Update cargo submodule

[weihanglo]

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26 commits in e8cb624d5701824f46a2ec5873cfd59ee3d2f66c..b2e9d5f9db3fb1c454ab84f10c16508984a266e2
2026-08-22 00:23:45 +0000 to 2026-09-02 14:49:16 +0000

• fix(parser): Resolve theoretical use-after-free (fix(parser): Resolve theoretical use-after-free cargo#17428)
• fix(trim-paths)!: remove default scope from release profile (fix(trim-paths)!: remove default scope from release profile cargo#17424)
• fix(git): Use git's 429 retry, when available (fix(git): Use git's 429 retry, when available cargo#17422)
• Avoid passing search path (-L) args when they are passed as --extern (Avoid passing search path (-L) args when they are passed as --extern cargo#17410)
• chore(deps): update crate-ci/typos action to v1.50.0 (chore(deps): update crate-ci/typos action to v1.50.0 cargo#17417)
• test: Move -Z onto its own line (test: Move -Z onto its own line cargo#17416)
• chore(triagebot): enable @rustbot merge/delegate (chore(triagebot): enable @rustbot merge/delegate cargo#17415)
• Micro-optimize two package dir functions (Micro-optimize two package dir functions cargo#17413)
• perf: Do not build SBOM if user has not set build.sbom (perf: Do not build SBOM if user has not set build.sbom cargo#17412)
• feat(manifest)!: implement feature-metadata RFC3416 (feat(manifest)!: implement feature-metadata RFC3416 cargo#15056)
• Cargo profiling improvements (Cargo profiling improvements cargo#17411)
• test(git): Remove gix override run in CI and the mode in code (test(git): Remove gix override run in CI and the mode in code cargo#17405)
• perf(git): Reduce extra work when using git-cli (perf(git): Reduce extra work when using git-cli cargo#17406)
• feat(resolver): Stabilize min-publish-age (feat(resolver): Stabilize min-publish-age cargo#17335)
• fix(git): Remove ref status update when showing progress (fix(git): Remove ref status update when showing progress  cargo#17400)
• revert: refactor: move sysroot lookup to GlobalContext (revert: refactor: move sysroot lookup to GlobalContext cargo#17401)
• fix(run): Printing a new line to avoid overwriting error code after \r (fix(run): Printing a new line to avoid overwriting error code after \r cargo#17373)
• fix(trim-paths): custom workspace-relative member paths remap (fix(trim-paths): custom workspace-relative member paths remap cargo#17366)
• fix(home): rustdoc lint (fix(home): rustdoc lint cargo#17394)
• feat(diag): Stabilize cargo-lints (feat(diag): Stabilize cargo-lints  cargo#17298)
• chore(deps): Update partial_ref to v0.3.4 (chore(deps): Update partial_ref to v0.3.4 cargo#17392)
• refactor: remove ad-hoc subslice_range (refactor: remove ad-hoc subslice_range cargo#17390)
• docs(changelog): move build-dir new layout to Changed (docs(changelog): move build-dir new layout to Changed cargo#17387)
• chore(deps): update msrv (1 version) to v1.98 (chore(deps): update msrv (1 version) to v1.98 cargo#17386)
• docs: Use mdbook admonitions (docs: Use mdbook admonitions cargo#17384)
• chore(ci): exclude resolver-tests from intra doc link checks (chore(ci): exclude resolver-tests from intra doc link checks cargo#17385)

[rustbot]

⚠️ Warning ⚠️

• Some commits in this PR modify submodules.

  If this was not intentional, see I changed a submodule on accident in the rustc dev guide.

[weihanglo]

@bors r+ rollup=never p=1

[rust-bors]

📌 Commit 96c36b7 has been approved by weihanglo

It is now in the queue for this repository.

[rust-bors]

💔 Test for 4b7a1b9 failed: CI. Failed job:

• auto - dist-x86_64-linux (web logs, enhanced plaintext logs)

[weihanglo]

Fist blood!

warning: explicit `package.readme` can be inferred
 --> src/tools/clippy/rustc_tools_util/Cargo.toml:6:1
  |
6 | readme = "README.md"
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: `cargo::manual_readme` is set to `warn` by default
help: consider removing `package.readme`
warning: `rustc_tools_util` (manifest) generated 1 warning
warning: explicit `package.readme` can be inferred
 --> src/tools/rustfmt/Cargo.toml:6:1
  |
6 | readme = "README.md"
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: `cargo::manual_readme` is set to `warn` by default
help: consider removing `package.readme`
warning: `rustfmt-nightly` (manifest) generated 1 warning
warning: binary `rustdoc_tool_binary` should have a kebab-case name
   |
 1 | /checkout/obj/build/x86_64-unknown-linux-gnu/bootstrap-tools/.../rustdoc_tool_binary
   |                                                                  ^^^^^^^^^^^^^^^^^^^
   |
   = note: `cargo::non_kebab_case_bins` is set to `warn` by default
help: to change the binary name to `rustdoc-tool-binary`, convert `bin.name`
  --> src/tools/rustdoc/Cargo.toml:10:8
   |
10 - name = "rustdoc_tool_binary"
10 + name = "rustdoc-tool-binary"
   |
warning: `rustdoc-tool` (manifest) generated 1 warning
warning: explicit `package.readme` can be inferred
 --> src/tools/clippy/Cargo.toml:6:1
  |
6 | readme = "README.md"
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: `cargo::manual_readme` is set to `warn` by default
help: consider removing `package.readme`
warning: `clippy` (manifest) generated 1 warning
warning: binary `clippy_dev` should have a kebab-case name
   |
 1 | /checkout/obj/build/x86_64-unknown-linux-gnu/bootstrap-tools/.../clippy_dev
   |                                                                  ^^^^^^^^^^
   |
   = note: `cargo::non_kebab_case_bins` is set to `warn` by default
help: to change the binary name to `clippy-dev`, convert `package.name`
  --> src/tools/clippy/clippy_dev/Cargo.toml:2:8
   |
 2 - name = "clippy_dev"
 2 + name = "clippy-dev"
   |
help: to change the binary name to `clippy-dev`, specify `bin.name`
  --> src/tools/clippy/clippy_dev/Cargo.toml:18:22
   |
18 ~ rustc_private = true
19 + [[bin]]
20 + name = "clippy-dev"
21 + path = "src/main.rs"
   |
warning: `clippy_dev` (manifest) generated 1 warning
warning: explicit `package.readme` can be inferred
 --> src/tools/clippy/clippy_utils/Cargo.toml:7:1
  |
7 | readme = "README.md"
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: `cargo::manual_readme` is set to `warn` by default
help: consider removing `package.readme`
warning: `clippy_utils` (manifest) generated 1 warning
warning: explicit `package.readme` can be inferred
  --> compiler/rustc_thread_pool/Cargo.toml:11:1
   |
11 | readme = "README.md"
   | ^^^^^^^^^^^^^^^^^^^^
   |
   = note: `cargo::manual_readme` is set to `warn` by default
help: consider removing `package.readme`
warning: `rustc_thread_pool` (manifest) generated 1 warning
warning: explicit `package.readme` can be inferred
 --> src/tools/clippy/clippy_lints/Cargo.toml:6:1
  |
6 | readme = "README.md"
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: `cargo::manual_readme` is set to `warn` by default
help: consider removing `package.readme`
warning: `clippy_lints` (manifest) generated 1 warning
   Compiling proc-macro2 v1.0.106
   Compiling unicode-ident v1.0.24
   Compiling quote v1.0.45
   Compiling libc v0.2.189
   Compiling cfg-if v1.0.4
   Compiling memchr v2.8.0
   Compiling once_cell v1.21.3
   Compiling crossbeam-utils v0.8.21
   Compiling serde_core v1.0.228
   Compiling crossbeam-epoch v0.9.20
   Compiling getrandom v0.3.3
   Compiling anstyle v1.0.13
   Compiling regex-syntax v0.8.8
   Compiling rustix v1.1.2
   Compiling parking_lot_core v0.9.12
   Compiling serde v1.0.228
   Compiling bitflags v2.10.0
   Compiling scopeguard v1.2.0
   Compiling serde_json v1.0.145
   Compiling pin-project-lite v0.2.16
   Compiling thiserror v1.0.69
   Compiling linux-raw-sys v0.11.0
   Compiling rayon-core v1.13.0
   Compiling smallvec v1.15.1
   Compiling utf8parse v0.2.2
   Compiling utf8-width v0.1.7
   Compiling lazy_static v1.5.0
   Compiling fastrand v2.3.0
   Compiling heck v0.5.0
   Compiling clap_lex v1.1.0
   Compiling camino v1.2.1
   Compiling itoa v1.0.15
   Compiling ryu v1.0.20
   Compiling thread_local v1.1.9
   Compiling lock_api v0.4.14
   Compiling html-escape v0.2.13
   Compiling anstyle-lossy v1.1.4
   Compiling sharded-slab v0.1.7
   Compiling tracing-core v0.1.36
   Compiling anstyle-parse v0.2.7
   Compiling clap_builder v4.6.0
   Compiling unicode-width v0.2.2
   Compiling hashbrown v0.17.1
   Compiling equivalent v1.0.2
   Compiling either v1.15.0
   Compiling same-file v1.0.6
   Compiling diff v0.1.13
   Compiling nu-ansi-term v0.50.3
   Compiling home v0.5.12
   Compiling glob v0.3.3
   Compiling colored v3.1.1
   Compiling walkdir v2.5.0
   Compiling miropt-test-tools v0.1.0 (/checkout/src/tools/miropt-test-tools)
   Compiling build_helper v0.1.0 (/checkout/src/build_helper)
   Compiling unified-diff v0.2.1
   Compiling aho-corasick v1.1.4
   Compiling syn v2.0.117
   Compiling anstyle-svg v0.1.11
   Compiling crossbeam-deque v0.8.6
   Compiling indexmap v2.14.0
   Compiling parking_lot v0.12.5
   Compiling rayon v1.11.0
   Compiling regex-automata v0.4.13
   Compiling tempfile v3.23.0
   Compiling shim_utils v0.0.0 (/checkout/src/shim_utils)
   Compiling semver v1.0.27
   Compiling tracing-attributes v0.1.31
   Compiling thiserror-impl v1.0.69
   Compiling serde_derive v1.0.228
   Compiling clap_derive v4.6.1
   Compiling tracing v0.1.44
   Compiling clap v4.6.1
   Compiling matchers v0.2.0
   Compiling regex v1.12.2
   Compiling tracing-subscriber v0.3.23
   Compiling rustfix v0.8.7
   Compiling compiletest v0.0.0 (/checkout/src/tools/compiletest)
warning: unused dependency `unified-diff`
  --> src/tools/compiletest/Cargo.toml:37:1
   |
37 | unified-diff = "0.2.1"
   | ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `cargo::unused_dependencies` is set to `warn` by default
help: consider removing the dependency on `unified-diff`
warning: `compiletest` (manifest) generated 1 warning
    Finished `release` profile [optimized] target(s) in 7.36s
error: warnings are denied by `build.warnings` configuration

[weihanglo]

Okay so

• cargo::manual_readme — most of them are this. Easy fix
• compiletest has an unused dep unified-diff. Just drop it
• src/tools/rustdoc, clippy, rustfmt has non_kebab_case_bins lint errors. This might be a bit controversial, and to avoid being dragged into rename discussion we could probably just non_kebab_case_bins = "allow". However, that comes with an issue. opt-dist build use nightyl toolchain to test hence the failure. OTOH Bootstrap uses beta. If we add that allow compiler devs may start seeing warning: unused manifest key 'lints.cargo', which will be quite annoying.

[weihanglo]

However, that comes with an issue. opt-dist build use nightyl toolchain to test hence the failure. OTOH Bootstrap uses beta. If we add that allow compiler devs may start seeing warning: unused manifest key 'lints.cargo', which will be quite annoying.

The different cargo between bootstrap and opt-dist may become an annoying issue in the future whenever Cargo adds a new lint.

[Kobzol]

Can we just allow all Cargo lints during the opt-dist tests?

[weihanglo]

Can we just allow all Cargo lints during the opt-dist tests?

Hmm…, there is no environment variable can do that as of now except CARGO_BUILD_WARNINGS=allow.
Or we set in bootstrap.toml rust.deny-warnings = false? That sounds sloppier though.

And if we suppress Cargo lints in opt-dist, we still anyway need to fix those whenever that nightly got promoted to beta, which is a bit better but still annoying for beta bump PR.

How does rust-lang/rust deal with clippy lints in general? Does it apply only stable lints from nightly clippy?

[Kobzol]

We only enable a small subset of Clippy lints, and bump those manually (which doesn't happen often).

[weihanglo]

This is currently blocked on clippy subtree sync: #162135

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

[weihanglo]

@bors try jobs=dist-x86_64-linux

[rust-bors]

☀️ Try build successful (CI)
Build commit: afd69a1 (afd69a1d2fe6757eeb4e95d95157ef39a46d7e22)
Base parent: 59dabe5 (59dabe56f7b78d9dd427645cd7f8e7fd426724cc)

[weihanglo]

@bors r+ rollup=never p=1

[rust-bors]

📌 Commit b3d2bc2 has been approved by weihanglo

It is now in the queue for this repository.

[rust-bors]

☀️ Test successful - CI
Approved by: weihanglo
Duration: 2h 55m 12s
Pushing 2e2b193 to main...

[github-actions]

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 fb9a338 (parent) -> 2e2b193 (this PR)

Test differences

Show 33 test diffs

Stage 2

• build::should_not_include_direct_deps_paths_in_rustc_args: [missing] -> pass (J0)
• build::should_not_include_proc_macro_deps_paths_in_rustc_args: ignore (Depends on 61f3e08) -> pass (J0)
• build::should_only_include_dylibs_on_lib_search_path: ignore (Depends on 61f3e08) -> pass (J0)
• build_script::build_script_dylib_search_path_excludes_target_dylibs: ignore (Depends on 61f3e08) -> pass (J0)
• cache_messages::doesnt_create_extra_files: pass -> [missing] (J0)
• features::feature_metadata: [missing] -> pass (J0)
• features::feature_metadata_empty_enables: [missing] -> pass (J0)
• features::feature_metadata_is_unstable: [missing] -> pass (J0)
• features::feature_metadata_missing_enables: [missing] -> pass (J0)
• features::normalize_feature_metadata: [missing] -> pass (J0)
• features::unused_keys_in_feature_metadata: [missing] -> pass (J0)
• git::fetch_downloads_with_git2_first_then_with_gitoxide_and_vice_versa: pass -> [missing] (J0)
• git::fetch_downloads_with_gitoxide_then_git2: [missing] -> pass (J0)
• lints_table::cargo_lints_nightly_required: pass -> [missing] (J0)
• min_publish_age::feature_gated: pass -> [missing] (J0)
• min_publish_age::feature_gated_env: pass -> [missing] (J0)
• min_publish_age::warns_on_resolver_config_without_flag: pass -> [missing] (J0)
• profile_trim_paths::release_profile_default: [missing] -> pass (J0)
• profile_trim_paths::release_profile_default_to_object: pass -> [missing] (J0)
• sources::git::utils::test::git_version_empty: [missing] -> pass (J0)
• sources::git::utils::test::git_version_version: [missing] -> pass (J0)
• sources::git::utils::test::git_version_version_nl: [missing] -> pass (J0)
• sources::git::utils::test::git_version_version_platform: [missing] -> pass (J0)
• sources::git::utils::test::git_version_version_rc: [missing] -> pass (J0)
• sources::git::utils::test::git_version_version_unreleased: [missing] -> pass (J0)
• sources::git::utils::test::git_version_version_vendor: [missing] -> pass (J0)
• [run-make] tests/run-make/compressed-debuginfo-zstd: ignore (ignored if LLVM wasn't build with zstd for ELF section compression or LLVM is not the default codegen backend) -> pass (J1)

Additionally, 6 doctest diffs were found. These are ignored, as they are noisy.

Job group index

• J0: aarch64-apple-2, aarch64-apple-macos-26-2, aarch64-gnu, x86_64-gnu-aux, x86_64-msvc-ext1
• J1: x86_64-gnu-nopt

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 2e2b193f8ada105f27608b7be81c293e0d7292cb --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

1. x86_64-gnu-gcc-core-tests: 23m 33s -> 11m 6s (-52.9%)
2. x86_64-gnu-stdlib-semver-check: 23m 2s -> 10m 55s (-52.6%)
3. x86_64-gnu-llvm-21-1: 59m 37s -> 39m 26s (-33.9%)
4. x86_64-mingw-2: 2h 10m -> 2h 53m (+32.4%)
5. x86_64-gnu-gcc: 1h 32m -> 1h 4m (-31.1%)
6. x86_64-msvc-ext2: 1h 51m -> 1h 19m (-28.8%)
7. i686-gnu-nopt-1: 1h 40m -> 2h 8m (+28.6%)
8. dist-riscv64-linux-gnu: 1h 13m -> 1h 33m (+28.4%)
9. pr-check-1: 47m 55s -> 34m 38s (-27.7%)
10. x86_64-rust-for-linux: 1h 7m -> 50m 22s (-25.5%)

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]

Finished benchmarking commit (2e2b193): comparison URL.

Overall result: ❌✅ regressions and improvements - please read:

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

Next Steps:

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

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

Instruction count

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

	mean	range	count
Regressions ❌ (primary)	0.3%	[0.2%, 0.4%]	2
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-1.0%	[-2.1%, -0.1%]	11
All ❌✅ (primary)	0.3%	[0.2%, 0.4%]	2

Max RSS (memory usage)

Results (primary 2.1%, secondary 0.8%)

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

	mean	range	count
Regressions ❌ (primary)	2.1%	[2.1%, 2.1%]	1
Regressions ❌ (secondary)	4.5%	[0.7%, 7.3%]	5
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.8%	[-7.7%, -1.8%]	4
All ❌✅ (primary)	2.1%	[2.1%, 2.1%]	1

Cycles

Results (secondary 3.7%)

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)	8.7%	[4.7%, 10.7%]	4
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.0%	[-4.5%, -1.9%]	3
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: missing data
Artifact size: 401.19 MiB -> 401.96 MiB (0.19%)

[weihanglo]

FWIW, this cargo submodule includes the cargo lints stabilization, which sets --force-warn=unused_crate_dependencies and --json=unused_extern_silent for unused dependency detection. It may be a source of that perf regression?