Rollup of 7 pull requests #150796
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Rollup of 7 pull requests #150796
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It was added in ddee45e when SIGPIPE was controlled with an attribute on `fn main()` which meant it could also be combined with `#[rustc_main]`: #[unix_sigpipe = "sig_dfl"] #[rustc_main] fn rustc_main() { It stopped being needed cde0cde when `#[unix_sigpipe = "..."]` was replaced by `-Zon-broken-pipe=...`. And it will not be needed when `-Zon-broken-pipe=...` is replaced by an Externally Implementable Item. Let's remove this test.
In rust-lang#127273 I added a test and a FIXME comment pointing out how it does the wrong thing. In the next commit I fixed the problem but forgot to remove the FIXME comment, whoops.
MGCA: Support tuple expressions as direct const arguments Tracking issue: rust-lang#132980 Fixes rust-lang#133965 Fixes rust-lang#150613 r? @BoxyUwU
enrich error info when tries to dlopen Enzyme related: rust-lang#145899 (comment) print error from EnzymeWrapper::get_or_init(sysroot) as a note r? @ZuseZ4 e.g. 1. when libEnzyme not found ```shell $ rustc +stage1 -Z autodiff=Enable -C lto=fat src/main.rs error: autodiff backend not found in the sysroot: failed to find a `libEnzyme-21` folder in the sysroot candidates: * /Volumes/WD_BLACK_SN850X_HS_1TB/rust-lang/rust/build/aarch64-apple-darwin/stage1/lib | = note: it will be distributed via rustup in the future ``` 2. when could not load libEnzyme successfully ```shell rustc +stage1 -Z autodiff=Enable -C lto=fat src/main.rs error: failed to load our autodiff backend: DlOpen { source: "dlopen(/Volumes/WD_BLACK_SN850X_HS_1TB/rust-lang/rust/build/aarch64-apple-darwin/stage1/lib/rustlib/aarch64-apple-darwin/lib/libEnzyme-21.dylib, 0x0005): tried: \'/Volumes/WD_BLACK_SN850X_HS_1TB/rust-lang/rust/build/aarch64-apple-darwin/stage1/lib/rustlib/aarch64-apple-darwin/lib/libEnzyme-21.dylib\' (slice is not valid mach-o file), \'/System/Volumes/Preboot/Cryptexes/OS/Volumes/WD_BLACK_SN850X_HS_1TB/rust-lang/rust/build/aarch64-apple-darwin/stage1/lib/rustlib/aarch64-apple-darwin/lib/libEnzyme-21.dylib\' (no such file), \'/Volumes/WD_BLACK_SN850X_HS_1TB/rust-lang/rust/build/aarch64-apple-darwin/stage1/lib/rustlib/aarch64-apple-darwin/lib/libEnzyme-21.dylib\' (slice is not valid mach-o file)" } ```
Deprecated doc intra link Commit rust-lang#147526 removed the following code and replaced it with the `AllocatorMethod`. However, its input is empty, resulting in behavior inconsistent with the previous code. ```rust create_wrapper_function( tcx, &cx, &mangle_internal_symbol(tcx, "__rust_alloc_error_handler"), Some(&mangle_internal_symbol(tcx, alloc_error_handler_name(alloc_error_handler_kind))), &[usize, usize], // size, align None, true, &CodegenFnAttrs::new(), ); ``` resolves rust-lang#150755
tests/ui/runtime/on-broken-pipe/with-rustc_main.rs: Not needed so remove It was added in ddee45e ([here](https://github.com/rust-lang/rust/pull/97802/changes#diff-85dc642a7bdad363a9e37d2491230280fcd977391ba7a242bda2da9ddb55f654) to be specific) when SIGPIPE was controlled with an attribute on `fn main()` which meant it could also be combined with `#[rustc_main]`: #[unix_sigpipe = "sig_dfl"] #[rustc_main] fn rustc_main() { The test stopped being needed in cde0cde when `#[unix_sigpipe = "..."]` was replaced by `-Zon-broken-pipe=...`. And it will not be needed when `-Zon-broken-pipe=...` is replaced by an Externally Implementable Item (see rust-lang#150591). Let's remove this test. Tracking issue: - rust-lang#150588
Fix `alloc_error_handler` signature mismatch fixes rust-lang#98342 r? @GuillaumeGomez Renders intra-doc links in the note text of the `#[deprecated]` attribute. It is quite natural to suggest some other function to use there. So e.g. ```rust #[deprecated(since = "0.0.0", note = "use [`std::mem::size_of`] instead")] ``` renders as <img width="431" height="74" alt="Screenshot from 2026-01-06 12-08-21" src="https://github.com/user-attachments/assets/8f608f08-13ee-4bbf-a631-6008058a51e2" />
Stabilize `slice::element_offset` In rust-lang#127273 I added a test and a FIXME comment pointing out how it does the wrong thing. In the next commit I fixed the problem but forgot to remove the FIXME comment, whoops.
Remove out of date FIXME comment. [slice::element_offset](https://doc.rust-lang.org/std/primitive.slice.html#method.element_offset) Partially stabilizes rust-lang#126769 (substr_range). [FCP completed](rust-lang#126769 (comment)) The other methods are [stalled because of the new range types](rust-lang#126769 (comment)), but this method doesn't use ranges.
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Successful merges:
alloc_error_handlersignature mismatch #150757 (Fixalloc_error_handlersignature mismatch)slice::element_offset#150777 (Stabilizeslice::element_offset)r? @ghost
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