Rollup of 9 pull requests by JonathanBrouwer · Pull Request #160774 · rust-lang/rust

JonathanBrouwer · 2026-08-08T20:16:50Z

Successful merges:

Introduce a PinSafePointer trait that generalizes PinCoerceUnsized #156935 (Introduce a PinSafePointer trait that generalizes PinCoerceUnsized)
Apply str debugger visualizer to *const str, *mut str and Box<str> #159834 (Apply str debugger visualizer to *const str, *mut str and Box<str>)
Suggest add async for function sig with return expr in body #160663 (Suggest add async for function sig with return expr in body)
Optimize slice::contains for one-byte BytewiseEq types #160732 (Optimize slice::contains for one-byte BytewiseEq types)
Make char::is_default_ignorable unstably public #157944 (Make char::is_default_ignorable unstably public)
rustc_passes: lint unused #[path] attributes on inline modules #158835 (rustc_passes: lint unused #[path] attributes on inline modules)
Rename more diagnostic files to diagnostics.rs #160754 (Rename more diagnostic files to diagnostics.rs)
Merge rustc_lint/lints.rs into diagnostics.rs #160755 (Merge rustc_lint/lints.rs into diagnostics.rs)
Merge rustc_attr_parsing/session_diagnostics.rs into diagnostics.rs #160757 (Merge rustc_attr_parsing/session_diagnostics.rs into diagnostics.rs)

* Make `char::is_default_ignorable` unstably public * Add tracking issue Co-authored-by: Jules Bertholet <jules@bertholet.email>

…Simulacrum Introduce a `PinSafePointer` trait that generalizes `PinCoerceUnsized` This PR renames `PinCoerceUnsized` to `PinSafePointer` and adds several new safety requirements about the implementations of various safe traits. Closes: rust-lang#152667 Closes: rust-lang#147794 ~~With this merged, the only remaining soundness issues with `Pin` are:~~ * rust-lang#134407 * The fact that `CoercePointee` may be implemented on `Pin<LocalType>` in downstream crates. (unstable only) For your convenience here are the docs for the new trait: # `PinSafePointer` Trait that indicates that this is a pointer that does not misbehave when combined with `Pin`. Note that for backwards compatibility reasons, it is possible to create a `Pin<P>` for pointer types `P` that do not implement this trait. However, this can only be done safely if `<P as Deref>::Target` implements `Unpin`, which means that pinning has no effect. # Safety Types that implement this trait must not provide "malicious" implementations of any safe traits used by `Pin`. ## The pointer must always reference the same object Calls to [`deref`]/[`deref_mut`] on the same `Pin<P>` instance must always refer to the same object. That is, the address returned by these methods must not change. This applies even if the pointer type is moved. Furthermore, if the pointer type can participate in unsizing coercions or dynamic dispatch, then these coercions must also not change the underlying concrete type. Here, the concrete type of a trait object is the type that the vtable corresponds to. The concrete type of a slice is an array of the same element type and the length specified in the metadata. The concrete type of a sized type is the type itself. As an example, after unsizing coercing a pinned pointer, `deref_mut` must not return a `#[repr(transparent)]` wrapper around the value it referenced before being unsized, even if the address is unchanged. ## The pointer must not move its pointee The [`deref_mut`] method and the pointer type's destructor are called with a `&mut self` receiver, but they must behave as-if it was a `self: Pin<&mut Self>` receiver. That is, they must not move out of the underlying value. As an example, `deref_mut` must not invoke `swap` on the inner value. ## Shared access to the pointer If this pointer type uses `&P` references as evidence that this value is not pinned, then it must not treat the `&self` argument passed to [`Clone`] or the formatting traits (`fmt::Debug`, `fmt::Display`, `fmt::Pointer`) as such evidence. As an example, given a `Pin<Arc<T>>` there is no way to obtain an `&Arc<T>` (note that `Deref` just gives a `&T`). Because of this, the [`Arc`] type can assume that an `&Arc<T>` value can only exist if the `T` is not pinned, which justifies the soundness of the [`Arc::get_mut`] method. ## Cloning pinned pointers When a `Pin<P>` is cloned, the `P` pointer value returned by `clone` is passed to [`Pin::new_unchecked`]. The implementation of [`Clone`] must return a value such that this is sound. For example, when a `Pin<&T>` is cloned, the resulting `&T` points at the same value. The value is known to be pinned since a `Pin<&T>` to it exists, so it is safe to wrap the `&T` returned by `clone` in `Pin`. [`deref`]: https://doc.rust-lang.org/stable/core/ops/trait.Deref.html#tymethod.deref [`deref_mut`]: https://doc.rust-lang.org/stable/core/ops/trait.DerefMut.html#tymethod.deref_mut [`clone`]: https://doc.rust-lang.org/stable/core/clone/trait.Clone.html#tymethod.clone [`Clone`]: https://doc.rust-lang.org/stable/core/clone/trait.Clone.html [`Arc`]: https://doc.rust-lang.org/stable/std/sync/struct.Arc.html [`Arc::get_mut`]: https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.get_mut [`Pin::new_unchecked`]: https://doc.rust-lang.org/stable/std/pin/struct.Pin.html#method.new_unchecked r? lcnr

Apply str debugger visualizer to `*const str`, `*mut str` and `Box<str>` Fairly straightforward. Note that the MSVC changes very likely aren't exercised by CI. My GSoC project is actively working on fixing that, but in the meantime i can personally verify that it works (note that the `ref$<str$> *` type name confirms this is MSVC): <img width="318" height="138" alt="image" src="https://github.com/user-attachments/assets/fd868f16-d9a5-438a-a155-a429771bf525" />

@estebank

…st-async-return-future, r=estebank Suggest add async for function sig with return expr in body Fixes rust-lang#159495 r? @estebank

…ewise-contains, r=joboet Optimize slice::contains for one-byte BytewiseEq types add optimized searches for NonZeroI8, option<NonZeroI8> ordering, and other one-byte types

@rustbot

…le, r=Mark-Simulacrum Make `char::is_default_ignorable` unstably public Similar to rust-lang#154849; this function is used in the implementation of `char::escape_debug()`, and there's no reason to force crates to duplicate a data table that std has to ship anyway. I'll add a tracking issue if this is approved. (I'll do the other data tables from rust-lang#155527 in separate PRs.) @rustbot label A-Unicode T-libs-api Tracking issue: rust-lang#160583 r? @Mark-Simulacrum

@theemathas

…=JonathanBrouwer rustc_passes: lint unused `#[path]` attributes on inline modules Closes rust-lang#157260. This PR emits the `unused_attributes` lint for `#[path]` attributes on inline modules when the attribute is unused. It also adds UI tests covering both linted and non-linted cases. r? @theemathas

@GuillaumeGomez

…1, r=GuillaumeGomez Rename more diagnostic files to `diagnostics.rs` Renaming diagnostics files to all be `diagnostics.rs`, per the decision in rust-lang/compiler-team#1003 PR was created by doing a file rename using the editor actions of my IDE, and then running `./x fmt` r? @GuillaumeGomez @nnethercote Whoever of you gets to it first :)

@GuillaumeGomez

…r=GuillaumeGomez Merge `rustc_lint/lints.rs` into `diagnostics.rs` Renaming diagnostics files to all be diagnostics.rs, per the decision in rust-lang/compiler-team#1003 r? @GuillaumeGomez

@GuillaumeGomez

…ostics, r=GuillaumeGomez Merge `rustc_attr_parsing/session_diagnostics.rs` into `diagnostics.rs` Renaming diagnostics files to all be diagnostics.rs, per the decision in rust-lang/compiler-team#1003 r? @GuillaumeGomez

JonathanBrouwer · 2026-08-08T20:17:00Z

@bors r+ p=5

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

rust-bors · 2026-08-08T20:17:03Z

📌 Commit 3da16bb has been approved by JonathanBrouwer

It is now in the queue for this repository.

Rollup of 9 pull requests try-job: dist-various-1 try-job: test-various try-job: x86_64-gnu-aux try-job: x86_64-gnu-llvm-21-3 try-job: x86_64-msvc-1 try-job: aarch64-apple-* try-job: x86_64-mingw-1 try-job: i686-msvc-*

rust-log-analyzer · 2026-08-08T22:43:11Z

The job optional-x86_64-gnu-autodiff failed! Check out the build log: (web) (plain enhanced) (plain)

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

46 
+ error[E0658]: macro attributes on statements are unstable
+   --> $DIR/autodiff_illegal.rs:49:5
+    |
+ LL |     #[autodiff_forward(df7, Dual)]
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+    = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
+    = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
+    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+ 
47 error: autodiff must be applied to function
48   --> $DIR/autodiff_illegal.rs:50:5
49    |

50 LL |     let mut x = 5;
51    |     ^^^^^^^^^^^^^^
52 
+ error[E0658]: macro attributes on expressions are unstable
+   --> $DIR/autodiff_illegal.rs:53:5
+    |
+ LL |     #[autodiff_forward(df7, Dual)]
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+    = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
+    = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
+    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+ 
53 error: autodiff must be applied to function
54   --> $DIR/autodiff_illegal.rs:54:5
55    |

56 LL |     x = x + 3;
57    |     ^
58 
+ error[E0658]: macro attributes on statements are unstable
+   --> $DIR/autodiff_illegal.rs:58:5
+    |
+ LL |     #[autodiff_forward(df7, Dual)]
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+    = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
+    = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
+    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+ 
59 error: autodiff must be applied to function
60   --> $DIR/autodiff_illegal.rs:59:5
61    |

124 LL | #[autodiff_reverse(df21, Active, Duplicated)]
125    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
126 
- error: aborting due to 18 previous errors
+ error: aborting due to 21 previous errors
128 
---
-   --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:58:5
+ error[E0658]: macro attributes on statements are unstable
+   --> $DIR/autodiff_illegal.rs:49:5
+    |
+ LL |     #[autodiff_forward(df7, Dual)]
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+    = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
+    = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
+    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+ 
+ error[E0658]: macro attributes on expressions are unstable
+   --> $DIR/autodiff_illegal.rs:53:5
+    |
+ LL |     #[autodiff_forward(df7, Dual)]
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+    = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
+    = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
+    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+ 
+ error[E0658]: macro attributes on statements are unstable
+   --> $DIR/autodiff_illegal.rs:58:5
+    |
+ LL |     #[autodiff_forward(df7, Dual)]
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+    = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
+    = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
+    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+ 
+ error: aborting due to 21 previous errors


The actual stderr differed from the expected stderr
To update references, rerun the tests and pass the `--bless` flag
To only update this specific test, also pass `--test-args autodiff/autodiff_illegal.rs`

error: 1 errors occurred comparing output.
status: exit status: 1
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/autodiff/autodiff_illegal.rs" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/autodiff/autodiff_illegal" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "incomplete_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
error[E0658]: attributes on expressions are experimental
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:53:5
   |
LL |     #[autodiff_forward(df7, Dual)]
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error: Duplicated can not be used for this type
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:14:14
   |
LL | pub fn f1(x: f64) {
---

error: Dual can not be used in Reverse Mode
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:34:1
   |
LL | #[autodiff_reverse(df5, Dual)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: Duplicated can not be used in Forward Mode
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:41:1
   |
---

error[E0658]: macro attributes on statements are unstable
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:49:5
   |
LL |     #[autodiff_forward(df7, Dual)]
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error: autodiff must be applied to function
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:50:5
   |
LL |     let mut x = 5;
   |     ^^^^^^^^^^^^^^

error[E0658]: macro attributes on expressions are unstable
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:53:5
   |
LL |     #[autodiff_forward(df7, Dual)]
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error: autodiff must be applied to function
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:54:5
   |
LL |     x = x + 3;
   |     ^

error[E0658]: macro attributes on statements are unstable
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:58:5
   |
LL |     #[autodiff_forward(df7, Dual)]
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information
   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error: autodiff must be applied to function
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:59:5
   |
LL |     let add_one_v2 = |x: u32| -> u32 { x + 1 };
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: autodiff requires at least a name and mode
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:65:1
   |
---
   |
LL | fn fn_exists() {}
   | -------------- previous definition of the value `fn_exists` here
...
LL | #[autodiff_reverse(fn_exists, Active)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `fn_exists` redefined here
   |
   = note: `fn_exists` must be defined only once in the value namespace of this module

error: did not recognize Activity: `Reverse`
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:95:26
   |
LL | #[autodiff_reverse(df13, Reverse)]
   |                          ^^^^^^^

error: invalid return activity Active in Forward Mode
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:131:1
   |
LL | #[autodiff_forward(df19, Dual, Active)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: invalid return activity Dual in Reverse Mode
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:137:1
   |
LL | #[autodiff_reverse(df20, Active, Dual)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: invalid return activity Duplicated in Reverse Mode
##[error]  --> /checkout/tests/ui/autodiff/autodiff_illegal.rs:144:1
   |
LL | #[autodiff_reverse(df21, Active, Duplicated)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 21 previous errors

Some errors have detailed explanations: E0428, E0658.
---
[TIMING:end] test::Ui { test_compiler: Compiler { stage: 2, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu } -- 0.000

1 command(s) did not execute successfully:

  - env -u CARGO DOC_RUST_LANG_ORG_CHANNEL="https://doc.rust-lang.org/nightly" LD_LIBRARY_PATH="" RUSTC="/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/rustc" RUSTC_BOOTSTRAP="1" RUSTC_FORCE_RUSTC_VERSION="compiletest" RUST_TEST_THREADS="4" RUST_TEST_TMPDIR="/checkout/obj/build/tmp" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools-bin/compiletest" "--stage" "2" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--minicore-path" "/checkout/tests/auxiliary/minicore.rs" "--src-root" "/checkout" "--src-test-suite-root" "/checkout/tests/ui" "--build-root" "/checkout/obj/build" "--build-test-suite-root" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--sysroot-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--suite" "ui" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/checkout/obj/build/x86_64-unknown-linux-gnu/llvm/build/bin/FileCheck" "--default-codegen-backend" "llvm" "--has-enzyme" "--optimize-tests" "--host-rustcflags" "-Crpath" "--host-rustcflags" "-Cdebuginfo=0" "--host-rustcflags" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath" "--target-rustcflags" "-Cdebuginfo=0" "--target-rustcflags" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--python" "/usr/bin/python3" "autodiff" "feature-gates/feature-gate-autodiff.rs" "--verbose-run-make-subprocess-output" "--with-rustc-debug-assertions" "--with-std-debug-assertions" "--jobs" "4" "--llvm-version" "23.1.0-rust-1.99.0-nightly" "--llvm-components" "aarch64 aarch64asmparser aarch64codegen aarch64desc aarch64disassembler aarch64info aarch64utils abi aggressiveinstcombine all all-targets amdgpu amdgpuasmparser amdgpucodegen amdgpudesc amdgpudisassembler amdgpuinfo amdgputargetmca amdgpuutils analysis arm armasmparser armcodegen armdesc armdisassembler arminfo armutils asmparser asmprinter avr avrasmparser avrcodegen avrdesc avrdisassembler avrinfo binaryformat bitreader bitstreamreader bitwriter bpf bpfasmparser bpfcodegen bpfdesc bpfdisassembler bpfinfo cas cfguard cgdata codegen codegentypes core coroutines coverage csky cskyasmparser cskycodegen cskydesc cskydisassembler cskyinfo debuginfobtf debuginfocodeview debuginfodwarf debuginfodwarflowlevel debuginfogsym debuginfologicalview debuginfomsf debuginfopdb demangle dlltooldriver dtlto dwarfcfichecker dwarflinker dwarflinkerclassic dwarflinkerparallel dwp engine executionengine extensions filecheck frontendatomic frontenddirective frontenddriver frontendhlsl frontendoffloading frontendopenacc frontendopenmp fuzzercli fuzzmutate globalisel hexagon hexagonasmparser hexagoncodegen hexagondesc hexagondisassembler hexagoninfo hipstdpar instcombine instrumentation interfacestub interpreter ipo irprinter irreader jitlink libdriver lineeditor linker loongarch loongarchasmparser loongarchcodegen loongarchdesc loongarchdisassembler loongarchinfo lto m68k m68kasmparser m68kcodegen m68kdesc m68kdisassembler m68kinfo mc mca mcdisassembler mcjit mcparser mips mipsasmparser mipscodegen mipsdesc mipsdisassembler mipsinfo mirparser msp430 msp430asmparser msp430codegen msp430desc msp430disassembler msp430info native nativecodegen nvptx nvptxcodegen nvptxdesc nvptxinfo objcarcopts objcopy object objectyaml option orcdebugging orcjit orcshared orctargetprocess passes plugins powerpc powerpcasmparser powerpccodegen powerpcdesc powerpcdisassembler powerpcinfo profiledata remarks riscv riscvasmparser riscvcodegen riscvdesc riscvdisassembler riscvinfo riscvtargetmca runtimedyld sandboxir scalaropts selectiondag sparc sparcasmparser sparccodegen sparcdesc sparcdisassembler sparcinfo support supportlsp symbolize systemz systemzasmparser systemzcodegen systemzdesc systemzdisassembler systemzinfo tablegen target targetparser telemetry textapi textapibinaryreader transformutils vectorize webassembly webassemblyasmparser webassemblycodegen webassemblydesc webassemblydisassembler webassemblyinfo webassemblyutils windowsdriver windowsmanifest x86 x86asmparser x86codegen x86desc x86disassembler x86info x86targetmca xray xtensa xtensaasmparser xtensacodegen xtensadesc xtensadisassembler xtensainfo" "--cc" "" "--cxx" "" "--cflags" "" "--cxxflags" "" "--channel" "nightly" "--git-hash" "--nightly-branch" "main" "--git-merge-commit-email" "bors@rust-lang.org" (failure_mode=Exit)
Bootstrap failed while executing `test --stage 2 --no-fail-fast tests/codegen-llvm/autodiff tests/pretty/autodiff tests/ui/autodiff tests/ui/feature-gates/feature-gate-autodiff.rs`
Currently active steps:
Build completed unsuccessfully in 0:53:56
  local time: Sat Aug  8 22:42:54 UTC 2026
  network time: Sat, 08 Aug 2026 22:42:55 GMT

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For more information how to resolve CI failures of this job, visit this link.

rust-bors · 2026-08-08T23:23:48Z

☀️ Try build successful (CI)
Build commit: ac81f06 (ac81f062c518e5c535718781c744afdd924f4a5c)
Base parent: 771916f (771916f9028e7fe56d2685f2c4f698de5d7d6a45)

rust-bors · 2026-08-09T00:51:14Z

☀️ Test successful - CI
Approved by: JonathanBrouwer
Duration: 3h 6m 19s
Pushing 4667d75 to main...

rust-timer · 2026-08-09T00:53:55Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#156935	Introduce a `PinSafePointer` trait that generalizes `PinCoe…	`714a9401708f7362212ba02ce7e067bfe870b2d9` (link)
#159834	Apply str debugger visualizer to `const str`, `mut str` a…	`d4dd1f771da6d575f4a23513371444afc29ffb27` (link)
#160663	Suggest add async for function sig with return expr in body	`fb8e8095b762d797e1dbf213af6c98c62e0e050a` (link)
#160732	Optimize slice::contains for one-byte BytewiseEq types	`5e15c0a80a5fa37f83d176c6bd4564123832dacd` (link)
#157944	Make `char::is_default_ignorable` unstably public	`380580ac9a9bed914ca961241feca721458c8bad` (link)
#158835	rustc_passes: lint unused `#[path]` attributes on inline mo…	`a3d850ca2ca4d81093ae87f2fbe38378404afec4` (link)
#160754	Rename more diagnostic files to `diagnostics.rs`	`5ff30ed6456d3ba0c44f7fc032482587b957ab0d` (link)
#160755	Merge `rustc_lint/lints.rs` into `diagnostics.rs`	`84d9202b2342b20652b2186dae0d5d4e3c8b6e86` (link)
#160757	Merge `rustc_attr_parsing/session_diagnostics.rs` into `dia…	`32136cb425e02a0b87e5d9053a3dba59d42c10c5` (link)

previous master: 771916f902

In the case of a perf regression, run the following command for each PR you suspect might be the cause: @rust-timer build $SHA

rust-log-analyzer · 2026-08-09T01:02:06Z

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rust-timer · 2026-08-09T01:35:05Z

Finished benchmarking commit (4667d75): comparison URL.

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

@rustbot label: -perf-regression

Instruction count

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

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.6%	[0.6%, 0.6%]	2
Improvements ✅ (primary)	-0.4%	[-0.4%, -0.3%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.4%	[-0.4%, -0.3%]	2

Max RSS (memory usage)

Results (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)	-	-	0
Regressions ❌ (secondary)	0.8%	[0.4%, 2.3%]	12
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-6.2%	[-6.2%, -6.2%]	1
All ❌✅ (primary)	-	-	0

Cycles

Results (secondary 0.5%)

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)	1.3%	[0.4%, 9.3%]	13
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.9%	[-1.7%, -0.6%]	7
All ❌✅ (primary)	-	-	0

Binary size

Results (primary 0.2%, secondary 0.2%)

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

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

Bootstrap: 458.289s -> 458.83s (0.12%)
Artifact size: 398.65 MiB -> 398.59 MiB (-0.01%)

Walnut356 and others added 22 commits July 24, 2026 07:11

apply str visualizer to *const, *mut and Box<str>

69edf45

Generalize PinCoerceUnsized into a new PinSafePointer trait

ef9e727

Suggest add async for function sig with return expr in body

aed866a

Optimize slice::contains for one-byte BytewiseEq types

8109a4b

Rename rustc_query_impl/error.rs to diagnostics.rs

57a3593

Rename rustc_middle/error.rs to diagnostics.rs

98621aa

Rename rustc_driver_impl/session_diagnostics.rs to diagnostics.rs

f03631c

Merge rustc_lint/lints.rs into diagnostics.rs

92c6357

Merge rustc_attr_parsing/session_diagnostics.rs into diagnostics.rs

442b3ec

Make char::is_default_ignorable unstably public

9846cb6

* Make `char::is_default_ignorable` unstably public * Add tracking issue Co-authored-by: Jules Bertholet <jules@bertholet.email>

Use transmute_copy in SliceContains

c0a4462

Apply rustfmt to SliceContains

538b303

rustc_passes: lint unused #[path] attributes on inline modules

7b1731b

Rollup merge of rust-lang#160663 - chenyukang:yukang-fix-159495-sugge…

a7c3bd1

…st-async-return-future, r=estebank Suggest add async for function sig with return expr in body Fixes rust-lang#159495 r? @estebank

Rollup merge of rust-lang#160732 - SomeFlyingThing:agent/optimize-byt…

cc2a0a4

…ewise-contains, r=joboet Optimize slice::contains for one-byte BytewiseEq types add optimized searches for NonZeroI8, option<NonZeroI8> ordering, and other one-byte types

Rollup merge of rust-lang#160755 - JonathanBrouwer:rustc_lint_diags, …

487d6a6

…r=GuillaumeGomez Merge `rustc_lint/lints.rs` into `diagnostics.rs` Renaming diagnostics files to all be diagnostics.rs, per the decision in rust-lang/compiler-team#1003 r? @GuillaumeGomez

rust-bors Bot added the rollup A PR which is a rollup label Aug 8, 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 Aug 8, 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 Aug 9, 2026

rust-bors Bot merged commit 4667d75 into rust-lang:main Aug 9, 2026
15 checks passed

rustbot added this to the 1.99.0 milestone Aug 9, 2026

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Rollup of 9 pull requests - #160774

Rollup of 9 pull requests#160774
rust-bors[bot] merged 22 commits into
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Overall result: ❌✅ regressions and improvements - no action needed

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