Auto merge of rust-lang#3844 - rust-lang:rustup-2024-08-26, r=RalfJung

Automatic Rustup

Author: bors

.github/workflows/dependencies.yml

@@ -64,6 +64,10 @@ jobs:
       - name: cargo update
         # Remove first line that always just says "Updating crates.io index"
         run: cargo update 2>&1 | sed '/crates.io index/d' | tee -a cargo_update.log
+      - name: cargo update library
+        run: |
+          echo -e "\nlibrary dependencies:" >> cargo_update.log
+          cargo update --manifest-path library/Cargo.toml 2>&1 | sed '/crates.io index/d' | tee -a cargo_update.log
       - name: cargo update rustbook
         run: |
           echo -e "\nrustbook dependencies:" >> cargo_update.log
@@ -74,6 +78,7 @@ jobs:
           name: Cargo-lock
           path: |
             Cargo.lock
+            library/Cargo.lock
             src/tools/rustbook/Cargo.lock
           retention-days: 1
       - name: upload cargo-update log artifact for use in PR
@@ -119,7 +124,7 @@ jobs:
           git config user.name github-actions
           git config user.email [email protected]
           git switch --force-create cargo_update
-          git add ./Cargo.lock ./src/tools/rustbook/Cargo.lock
+          git add ./Cargo.lock ./library/Cargo.lock ./src/tools/rustbook/Cargo.lock
           git commit --no-verify --file=commit.txt
 
       - name: push

.gitignore

@@ -56,7 +56,9 @@ build/
 /src/tools/x/target
 # Created by default with `src/ci/docker/run.sh`
 /obj/
-/rustc-ice*
+
+## ICE reports
+rustc-ice-*.txt
 
 ## Temporary files
 *~

Cargo.lock

@@ -94,16 +94,6 @@ dependencies = [
  "yansi-term",
 ]
 
-[[package]]
-name = "annotate-snippets"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d9b665789884a7e8fb06c84b295e923b03ca51edbb7d08f91a6a50322ecbfe6"
-dependencies = [
- "anstyle",
- "unicode-width",
-]
-
 [[package]]
 name = "annotate-snippets"
 version = "0.11.4"
@@ -205,9 +195,9 @@ dependencies = [
 
 [[package]]
 name = "ar_archive_writer"
-version = "0.4.0"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de11a9d32db3327f981143bdf699ade4d637c6887b13b97e6e91a9154666963c"
+checksum = "01667f6f40216b9a0b2945e05fed5f1ad0ab6470e69cb9378001e37b1c0668e4"
 dependencies = [
  "object 0.36.3",
 ]
@@ -420,12 +410,9 @@ version = "0.1.0"
 
 [[package]]
 name = "cc"
-version = "1.1.13"
+version = "1.0.105"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72db2f7947ecee9b03b510377e8bb9077afa27176fdbff55c51027e976fdcc48"
-dependencies = [
- "shlex",
-]
+checksum = "5208975e568d83b6b05cc0a063c8e7e9acc2b43bee6da15616a5b73e109d7437"
 
 [[package]]
 name = "cfg-if"
@@ -549,6 +536,7 @@ name = "clippy"
 version = "0.1.82"
 dependencies = [
  "anstream",
+ "cargo_metadata 0.18.1",
  "clippy_config",
  "clippy_lints",
  "clippy_utils",
@@ -562,6 +550,7 @@ dependencies = [
  "regex",
  "rustc_tools_util",
  "serde",
+ "serde_json",
  "syn 2.0.75",
  "tempfile",
  "termize",
@@ -576,7 +565,6 @@ name = "clippy_config"
 version = "0.1.82"
 dependencies = [
  "itertools",
- "rustc-semver",
  "serde",
  "toml 0.7.8",
  "walkdir",
@@ -608,7 +596,6 @@ dependencies = [
  "quine-mc_cluskey",
  "regex",
  "regex-syntax 0.8.4",
- "rustc-semver",
  "semver",
  "serde",
  "serde_json",
@@ -627,7 +614,6 @@ dependencies = [
  "arrayvec",
  "clippy_config",
  "itertools",
- "rustc-semver",
  "rustc_apfloat",
 ]
 
@@ -2240,9 +2226,12 @@ dependencies = [
 
 [[package]]
 name = "minifier"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95bbbf96b9ac3482c2a25450b67a15ed851319bc5fabf3b40742ea9066e84282"
+checksum = "9aa3f302fe0f8de065d4a2d1ed64f60204623cac58b80cd3c2a83a25d5a7d437"
+dependencies = [
+ "clap",
+]
 
 [[package]]
 name = "minimal-lexical"
@@ -3139,6 +3128,7 @@ dependencies = [
  "bstr",
  "build_helper",
  "gimli 0.31.0",
+ "libc",
  "object 0.36.3",
  "regex",
  "serde_json",
@@ -3211,12 +3201,6 @@ dependencies = [
  "num_cpus",
 ]
 
-[[package]]
-name = "rustc-semver"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5be1bdc7edf596692617627bbfeaba522131b18e06ca4df2b6b689e3c5d5ce84"
-
 [[package]]
 name = "rustc-stable-hash"
 version = "0.1.0"
@@ -3642,7 +3626,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
- "annotate-snippets 0.10.2",
+ "annotate-snippets 0.11.4",
  "derive_setters",
  "rustc_ast",
  "rustc_ast_pretty",
@@ -3702,7 +3686,7 @@ dependencies = [
 name = "rustc_fluent_macro"
 version = "0.0.0"
 dependencies = [
- "annotate-snippets 0.10.2",
+ "annotate-snippets 0.11.4",
  "fluent-bundle",
  "fluent-syntax",
  "proc-macro2",
@@ -4552,6 +4536,7 @@ dependencies = [
  "bitflags 2.6.0",
  "derive-where",
  "indexmap",
+ "rustc-hash",
  "rustc_ast_ir",
  "rustc_data_structures",
  "rustc_index",

RELEASES.md

@@ -143,6 +143,8 @@ Compatibility Notes
 - [Turn `proc_macro_back_compat` lint into a hard error.](https://github.com/rust-lang/rust/pull/125596/)
 - [Detect unused structs even when implementing private traits](https://github.com/rust-lang/rust/pull/122382/)
 - [`std::sync::ReentrantLockGuard<T>` is no longer `Sync` if `T: !Sync`](https://github.com/rust-lang/rust/pull/125527) which means [`std::io::StdoutLock` and `std::io::StderrLock` are no longer Sync](https://github.com/rust-lang/rust/issues/127340)
+- [Type inference will fail in some cases due to new implementations of `FromIterator for Box<str>`.](https://github.com/rust-lang/rust/pull/99969/)
+  Notably, this breaks versions of the `time` crate before 0.3.35, due to no longer inferring the implementation for `Box<[_]>`.
 
 <a id="1.80-Internal-Changes"></a>
 

compiler/rustc_ast/src/ast.rs

@@ -2902,6 +2902,17 @@ pub struct AttrItem {
     pub tokens: Option<LazyAttrTokenStream>,
 }
 
+impl AttrItem {
+    pub fn is_valid_for_outer_style(&self) -> bool {
+        self.path == sym::cfg_attr
+            || self.path == sym::cfg
+            || self.path == sym::forbid
+            || self.path == sym::warn
+            || self.path == sym::allow
+            || self.path == sym::deny
+    }
+}
+
 /// `TraitRef`s appear in impls.
 ///
 /// Resolution maps each `TraitRef`'s `ref_id` to its defining trait; that's all

compiler/rustc_ast_lowering/src/asm.rs

@@ -86,9 +86,8 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                                 // Multiple different abi names may actually be the same ABI
                                 // If the specified ABIs are not the same name, alert the user that they resolve to the same ABI
                                 let source_map = self.tcx.sess.source_map();
-                                let equivalent = (source_map.span_to_snippet(*prev_sp)
-                                    != source_map.span_to_snippet(*abi_span))
-                                .then_some(());
+                                let equivalent = source_map.span_to_snippet(*prev_sp)
+                                    != source_map.span_to_snippet(*abi_span);
 
                                 self.dcx().emit_err(AbiSpecifiedMultipleTimes {
                                     abi_span: *abi_span,
@@ -221,7 +220,9 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                             let parent_def_id = self.current_def_id_parent;
                             let node_id = self.next_node_id();
                             // HACK(min_generic_const_args): see lower_anon_const
-                            if !expr.is_potential_trivial_const_arg() {
+                            if !self.tcx.features().const_arg_path
+                                || !expr.is_potential_trivial_const_arg()
+                            {
                                 self.create_def(
                                     parent_def_id,
                                     node_id,

compiler/rustc_ast_lowering/src/errors.rs

@@ -184,7 +184,7 @@ pub struct AbiSpecifiedMultipleTimes {
     #[label]
     pub prev_span: Span,
     #[note]
-    pub equivalent: Option<()>,
+    pub equivalent: bool,
 }
 
 #[derive(Diagnostic)]

compiler/rustc_ast_lowering/src/expr.rs

@@ -387,7 +387,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 let node_id = self.next_node_id();
 
                 // HACK(min_generic_const_args): see lower_anon_const
-                if !arg.is_potential_trivial_const_arg() {
+                if !self.tcx.features().const_arg_path || !arg.is_potential_trivial_const_arg() {
                     // Add a definition for the in-band const def.
                     self.create_def(parent_def_id, node_id, kw::Empty, DefKind::AnonConst, f.span);
                 }

compiler/rustc_ast_lowering/src/item.rs

@@ -1421,7 +1421,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
         };
         hir::FnHeader {
             safety: self.lower_safety(h.safety, default_safety),
-            asyncness: asyncness,
+            asyncness,
             constness: self.lower_constness(h.constness),
             abi: self.lower_extern(h.ext),
         }

compiler/rustc_ast_lowering/src/lib.rs

@@ -2358,7 +2358,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         span: Span,
     ) -> &'hir hir::ConstArg<'hir> {
         let ct_kind = match res {
-            Res::Def(DefKind::ConstParam, _) => {
+            Res::Def(DefKind::ConstParam, _) if self.tcx.features().const_arg_path => {
                 let qpath = self.lower_qpath(
                     ty_id,
                     &None,
@@ -2433,7 +2433,8 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             self.resolver.get_partial_res(expr.id).and_then(|partial_res| partial_res.full_res());
         debug!("res={:?}", maybe_res);
         // FIXME(min_generic_const_args): for now we only lower params to ConstArgKind::Path
-        if let Some(res) = maybe_res
+        if self.tcx.features().const_arg_path
+            && let Some(res) = maybe_res
             && let Res::Def(DefKind::ConstParam, _) = res
             && let ExprKind::Path(qself, path) = &expr.kind
         {
@@ -2464,7 +2465,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
     /// See [`hir::ConstArg`] for when to use this function vs
     /// [`Self::lower_anon_const_to_const_arg`].
     fn lower_anon_const_to_anon_const(&mut self, c: &AnonConst) -> &'hir hir::AnonConst {
-        if c.value.is_potential_trivial_const_arg() {
+        if self.tcx.features().const_arg_path && c.value.is_potential_trivial_const_arg() {
             // HACK(min_generic_const_args): see DefCollector::visit_anon_const
             // Over there, we guess if this is a bare param and only create a def if
             // we think it's not. However we may can guess wrong (see there for example)

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -562,10 +562,8 @@ impl<'a> AstValidator<'a> {
         FnHeader { safety: _, coroutine_kind, constness, ext }: FnHeader,
     ) {
         let report_err = |span| {
-            self.dcx().emit_err(errors::FnQualifierInExtern {
-                span: span,
-                block: self.current_extern_span(),
-            });
+            self.dcx()
+                .emit_err(errors::FnQualifierInExtern { span, block: self.current_extern_span() });
         };
         match coroutine_kind {
             Some(knd) => report_err(knd.span()),
@@ -963,14 +961,13 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                 self_ty,
                 items,
             }) => {
-                let error =
-                    |annotation_span, annotation, only_trait: bool| errors::InherentImplCannot {
-                        span: self_ty.span,
-                        annotation_span,
-                        annotation,
-                        self_ty: self_ty.span,
-                        only_trait: only_trait.then_some(()),
-                    };
+                let error = |annotation_span, annotation, only_trait| errors::InherentImplCannot {
+                    span: self_ty.span,
+                    annotation_span,
+                    annotation,
+                    self_ty: self_ty.span,
+                    only_trait,
+                };
 
                 self.with_in_trait_impl(None, |this| {
                     this.visibility_not_permitted(
@@ -1195,7 +1192,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                 } else if where_clauses.after.has_where_token {
                     self.dcx().emit_err(errors::WhereClauseAfterTypeAlias {
                         span: where_clauses.after.span,
-                        help: self.session.is_nightly_build().then_some(()),
+                        help: self.session.is_nightly_build(),
                     });
                 }
             }

compiler/rustc_ast_passes/src/errors.rs

@@ -484,7 +484,7 @@ pub struct InherentImplCannot<'a> {
     #[label(ast_passes_type)]
     pub self_ty: Span,
     #[note(ast_passes_only_trait)]
-    pub only_trait: Option<()>,
+    pub only_trait: bool,
 }
 
 #[derive(Diagnostic)]
@@ -528,7 +528,7 @@ pub struct WhereClauseAfterTypeAlias {
     #[primary_span]
     pub span: Span,
     #[help]
-    pub help: Option<()>,
+    pub help: bool,
 }
 
 #[derive(Diagnostic)]

compiler/rustc_ast_passes/src/feature_gate.rs

@@ -556,7 +556,6 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) {
     gate_all!(fn_delegation, "functions delegation is not yet fully implemented");
     gate_all!(postfix_match, "postfix match is experimental");
     gate_all!(mut_ref, "mutable by-reference bindings are experimental");
-    gate_all!(precise_capturing, "precise captures on `impl Trait` are experimental");
     gate_all!(global_registration, "global registration is experimental");
     gate_all!(return_type_notation, "return type notation is experimental");
 

compiler/rustc_attr/src/builtin.rs

@@ -846,7 +846,7 @@ pub fn find_deprecation(
                                     sess.dcx().emit_err(
                                         session_diagnostics::DeprecatedItemSuggestion {
                                             span: mi.span,
-                                            is_nightly: sess.is_nightly_build().then_some(()),
+                                            is_nightly: sess.is_nightly_build(),
                                             details: (),
                                         },
                                     );

compiler/rustc_attr/src/session_diagnostics.rs

@@ -342,7 +342,7 @@ pub(crate) struct DeprecatedItemSuggestion {
     pub span: Span,
 
     #[help]
-    pub is_nightly: Option<()>,
+    pub is_nightly: bool,
 
     #[note]
     pub details: (),

compiler/rustc_borrowck/src/borrowck_errors.rs

@@ -290,7 +290,7 @@ impl<'infcx, 'tcx> crate::MirBorrowckCtxt<'_, '_, 'infcx, 'tcx> {
         ty: Ty<'_>,
         is_index: Option<bool>,
     ) -> Diag<'infcx> {
-        let type_name = match (&ty.kind(), is_index) {
+        let type_name = match (ty.kind(), is_index) {
             (&ty::Array(_, _), Some(true)) | (&ty::Array(_, _), None) => "array",
             (&ty::Slice(_), _) => "slice",
             _ => span_bug!(move_from_span, "this path should not cause illegal move"),

compiler/rustc_borrowck/src/places_conflict.rs

@@ -201,7 +201,7 @@ fn place_components_conflict<'tcx>(
 
             let base_ty = base.ty(body, tcx).ty;
 
-            match (elem, &base_ty.kind(), access) {
+            match (elem, base_ty.kind(), access) {
                 (_, _, Shallow(Some(ArtificialField::ArrayLength)))
                 | (_, _, Shallow(Some(ArtificialField::FakeBorrow))) => {
                     // The array length is like additional fields on the