont_bytes: pass -> [missing] (J0)
str::char_count::ru_small::case03_manual_char_len: pass -> [missing] (J0)
str::char_count::zh_huge::case01_filter_count_cont_bytes: pass -> [missing] (J0)
str::char_count::zh_huge::case02_iter_increment: pass -> [missing] (J0)
str::debug::some_unicode: pass -> [missing] (J0)
str::iter::chars_advance_by_1000: pass -> [missing] (J0)
tuple::bench_tuple_comparison: pass -> [missing] (J0)
[debuginfo-lldb] tests/debuginfo/basic-types-globals-metadata.rs: ignore (lldb is not available) -> pass (J4)
[debuginfo-lldb] tests/debuginfo/box.rs: ignore (lldb is not available) -> pass (J4)
[debuginfo-lldb] tests/debuginfo/c-style-enum-in-composite.rs: ignore (lldb is not available) -> pass (J4)
[debuginfo-lldb] tests/debuginfo/closures.rs: ignore (lldb is not available) -> ignore (debugger is not cdb) (J4)
[debuginfo-lldb] tests/debuginfo/collapse-debuginfo-static-external.rs: ignore (lldb is not available) -> ignore (debugger is lldb) (J4)
[debuginfo-lldb] tests/debuginfo/empty-string.rs: ignore (lldb is not available) -> pass (J4)
[debuginfo-lldb] tests/debuginfo/function-arguments.rs: ignore (lldb is not available) -> pass (J4)
[debuginfo-lldb] tests/debuginfo/gdb-pretty-struct-and-enums.rs: ignore (lldb is not available) -> ignore (debugger is lldb) (J4)
[debuginfo-lldb] tests/debuginfo/unreachable-locals.rs: ignore (lldb is not available) -> pass (J4)
[ui] tests/ui/impl-trait/normalize-hir-typeck/field-access-on-type-ascription-134838.rs#old: [missing] -> pass (J5)
[ui] tests/ui/impl-trait/normalize-hir-typeck/in-closure-capture-ice-119786-2.rs#old: [missing] -> pass (J5)
[crashes] tests/crashes/135617.rs: pass -> [missing] (J7)
[crashes] tests/crashes/149015.rs: pass -> [missing] (J7)

(and 1580 additional test diffs)

Additionally, 53 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 33ffc9b4d83afef2445b585d379d7158cbbd2315 --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

test-i686-gnu-1: 1h 27m -> 2h 26m (+67.6%)
dist-x86_64-msvc: 2h 5m -> 3h 18m (+58.6%)
dist-loongarch64-linux: 1h 23m -> 2h 7m (+53.5%)
test-x86_64-gnu-llvm-22: 38m 20s -> 58m 24s (+52.3%)
dist-i686-msvc: 35m 49s -> 51m 48s (+44.6%)
dist-riscv64-linux-gnu: 1h 4m -> 1h 32m (+44.1%)
test-x86_64-mingw-2: 1h 47m -> 2h 34m (+43.8%)
test-x86_64-gnu-gcc-core-tests: 13m 41s -> 19m 13s (+40.4%)
test-various: 1h 41m -> 2h 21m (+39.1%)
test-i686-msvc: 2h 33m -> 1h 38m (-36.3%)

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 · 2026-10-08T00:59:49Z

Finished benchmarking commit (33ffc9b): comparison URL.

Overall result: ✅ 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)	0.2%	[0.2%, 0.2%]	1
Improvements ✅ (primary)	-0.1%	[-0.3%, -0.1%]	8
Improvements ✅ (secondary)	-0.3%	[-0.7%, -0.1%]	18
All ❌✅ (primary)	-0.1%	[-0.3%, -0.1%]	8

Max RSS (memory usage)

Results (primary -0.8%, secondary -2.0%)

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

	mean	range	count
Regressions ❌ (primary)	0.8%	[0.6%, 1.0%]	2
Regressions ❌ (secondary)	2.1%	[2.1%, 2.1%]	1
Improvements ✅ (primary)	-1.3%	[-2.2%, -0.8%]	7
Improvements ✅ (secondary)	-3.3%	[-6.3%, -1.7%]	3
All ❌✅ (primary)	-0.8%	[-2.2%, 1.0%]	9

Cycles

Results (primary -2.6%, secondary 6.5%)

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)	8.0%	[2.6%, 23.1%]	6
Improvements ✅ (primary)	-2.6%	[-3.5%, -1.9%]	5
Improvements ✅ (secondary)	-2.8%	[-2.8%, -2.8%]	1
All ❌✅ (primary)	-2.6%	[-3.5%, -1.9%]	5

Binary size

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

Bootstrap: 493.694s -> 490.731s (-0.60%)
Artifact size: 408.59 MiB -> 408.59 MiB (-0.00%)

rust-bors · 2026-10-08T01:23:23Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#163090	Run LLDB debuginfo tests on `x86_64-pc-windows-msvc` in CI	`b0a9fe0acce76ff7ce7ae010bbd24de4eaa967c4` (link)
#163806	even more `tests/crashes` migration for `-Znext-solver`	`169ad5547eab515e48d94cd179a4e114b32998cf` (link)
#163508	Document the `rustc_on_unimplemented` attribute.	`0033ef035800c023ec2e2225bc04d9cecca25a9c` (link)
#163794	Use `target_family = "wasm"` instead of `target_arch = "was…	`e5eb45199898f1c297d7ff47794d8b86470ed58b` (link)
#163863	use the type name instead of `Self` in constructor paths ag…	`8f3ba4bc4ce5d963793f62789eb1646f6db8b911` (link)
#163864	Remove CLAUDE.md	`b9226751245e740d4f5b28bcde9e271a150a3869` (link)
#163877	Add regression test for duplicated rustdoc search results b…	`6fc5104d9170986e808eed5ccab014b97210584d` (link)
#163916	Shrink `PartialRes` and its alignment	`1e63e2b649e118861a78324c2d36e966615e1c54` (link)
#149753	On name resolution error in parameter list, suggest possibl…	`726796137a00138cbecc3eff8c48ad1f965e7345` (link)
#152557	Oneshot `is_ready`	`e81d8bf5f34a0095142dbfca04e078d1caa6408f` (link)
#157273	Stabilize `optimize` attribute	`aab12dfcc7e422d4d9b0d5affc36539437c0d3d4` (link)
#162000	peel_transparent_wrappers only works on non-1ZST	`04881d10bd4d078a841ab5541cd7c6d6620eff34` (link)
#163343	`unit` and `[1 x unit]` layouts are incompatible on big-end…	`90495a8792bd6e2376b10dcfc85ab8133d57eb74` (link)
#163348	perf:cache FFI safety results in improper_ctypes lint	`e5ce1f73a1c77d9b5b422987e463a9a1c6bb8912` (link)
#163768	Move more `rustdoc-html` tests in the right location	`65cf92e86b4594c0ed002b3a4e77f98c9d785143` (link)
#163778	check is_indirect_first_projection when replacing in RefProp	`feb900bfc787a99640f2bfd658db3e3a0e021ebb` (link)
#163789	cg_llvm: Avoid `as_c_char_ptr` in several places	`039c207362cb5514336f6dd2db32c2d598846935` (link)
#163807	Add `has_reliable_f16b` for Arm	`3735716081df1dce2fab67e95b53618f2f39b521` (link)
#163809	Switch TLS implementation for wasi and bump SDK version to …	`8c1fed70e8b872f3c6441fe67ebacca42e8882fa` (link)
#163826	Update books	`e762465805a20554ee02c8a76e11b26099a37d35` (link)
#163849	ci: update to PowerShell 7.6.6	`e7b967ab024cdf34220e5ee6664ef11a8997f9b2` (link)
#163869	INSTALL.md: use UCRT64 instead of MINGW64 in MSYS2 section	`f49df6940e3b0140110d6dfecdc1618af5859f9e` (link)
#163870	Add if-installed:auto:spellcheck to pre-push script	`d709ed93c5ff39ddc26745a31551ad347c5c7009` (link)

parent commit: 1d81eb4ad9

In the case of a perf regression, run the following command with the SHAs of each PR you suspect might be the cause: @rust-timer triage $SHA $SHA $SHA..., or run @rust-timer triage all to benchmark all rollup members.

JonathanBrouwer · 2026-10-08T03:24:03Z

@rust-timer triage all

rust-timer · 2026-10-08T03:24:08Z

Running triage with 12 benchmarks

Triage only executes the benchmarks on rollup members, that were changed significantly on the rollup.
For this rollup, these benchmarks are:

coercions
ctfe-stress-5
externs
eza-0.21.2
html5ever-0.31.0
html5ever-0.31.0-new-solver
nalgebra-0.33.0
regression-31157
serde_derive-1.0.219
tt-muncher
wg-grammar
wg-grammar-new-solver

#163090 `b0a9fe0` Run LLDB debuginfo tests on `x86_64-pc-windows-msvc` in CI

This perf run didn't have relevant results for the `instruction count` metric.

Instruction count

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

Max RSS (memory usage)

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

Cycles

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

Binary size

Results (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
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.1%	[-0.1%, -0.1%]	3
All ❌✅ (primary)	-	-	0

#163806 `169ad55` even more `tests/crashes` migration for `-Znext-solver`

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
Improvements ✅ (primary)	-0.1%	[-0.1%, -0.1%]	2
Improvements ✅ (secondary)	-0.1%	[-0.1%, -0.1%]	6
All ❌✅ (primary)	-0.1%	[-0.1%, -0.1%]	2

Max RSS (memory usage)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.1%	[-2.1%, -2.0%]	2
All ❌✅ (primary)	-	-	0

Cycles

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

Binary size

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

#163508 `0033ef0` Document the `rustc_on_unimplemented` attribute.

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
Improvements ✅ (primary)	-0.1%	[-0.3%, -0.1%]	4
Improvements ✅ (secondary)	-0.2%	[-0.5%, -0.1%]	15
All ❌✅ (primary)	-0.1%	[-0.3%, -0.1%]	4

Max RSS (memory usage)

Results (secondary -2.2%)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.2%	[-2.2%, -2.2%]	1
All ❌✅ (primary)	-	-	0

Cycles

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

Binary size

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

#163794 `e5eb451` Use `target_family = "wasm"` instead of `target_arch = "wasm32"`

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
Improvements ✅ (primary)	-0.1%	[-0.1%, -0.1%]	2
Improvements ✅ (secondary)	-0.1%	[-0.1%, -0.1%]	6
All ❌✅ (primary)	-0.1%	[-0.1%, -0.1%]	2

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#163863 `8f3ba4b` use the type name instead of `Self` in constructor paths again

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
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary 0.2%)

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

	mean	range	count
Regressions ❌ (primary)	1.2%	[1.2%, 1.2%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.9%	[-0.9%, -0.9%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.2%	[-0.9%, 1.2%]	2

Cycles

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

Binary size

Results (primary -0.1%, 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
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.1%	[-0.1%, -0.1%]	2
Improvements ✅ (secondary)	-0.1%	[-0.1%, -0.0%]	12
All ❌✅ (primary)	-0.1%	[-0.1%, -0.1%]	2

#163864 `b922675` Remove CLAUDE.md

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
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

Max RSS (memory usage)

Results (secondary -2.0%)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.0%	[-2.0%, -2.0%]	1
All ❌✅ (primary)	-	-	0

Cycles

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

Binary size

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

#163877 `6fc5104` Add regression test for duplicated rustdoc search results between std and core

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
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#163916 `1e63e2b` Shrink `PartialRes` and its alignment

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
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.3%	[-0.3%, -0.3%]	1
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -1.4%, secondary -2.0%)

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)	-	-	0
Improvements ✅ (primary)	-1.4%	[-2.3%, -0.8%]	3
Improvements ✅ (secondary)	-2.0%	[-2.0%, -2.0%]	1
All ❌✅ (primary)	-1.4%	[-2.3%, -0.8%]	3

Cycles

Results (secondary 23.1%)

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)	23.1%	[22.6%, 23.6%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

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

#149753 `7267961` On name resolution error in parameter list, suggest possible `const` typo and avoid unnecessary second error

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
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

Max RSS (memory usage)

Results (secondary -2.2%)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.2%	[-2.2%, -2.2%]	1
All ❌✅ (primary)	-	-	0

Cycles

Results (secondary 14.1%)

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)	14.1%	[9.2%, 22.8%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

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

#152557 `e81d8bf` Oneshot `is_ready`

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)	0.4%	[0.3%, 0.4%]	2
Improvements ✅ (primary)	-0.1%	[-0.2%, -0.1%]	4
Improvements ✅ (secondary)	-0.2%	[-0.5%, -0.1%]	15
All ❌✅ (primary)	-0.1%	[-0.2%, -0.1%]	4

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#157273 `aab12df` Stabilize `optimize` attribute

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
Improvements ✅ (primary)	-0.1%	[-0.3%, -0.1%]	4
Improvements ✅ (secondary)	-0.2%	[-0.5%, -0.1%]	15
All ❌✅ (primary)	-0.1%	[-0.3%, -0.1%]	4

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#162000 `04881d1` peel_transparent_wrappers only works on non-1ZST

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
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

Max RSS (memory usage)

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

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.1%	[-2.1%, -2.1%]	1
All ❌✅ (primary)	-	-	0

Binary size

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

#163343 `90495a8` `unit` and `[1 x unit]` layouts are incompatible on big-endian targets

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
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#163348 `e5ce1f7` perf:cache FFI safety results in improper_ctypes lint

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
Improvements ✅ (primary)	-0.1%	[-0.3%, -0.1%]	4
Improvements ✅ (secondary)	-0.3%	[-0.7%, -0.1%]	21
All ❌✅ (primary)	-0.1%	[-0.3%, -0.1%]	4

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#163768 `65cf92e` Move more `rustdoc-html` tests in the right location

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
Improvements ✅ (primary)	-0.1%	[-0.1%, -0.1%]	2
Improvements ✅ (secondary)	-0.1%	[-0.1%, -0.1%]	6
All ❌✅ (primary)	-0.1%	[-0.1%, -0.1%]	2

Max RSS (memory usage)

Results (primary -0.8%, secondary -2.3%)

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)	-	-	0
Improvements ✅ (primary)	-0.8%	[-0.8%, -0.8%]	1
Improvements ✅ (secondary)	-2.3%	[-2.7%, -2.1%]	3
All ❌✅ (primary)	-0.8%	[-0.8%, -0.8%]	1

Cycles

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

Binary size

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

#163778 `feb900b` check is_indirect_first_projection when replacing in RefProp

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
Improvements ✅ (primary)	-0.2%	[-0.3%, -0.2%]	2
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	12
All ❌✅ (primary)	-0.2%	[-0.3%, -0.2%]	2

Max RSS (memory usage)

Results (primary -1.2%)

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)	-	-	0
Improvements ✅ (primary)	-1.2%	[-1.2%, -1.2%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.2%	[-1.2%, -1.2%]	1

Cycles

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

Binary size

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

#163789 `039c207` cg_llvm: Avoid `as_c_char_ptr` in several places

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
Improvements ✅ (primary)	-0.1%	[-0.3%, -0.1%]	4
Improvements ✅ (secondary)	-0.2%	[-0.5%, -0.1%]	15
All ❌✅ (primary)	-0.1%	[-0.3%, -0.1%]	4

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#163807 `3735716` Add `has_reliable_f16b` for Arm

This perf run didn't have relevant results for the `instruction count` metric.

Instruction count

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

Max RSS (memory usage)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.1%	[-2.1%, -2.1%]	1
All ❌✅ (primary)	-	-	0

Cycles

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

Binary size

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

#163809 `8c1fed7` Switch TLS implementation for wasi and bump SDK version to 34

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)	0.3%	[0.3%, 0.3%]	1
Improvements ✅ (primary)	-0.1%	[-0.2%, -0.1%]	4
Improvements ✅ (secondary)	-0.2%	[-0.5%, -0.1%]	15
All ❌✅ (primary)	-0.1%	[-0.2%, -0.1%]	4

Max RSS (memory usage)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.1%	[-2.1%, -2.1%]	1
All ❌✅ (primary)	-	-	0

Cycles

Results (secondary 24.7%)

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)	24.7%	[23.0%, 26.4%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

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

#163826 `e762465` Update books

This perf run didn't have relevant results for the `instruction count` metric.

Instruction count

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

Max RSS (memory usage)

Results (primary -0.8%, secondary -2.2%)

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)	-	-	0
Improvements ✅ (primary)	-0.8%	[-0.8%, -0.8%]	1
Improvements ✅ (secondary)	-2.2%	[-2.2%, -2.2%]	2
All ❌✅ (primary)	-0.8%	[-0.8%, -0.8%]	1

Cycles

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

Binary size

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

#163849 `e7b967a` ci: update to PowerShell 7.6.6

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
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

Max RSS (memory usage)

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

Cycles

Results (primary 1.4%, secondary 4.3%)

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

	mean	range	count
Regressions ❌ (primary)	1.4%	[1.4%, 1.4%]	1
Regressions ❌ (secondary)	4.3%	[4.3%, 4.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.4%	[1.4%, 1.4%]	1

Binary size

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

#163869 `f49df69` INSTALL.md: use UCRT64 instead of MINGW64 in MSYS2 section

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
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-0.3%	[-0.5%, -0.1%]	11
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

Max RSS (memory usage)

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

Cycles

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

Binary size

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

#163870 `d709ed9` Add if-installed:auto:spellcheck to pre-push script

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
Improvements ✅ (primary)	-0.1%	[-0.3%, -0.1%]	4
Improvements ✅ (secondary)	-0.3%	[-0.6%, -0.1%]	16
All ❌✅ (primary)	-0.1%	[-0.3%, -0.1%]	4

Max RSS (memory usage)

Results (primary -0.9%, secondary -2.2%)

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)	-	-	0
Improvements ✅ (primary)	-0.9%	[-0.9%, -0.9%]	1
Improvements ✅ (secondary)	-2.2%	[-2.2%, -2.2%]	1
All ❌✅ (primary)	-0.9%	[-0.9%, -0.9%]	1

Cycles

Results (secondary -2.2%)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.2%	[-2.2%, -2.2%]	1
All ❌✅ (primary)	-	-	0

Binary size

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

veluca93 and others added 30 commits September 15, 2026 00:29

stabilize optimize attribute (size, speed, and none)

5e2ccb2

This commit stabilizes the `#[optimize]` attribute, which allows for more fine-grained control of optimization levels.

peel_transparent_wrappers only works on non-1ZST

3b3ba8b

leave a comment for some sve hacks

6e8947a

cache results in improper_ctypes lint

5e9dca9

fix build errors

fa3bfde

On name resolution error in parameter list, suggest possible const …

e733825

…typo

Do not emit E0747 if a resolve error was already emitted

80f91df

review comment: move change of path source to smart_resolve_report_er…

8652467

…rors

check is_indirect_first_projection when replacing in RefProp

7a1ec8e

Avoid as_c_char_ptr in debuginfo

66c7ec6

Avoid as_c_char_ptr in declare.rs

891c24d

Avoid as_c_char_ptr in write.rs

ae54544

Use target_family = "wasm" instead of target_arch = "wasm32"

0f7320c

This slightly improves support for the WASM64 architecture.

Add has_reliable_f16b for Arm

54bdb68

Update books

9837aeb

oneshot is_ready

e779bd7

Signed-off-by: Connor Tsui <connor.tsui20@gmail.com>

factor out as check_ffi_type method

54a6d2e

Move more tests around in rustdoc-html

9de9ceb

Replace some !has checks in rustdoc-html test

78aa1c8

ci: update to PowerShell 7.6.6

60afb41

add required_python_version to jobs

f57e16d

run LLDB debuginfo tests on Windows CI

9109556

use the type name instead of Self in constructor paths again

e1a95eb

Remove CLAUDE.md

aec15ee

Claude Code loads AGENTS.md since 2.1.277, released September 18. See https://code.claude.com/docs/en/changelog#2-1-277.

add if-installed:auto:spellcheck to pre-push script

2553cca

Add regression test for duplicated rustdoc search results between std…

b71426d

… and core

Adjust the adjustment to wasi TLS to no longer adjust

87ec21a

continue next-solver crashes triage

3bc8827

cont tests/crashes migration

5c5254e

remove duplicate test

ee6d48c

github-actions Bot mentioned this pull request Oct 9, 2026

Toolchain upgrade to nightly-2026-10-09 flux-rs/flux#1811

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Rollup of 23 pull requests - #163957

Rollup of 23 pull requests#163957
rust-bors[bot] merged 81 commits into
rust-lang:mainfrom
JonathanBrouwer:rollup-7XLGaMJ

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rust-timer commented Oct 8, 2026 •

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JonathanBrouwer commented Oct 7, 2026

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rust-timer commented Oct 8, 2026

Overall result: ✅ improvements - no action needed

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#163090 b0a9fe0 Run LLDB debuginfo tests on x86_64-pc-windows-msvc in CI

#163806 169ad55 even more tests/crashes migration for -Znext-solver

#163508 0033ef0 Document the rustc_on_unimplemented attribute.

#163794 e5eb451 Use target_family = "wasm" instead of target_arch = "wasm32"

#163863 8f3ba4b use the type name instead of Self in constructor paths again

#163864 b922675 Remove CLAUDE.md

#163877 6fc5104 Add regression test for duplicated rustdoc search results between std and core

#163916 1e63e2b Shrink PartialRes and its alignment

#149753 7267961 On name resolution error in parameter list, suggest possible const typo and avoid unnecessary second error

#152557 e81d8bf Oneshot is_ready

#157273 aab12df Stabilize optimize attribute

#162000 04881d1 peel_transparent_wrappers only works on non-1ZST

#163343 90495a8 unit and [1 x unit] layouts are incompatible on big-endian targets

#163348 e5ce1f7 perf:cache FFI safety results in improper_ctypes lint

#163768 65cf92e Move more rustdoc-html tests in the right location

#163778 feb900b check is_indirect_first_projection when replacing in RefProp

#163789 039c207 cg_llvm: Avoid as_c_char_ptr in several places

#163807 3735716 Add has_reliable_f16b for Arm

#163809 8c1fed7 Switch TLS implementation for wasi and bump SDK version to 34

#163826 e762465 Update books

#163849 e7b967a ci: update to PowerShell 7.6.6

#163869 f49df69 INSTALL.md: use UCRT64 instead of MINGW64 in MSYS2 section

#163870 d709ed9 Add if-installed:auto:spellcheck to pre-push script

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rust-timer commented Oct 8, 2026 •

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#163090 `b0a9fe0` Run LLDB debuginfo tests on `x86_64-pc-windows-msvc` in CI

#163806 `169ad55` even more `tests/crashes` migration for `-Znext-solver`

#163508 `0033ef0` Document the `rustc_on_unimplemented` attribute.

#163794 `e5eb451` Use `target_family = "wasm"` instead of `target_arch = "wasm32"`

#163863 `8f3ba4b` use the type name instead of `Self` in constructor paths again

#163864 `b922675` Remove CLAUDE.md

#163877 `6fc5104` Add regression test for duplicated rustdoc search results between std and core

#163916 `1e63e2b` Shrink `PartialRes` and its alignment

#149753 `7267961` On name resolution error in parameter list, suggest possible `const` typo and avoid unnecessary second error

#152557 `e81d8bf` Oneshot `is_ready`

#157273 `aab12df` Stabilize `optimize` attribute

#162000 `04881d1` peel_transparent_wrappers only works on non-1ZST

#163343 `90495a8` `unit` and `[1 x unit]` layouts are incompatible on big-endian targets

#163348 `e5ce1f7` perf:cache FFI safety results in improper_ctypes lint

#163768 `65cf92e` Move more `rustdoc-html` tests in the right location

#163778 `feb900b` check is_indirect_first_projection when replacing in RefProp

#163789 `039c207` cg_llvm: Avoid `as_c_char_ptr` in several places

#163807 `3735716` Add `has_reliable_f16b` for Arm

#163809 `8c1fed7` Switch TLS implementation for wasi and bump SDK version to 34

#163826 `e762465` Update books

#163849 `e7b967a` ci: update to PowerShell 7.6.6

#163869 `f49df69` INSTALL.md: use UCRT64 instead of MINGW64 in MSYS2 section

#163870 `d709ed9` Add if-installed:auto:spellcheck to pre-push script