Rollup of 12 pull requests #149368

Zalathar · 2025-11-27T01:36:56Z

Successful merges:

More robust stack protector testing #147115 (More robust stack protector testing)
Stabilize maybe_uninit_write_slice #148048 (Stabilize maybe_uninit_write_slice)
Add a diagnostic attribute for special casing const bound errors for non-const impls #148641 (Add a diagnostic attribute for special casing const bound errors for non-const impls)
Add Command::get_env_clear #149074 (Add Command::get_env_clear)
num: Implement uint_gather_scatter_bits feature for unsigned integers #149097 (num: Implement uint_gather_scatter_bits feature for unsigned integers)
optimize slice::Iter::next_chunk #149131 (optimize slice::Iter::next_chunk)
Forbid CHECK: br and CHECK-NOT: br in codegen tests (suggest br {{.*}} instead) #149190 (Forbid CHECK: br and CHECK-NOT: br in codegen tests (suggest br {{.*}} instead))
clarify float min/max behavios for NaNs and signed zeros #149239 (clarify float min/max behavios for NaNs and signed zeros)
Fix typo and clarify bootstrap change tracker entry #149243 (Fix typo and clarify bootstrap change tracker entry)
Motor OS: make decode_error_kind more comprehensive #149301 (Motor OS: make decode_error_kind more comprehensive)
bootstrap: Miri now handles jemalloc like everything else #149306 (bootstrap: Miri now handles jemalloc like everything else)
rustdoc: add regression test for #140968 #149325 (rustdoc: add regression test for rustdoc search: if all else is equal, rank alias results lower #140968)

r? @ghost
@rustbot modify labels: rollup

This addition allows an end-user to inspect whether the env clear value is set on a `Command` instance or not. Discussed in: - rust-lang#149070 - rust-lang/libs-team#194

v0 mangling can produce symbols with 'br' as a substring, leading to false positives for CHECK-NOT

…en tests

mostly: `par` -> `per` but also move some words around and hyphenate to (hopefully) make sentence a bit clearer

Implement `gather_bits`, `scatter_bits` functions on unsigned integers Add tests to coretests

…non-const impls

More robust stack protector testing I've added some tests related to the stack protector. These tests were originally in the LLVM stack protector test project. These tests were written for the "Stabilize stack-protector" proposal, and therefore removed the "stack-protector=basic" test option, as this stack protector was considered ineffective in Rust. For the proposal, see: rust-lang#146369 For the discussion, see zulip: https://rust-lang.zulipchat.com/#narrow/channel/233931-t-compiler.2Fmajor-changes/topic/Proposal.20for.20Adapt.20Stack.20Protector.20for.20Ru.E2.80.A6.20compiler-team.23841 I have opened an issue to discuss the 'abi_mismatch' issue I encountered while writing tests for the coexistence of 'stack-protector' and 'safe-stack': rust-lang#149340 r? `@wesleywiser` (feel free to reassign) cc `@nikic,` `@rcvalle,` `@davidtwco,` `@arielb1,` `@Darksonn,` `@Noratrieb,` `@SparrowLii`

…write-slice, r=Mark-Simulacrum Stabilize `maybe_uninit_write_slice` Stabilize feature `maybe_uninit_write_slice` (closes rust-lang#79995). Note that this also const-stabilizes `<[MaybeUninit<_>]>::write_copy_of_slice`. That method depends on `<[_]>::copy_from_slice`, which is already const-stable, and `<[MaybeUninit<_>]>::assume_init_mut` which is now also stable.

Add a diagnostic attribute for special casing const bound errors for non-const impls Somewhat of a follow-up to rust-lang#144194 My plan is to resolve https://github.com/rust-lang/rust/blob/f4e19c68786211f3c3cf2593442629599678800a/compiler/rustc_hir_typeck/src/callee.rs#L907-913 but doing so without being able to mark impls the way I do in this PR wrould cause all nice diagnostics about for loops and pointer comparisons to just be a `*const u32 does not implement [const] PartialEq` errors.

…=Mark-Simulacrum Add Command::get_env_clear This addition allows an end-user to inspect whether the env clear value is set on a `Command` instance or not. Discussed in: - Tracking issue: rust-lang#149070 (partially closes) - ACP: rust-lang/libs-team#194

…k-Simulacrum num: Implement `uint_gather_scatter_bits` feature for unsigned integers Feature gate: `#![feature(uint_gather_scatter_bits)]` Tracking issue: rust-lang#149069 Accepted ACP: rust-lang/libs-team#695 (comment) Implement `gather_bits`, `scatter_bits` functions on unsigned integers Add tests to coretests This implementation is a small improvement over the plain naive form (see the [solution sketch](rust-lang/libs-team#695)). We only check the set bits in the mask instead of iterating over every bit.

…unk, r=Mark-Simulacrum optimize `slice::Iter::next_chunk` codegen for example (sourced from rust-lang#98326 (comment)) ```rust pub fn simd_sum_slow(arr: &[u32]) -> u32 { const STEP_SIZE: usize = 16; let mut result = [0; STEP_SIZE]; let mut iter = arr.iter(); while let Ok(c) = iter.next_chunk::<STEP_SIZE>() { for (&n, r) in c.iter().zip(result.iter_mut()) { *r += n; } } result.iter().sum() } ``` goes from (znver4) <details> <summary>many asm</summary> ```assembly simd_sum_slow: .cfi_startproc push rbp .cfi_def_cfa_offset 16 push r15 .cfi_def_cfa_offset 24 push r14 .cfi_def_cfa_offset 32 push r13 .cfi_def_cfa_offset 40 push r12 .cfi_def_cfa_offset 48 push rbx .cfi_def_cfa_offset 56 sub rsp, 240 .cfi_def_cfa_offset 296 .cfi_offset rbx, -56 .cfi_offset r12, -48 .cfi_offset r13, -40 .cfi_offset r14, -32 .cfi_offset r15, -24 .cfi_offset rbp, -16 lea r12, [rdi + 4*rsi] mov qword ptr [rsp - 32], 0 mov dword ptr [rsp - 88], 0 mov dword ptr [rsp - 100], 0 mov dword ptr [rsp - 72], 0 mov dword ptr [rsp - 96], 0 mov dword ptr [rsp - 92], 0 mov dword ptr [rsp - 52], 0 mov dword ptr [rsp - 84], 0 mov dword ptr [rsp - 80], 0 mov dword ptr [rsp - 76], 0 mov dword ptr [rsp - 44], 0 mov dword ptr [rsp - 68], 0 mov dword ptr [rsp - 64], 0 mov dword ptr [rsp - 60], 0 mov dword ptr [rsp - 56], 0 mov dword ptr [rsp - 48], 0 mov qword ptr [rsp + 224], r12 cmp rdi, r12 mov qword ptr [rsp + 96], rdi je .LBB12_2 .p2align 4 .LBB12_3: lea r13, [rdi + 4] cmp r13, r12 je .LBB12_4 lea r15, [rdi + 8] cmp r15, r12 je .LBB12_6 lea r14, [rdi + 12] cmp r14, r12 je .LBB12_8 lea rbx, [rdi + 16] cmp rbx, r12 je .LBB12_10 lea r11, [rdi + 20] cmp r11, r12 je .LBB12_12 lea r10, [rdi + 24] cmp r10, r12 je .LBB12_14 lea r9, [rdi + 28] cmp r9, r12 je .LBB12_16 lea r8, [rdi + 32] cmp r8, r12 je .LBB12_18 lea rax, [rdi + 36] cmp rax, r12 je .LBB12_20 mov qword ptr [rsp - 120], rax lea rax, [rdi + 40] mov qword ptr [rsp - 112], rax cmp rax, r12 je .LBB12_22 lea rdx, [rdi + 44] cmp rdx, r12 je .LBB12_24 lea rbp, [rdi + 48] cmp rbp, r12 je .LBB12_26 mov qword ptr [rsp - 40], r9 lea rcx, [rdi + 52] cmp rcx, r12 je .LBB12_30 lea r9, [rdi + 56] cmp r9, r12 je .LBB12_32 lea rax, [rdi + 60] cmp rax, r12 mov qword ptr [rsp - 24], r9 je .LBB12_34 mov qword ptr [rsp + 88], rax lea rax, [rdi + 64] mov qword ptr [rsp - 8], rax mov dword ptr [rsp - 128], 0 mov qword ptr [rsp - 16], rdi mov qword ptr [rsp + 56], r10 lea r10, [rsp + 216] mov qword ptr [rsp + 40], r10 mov qword ptr [rsp + 96], r13 lea rax, [rsp + 208] mov qword ptr [rsp + 32], rax mov qword ptr [rsp + 72], rdx lea rsi, [rsp + 200] mov qword ptr [rsp + 48], rbx lea rbx, [rsp + 192] mov qword ptr [rsp + 80], rcx lea rcx, [rsp + 184] mov qword ptr [rsp + 64], rbp lea rdx, [rsp + 176] mov qword ptr [rsp + 16], r14 lea r14, [rsp + 168] mov qword ptr [rsp + 24], r11 lea r11, [rsp + 160] lea r9, [rsp + 152] lea r12, [rsp + 144] lea r13, [rsp + 136] lea rbp, [rsp + 128] mov qword ptr [rsp], r15 lea r15, [rsp + 120] mov qword ptr [rsp + 8], r8 lea r8, [rsp + 112] lea rdi, [rsp + 104] jmp .LBB12_39 .p2align 4 .LBB12_2: mov qword ptr [rsp - 128], 0 jmp .LBB12_37 .p2align 4 .LBB12_4: mov eax, 1 mov qword ptr [rsp - 128], rax jmp .LBB12_37 .p2align 4 .LBB12_6: mov eax, 2 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_8: mov eax, 3 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_10: mov eax, 4 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_12: mov eax, 5 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_14: mov eax, 6 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_16: mov eax, 7 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_18: mov eax, 8 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_20: mov eax, 9 mov qword ptr [rsp - 128], rax jmp .LBB12_36 .LBB12_22: mov eax, 10 mov qword ptr [rsp - 128], rax mov rdi, qword ptr [rsp - 120] jmp .LBB12_36 .LBB12_24: mov eax, 11 mov qword ptr [rsp - 128], rax jmp .LBB12_27 .LBB12_26: mov eax, 12 mov qword ptr [rsp - 128], rax .LBB12_27: mov rsi, qword ptr [rsp - 112] mov rdi, qword ptr [rsp - 120] jmp .LBB12_36 .LBB12_30: mov rcx, rbp mov eax, 13 mov qword ptr [rsp - 128], rax jmp .LBB12_35 .LBB12_32: mov rax, rcx mov rcx, rbp mov esi, 14 mov qword ptr [rsp - 128], rsi jmp .LBB12_35 .LBB12_34: mov rax, rcx mov rcx, rbp mov esi, 15 mov qword ptr [rsp - 128], rsi .LBB12_35: mov rsi, qword ptr [rsp - 112] mov rdi, qword ptr [rsp - 120] mov r9, qword ptr [rsp - 40] .p2align 4 .LBB12_36: mov rbp, r13 .LBB12_37: mov r13, qword ptr [rsp - 24] mov qword ptr [rsp + 88], r13 mov r13, qword ptr [rsp - 128] mov qword ptr [rsp + 216], r13 mov r13b, 1 mov dword ptr [rsp - 128], r13d mov qword ptr [rsp - 24], rax mov qword ptr [rsp + 80], rcx mov qword ptr [rsp + 64], rdx mov qword ptr [rsp + 72], rsi mov qword ptr [rsp - 112], rdi mov qword ptr [rsp - 120], r8 mov qword ptr [rsp + 8], r9 mov qword ptr [rsp - 40], r10 mov qword ptr [rsp + 56], r11 mov qword ptr [rsp + 24], rbx mov qword ptr [rsp + 48], r14 mov qword ptr [rsp + 16], r15 mov qword ptr [rsp], rbp mov eax, 0 mov qword ptr [rsp - 16], rax mov qword ptr [rsp - 8], r12 lea r10, [rsp + 208] mov qword ptr [rsp + 40], r10 lea rax, [rsp + 200] mov qword ptr [rsp + 32], rax lea rsi, [rsp + 192] lea rbx, [rsp + 184] lea rcx, [rsp + 176] lea rdx, [rsp + 168] lea r14, [rsp + 160] lea r11, [rsp + 152] lea r9, [rsp + 144] lea r12, [rsp + 136] lea r13, [rsp + 128] lea rbp, [rsp + 120] lea r15, [rsp + 112] lea r8, [rsp + 104] lea rdi, [rsp + 232] .LBB12_39: mov r10, qword ptr [rsp + 96] mov rax, qword ptr [rsp + 40] mov qword ptr [rax], r10 mov rax, qword ptr [rsp + 32] mov r10, qword ptr [rsp] mov qword ptr [rax], r10 mov rax, qword ptr [rsp + 16] mov qword ptr [rsi], rax mov rax, qword ptr [rsp + 48] mov qword ptr [rbx], rax mov rax, qword ptr [rsp + 24] mov qword ptr [rcx], rax mov rax, qword ptr [rsp + 56] mov qword ptr [rdx], rax mov rax, qword ptr [rsp - 40] mov qword ptr [r14], rax mov rax, qword ptr [rsp + 8] mov qword ptr [r11], rax mov rax, qword ptr [rsp - 120] mov qword ptr [r9], rax mov rax, qword ptr [rsp - 112] mov qword ptr [r12], rax mov rax, qword ptr [rsp + 72] mov qword ptr [r13], rax mov rax, qword ptr [rsp + 64] mov qword ptr [rbp], rax mov rax, qword ptr [rsp + 80] mov qword ptr [r15], rax mov rax, qword ptr [rsp - 24] mov qword ptr [r8], rax mov rax, qword ptr [rsp + 88] mov qword ptr [rdi], rax cmp byte ptr [rsp - 128], 0 jne .LBB12_40 mov rax, qword ptr [rsp - 32] mov rcx, qword ptr [rsp - 16] add eax, dword ptr [rcx] mov qword ptr [rsp - 32], rax mov rax, qword ptr [rsp + 216] mov ecx, dword ptr [rsp - 88] add ecx, dword ptr [rax] mov dword ptr [rsp - 88], ecx mov rax, qword ptr [rsp + 208] mov ecx, dword ptr [rsp - 100] add ecx, dword ptr [rax] mov dword ptr [rsp - 100], ecx mov rax, qword ptr [rsp + 200] mov ecx, dword ptr [rsp - 72] add ecx, dword ptr [rax] mov dword ptr [rsp - 72], ecx mov rax, qword ptr [rsp + 192] mov ecx, dword ptr [rsp - 96] add ecx, dword ptr [rax] mov dword ptr [rsp - 96], ecx mov rax, qword ptr [rsp + 184] mov ecx, dword ptr [rsp - 92] add ecx, dword ptr [rax] mov dword ptr [rsp - 92], ecx mov rax, qword ptr [rsp + 176] mov ecx, dword ptr [rsp - 52] add ecx, dword ptr [rax] mov dword ptr [rsp - 52], ecx mov rax, qword ptr [rsp + 168] mov ecx, dword ptr [rsp - 84] add ecx, dword ptr [rax] mov dword ptr [rsp - 84], ecx mov rax, qword ptr [rsp + 160] mov ecx, dword ptr [rsp - 80] add ecx, dword ptr [rax] mov dword ptr [rsp - 80], ecx mov rax, qword ptr [rsp + 152] mov ecx, dword ptr [rsp - 76] add ecx, dword ptr [rax] mov dword ptr [rsp - 76], ecx mov rax, qword ptr [rsp + 144] mov ecx, dword ptr [rsp - 44] add ecx, dword ptr [rax] mov dword ptr [rsp - 44], ecx mov rax, qword ptr [rsp + 136] mov ecx, dword ptr [rsp - 68] add ecx, dword ptr [rax] mov dword ptr [rsp - 68], ecx mov rax, qword ptr [rsp + 128] mov ecx, dword ptr [rsp - 64] add ecx, dword ptr [rax] mov dword ptr [rsp - 64], ecx mov rax, qword ptr [rsp + 120] mov ecx, dword ptr [rsp - 60] add ecx, dword ptr [rax] mov dword ptr [rsp - 60], ecx mov rax, qword ptr [rsp + 112] mov ecx, dword ptr [rsp - 56] add ecx, dword ptr [rax] mov dword ptr [rsp - 56], ecx mov rax, qword ptr [rsp + 104] mov ecx, dword ptr [rsp - 48] add ecx, dword ptr [rax] mov dword ptr [rsp - 48], ecx mov rdi, qword ptr [rsp - 8] mov r12, qword ptr [rsp + 224] cmp rdi, r12 mov qword ptr [rsp + 96], rdi jne .LBB12_3 jmp .LBB12_2 .LBB12_40: mov eax, dword ptr [rsp - 88] add eax, dword ptr [rsp - 32] mov ecx, dword ptr [rsp - 72] add ecx, dword ptr [rsp - 100] add ecx, eax mov edx, dword ptr [rsp - 92] add edx, dword ptr [rsp - 96] mov eax, dword ptr [rsp - 52] add eax, edx add eax, ecx mov ecx, dword ptr [rsp - 80] add ecx, dword ptr [rsp - 84] mov edx, dword ptr [rsp - 76] add edx, ecx mov ecx, dword ptr [rsp - 44] add ecx, edx add ecx, eax mov edx, dword ptr [rsp - 64] add edx, dword ptr [rsp - 68] mov eax, dword ptr [rsp - 60] add eax, edx mov edx, dword ptr [rsp - 56] add edx, eax mov eax, dword ptr [rsp - 48] add eax, edx add eax, ecx add rsp, 240 .cfi_def_cfa_offset 56 pop rbx .cfi_def_cfa_offset 48 pop r12 .cfi_def_cfa_offset 40 pop r13 .cfi_def_cfa_offset 32 pop r14 .cfi_def_cfa_offset 24 pop r15 .cfi_def_cfa_offset 16 pop rbp .cfi_def_cfa_offset 8 ret ``` </details> to ```assembly simd_sum_slow: .cfi_startproc xor eax, eax cmp rsi, 16 jb .LBB12_4 shl rsi, 2 pxor xmm0, xmm0 pxor xmm1, xmm1 pxor xmm3, xmm3 pxor xmm2, xmm2 .p2align 4 .LBB12_2: movdqu xmm4, xmmword ptr [rdi] paddd xmm0, xmm4 movdqu xmm4, xmmword ptr [rdi + 16] paddd xmm1, xmm4 movdqu xmm4, xmmword ptr [rdi + 32] paddd xmm3, xmm4 movdqu xmm4, xmmword ptr [rdi + 48] paddd xmm2, xmm4 add rdi, 64 add rsi, -64 cmp rsi, 60 ja .LBB12_2 paddd xmm0, xmm3 paddd xmm1, xmm2 paddd xmm1, xmm0 pshufd xmm0, xmm1, 238 paddd xmm0, xmm1 pshufd xmm1, xmm0, 85 paddd xmm1, xmm0 movd eax, xmm1 .LBB12_4: ret ```

Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (suggest `br {{.*}}` instead) `// CHECK-NOT: br` is fragile to false positives in mangled symbol names, while `// CHECK-NOT: br {{.*}}` is not. Remove and forbid the former in codegen tests, and suggest the latter. cc rust-lang#149125 (comment) where this caused a CI failure due to a v0 mangled symbol containing `br` in a disambiguator/crate hash/something.

clarify float min/max behavios for NaNs and signed zeros The first comment is internal, it only documents the intrinsics to more clearly say what they do. This makes the currently implemented semantics more explicit, so one does not have to go look for the publicly exposed version of the operation to figure out what exactly should happen. The second commit adds a NaN test to the doc comment for `min`/`max`, which matches what we already have for `minimum`/`maximum`.

…r=Mark-Simulacrum Fix typo and clarify bootstrap change tracker entry mostly: `par` -> `per` but also move some words around and hyphenate to (hopefully) make sentence a bit clearer

Motor OS: make decode_error_kind more comprehensive A minor refactoring of a Tier 3 target (Motor OS).

…=Kobzol bootstrap: Miri now handles jemalloc like everything else rust-lang#149252 made Miri work like clippy here, so I think this comment can be removed?

…0968, r=GuillaumeGomez rustdoc: add regression test for rust-lang#140968 fixes rust-lang#140968

Zalathar · 2025-11-27T01:39:03Z

Rollup of about 2/3 of the queue, to keep failure/perf triage from getting too out of hand.

@bors r+ rollup=never p=5

bors · 2025-11-27T01:39:06Z

📌 Commit 8d6e349 has been approved by Zalathar

It is now in the queue for this repository.

bors · 2025-11-27T04:16:39Z

⌛ Testing commit 8d6e349 with merge a417515...

bors · 2025-11-27T07:29:17Z

☀️ Test successful - checks-actions
Approved by: Zalathar
Pushing a417515 to main...

github-actions · 2025-11-27T07:31:47Z

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 1be6b13 (parent) -> a417515 (this PR)

Test differences

Show 4469 test diffs

Stage 0

errors::verify_passes_abi_invalid_attribute_94: [missing] -> pass (J1)
errors::verify_passes_abi_of_91: pass -> [missing] (J1)
errors::verify_passes_abi_of_92: [missing] -> pass (J1)
errors::verify_passes_attr_application_struct_union_107: [missing] -> pass (J1)
errors::verify_passes_both_ffi_const_and_pure_50: pass -> [missing] (J1)
errors::verify_passes_custom_mir_phase_requires_dialect_139: [missing] -> pass (J1)
errors::verify_passes_deprecated_annotation_has_no_effect_76: [missing] -> pass (J1)
errors::verify_passes_deprecated_attribute_109: pass -> [missing] (J1)
errors::verify_passes_doc_alias_bad_location_20: [missing] -> pass (J1)
errors::verify_passes_doc_alias_malformed_24: [missing] -> pass (J1)
errors::verify_passes_doc_attr_expects_string_3: pass -> [missing] (J1)
errors::verify_passes_doc_auto_cfg_expects_hide_or_show_40: pass -> [missing] (J1)
errors::verify_passes_doc_auto_cfg_wrong_literal_39: pass -> [missing] (J1)
errors::verify_passes_doc_expect_str_16: [missing] -> pass (J1)
errors::verify_passes_doc_inline_conflict_32: [missing] -> pass (J1)
errors::verify_passes_doc_keyword_only_impl_29: pass -> [missing] (J1)
errors::verify_passes_doc_masked_not_extern_crate_self_35: [missing] -> pass (J1)
errors::verify_passes_doc_test_unknown_37: [missing] -> pass (J1)
errors::verify_passes_has_incoherent_inherent_impl_50: [missing] -> pass (J1)
errors::verify_passes_ignored_attr_with_macro_10: pass -> [missing] (J1)
errors::verify_passes_incorrect_target_99: pass -> [missing] (J1)
errors::verify_passes_inline_ignored_for_exported_102: pass -> [missing] (J1)
errors::verify_passes_inline_ignored_for_exported_103: [missing] -> pass (J1)
errors::verify_passes_lang_item_on_incorrect_target_82: pass -> [missing] (J1)
errors::verify_passes_macro_export_on_decl_macro_67: pass -> [missing] (J1)
errors::verify_passes_macro_only_attribute_63: [missing] -> pass (J1)
errors::verify_passes_missing_const_err_121: [missing] -> pass (J1)
errors::verify_passes_missing_lang_item_79: pass -> [missing] (J1)
errors::verify_passes_mixed_export_name_and_no_mangle_9: [missing] -> pass (J1)
errors::verify_passes_no_link_54: [missing] -> pass (J1)
errors::verify_passes_non_exhaustive_with_default_field_values_12: pass -> [missing] (J1)
errors::verify_passes_object_lifetime_err_104: [missing] -> pass (J1)
errors::verify_passes_rustc_legacy_const_generics_index_56: [missing] -> pass (J1)
errors::verify_passes_rustc_legacy_const_generics_only_55: [missing] -> pass (J1)
errors::verify_passes_rustc_lint_opt_ty_72: pass -> [missing] (J1)
errors::verify_passes_should_be_applied_to_fn_12: [missing] -> pass (J1)
errors::verify_passes_should_be_applied_to_static_14: pass -> [missing] (J1)
errors::verify_passes_should_be_applied_to_trait_14: [missing] -> pass (J1)
errors::verify_passes_unexportable_priv_item_134: pass -> [missing] (J1)
errors::verify_passes_unknown_external_lang_item_76: pass -> [missing] (J1)

Stage 1

check_attr::verify_passes_diagnostic_diagnostic_on_const_only_for_trait_impls_1: [missing] -> pass (J0)
errors::verify_passes_abi_of_91: pass -> [missing] (J0)
errors::verify_passes_abi_of_92: [missing] -> pass (J0)
errors::verify_passes_attr_application_struct_105: pass -> [missing] (J0)
errors::verify_passes_cannot_stabilize_deprecated_112: [missing] -> pass (J0)
errors::verify_passes_collapse_debuginfo_74: pass -> [missing] (J0)
errors::verify_passes_collapse_debuginfo_75: [missing] -> pass (J0)
errors::verify_passes_const_stable_not_stable_121: pass -> [missing] (J0)
errors::verify_passes_const_stable_not_stable_122: [missing] -> pass (J0)
errors::verify_passes_custom_mir_phase_requires_dialect_139: [missing] -> pass (J0)
errors::verify_passes_debug_visualizer_unreadable_64: [missing] -> pass (J0)
errors::verify_passes_deprecated_attribute_109: pass -> [missing] (J0)
errors::verify_passes_doc_alias_duplicated_21: pass -> [missing] (J0)
errors::verify_passes_doc_alias_not_an_alias_21: [missing] -> pass (J0)
errors::verify_passes_doc_attr_expects_string_4: [missing] -> pass (J0)
errors::verify_passes_doc_auto_cfg_expects_hide_or_show_40: pass -> [missing] (J0)
errors::verify_passes_doc_keyword_not_keyword_26: [missing] -> pass (J0)
errors::verify_passes_doc_masked_only_extern_crate_33: pass -> [missing] (J0)
errors::verify_passes_doc_test_literal_37: pass -> [missing] (J0)
errors::verify_passes_doc_test_unknown_37: [missing] -> pass (J0)
errors::verify_passes_doc_test_unknown_passes_45: pass -> [missing] (J0)
errors::verify_passes_duplicate_feature_err_119: pass -> [missing] (J0)
errors::verify_passes_inline_ignored_for_exported_102: pass -> [missing] (J0)
errors::verify_passes_inline_ignored_for_exported_103: [missing] -> pass (J0)
errors::verify_passes_lang_item_fn_with_track_caller_80: pass -> [missing] (J0)
errors::verify_passes_lang_item_on_incorrect_target_83: [missing] -> pass (J0)
errors::verify_passes_layout_align_87: [missing] -> pass (J0)
errors::verify_passes_layout_invalid_attribute_91: [missing] -> pass (J0)
errors::verify_passes_layout_of_90: [missing] -> pass (J0)
errors::verify_passes_macro_export_on_decl_macro_67: pass -> [missing] (J0)
errors::verify_passes_missing_stability_attr_113: pass -> [missing] (J0)
errors::verify_passes_no_link_54: [missing] -> pass (J0)
errors::verify_passes_repr_align_greater_than_target_max_61: [missing] -> pass (J0)
errors::verify_passes_rustc_force_inline_coro_66: pass -> [missing] (J0)
errors::verify_passes_rustc_legacy_const_generics_index_55: pass -> [missing] (J0)
errors::verify_passes_rustc_legacy_const_generics_index_negative_58: [missing] -> pass (J0)
errors::verify_passes_rustc_lint_opt_deny_field_access_74: [missing] -> pass (J0)
errors::verify_passes_rustc_lint_opt_ty_73: [missing] -> pass (J0)
errors::verify_passes_transparent_incompatible_108: pass -> [missing] (J0)
errors::verify_passes_unexportable_priv_item_134: pass -> [missing] (J0)
errors::verify_passes_unexportable_type_in_interface_133: pass -> [missing] (J0)
errors::verify_passes_unknown_external_lang_item_76: pass -> [missing] (J0)
errors::verify_passes_unknown_feature_alias_118: [missing] -> pass (J0)
errors::verify_passes_unknown_lang_item_83: pass -> [missing] (J0)
errors::verify_passes_unknown_lang_item_84: [missing] -> pass (J0)
errors::verify_passes_unused_multiple_72: [missing] -> pass (J0)
errors::verify_passes_useless_stability_111: [missing] -> pass (J0)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-32bit-2.rs#all: [missing] -> ignore (ignored when the pointer width is 64bit (64-bit table based SEH has slightly different behaviors than classic SEH)) (J1)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-64bit-2.rs#all: [missing] -> ignore (only executed when the target environment is msvc) (J1)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-64bit-2.rs#strong: [missing] -> ignore (only executed when the target environment is msvc) (J1)

Stage 2

[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-64bit-2.rs#all: [missing] -> pass (J2)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-64bit-2.rs#none: [missing] -> ignore (ignored when the pointer width is 32bit (64-bit table based SEH has slightly different behaviors than classic SEH)) (J3)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-64bit-2.rs#strong: [missing] -> ignore (ignored when the pointer width is 32bit (64-bit table based SEH has slightly different behaviors than classic SEH)) (J3)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-32bit-2.rs#missing: [missing] -> ignore (ignored when the pointer width is 64bit (64-bit table based SEH has slightly different behaviors than classic SEH)) (J4)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-32bit-2.rs#strong: [missing] -> ignore (ignored when the pointer width is 64bit (64-bit table based SEH has slightly different behaviors than classic SEH)) (J4)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-2.rs#all: [missing] -> ignore (ignored when the target vendor is Apple (slightly different policy on stack protection of arrays)) (J5)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-2.rs#missing: [missing] -> ignore (ignored when the target vendor is Apple (slightly different policy on stack protection of arrays)) (J5)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-64bit-2.rs#strong: [missing] -> ignore (only executed when the target environment is msvc) (J6)
[assembly] tests/assembly-llvm/stack-protector/stack-protector-heuristics-effect-windows-32bit-2.rs#all: [missing] -> pass (J7)
num::u128::test_scatter_bits: [missing] -> pass (J8)

(and 544 additional test diffs)

Additionally, 3825 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 a4175159da185130408f71d7aa7e9bff0d455c24 --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

x86_64-rust-for-linux: 2461.1s -> 3045.7s (+23.8%)
dist-x86_64-apple: 8653.2s -> 6748.5s (-22.0%)
x86_64-gnu-tools: 3077.5s -> 3648.2s (+18.5%)
x86_64-gnu-aux: 6224.5s -> 7301.0s (+17.3%)
aarch64-gnu-llvm-20-2: 2156.7s -> 2507.4s (+16.3%)
pr-check-1: 1641.8s -> 1877.6s (+14.4%)
aarch64-apple: 8967.8s -> 7688.9s (-14.3%)
i686-gnu-2: 5536.6s -> 6223.9s (+12.4%)
i686-gnu-nopt-1: 7432.4s -> 8254.3s (+11.1%)
dist-aarch64-apple: 7402.0s -> 6603.1s (-10.8%)

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 · 2025-11-27T07:32:43Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#147115	More robust stack protector testing	`baf4094a159ca6b414412bbbecc4623695eaeb87` (link)
#148048	Stabilize `maybe_uninit_write_slice`	`9e3bfe4b460fc7ac58ce4590324912f81a09d6eb` (link)
#148641	Add a diagnostic attribute for special casing const bound e…	`25c3e0d3f2ae149bbe0d031561b5dde873a6de26` (link)
#149074	Add Command::get_env_clear	`b96906f396db60f263f26e3d9cdd6ee45dbba9a6` (link)
#149097	num: Implement `uint_gather_scatter_bits` feature for unsig…	`050262eb5c40f9d8e550472400533c8dd94ab6f3` (link)
#149131	optimize `slice::Iter::next_chunk`	`4154d9479d61199ae237adebaf75a6e1359df518` (link)
#149190	Forbid `CHECK: br` and `CHECK-NOT: br` in codegen tests (su…	`f13f8776b67d3d9073897560fbecb35e4245eb4b` (link)
#149239	clarify float min/max behavios for NaNs and signed zeros	`cc420e826d3d1e31c47fc36d6a6a50e7ddca2818` (link)
#149243	Fix typo and clarify bootstrap change tracker entry	`fde437a7eaec15979c2a41d5edc0bc3afe3471a2` (link)
#149301	Motor OS: make decode_error_kind more comprehensive	`f741c406dc01faf4dc05000eddd5083e0d65f4b5` (link)
#149306	bootstrap: Miri now handles jemalloc like everything else	`dab3a83742f043671b68d223b6fa4df12db14fe5` (link)
#149325	rustdoc: add regression test for #140968	`4b106a7f2127a5dcc48d5c90d1ba60107f7aab36` (link)

previous master: 1be6b13be7

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-timer · 2025-11-27T08:49:07Z

Finished benchmarking commit (a417515): 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)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.2%	[-0.2%, -0.2%]	1
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary 0.7%)

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

	mean	range	count
Regressions ❌ (primary)	0.7%	[0.7%, 0.7%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.7%	[0.7%, 0.7%]	1

Cycles

Results (primary 2.8%, secondary 2.6%)

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

	mean	range	count
Regressions ❌ (primary)	2.8%	[2.4%, 3.3%]	2
Regressions ❌ (secondary)	2.6%	[2.6%, 2.6%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.8%	[2.4%, 3.3%]	2

Binary size

Results (primary 0.0%, secondary 0.0%)

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

	mean	range	count
Regressions ❌ (primary)	0.0%	[0.0%, 0.0%]	4
Regressions ❌ (secondary)	0.0%	[0.0%, 0.0%]	34
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.0%	[0.0%, 0.0%]	4

Bootstrap: 468.01s -> 472.621s (0.99%)
Artifact size: 386.86 MiB -> 386.88 MiB (0.00%)

thaliaarchi and others added 27 commits October 23, 2025 14:02

Stabilize maybe_uninit_write_slice

5088b38

Add Command::get_env_clear

b6a6f00

This addition allows an end-user to inspect whether the env clear value is set on a `Command` instance or not. Discussed in: - rust-lang#149070 - rust-lang/libs-team#194

Resolve to a concrete impl instead of using fuzzy search

1223f5c

Replace uses of 'CHECK: br' and 'CHECK-NOT: br' with 'br {{.*}}'.

9a8dc7e

v0 mangling can produce symbols with 'br' as a substring, leading to false positives for CHECK-NOT

Add tidy check to forbid 'CHECK: br' and 'CHECK-NOT: br' in new codeg…

238ef54

…en tests

Fix typo and clarify bootstrap change tracker entry

b5164c0

mostly: `par` -> `per` but also move some words around and hyphenate to (hopefully) make sentence a bit clearer

intrinsics: clarify float min/max behavios for NaNs and signed zeros

8b87b25

add NaN examples to public min/max functions

15290fa

num: Implement uint_gather_scatter_bits feature for unsigned integers

7f89192

Implement `gather_bits`, `scatter_bits` functions on unsigned integers Add tests to coretests

Motor OS: make decode_error_kind more comprehensive

e1a805a

rustdoc: add regression test for rust-lang#140968

9352610

Add a diagnostic attribute for special casing const bound errors for …

9218298

…non-const impls

bootstrap: Miri now handles jemalloc like everything else

3a91d34

Add 'stack-protector' tests for Linux/Win32/Win64.

be28e7f

optimize slice::Iter::next_chunk

9a48fb6

Rollup merge of rust-lang#149243 - yotamofek:pr/change_tracker_typo, …

5432029

…r=Mark-Simulacrum Fix typo and clarify bootstrap change tracker entry mostly: `par` -> `per` but also move some words around and hyphenate to (hopefully) make sentence a bit clearer

Rollup merge of rust-lang#149301 - moturus:main, r=Mark-Simulacrum

0dae3e0

Motor OS: make decode_error_kind more comprehensive A minor refactoring of a Tier 3 target (Motor OS).

Rollup merge of rust-lang#149306 - RalfJung:bootstra-miri-jemalloc, r…

a545fa3

…=Kobzol bootstrap: Miri now handles jemalloc like everything else rust-lang#149252 made Miri work like clippy here, so I think this comment can be removed?

Rollup merge of rust-lang#149325 - lolbinarycat:rustdoc-alias-sort-14…

8d6e349

…0968, r=GuillaumeGomez rustdoc: add regression test for rust-lang#140968 fixes rust-lang#140968

rustbot added A-attributes Area: Attributes (`#[…]`, `#![…]`) A-rustdoc-search Area: Rustdoc's search feature A-tidy Area: The tidy tool labels Nov 27, 2025

bors 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 Nov 27, 2025

Zalathar mentioned this pull request Nov 27, 2025

Rollup of 8 pull requests #149370

Merged

bors added the merged-by-bors This PR was explicitly merged by bors. label Nov 27, 2025

bors merged commit a417515 into rust-lang:main Nov 27, 2025
12 checks passed

rustbot added this to the 1.93.0 milestone Nov 27, 2025

Zalathar deleted the rollup-dakpdsl branch November 27, 2025 07:46

This was referenced Nov 27, 2025

Move even more early buffered lints to dyn lint diagnostics #147634

Open

reland and fix RUST-147622 #148438

Open

This was referenced Nov 27, 2025

stabilize maybe_uninit_slice #149102

Open

Add Command::get_resolved_envs #149362

Open

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

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