optimization: don't look for diagnostic/canonical items without rustc_attrs enabled by mejrs · Pull Request #159732 · rust-lang/rust

mejrs · 2026-07-22T17:11:08Z

No description provided.

…_attrs enabled

mejrs · 2026-07-22T17:11:23Z

optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

rust-bors · 2026-07-22T19:20:04Z

☀️ Try build successful (CI)
Build commit: a7e10cb (a7e10cb790e92286329e5cdecbeacfd62d6d09f7)
Base parent: c188565 (c188565812a9b414ddf02f3c7d89e84f1ba53f7d)

rust-timer · 2026-07-22T20:09:53Z

Finished benchmarking commit (a7e10cb): comparison URL.

Overall result: ✅ improvements - no action needed

Benchmarking means the PR may be perf-sensitive. Consider adding rollup=never if this change is not fit for rolling up.

@rustbot label: -S-waiting-on-perf -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
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.2%	[-0.2%, -0.2%]	4
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (secondary 2.8%)

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)	2.8%	[2.2%, 3.5%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
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.

Bootstrap: 489.502s -> 488.835s (-0.14%)
Artifact size: 387.76 MiB -> 387.83 MiB (0.02%)

mejrs · 2026-07-22T20:13:36Z

Looks like this somewhat undid the (small) regression in #159344 (comment) cc @Urgau

r? @nnethercote

Do you think this is worthwhile?

nnethercote

Looks like this somewhat undid the (small) regression in #159344 (comment) cc @Urgau

That PR slightly regressed large-workspace and externs. This PR slightly improves unused-warnings, which is a stress test with a bazillion warnings that is not representative of real-world code. Having said that, this change is trivial, so it's not like we're paying any cost. I'll let you decide if you want to merge it.

View changes since this review

nnethercote · 2026-07-23T03:38:45Z

@bors delegate=mejrs

rust-bors · 2026-07-23T03:38:48Z

✌️ @mejrs, you can now approve this pull request!

If @nnethercote told you to "r=me" after making some further change, then please make that change and post @bors r=nnethercote.

View changes since this delegation.

mejrs · 2026-07-24T06:51:51Z

let's do it

@bors r=nnethercote

rust-bors · 2026-07-24T06:51:54Z

📌 Commit aabf824 has been approved by nnethercote

It is now in the queue for this repository.

optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

rust-log-analyzer · 2026-07-24T10:46:28Z

A job failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

#29 loading layer 8a50b5f1ebd4 625.46MB / 625.46MB 33.3s done
#29 loading layer d4d73977ead7 351B / 351B 22.6s done
#29 loading layer ae4e189d5071 624.93MB / 624.93MB 22.6s done
#29 loading layer 1ce6387464db 282B / 282B 12.3s done
#29 ERROR: write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device

#27 exporting to docker image format
#27 sending tarball 76.2s done
#27 ERROR: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
------
 > exporting to docker image format:
------
------
 > importing to docker:
------
ERROR: failed to build: failed to solve: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
Command failed. Attempt 2/5:
#0 building with "focused_yalow" instance using docker-container driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 7.17kB done
---
#27 loading layer 8a50b5f1ebd4 625.46MB / 625.46MB 32.5s done
#27 loading layer d4d73977ead7 351B / 351B 22.0s done
#27 loading layer ae4e189d5071 624.93MB / 624.93MB 21.9s done
#27 loading layer 1ce6387464db 282B / 282B 11.9s done
#27 ERROR: write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device

#26 exporting to docker image format
#26 sending tarball 75.2s done
#26 ERROR: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
------
 > exporting to docker image format:
------
------
 > importing to docker:
------
ERROR: failed to build: failed to solve: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
Command failed. Attempt 3/5:
#0 building with "focused_yalow" instance using docker-container driver

#1 [internal] load build definition from Dockerfile
#1 DONE 0.0s
---
#27 loading layer 8a50b5f1ebd4 625.46MB / 625.46MB 32.9s done
#27 loading layer d4d73977ead7 351B / 351B 22.3s done
#27 loading layer ae4e189d5071 624.93MB / 624.93MB 22.3s done
#27 loading layer 1ce6387464db 282B / 282B 12.2s done
#27 ERROR: write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device

#26 exporting to docker image format
#26 sending tarball 75.0s done
#26 ERROR: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
------
 > exporting to docker image format:
------
------
 > importing to docker:
------
ERROR: failed to build: failed to solve: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
Command failed. Attempt 4/5:
#0 building with "focused_yalow" instance using docker-container driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 7.17kB done
---
#27 loading layer 8a50b5f1ebd4 625.46MB / 625.46MB 32.8s done
#27 loading layer d4d73977ead7 351B / 351B 22.2s done
#27 loading layer ae4e189d5071 624.93MB / 624.93MB 22.2s done
#27 loading layer 1ce6387464db 282B / 282B 12.2s done
#27 ERROR: write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device

#26 exporting to docker image format
#26 sending tarball 76.1s done
#26 ERROR: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
------
 > exporting to docker image format:
------
------
 > importing to docker:
------
ERROR: failed to build: failed to solve: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
Command failed. Attempt 5/5:
#0 building with "focused_yalow" instance using docker-container driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 7.17kB done
---
#28 loading layer 8a50b5f1ebd4 625.46MB / 625.46MB 32.6s done
#28 loading layer d4d73977ead7 351B / 351B 22.1s done
#28 loading layer ae4e189d5071 624.93MB / 624.93MB 22.1s done
#28 loading layer 1ce6387464db 282B / 282B 12.1s done
#28 ERROR: write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device

#27 exporting to docker image format
#27 sending tarball 77.0s done
#27 ERROR: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
------
 > exporting to docker image format:
------
------
 > importing to docker:
------
ERROR: failed to build: failed to solve: rpc error: code = Unknown desc = write /build/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libllvmlibc-mt.a: no space left on device
The command has failed after 5 attempts.
##[error]Process completed with exit code 1.
##[group]Run echo "disk usage:"
echo "disk usage:"
df -h

…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

Rollup of 17 pull requests Successful merges: - #158168 (Added implementation on `set_permissions_nofollow` for all primary platforms) - #138618 (Support using const pointers in asm `const` operand) - #157962 (Function item should not be used as const arg) - #158404 (trait_solver: normalize next-gen region constraints) - #158709 (rustdoc: warn on improperly interleaved HTML/MD) - #159720 (document #[global_allocator] constraints) - #159732 (optimization: don't look for diagnostic/canonical items without rustc_attrs enabled) - #159740 (reuse regular exported_non_generic_symbols logic in Miri) - #159780 (check `extern "custom"` function pointers) - #159786 (rustdoc-js: ignore editor temp files in test folder discovery) - #159819 (std::sync::poison: disable auto_cfg on PoisonError::new) - #155388 (stepping into where-clauses during normalization may be productive) - #155914 (when bailing on ambiguity, don't force other results to ambig) - #159411 ([rustdoc] Correctly handle output options with --show-coverage) - #159439 (Fix(lib/fs/win): Fall back on Win32 delete for `Dir::remove_file`) - #159809 (Avoid `#[target_features]`) - #159826 (Remove redundant `#[rustc_paren_sugar]` feature gate)

…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

Rollup of 16 pull requests Successful merges: - #138618 (Support using const pointers in asm `const` operand) - #157962 (Function item should not be used as const arg) - #158404 (trait_solver: normalize next-gen region constraints) - #158709 (rustdoc: warn on improperly interleaved HTML/MD) - #159720 (document #[global_allocator] constraints) - #159732 (optimization: don't look for diagnostic/canonical items without rustc_attrs enabled) - #159740 (reuse regular exported_non_generic_symbols logic in Miri) - #159780 (check `extern "custom"` function pointers) - #159786 (rustdoc-js: ignore editor temp files in test folder discovery) - #159819 (std::sync::poison: disable auto_cfg on PoisonError::new) - #155388 (stepping into where-clauses during normalization may be productive) - #155914 (when bailing on ambiguity, don't force other results to ambig) - #159411 ([rustdoc] Correctly handle output options with --show-coverage) - #159439 (Fix(lib/fs/win): Fall back on Win32 delete for `Dir::remove_file`) - #159809 (Avoid `#[target_features]`) - #159826 (Remove redundant `#[rustc_paren_sugar]` feature gate)

…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

Rollup of 20 pull requests Successful merges: - #138618 (Support using const pointers in asm `const` operand) - #157962 (Lower paths to functions in const args as ConstKind::Error) - #158404 (trait_solver: normalize next-gen region constraints) - #158709 (rustdoc: warn on improperly interleaved HTML/MD) - #159720 (document #[global_allocator] constraints) - #159732 (optimization: don't look for diagnostic/canonical items without rustc_attrs enabled) - #159738 (implement `CovariantUnsafeCell`) - #159740 (reuse regular exported_non_generic_symbols logic in Miri) - #159780 (check `extern "custom"` function pointers) - #159786 (rustdoc-js: ignore editor temp files in test folder discovery) - #159819 (std::sync::poison: disable auto_cfg on PoisonError::new) - #155388 (stepping into where-clauses during normalization may be productive) - #155914 (when bailing on ambiguity, don't force other results to ambig) - #159439 (Fix(lib/fs/win): Fall back on Win32 delete for `Dir::remove_file`) - #159676 (Update wasm-component-ld to 0.5.27) - #159730 (allow accessing the contents of UnsafeCell without going through get) - #159809 (Avoid `#[target_features]`) - #159826 (Remove redundant `#[rustc_paren_sugar]` feature gate) - #159853 (Updated expect messages for `CString` struct and method documentation) - #159877 (Revert "Export `derive` at `core::derive` and `std::derive`")

…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

Rollup of 23 pull requests Successful merges: - #159720 (document #[global_allocator] constraints) - #159732 (optimization: don't look for diagnostic/canonical items without rustc_attrs enabled) - #159738 (implement `CovariantUnsafeCell`) - #159740 (reuse regular exported_non_generic_symbols logic in Miri) - #159780 (check `extern "custom"` function pointers) - #159786 (rustdoc-js: ignore editor temp files in test folder discovery) - #159819 (std::sync::poison: disable auto_cfg on PoisonError::new) - #155388 (stepping into where-clauses during normalization may be productive) - #155914 (when bailing on ambiguity, don't force other results to ambig) - #159204 (Add support to caller_location to rustc_public) - #159411 ([rustdoc] Correctly handle output options with --show-coverage) - #159439 (Fix(lib/fs/win): Fall back on Win32 delete for `Dir::remove_file`) - #159676 (Update wasm-component-ld to 0.5.27) - #159730 (allow accessing the contents of UnsafeCell without going through get) - #159809 (Avoid `#[target_features]`) - #159810 (Add tuple never coercion collection regression test) - #159826 (Remove redundant `#[rustc_paren_sugar]` feature gate) - #159853 (Updated expect messages for `CString` struct and method documentation) - #159877 (Revert "Export `derive` at `core::derive` and `std::derive`") - #159878 (bootstrap: Remove obsolete option `build.compiletest-use-stage0-libtest`) - #159882 (Update expect messages in library/alloc/boxed.rs and library/alloc/string.rs to follow the style guide) - #159891 (Split multiline derives into std/rustc macros) - #159895 (rustc-dev-guide subtree update)

…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

Rollup of 23 pull requests Successful merges: - #159673 (bootstrap: forward -fdebug-prefix-map when using cc) - #159720 (document #[global_allocator] constraints) - #159732 (optimization: don't look for diagnostic/canonical items without rustc_attrs enabled) - #159738 (implement `CovariantUnsafeCell`) - #159740 (reuse regular exported_non_generic_symbols logic in Miri) - #159780 (check `extern "custom"` function pointers) - #159786 (rustdoc-js: ignore editor temp files in test folder discovery) - #159819 (std::sync::poison: disable auto_cfg on PoisonError::new) - #155388 (stepping into where-clauses during normalization may be productive) - #155914 (when bailing on ambiguity, don't force other results to ambig) - #159204 (Add support to caller_location to rustc_public) - #159411 ([rustdoc] Correctly handle output options with --show-coverage) - #159439 (Fix(lib/fs/win): Fall back on Win32 delete for `Dir::remove_file`) - #159676 (Update wasm-component-ld to 0.5.27) - #159730 (allow accessing the contents of UnsafeCell without going through get) - #159809 (Avoid `#[target_features]`) - #159810 (Add tuple never coercion collection regression test) - #159826 (Remove redundant `#[rustc_paren_sugar]` feature gate) - #159853 (Updated expect messages for `CString` struct and method documentation) - #159878 (bootstrap: Remove obsolete option `build.compiletest-use-stage0-libtest`) - #159882 (Update expect messages in library/alloc/boxed.rs and library/alloc/string.rs to follow the style guide) - #159891 (Split multiline derives into std/rustc macros) - #159895 (rustc-dev-guide subtree update)

…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

…uwer Rollup of 25 pull requests Successful merges: - #138618 (Support using const pointers in asm `const` operand) - #157962 (Lower paths to functions in const args as ConstKind::Error) - #158404 (trait_solver: normalize next-gen region constraints) - #158709 (rustdoc: warn on improperly interleaved HTML/MD) - #159174 (Fix implicit_provenance_casts warnings on Xous) - #159179 (enable `unreachable_cfg_select_predicates` lint as part of `unused` lint group) - #159518 (iter: extend step_by specialization to cover StepBy<RangeIter<{integer}>>) - #159673 (bootstrap: forward -fdebug-prefix-map when using cc) - #159700 (Split non-local `semicolon_in_expressions_from_macros` into a separate lint) - #159720 (document #[global_allocator] constraints) - #159732 (optimization: don't look for diagnostic/canonical items without rustc_attrs enabled) - #159738 (implement `CovariantUnsafeCell`) - #159740 (reuse regular exported_non_generic_symbols logic in Miri) - #159780 (check `extern "custom"` function pointers) - #159785 (Share _Unwind_Exception definition between native and wasm) - #159786 (rustdoc-js: ignore editor temp files in test folder discovery) - #159819 (std::sync::poison: disable auto_cfg on PoisonError::new) - #155388 (stepping into where-clauses during normalization may be productive) - #155914 (when bailing on ambiguity, don't force other results to ambig) - #159204 (Add support to caller_location to rustc_public) - #159439 (Fix(lib/fs/win): Fall back on Win32 delete for `Dir::remove_file`) - #159676 (Update wasm-component-ld to 0.5.27) - #159695 (proc_macro: Fix cfg_attr inner attrs in file modules) - #159730 (allow accessing the contents of UnsafeCell without going through get) - #159809 (Avoid `#[target_features]`)

…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

…uwer Rollup of 25 pull requests Successful merges: - #159825 (codegen: handle OperandValue::Uninit in codegen_return_terminator) - #138618 (Support using const pointers in asm `const` operand) - #157962 (Lower paths to functions in const args as ConstKind::Error) - #158404 (trait_solver: normalize next-gen region constraints) - #158709 (rustdoc: warn on improperly interleaved HTML/MD) - #159174 (Fix implicit_provenance_casts warnings on Xous) - #159179 (enable `unreachable_cfg_select_predicates` lint as part of `unused` lint group) - #159518 (iter: extend step_by specialization to cover StepBy<RangeIter<{integer}>>) - #159673 (bootstrap: forward -fdebug-prefix-map when using cc) - #159700 (Split non-local `semicolon_in_expressions_from_macros` into a separate lint) - #159720 (document #[global_allocator] constraints) - #159732 (optimization: don't look for diagnostic/canonical items without rustc_attrs enabled) - #159738 (implement `CovariantUnsafeCell`) - #159740 (reuse regular exported_non_generic_symbols logic in Miri) - #159780 (check `extern "custom"` function pointers) - #159786 (rustdoc-js: ignore editor temp files in test folder discovery) - #159819 (std::sync::poison: disable auto_cfg on PoisonError::new) - #155388 (stepping into where-clauses during normalization may be productive) - #155914 (when bailing on ambiguity, don't force other results to ambig) - #159204 (Add support to caller_location to rustc_public) - #159439 (Fix(lib/fs/win): Fall back on Win32 delete for `Dir::remove_file`) - #159676 (Update wasm-component-ld to 0.5.27) - #159695 (proc_macro: Fix cfg_attr inner attrs in file modules) - #159730 (allow accessing the contents of UnsafeCell without going through get) - #159809 (Avoid `#[target_features]`)

optimization: don't look for diagnostic/canonical items without rustc…

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Auto merge of #159732 - mejrs:attribute_crawler, r=<try>

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optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jul 22, 2026

rustbot assigned nnethercote Jul 22, 2026

mejrs marked this pull request as ready for review July 22, 2026 20:13

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Auto merge of #159732 - mejrs:attribute_crawler, r=nnethercote

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optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup of 18 pull requests #159871

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup of 17 pull requests #159872

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup of 16 pull requests #159876

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup of 19 pull requests #159879

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup of 20 pull requests #159888

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup of 23 pull requests #159903

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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…cote optimization: don't look for diagnostic/canonical items without rustc_attrs enabled

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Rollup of 23 pull requests #159905

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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Rollup of 25 pull requests #159920

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Rollup merge of rust-lang#159732 - mejrs:attribute_crawler, r=nnether…

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Rollup of 25 pull requests #159926

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mejrs commented Jul 22, 2026

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rust-timer commented Jul 22, 2026

Overall result: ✅ improvements - no action needed

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nnethercote commented Jul 23, 2026

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