Rollup of 15 pull requests

compiler/rustc_ast_lowering/src/expr.rs

@@ -98,7 +98,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
             }
 
             let expr_hir_id = self.lower_node_id(e.id);
-            self.lower_attrs(expr_hir_id, &e.attrs, e.span);
+            let attrs = self.lower_attrs(expr_hir_id, &e.attrs, e.span);
 
             let kind = match &e.kind {
                 ExprKind::Array(exprs) => hir::ExprKind::Array(self.lower_exprs(exprs)),
@@ -232,10 +232,10 @@ impl<'hir> LoweringContext<'_, 'hir> {
                         *fn_arg_span,
                     ),
                     None => self.lower_expr_closure(
+                        attrs,
                         binder,
                         *capture_clause,
                         e.id,
-                        expr_hir_id,
                         *constness,
                         *movability,
                         fn_decl,
@@ -1052,10 +1052,10 @@ impl<'hir> LoweringContext<'_, 'hir> {
 
     fn lower_expr_closure(
         &mut self,
+        attrs: &[rustc_hir::Attribute],
         binder: &ClosureBinder,
         capture_clause: CaptureBy,
         closure_id: NodeId,
-        closure_hir_id: hir::HirId,
         constness: Const,
         movability: Movability,
         decl: &FnDecl,
@@ -1067,15 +1067,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let (binder_clause, generic_params) = self.lower_closure_binder(binder);
 
         let (body_id, closure_kind) = self.with_new_scopes(fn_decl_span, move |this| {
-            let mut coroutine_kind = if this
-                .attrs
-                .get(&closure_hir_id.local_id)
-                .is_some_and(|attrs| attrs.iter().any(|attr| attr.has_name(sym::coroutine)))
-            {
-                Some(hir::CoroutineKind::Coroutine(Movability::Movable))
-            } else {
-                None
-            };
+
+            let mut coroutine_kind = find_attr!(attrs, AttributeKind::Coroutine(_) => hir::CoroutineKind::Coroutine(Movability::Movable));
+
             // FIXME(contracts): Support contracts on closures?
             let body_id = this.lower_fn_body(decl, None, |this| {
                 this.coroutine_kind = coroutine_kind;

compiler/rustc_attr_parsing/messages.ftl

@@ -32,6 +32,11 @@ attr_parsing_ill_formed_attribute_input = {$num_suggestions ->
         *[other] valid forms for the attribute are {$suggestions}
     }
 
+attr_parsing_invalid_macro_export_arguments = {$num_suggestions ->
+        [1] attribute must be of the form {$suggestions}
+        *[other] valid forms for the attribute are {$suggestions}
+    }
+
 attr_parsing_incorrect_repr_format_align_one_arg =
     incorrect `repr(align)` attribute format: `align` takes exactly one argument in parentheses
 

compiler/rustc_attr_parsing/src/attributes/body.rs

@@ -0,0 +1,15 @@
+//! Attributes that can be found in function body.
+
+use rustc_hir::attrs::AttributeKind;
+use rustc_span::{Symbol, sym};
+
+use super::{NoArgsAttributeParser, OnDuplicate};
+use crate::context::Stage;
+
+pub(crate) struct CoroutineParser;
+
+impl<S: Stage> NoArgsAttributeParser<S> for CoroutineParser {
+    const PATH: &[Symbol] = &[sym::coroutine];
+    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Error;
+    const CREATE: fn(rustc_span::Span) -> AttributeKind = |span| AttributeKind::Coroutine(span);
+}

compiler/rustc_attr_parsing/src/attributes/macro_attrs.rs

@@ -1,10 +1,14 @@
 use rustc_errors::DiagArgValue;
 use rustc_feature::{AttributeTemplate, template};
 use rustc_hir::attrs::{AttributeKind, MacroUseArgs};
+use rustc_hir::lints::AttributeLintKind;
 use rustc_span::{Span, Symbol, sym};
 use thin_vec::ThinVec;
 
-use crate::attributes::{AcceptMapping, AttributeParser, NoArgsAttributeParser, OnDuplicate};
+use crate::attributes::{
+    AcceptMapping, AttributeOrder, AttributeParser, NoArgsAttributeParser, OnDuplicate,
+    SingleAttributeParser,
+};
 use crate::context::{AcceptContext, FinalizeContext, Stage};
 use crate::parser::ArgParser;
 use crate::session_diagnostics;
@@ -113,3 +117,58 @@ impl<S: Stage> AttributeParser<S> for MacroUseParser {
         Some(AttributeKind::MacroUse { span: self.first_span?, arguments: self.state })
     }
 }
+
+pub(crate) struct MacroExportParser;
+
+impl<S: Stage> SingleAttributeParser<S> for crate::attributes::macro_attrs::MacroExportParser {
+    const PATH: &[Symbol] = &[sym::macro_export];
+    const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepOutermost;
+    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
+    const TEMPLATE: AttributeTemplate = template!(Word, List: "local_inner_macros");
+
+    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
+        let suggestions =
+            || <Self as SingleAttributeParser<S>>::TEMPLATE.suggestions(false, "macro_export");
+        let local_inner_macros = match args {
+            ArgParser::NoArgs => false,
+            ArgParser::List(list) => {
+                let Some(l) = list.single() else {
+                    let span = cx.attr_span;
+                    cx.emit_lint(
+                        AttributeLintKind::InvalidMacroExportArguments {
+                            suggestions: suggestions(),
+                        },
+                        span,
+                    );
+                    return None;
+                };
+                match l.meta_item().and_then(|i| i.path().word_sym()) {
+                    Some(sym::local_inner_macros) => true,
+                    _ => {
+                        let span = cx.attr_span;
+                        cx.emit_lint(
+                            AttributeLintKind::InvalidMacroExportArguments {
+                                suggestions: suggestions(),
+                            },
+                            span,
+                        );
+                        return None;
+                    }
+                }
+            }
+            ArgParser::NameValue(_) => {
+                let span = cx.attr_span;
+                let suggestions = suggestions();
+                cx.emit_err(session_diagnostics::IllFormedAttributeInputLint {
+                    num_suggestions: suggestions.len(),
+                    suggestions: DiagArgValue::StrListSepByAnd(
+                        suggestions.into_iter().map(|s| format!("`{s}`").into()).collect(),
+                    ),
+                    span,
+                });
+                return None;
+            }
+        };
+        Some(AttributeKind::MacroExport { span: cx.attr_span, local_inner_macros })
+    }
+}

compiler/rustc_attr_parsing/src/attributes/mod.rs

@@ -26,6 +26,7 @@ use crate::parser::ArgParser;
 use crate::session_diagnostics::UnusedMultiple;
 
 pub(crate) mod allow_unstable;
+pub(crate) mod body;
 pub(crate) mod cfg;
 pub(crate) mod cfg_old;
 pub(crate) mod codegen_attrs;

compiler/rustc_attr_parsing/src/context.rs

@@ -16,6 +16,7 @@ use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span, Symbol, sym};
 use crate::attributes::allow_unstable::{
     AllowConstFnUnstableParser, AllowInternalUnstableParser, UnstableFeatureBoundParser,
 };
+use crate::attributes::body::CoroutineParser;
 use crate::attributes::codegen_attrs::{
     ColdParser, CoverageParser, ExportNameParser, NakedParser, NoMangleParser, OptimizeParser,
     TargetFeatureParser, TrackCallerParser, UsedParser,
@@ -32,7 +33,7 @@ use crate::attributes::lint_helpers::{
     AsPtrParser, AutomaticallyDerivedParser, PassByValueParser, PubTransparentParser,
 };
 use crate::attributes::loop_match::{ConstContinueParser, LoopMatchParser};
-use crate::attributes::macro_attrs::{MacroEscapeParser, MacroUseParser};
+use crate::attributes::macro_attrs::{MacroEscapeParser, MacroExportParser, MacroUseParser};
 use crate::attributes::must_use::MustUseParser;
 use crate::attributes::no_implicit_prelude::NoImplicitPreludeParser;
 use crate::attributes::non_exhaustive::NonExhaustiveParser;
@@ -164,6 +165,7 @@ attribute_parsers!(
         Single<LinkNameParser>,
         Single<LinkOrdinalParser>,
         Single<LinkSectionParser>,
+        Single<MacroExportParser>,
         Single<MustUseParser>,
         Single<OptimizeParser>,
         Single<PathAttributeParser>,
@@ -184,6 +186,7 @@ attribute_parsers!(
         Single<WithoutArgs<ConstContinueParser>>,
         Single<WithoutArgs<ConstStabilityIndirectParser>>,
         Single<WithoutArgs<ConstTraitParser>>,
+        Single<WithoutArgs<CoroutineParser>>,
         Single<WithoutArgs<DenyExplicitImplParser>>,
         Single<WithoutArgs<DoNotImplementViaObjectParser>>,
         Single<WithoutArgs<ExportStableParser>>,

compiler/rustc_attr_parsing/src/lints.rs

@@ -34,5 +34,17 @@ pub fn emit_attribute_lint<L: LintEmitter>(lint: &AttributeLint<HirId>, lint_emi
             *first_span,
             session_diagnostics::EmptyAttributeList { attr_span: *first_span },
         ),
+        AttributeLintKind::InvalidMacroExportArguments { suggestions } => lint_emitter
+            .emit_node_span_lint(
+                rustc_session::lint::builtin::INVALID_MACRO_EXPORT_ARGUMENTS,
+                *id,
+                *span,
+                session_diagnostics::IllFormedAttributeInput {
+                    num_suggestions: suggestions.len(),
+                    suggestions: DiagArgValue::StrListSepByAnd(
+                        suggestions.into_iter().map(|s| format!("`{s}`").into()).collect(),
+                    ),
+                },
+            ),
     }
 }

compiler/rustc_const_eval/src/lib.rs

@@ -1,6 +1,7 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
+#![cfg_attr(bootstrap, feature(strict_overflow_ops))]
 #![doc(rust_logo)]
 #![feature(array_try_map)]
 #![feature(assert_matches)]
@@ -10,7 +11,6 @@
 #![feature(never_type)]
 #![feature(rustdoc_internals)]
 #![feature(slice_ptr_get)]
-#![feature(strict_overflow_ops)]
 #![feature(trait_alias)]
 #![feature(try_blocks)]
 #![feature(unqualified_local_imports)]

compiler/rustc_expand/src/base.rs

@@ -910,9 +910,9 @@ impl SyntaxExtension {
         let allow_internal_unsafe =
             ast::attr::find_by_name(attrs, sym::allow_internal_unsafe).is_some();
 
-        let local_inner_macros = ast::attr::find_by_name(attrs, sym::macro_export)
-            .and_then(|macro_export| macro_export.meta_item_list())
-            .is_some_and(|l| ast::attr::list_contains_name(&l, sym::local_inner_macros));
+        let local_inner_macros =
+            *find_attr!(attrs, AttributeKind::MacroExport {local_inner_macros: l, ..} => l)
+                .unwrap_or(&false);
         let collapse_debuginfo = Self::get_collapse_debuginfo(sess, attrs, !is_local);
         tracing::debug!(?name, ?local_inner_macros, ?collapse_debuginfo, ?allow_internal_unsafe);
 

compiler/rustc_hir/src/attrs/data_structures.rs

@@ -297,6 +297,9 @@ pub enum AttributeKind {
     /// Represents `#[const_trait]`.
     ConstTrait(Span),
 
+    /// Represents `#[coroutine]`.
+    Coroutine(Span),
+
     /// Represents `#[coverage(..)]`.
     Coverage(Span, CoverageAttrKind),
 
@@ -360,6 +363,9 @@ pub enum AttributeKind {
     /// Represents `#[macro_escape]`.
     MacroEscape(Span),
 
+    /// Represents [`#[macro_export]`](https://doc.rust-lang.org/reference/macros-by-example.html#r-macro.decl.scope.path).
+    MacroExport { span: Span, local_inner_macros: bool },
+
     /// Represents `#[rustc_macro_transparency]`.
     MacroTransparency(Transparency),
 

compiler/rustc_hir/src/attrs/encode_cross_crate.rs

@@ -28,6 +28,7 @@ impl AttributeKind {
             ConstStability { .. } => Yes,
             ConstStabilityIndirect => No,
             ConstTrait(..) => No,
+            Coroutine(..) => No,
             Coverage(..) => No,
             DenyExplicitImpl(..) => No,
             Deprecation { .. } => Yes,
@@ -46,6 +47,7 @@ impl AttributeKind {
             LinkSection { .. } => Yes, // Needed for rustdoc
             LoopMatch(..) => No,
             MacroEscape(..) => No,
+            MacroExport { .. } => Yes,
             MacroTransparency(..) => Yes,
             MacroUse { .. } => No,
             Marker(..) => No,

compiler/rustc_hir/src/lints.rs

@@ -31,7 +31,22 @@ pub struct AttributeLint<Id> {
 
 #[derive(Clone, Debug, HashStable_Generic)]
 pub enum AttributeLintKind {
-    UnusedDuplicate { this: Span, other: Span, warning: bool },
-    IllFormedAttributeInput { suggestions: Vec<String> },
-    EmptyAttribute { first_span: Span },
+    UnusedDuplicate {
+        this: Span,
+        other: Span,
+        warning: bool,
+    },
+    IllFormedAttributeInput {
+        suggestions: Vec<String>,
+    },
+    EmptyAttribute {
+        first_span: Span,
+    },
+
+    /// Copy of `IllFormedAttributeInput`
+    /// specifically for the `invalid_macro_export_arguments` lint until that is removed,
+    /// see <https://github.com/rust-lang/rust/pull/143857#issuecomment-3079175663>
+    InvalidMacroExportArguments {
+        suggestions: Vec<String>,
+    },
 }

compiler/rustc_lint/src/non_local_def.rs

@@ -1,11 +1,12 @@
 use rustc_errors::MultiSpan;
+use rustc_hir::attrs::AttributeKind;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::intravisit::{self, Visitor, VisitorExt};
-use rustc_hir::{Body, HirId, Item, ItemKind, Node, Path, TyKind};
+use rustc_hir::{Body, HirId, Item, ItemKind, Node, Path, TyKind, find_attr};
 use rustc_middle::ty::TyCtxt;
 use rustc_session::{declare_lint, impl_lint_pass};
 use rustc_span::def_id::{DefId, LOCAL_CRATE};
-use rustc_span::{ExpnKind, MacroKind, Span, kw, sym};
+use rustc_span::{ExpnKind, MacroKind, Span, kw};
 
 use crate::lints::{NonLocalDefinitionsCargoUpdateNote, NonLocalDefinitionsDiag};
 use crate::{LateContext, LateLintPass, LintContext, fluent_generated as fluent};
@@ -241,7 +242,10 @@ impl<'tcx> LateLintPass<'tcx> for NonLocalDefinitions {
                 )
             }
             ItemKind::Macro(_, _macro, MacroKind::Bang)
-                if cx.tcx.has_attr(item.owner_id.def_id, sym::macro_export) =>
+                if find_attr!(
+                    cx.tcx.get_all_attrs(item.owner_id.def_id),
+                    AttributeKind::MacroExport { .. }
+                ) =>
             {
                 cx.emit_span_lint(
                     NON_LOCAL_DEFINITIONS,

compiler/rustc_lint_defs/src/builtin.rs

@@ -2839,7 +2839,7 @@ declare_lint! {
     /// [issue #79813]: https://github.com/rust-lang/rust/issues/79813
     /// [future-incompatible]: ../index.md#future-incompatible-lints
     pub SEMICOLON_IN_EXPRESSIONS_FROM_MACROS,
-    Warn,
+    Deny,
     "trailing semicolon in macro body used as expression",
     @future_incompatible = FutureIncompatibleInfo {
         reason: FutureIncompatibilityReason::FutureReleaseError,
@@ -4188,8 +4188,13 @@ declare_lint! {
     /// You can't have multiple arguments in a `#[macro_export(..)]`, or mention arguments other than `local_inner_macros`.
     ///
     pub INVALID_MACRO_EXPORT_ARGUMENTS,
-    Warn,
+    Deny,
     "\"invalid_parameter\" isn't a valid argument for `#[macro_export]`",
+    @future_incompatible = FutureIncompatibleInfo {
+        reason: FutureIncompatibilityReason::FutureReleaseError,
+        reference: "issue #57571 <https://github.com/rust-lang/rust/issues/57571>",
+        report_in_deps: true,
+    };
 }
 
 declare_lint! {

compiler/rustc_mir_build/src/check_tail_calls.rs

@@ -60,9 +60,13 @@ impl<'tcx> TailCallCkVisitor<'_, 'tcx> {
         let BodyTy::Fn(caller_sig) = self.thir.body_type else {
             span_bug!(
                 call.span,
-                "`become` outside of functions should have been disallowed by hit_typeck"
+                "`become` outside of functions should have been disallowed by hir_typeck"
             )
         };
+        // While the `caller_sig` does have its regions erased, it does not have its
+        // binders anonymized. We call `erase_regions` once again to anonymize any binders
+        // within the signature, such as in function pointer or `dyn Trait` args.
+        let caller_sig = self.tcx.erase_regions(caller_sig);
 
         let ExprKind::Scope { value, .. } = call.kind else {
             span_bug!(call.span, "expected scope, found: {call:?}")

compiler/rustc_passes/messages.ftl

@@ -399,10 +399,6 @@ passes_invalid_attr_at_crate_level =
 passes_invalid_attr_at_crate_level_item =
     the inner attribute doesn't annotate this {$kind}
 
-passes_invalid_macro_export_arguments = invalid `#[macro_export]` argument
-
-passes_invalid_macro_export_arguments_too_many_items = `#[macro_export]` can only take 1 or 0 arguments
-
 passes_lang_item_fn = {$name ->
     [panic_impl] `#[panic_handler]`
     *[other] `{$name}` lang item