Merge ref '8401398e1f14' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: 8401398
Filtered ref: 52a911b7100ca6a6ed84159c51ce514a98ae9cf5
Upstream diff: c5dabe8...8401398

This merge was created using https://github.com/rust-lang/josh-sync.

Author: The rustc-josh-sync Cronjob Bot

.mailmap

@@ -9,7 +9,7 @@ Aaron Todd <github@opprobrio.us>
 Abhishek Chanda <abhishek.becs@gmail.com> Abhishek Chanda <abhishek@cloudscaling.com>
 Abhijeet Bhagat <abhijeet.bhagat@gmx.com>
 Abroskin Alexander <arkweid@evilmartians.com>
-Adolfo Ochagavía <aochagavia92@gmail.com>
+Adolfo Ochagavía <aochagavia92@gmail.com> <github@adolfo.ochagavia.xyz>
 Adrian Heine né Lang <mail@adrianheine.de>
 Adrien Tétar <adri-from-59@hotmail.fr>
 Ahmed Charles <ahmedcharles@gmail.com> <acharles@outlook.com>
@@ -36,6 +36,7 @@ Amanda Stjerna <mail@amandastjerna.se> <albin.stjerna@gmail.com>
 Amanda Stjerna <mail@amandastjerna.se> <amanda.stjerna@it.uu.se>
 Amanieu d'Antras <amanieu@gmail.com> <amanieu.dantras@huawei.com>
 Amos Onn <amosonn@gmail.com>
+Amos Wenger <amoswenger@gmail.com> <fasterthanlime@users.noreply.github.com>
 Ana-Maria Mihalache <mihalacheana.maria@yahoo.com>
 Anatoly Ikorsky <aikorsky@gmail.com>
 Andre Bogus <bogusandre@gmail.com>
@@ -138,7 +139,6 @@ Christian Poveda <git@pvdrz.com> <31802960+christianpoveda@users.noreply.github.
 Christian Poveda <git@pvdrz.com> <christianpoveda@uhura.edef.eu>
 Christian Vallentin <vallentinsource@gmail.com>
 Christoffer Buchholz <chris@chrisbuchholz.me>
-Christopher Durham <cad97@cad97.com>
 Clark Gaebel <cg.wowus.cg@gmail.com> <cgaebel@mozilla.com>
 Clement Miao <clementmiao@gmail.com>
 Clément Renault <renault.cle@gmail.com>
@@ -147,6 +147,7 @@ Clinton Ryan <clint.ryan3@gmail.com>
 Taylor Cramer <cramertaylorj@gmail.com> <cramertj@google.com>
 ember arlynx <ember@lunar.town> <corey@octayn.net>
 Crazycolorz5 <Crazycolorz5@gmail.com>
+Crystal Durham <cad97@cad97.com>
 csmoe <35686186+csmoe@users.noreply.github.com>
 Cyryl Płotnicki <cyplo@cyplo.net>
 Damien Schoof <damien.schoof@gmail.com>
@@ -276,7 +277,8 @@ Irina Popa <irinagpopa@gmail.com>
 Ivan Ivaschenko <defuz.net@gmail.com>
 ivan tkachenko <me@ratijas.tk>
 J. J. Weber <jjweber@gmail.com>
-Jack Huey <jack.huey@umassmed.edu> <jackh726@gmail.com>
+Jack Huey <jackh726@gmail.com> <jack.huey@umassmed.edu>
+Jack Huey <jackh726@gmail.com> <31162821+jackh726@users.noreply.github.com>
 Jacob <jacob.macritchie@gmail.com>
 Jacob Hoffman-Andrews <rust@hoffman-andrews.com> <github@hoffman-andrews.com>
 Jacob Greenfield <xales@naveria.com>
@@ -292,6 +294,8 @@ Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com>
 Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <jakub.bukaj@yahoo.com>
 Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <jakub@jakub.cc>
 Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <jakubw@jakubw.net>
+Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <ja.wieczorek@student.uw.edu.pl>
+Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <software@jacobadam.net>
 Jakub Beránek <berykubik@gmail.com> <jakub.beranek@vsb.cz>
 James [Undefined] <tpzker@thepuzzlemaker.info>
 James Deng <cnjamesdeng@gmail.com> <cnJamesDeng@gmail.com>
@@ -303,6 +307,7 @@ Jamie Hill-Daniel <jamie@hill-daniel.co.uk> <clubby789@gmail.com>
 Jana Dönszelmann <jana@donsz.nl>
 Jana Dönszelmann <jana@donsz.nl> <jonathan@donsz.nl>
 Jana Dönszelmann <jana@donsz.nl> <jonabent@gmail.com>
+Jane Lusby <jlusby42@gmail.com> <jlusby@yaah.dev>
 Jan-Erik Rediger <janerik@fnordig.de> <badboy@archlinux.us>
 Jaro Fietz <jaro.fietz@gmx.de>
 Jason Fager <jfager@gmail.com>
@@ -313,6 +318,7 @@ Jason Toffaletti <toffaletti@gmail.com> Jason Toffaletti <jason@topsy.com>
 Jauhien Piatlicki <jauhien@gentoo.org> Jauhien Piatlicki <jpiatlicki@zertisa.com>
 Jay True <glacjay@gmail.com>
 Jeremy Letang <letang.jeremy@gmail.com>
+Jeremy Soller <jackpot51@gmail.com> <jeremy@system76.com>
 Jeremy Sorensen <jeremy.a.sorensen@gmail.com>
 Jeremy Stucki <dev@jeremystucki.ch> <stucki.jeremy@gmail.com>
 Jeremy Stucki <dev@jeremystucki.ch> <jeremy@myelin.ch>
@@ -336,6 +342,7 @@ John Kåre Alsaker <john.kare.alsaker@gmail.com>
 John Kåre Alsaker <john.kare.alsaker@gmail.com> <zoxc32@gmail.com>
 John Talling <inrustwetrust@users.noreply.github.com>
 John Van Enk <vanenkj@gmail.com>
+Jon Gjengset <jon@thesquareplanet.com> <jongje@amazon.com>
 Jonas Tepe <jonasprogrammer@gmail.com>
 Jonathan Bailey <jbailey@mozilla.com> <jbailey@jbailey-20809.local>
 Jonathan Chan Kwan Yin <sofe2038@gmail.com>
@@ -424,7 +431,7 @@ Malo Jaffré <jaffre.malo@gmail.com>
 Manish Goregaokar <manishsmail@gmail.com>
 Mara Bos <m-ou.se@m-ou.se>
 Marcell Pardavi <marcell.pardavi@gmail.com>
-Marco Ieni <11428655+MarcoIeni@users.noreply.github.com>
+Marco Ieni <marcoieni@rustfoundation.org> <11428655+MarcoIeni@users.noreply.github.com>
 Marcus Klaas de Vries <mail@marcusklaas.nl>
 Margaret Meyerhofer <mmeyerho@andrew.cmu.edu> <mmeyerho@andrew>
 Marijn Schouten <mhkbst@gmail.com> <hkBst@users.noreply.github.com>
@@ -531,6 +538,7 @@ Oliver Scherer <oli-obk@users.noreply.github.com> <oliver.schneider@kit.edu>
 Oliver Scherer <oli-obk@users.noreply.github.com> <obk8176014uqher834@olio-obk.de>
 Oliver Scherer <oli-obk@users.noreply.github.com> <rustc-contact@oli-obk.de>
 Oliver Scherer <oli-obk@users.noreply.github.com>
+Onur Özkan <onurozkan.dev@outlook.com> <contact@onurozkan.dev>
 Onur Özkan <onurozkan.dev@outlook.com> <work@onurozkan.dev>
 Onur Özkan <onurozkan.dev@outlook.com>
 Ömer Sinan Ağacan <omeragacan@gmail.com>
@@ -591,6 +599,7 @@ Rusty Blitzerr <rusty.blitzerr@gmail.com>
 RustyYato <krishna.sd.2012@gmail.com>
 Ruud van Asseldonk <dev@veniogames.com> Ruud van Asseldonk <ruuda@google.com>
 Ryan Leung <rleungx@gmail.com>
+Ryan Levick <me@ryanlevick.com> <rylev@users.noreply.github.com>
 Ryan Scheel <ryan.havvy@gmail.com>
 Ryan Sullivant <rsulli55@gmail.com>
 Ryan Wiedemann <Ryan1729@gmail.com>
@@ -686,6 +695,8 @@ Weihang Lo <me@weihanglo.tw>
 Weihang Lo <me@weihanglo.tw> <weihanglo@users.noreply.github.com>
 Wesley Wiser <wwiser@gmail.com> <wesleywiser@microsoft.com>
 whitequark <whitequark@whitequark.org>
+Will Crichton <crichton.will@gmail.com> <wcrichto@stanford.edu>
+Will Crichton <crichton.will@gmail.com> <wcrichto@cs.stanford.edu>
 William Ting <io@williamting.com> <william.h.ting@gmail.com>
 Wim Looman <wim@nemo157.com> <rust-lang@nemo157.com>
 Wim Looman <wim@nemo157.com> <git@nemo157.com>
@@ -695,6 +706,8 @@ Xinye Tao <xy.tao@outlook.com>
 Xuefeng Wu <benewu@gmail.com> Xuefeng Wu <xfwu@thoughtworks.com>
 Xuefeng Wu <benewu@gmail.com> XuefengWu <benewu@gmail.com>
 York Xiang <bombless@126.com>
+Yoshua Wuyts <yoshuawuyts@gmail.com> <yoshuawuyts+github@gmail.com>
+Yoshua Wuyts <yoshuawuyts@gmail.com> <2467194+yoshuawuyts@users.noreply.github.com>
 Yotam Ofek <yotam.ofek@gmail.com> <yotamofek@microsoft.com>
 Youngsoo Son <ysson83@gmail.com> <ysoo.son@samsung.com>
 Youngsuk Kim <joseph942010@gmail.com>

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.7"
+version = "0.12.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47224528f74de27d1d06aad6a5dda4f865b6ebe2e56c538943d746a7270cb67e"
+checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
 dependencies = [
  "anstyle",
  "unicode-width 0.2.2",
@@ -2334,9 +2334,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.7.5"
+version = "2.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
+checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
 
 [[package]]
 name = "memmap2"
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
- "annotate-snippets 0.12.7",
+ "annotate-snippets 0.12.8",
  "anstream",
  "anstyle",
  "derive_setters",

RELEASES.md

@@ -1,3 +1,11 @@
+Version 1.91.1 (2025-11-10)
+===========================
+
+<a id="1.91.1"></a>
+
+- [Enable file locking support in illumos](https://github.com/rust-lang/rust/pull/148322). This fixes Cargo not locking the build directory on illumos.
+- [Fix `wasm_import_module` attribute cross-crate](https://github.com/rust-lang/rust/pull/148363). This fixes linker errors on WASM targets.
+
 Version 1.91.0 (2025-10-30)
 ==========================
 

compiler/rustc_abi/src/canon_abi.rs

@@ -51,6 +51,20 @@ pub enum CanonAbi {
     X86(X86Call),
 }
 
+impl CanonAbi {
+    pub fn is_rustic_abi(self) -> bool {
+        match self {
+            CanonAbi::Rust | CanonAbi::RustCold => true,
+            CanonAbi::C
+            | CanonAbi::Custom
+            | CanonAbi::Arm(_)
+            | CanonAbi::GpuKernel
+            | CanonAbi::Interrupt(_)
+            | CanonAbi::X86(_) => false,
+        }
+    }
+}
+
 impl fmt::Display for CanonAbi {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // convert to the ExternAbi that *shares a string* with this CanonAbi.

compiler/rustc_abi/src/layout.rs

@@ -812,7 +812,7 @@ impl<Cx: HasDataLayout> LayoutCalculator<Cx> {
         let (max, min) = largest_niche
             // We might have no inhabited variants, so pretend there's at least one.
             .unwrap_or((0, 0));
-        let (min_ity, signed) = discr_range_of_repr(min, max); //Integer::repr_discr(tcx, ty, &repr, min, max);
+        let (min_ity, signed) = discr_range_of_repr(min, max); //Integer::discr_range_of_repr(tcx, ty, &repr, min, max);
 
         let mut align = dl.aggregate_align;
         let mut max_repr_align = repr.align;

compiler/rustc_abi/src/layout/ty.rs

@@ -172,6 +172,8 @@ pub trait TyAbiInterface<'a, C>: Sized + std::fmt::Debug {
     fn is_tuple(this: TyAndLayout<'a, Self>) -> bool;
     fn is_unit(this: TyAndLayout<'a, Self>) -> bool;
     fn is_transparent(this: TyAndLayout<'a, Self>) -> bool;
+    /// See [`TyAndLayout::pass_indirectly_in_non_rustic_abis`] for details.
+    fn is_pass_indirectly_in_non_rustic_abis_flag_set(this: TyAndLayout<'a, Self>) -> bool;
 }
 
 impl<'a, Ty> TyAndLayout<'a, Ty> {
@@ -269,6 +271,30 @@ impl<'a, Ty> TyAndLayout<'a, Ty> {
         Ty::is_transparent(self)
     }
 
+    /// If this method returns `true`, then this type should always have a `PassMode` of
+    /// `Indirect { on_stack: false, .. }` when being used as the argument type of a function with a
+    /// non-Rustic ABI (this is true for structs annotated with the
+    /// `#[rustc_pass_indirectly_in_non_rustic_abis]` attribute).
+    ///
+    /// This is used to replicate some of the behaviour of C array-to-pointer decay; however unlike
+    /// C any changes the caller makes to the passed value will not be reflected in the callee, so
+    /// the attribute is only useful for types where observing the value in the caller after the
+    /// function call isn't allowed (a.k.a. `va_list`).
+    ///
+    /// This function handles transparent types automatically.
+    pub fn pass_indirectly_in_non_rustic_abis<C>(mut self, cx: &C) -> bool
+    where
+        Ty: TyAbiInterface<'a, C> + Copy,
+    {
+        while self.is_transparent()
+            && let Some((_, field)) = self.non_1zst_field(cx)
+        {
+            self = field;
+        }
+
+        Ty::is_pass_indirectly_in_non_rustic_abis_flag_set(self)
+    }
+
     /// Finds the one field that is not a 1-ZST.
     /// Returns `None` if there are multiple non-1-ZST fields or only 1-ZST-fields.
     pub fn non_1zst_field<C>(&self, cx: &C) -> Option<(FieldIdx, Self)>

compiler/rustc_abi/src/lib.rs

@@ -1,9 +1,7 @@
 // tidy-alphabetical-start
 #![cfg_attr(feature = "nightly", allow(internal_features))]
-#![cfg_attr(feature = "nightly", doc(rust_logo))]
 #![cfg_attr(feature = "nightly", feature(assert_matches))]
 #![cfg_attr(feature = "nightly", feature(rustc_attrs))]
-#![cfg_attr(feature = "nightly", feature(rustdoc_internals))]
 #![cfg_attr(feature = "nightly", feature(step_trait))]
 // tidy-alphabetical-end
 
@@ -88,14 +86,17 @@ bitflags! {
         const IS_C               = 1 << 0;
         const IS_SIMD            = 1 << 1;
         const IS_TRANSPARENT     = 1 << 2;
-        // Internal only for now. If true, don't reorder fields.
-        // On its own it does not prevent ABI optimizations.
+        /// Internal only for now. If true, don't reorder fields.
+        /// On its own it does not prevent ABI optimizations.
         const IS_LINEAR          = 1 << 3;
-        // If true, the type's crate has opted into layout randomization.
-        // Other flags can still inhibit reordering and thus randomization.
-        // The seed stored in `ReprOptions.field_shuffle_seed`.
+        /// If true, the type's crate has opted into layout randomization.
+        /// Other flags can still inhibit reordering and thus randomization.
+        /// The seed stored in `ReprOptions.field_shuffle_seed`.
         const RANDOMIZE_LAYOUT   = 1 << 4;
-        // Any of these flags being set prevent field reordering optimisation.
+        /// If true, the type is always passed indirectly by non-Rustic ABIs.
+        /// See [`TyAndLayout::pass_indirectly_in_non_rustic_abis`] for details.
+        const PASS_INDIRECTLY_IN_NON_RUSTIC_ABIS = 1 << 5;
+        /// Any of these flags being set prevent field reordering optimisation.
         const FIELD_ORDER_UNOPTIMIZABLE   = ReprFlags::IS_C.bits()
                                  | ReprFlags::IS_SIMD.bits()
                                  | ReprFlags::IS_LINEAR.bits();
@@ -183,6 +184,11 @@ impl ReprOptions {
 
     /// Returns the discriminant type, given these `repr` options.
     /// This must only be called on enums!
+    ///
+    /// This is the "typeck type" of the discriminant, which is effectively the maximum size:
+    /// discriminant values will be wrapped to fit (with a lint). Layout can later decide to use a
+    /// smaller type for the tag that stores the discriminant at runtime and that will work just
+    /// fine, it just induces casts when getting/setting the discriminant.
     pub fn discr_type(&self) -> IntegerType {
         self.int.unwrap_or(IntegerType::Pointer(true))
     }

compiler/rustc_arena/src/lib.rs

@@ -12,18 +12,13 @@
 #![allow(internal_features)]
 #![cfg_attr(test, feature(test))]
 #![deny(unsafe_op_in_unsafe_fn)]
-#![doc(
-    html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/",
-    test(no_crate_inject, attr(deny(warnings)))
-)]
-#![doc(rust_logo)]
+#![doc(test(no_crate_inject, attr(deny(warnings), allow(internal_features))))]
 #![feature(core_intrinsics)]
 #![feature(decl_macro)]
 #![feature(dropck_eyepatch)]
 #![feature(maybe_uninit_slice)]
 #![feature(never_type)]
 #![feature(rustc_attrs)]
-#![feature(rustdoc_internals)]
 #![feature(unwrap_infallible)]
 // tidy-alphabetical-end
 

compiler/rustc_ast/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 bitflags = "2.4.1"
-memchr = "2.7.4"
+memchr = "2.7.6"
 rustc-literal-escaper = "0.0.5"
 rustc_ast_ir = { path = "../rustc_ast_ir" }
 rustc_data_structures = { path = "../rustc_data_structures" }

compiler/rustc_ast/src/ast.rs

@@ -714,6 +714,15 @@ impl Pat {
         }
     }
 
+    /// Strip off all reference patterns (`&`, `&mut`) and return the inner pattern.
+    pub fn peel_refs(&self) -> &Pat {
+        let mut current = self;
+        while let PatKind::Ref(inner, _) = &current.kind {
+            current = inner;
+        }
+        current
+    }
+
     /// Is this a `..` pattern?
     pub fn is_rest(&self) -> bool {
         matches!(self.kind, PatKind::Rest)
@@ -3759,10 +3768,29 @@ pub struct ConstItem {
     pub ident: Ident,
     pub generics: Generics,
     pub ty: Box<Ty>,
-    pub expr: Option<Box<Expr>>,
+    pub rhs: Option<ConstItemRhs>,
     pub define_opaque: Option<ThinVec<(NodeId, Path)>>,
 }
 
+#[derive(Clone, Encodable, Decodable, Debug, Walkable)]
+pub enum ConstItemRhs {
+    TypeConst(AnonConst),
+    Body(Box<Expr>),
+}
+
+impl ConstItemRhs {
+    pub fn span(&self) -> Span {
+        self.expr().span
+    }
+
+    pub fn expr(&self) -> &Expr {
+        match self {
+            ConstItemRhs::TypeConst(anon_const) => &anon_const.value,
+            ConstItemRhs::Body(expr) => expr,
+        }
+    }
+}
+
 // Adding a new variant? Please update `test_item` in `tests/ui/macros/stringify.rs`.
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub enum ItemKind {