Auto merge of rust-lang#138114 - compiler-errors:rollup-7xr4b69, r=compiler-errors

Rollup of 25 pull requests

Successful merges:

 - rust-lang#135733 (Implement `&pin const self` and `&pin mut self` sugars)
 - rust-lang#135895 (Document workings of successors more clearly)
 - rust-lang#136922 (Pattern types: Avoid having to handle an Option for range ends in the type system or the HIR)
 - rust-lang#137303 (Remove `MaybeForgetReturn` suggestion)
 - rust-lang#137327 (Undeprecate env::home_dir)
 - rust-lang#137358 (Match Ergonomics 2024: add context and examples to the unstable book)
 - rust-lang#137534 ([rustdoc] hide item that is not marked as doc(inline) and whose src is doc(hidden))
 - rust-lang#137565 (Try to point of macro expansion from resolver and method errors if it involves macro var)
 - rust-lang#137637 (Check dyn flavor before registering upcast goal on wide pointer cast in MIR typeck)
 - rust-lang#137643 (Add DWARF test case for non-C-like `repr128` enums)
 - rust-lang#137744 (Re-add `Clone`-derive on `Thir`)
 - rust-lang#137758 (fix usage of ty decl macro fragments in attributes)
 - rust-lang#137764 (Ensure that negative auto impls are always applicable)
 - rust-lang#137772 (Fix char count in `Display` for `ByteStr`)
 - rust-lang#137798 (ci: use ubuntu 24 on arm large runner)
 - rust-lang#137802 (miri native-call support: all previously exposed provenance is accessible to the callee)
 - rust-lang#137805 (adjust Layout debug printing to match the internal field name)
 - rust-lang#137808 (Do not require that unsafe fields lack drop glue)
 - rust-lang#137820 (Clarify why InhabitedPredicate::instantiate_opt exists)
 - rust-lang#137825 (Provide more context on resolve error caused from incorrect RTN)
 - rust-lang#137834 (rustc_fluent_macro: use CARGO_CRATE_NAME instead of CARGO_PKG_NAME)
 - rust-lang#137868 (Add minimal platform support documentation for powerpc-unknown-linux-gnuspe)
 - rust-lang#137910 (Improve error message for `AsyncFn` trait failure for RPIT)
 - rust-lang#137920 (interpret/provenance_map: consistently use range_is_empty)
 - rust-lang#138038 (Update `compiler-builtins` to 0.1.151)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Diff for: compiler/rustc_abi/src/lib.rs

@@ -1812,7 +1812,7 @@ where
         f.debug_struct("Layout")
             .field("size", size)
             .field("align", align)
-            .field("abi", backend_repr)
+            .field("backend_repr", backend_repr)
             .field("fields", fields)
             .field("largest_niche", largest_niche)
             .field("uninhabited", uninhabited)

Diff for: compiler/rustc_ast/src/ast.rs

@@ -2641,6 +2641,8 @@ pub enum SelfKind {
     Value(Mutability),
     /// `&'lt self`, `&'lt mut self`
     Region(Option<Lifetime>, Mutability),
+    /// `&'lt pin const self`, `&'lt pin mut self`
+    Pinned(Option<Lifetime>, Mutability),
     /// `self: TYPE`, `mut self: TYPE`
     Explicit(P<Ty>, Mutability),
 }
@@ -2650,6 +2652,8 @@ impl SelfKind {
         match self {
             SelfKind::Region(None, mutbl) => mutbl.ref_prefix_str().to_string(),
             SelfKind::Region(Some(lt), mutbl) => format!("&{lt} {}", mutbl.prefix_str()),
+            SelfKind::Pinned(None, mutbl) => format!("&pin {}", mutbl.ptr_str()),
+            SelfKind::Pinned(Some(lt), mutbl) => format!("&{lt} pin {}", mutbl.ptr_str()),
             SelfKind::Value(_) | SelfKind::Explicit(_, _) => {
                 unreachable!("if we had an explicit self, we wouldn't be here")
             }
@@ -2666,11 +2670,13 @@ impl Param {
             if ident.name == kw::SelfLower {
                 return match self.ty.kind {
                     TyKind::ImplicitSelf => Some(respan(self.pat.span, SelfKind::Value(mutbl))),
-                    TyKind::Ref(lt, MutTy { ref ty, mutbl })
-                    | TyKind::PinnedRef(lt, MutTy { ref ty, mutbl })
+                    TyKind::Ref(lt, MutTy { ref ty, mutbl }) if ty.kind.is_implicit_self() => {
+                        Some(respan(self.pat.span, SelfKind::Region(lt, mutbl)))
+                    }
+                    TyKind::PinnedRef(lt, MutTy { ref ty, mutbl })
                         if ty.kind.is_implicit_self() =>
                     {
-                        Some(respan(self.pat.span, SelfKind::Region(lt, mutbl)))
+                        Some(respan(self.pat.span, SelfKind::Pinned(lt, mutbl)))
                     }
                     _ => Some(respan(
                         self.pat.span.to(self.ty.span),
@@ -2712,6 +2718,15 @@ impl Param {
                     tokens: None,
                 }),
             ),
+            SelfKind::Pinned(lt, mutbl) => (
+                mutbl,
+                P(Ty {
+                    id: DUMMY_NODE_ID,
+                    kind: TyKind::PinnedRef(lt, MutTy { ty: infer_ty, mutbl }),
+                    span,
+                    tokens: None,
+                }),
+            ),
         };
         Param {
             attrs,

Diff for: compiler/rustc_ast_lowering/src/lib.rs

@@ -136,6 +136,7 @@ struct LoweringContext<'a, 'hir> {
 
     allow_try_trait: Arc<[Symbol]>,
     allow_gen_future: Arc<[Symbol]>,
+    allow_pattern_type: Arc<[Symbol]>,
     allow_async_iterator: Arc<[Symbol]>,
     allow_for_await: Arc<[Symbol]>,
     allow_async_fn_traits: Arc<[Symbol]>,
@@ -176,6 +177,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             impl_trait_defs: Vec::new(),
             impl_trait_bounds: Vec::new(),
             allow_try_trait: [sym::try_trait_v2, sym::yeet_desugar_details].into(),
+            allow_pattern_type: [sym::pattern_types, sym::pattern_type_range_trait].into(),
             allow_gen_future: if tcx.features().async_fn_track_caller() {
                 [sym::gen_future, sym::closure_track_caller].into()
             } else {
@@ -926,7 +928,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                     if let Some(first_char) = constraint.ident.as_str().chars().next()
                         && first_char.is_ascii_lowercase()
                     {
-                        tracing::info!(?data, ?data.inputs);
                         let err = match (&data.inputs[..], &data.output) {
                             ([_, ..], FnRetTy::Default(_)) => {
                                 errors::BadReturnTypeNotation::Inputs { span: data.inputs_span }
@@ -1365,7 +1366,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                 }
             }
             TyKind::Pat(ty, pat) => {
-                hir::TyKind::Pat(self.lower_ty(ty, itctx), self.lower_ty_pat(pat))
+                hir::TyKind::Pat(self.lower_ty(ty, itctx), self.lower_ty_pat(pat, ty.span))
             }
             TyKind::MacCall(_) => {
                 span_bug!(t.span, "`TyKind::MacCall` should have been expanded by now")

Diff for: compiler/rustc_ast_lowering/src/pat.rs

@@ -3,11 +3,11 @@ use std::sync::Arc;
 use rustc_ast::ptr::P;
 use rustc_ast::*;
 use rustc_data_structures::stack::ensure_sufficient_stack;
-use rustc_hir as hir;
-use rustc_hir::def::Res;
+use rustc_hir::def::{DefKind, Res};
+use rustc_hir::{self as hir, LangItem};
 use rustc_middle::span_bug;
 use rustc_span::source_map::{Spanned, respan};
-use rustc_span::{Ident, Span};
+use rustc_span::{DesugaringKind, Ident, Span, kw};
 
 use super::errors::{
     ArbitraryExpressionInPattern, ExtraDoubleDot, MisplacedDoubleDot, SubTupleBinding,
@@ -430,22 +430,124 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         self.arena.alloc(hir::PatExpr { hir_id: self.lower_node_id(expr.id), span, kind })
     }
 
-    pub(crate) fn lower_ty_pat(&mut self, pattern: &TyPat) -> &'hir hir::TyPat<'hir> {
-        self.arena.alloc(self.lower_ty_pat_mut(pattern))
+    pub(crate) fn lower_ty_pat(
+        &mut self,
+        pattern: &TyPat,
+        base_type: Span,
+    ) -> &'hir hir::TyPat<'hir> {
+        self.arena.alloc(self.lower_ty_pat_mut(pattern, base_type))
     }
 
-    fn lower_ty_pat_mut(&mut self, pattern: &TyPat) -> hir::TyPat<'hir> {
+    fn lower_ty_pat_mut(&mut self, pattern: &TyPat, base_type: Span) -> hir::TyPat<'hir> {
         // loop here to avoid recursion
         let pat_hir_id = self.lower_node_id(pattern.id);
         let node = match &pattern.kind {
-            TyPatKind::Range(e1, e2, Spanned { node: end, .. }) => hir::TyPatKind::Range(
-                e1.as_deref().map(|e| self.lower_anon_const_to_const_arg(e)),
-                e2.as_deref().map(|e| self.lower_anon_const_to_const_arg(e)),
-                self.lower_range_end(end, e2.is_some()),
+            TyPatKind::Range(e1, e2, Spanned { node: end, span }) => hir::TyPatKind::Range(
+                e1.as_deref().map(|e| self.lower_anon_const_to_const_arg(e)).unwrap_or_else(|| {
+                    self.lower_ty_pat_range_end(
+                        hir::LangItem::RangeMin,
+                        span.shrink_to_lo(),
+                        base_type,
+                    )
+                }),
+                e2.as_deref()
+                    .map(|e| match end {
+                        RangeEnd::Included(..) => self.lower_anon_const_to_const_arg(e),
+                        RangeEnd::Excluded => self.lower_excluded_range_end(e),
+                    })
+                    .unwrap_or_else(|| {
+                        self.lower_ty_pat_range_end(
+                            hir::LangItem::RangeMax,
+                            span.shrink_to_hi(),
+                            base_type,
+                        )
+                    }),
             ),
             TyPatKind::Err(guar) => hir::TyPatKind::Err(*guar),
         };
 
         hir::TyPat { hir_id: pat_hir_id, kind: node, span: self.lower_span(pattern.span) }
     }
+
+    /// Lowers the range end of an exclusive range (`2..5`) to an inclusive range 2..=(5 - 1).
+    /// This way the type system doesn't have to handle the distinction between inclusive/exclusive ranges.
+    fn lower_excluded_range_end(&mut self, e: &AnonConst) -> &'hir hir::ConstArg<'hir> {
+        let span = self.lower_span(e.value.span);
+        let unstable_span = self.mark_span_with_reason(
+            DesugaringKind::PatTyRange,
+            span,
+            Some(Arc::clone(&self.allow_pattern_type)),
+        );
+        let anon_const = self.with_new_scopes(span, |this| {
+            let def_id = this.local_def_id(e.id);
+            let hir_id = this.lower_node_id(e.id);
+            let body = this.lower_body(|this| {
+                // Need to use a custom function as we can't just subtract `1` from a `char`.
+                let kind = hir::ExprKind::Path(this.make_lang_item_qpath(
+                    hir::LangItem::RangeSub,
+                    unstable_span,
+                    None,
+                ));
+                let fn_def = this.arena.alloc(hir::Expr { hir_id: this.next_id(), kind, span });
+                let args = this.arena.alloc([this.lower_expr_mut(&e.value)]);
+                (
+                    &[],
+                    hir::Expr {
+                        hir_id: this.next_id(),
+                        kind: hir::ExprKind::Call(fn_def, args),
+                        span,
+                    },
+                )
+            });
+            hir::AnonConst { def_id, hir_id, body, span }
+        });
+        self.arena.alloc(hir::ConstArg {
+            hir_id: self.next_id(),
+            kind: hir::ConstArgKind::Anon(self.arena.alloc(anon_const)),
+        })
+    }
+
+    /// When a range has no end specified (`1..` or `1..=`) or no start specified (`..5` or `..=5`),
+    /// we instead use a constant of the MAX/MIN of the type.
+    /// This way the type system does not have to handle the lack of a start/end.
+    fn lower_ty_pat_range_end(
+        &mut self,
+        lang_item: LangItem,
+        span: Span,
+        base_type: Span,
+    ) -> &'hir hir::ConstArg<'hir> {
+        let parent_def_id = self.current_hir_id_owner.def_id;
+        let node_id = self.next_node_id();
+
+        // Add a definition for the in-band const def.
+        // We're generating a range end that didn't exist in the AST,
+        // so the def collector didn't create the def ahead of time. That's why we have to do
+        // it here.
+        let def_id = self.create_def(parent_def_id, node_id, kw::Empty, DefKind::AnonConst, span);
+        let hir_id = self.lower_node_id(node_id);
+
+        let unstable_span = self.mark_span_with_reason(
+            DesugaringKind::PatTyRange,
+            self.lower_span(span),
+            Some(Arc::clone(&self.allow_pattern_type)),
+        );
+        let span = self.lower_span(base_type);
+
+        let path_expr = hir::Expr {
+            hir_id: self.next_id(),
+            kind: hir::ExprKind::Path(self.make_lang_item_qpath(lang_item, unstable_span, None)),
+            span,
+        };
+
+        let ct = self.with_new_scopes(span, |this| {
+            self.arena.alloc(hir::AnonConst {
+                def_id,
+                hir_id,
+                body: this.lower_body(|_this| (&[], path_expr)),
+                span,
+            })
+        });
+        let hir_id = self.next_id();
+        self.arena.alloc(hir::ConstArg { kind: hir::ConstArgKind::Anon(ct), hir_id })
+    }
 }

Diff for: compiler/rustc_ast_lowering/src/path.rs

@@ -268,7 +268,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                 }
                 GenericArgs::Parenthesized(data) => match generic_args_mode {
                     GenericArgsMode::ReturnTypeNotation => {
-                        tracing::info!(?data, ?data.inputs);
                         let err = match (&data.inputs[..], &data.output) {
                             ([_, ..], FnRetTy::Default(_)) => {
                                 BadReturnTypeNotation::Inputs { span: data.inputs_span }

Diff for: compiler/rustc_ast_pretty/src/pprust/state.rs

@@ -1783,6 +1783,13 @@ impl<'a> State<'a> {
                 self.print_mutability(*m, false);
                 self.word("self")
             }
+            SelfKind::Pinned(lt, m) => {
+                self.word("&");
+                self.print_opt_lifetime(lt);
+                self.word("pin ");
+                self.print_mutability(*m, true);
+                self.word("self")
+            }
             SelfKind::Explicit(typ, m) => {
                 self.print_mutability(*m, false);
                 self.word("self");

Diff for: compiler/rustc_attr_parsing/src/parser.rs

@@ -473,6 +473,15 @@ impl<'a> MetaItemListParserContext<'a> {
         {
             self.inside_delimiters.next();
             return Some(MetaItemOrLitParser::Lit(lit));
+        } else if let Some(TokenTree::Delimited(.., Delimiter::Invisible(_), inner_tokens)) =
+            self.inside_delimiters.peek()
+        {
+            self.inside_delimiters.next();
+            return MetaItemListParserContext {
+                inside_delimiters: inner_tokens.iter().peekable(),
+                dcx: self.dcx,
+            }
+            .next();
         }
 
         // or a path.

Diff for: compiler/rustc_borrowck/src/type_check/mod.rs

@@ -2120,8 +2120,8 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                                 //
                                 // Note that other checks (such as denying `dyn Send` -> `dyn
                                 // Debug`) are in `rustc_hir_typeck`.
-                                if let ty::Dynamic(src_tty, _src_lt, _) = *src_tail.kind()
-                                    && let ty::Dynamic(dst_tty, dst_lt, _) = *dst_tail.kind()
+                                if let ty::Dynamic(src_tty, _src_lt, ty::Dyn) = *src_tail.kind()
+                                    && let ty::Dynamic(dst_tty, dst_lt, ty::Dyn) = *dst_tail.kind()
                                     && src_tty.principal().is_some()
                                     && dst_tty.principal().is_some()
                                 {

Diff for: compiler/rustc_codegen_cranelift/patches/0029-stdlib-Disable-f16-and-f128-in-compiler-builtins.patch

@@ -16,8 +16,8 @@ index 7165c3e48af..968552ad435 100644
 
  [dependencies]
  core = { path = "../core", public = true }
--compiler_builtins = { version = "=0.1.150", features = ['rustc-dep-of-std'] }
-+compiler_builtins = { version = "=0.1.150", features = ['rustc-dep-of-std', 'no-f16-f128'] }
+-compiler_builtins = { version = "=0.1.151", features = ['rustc-dep-of-std'] }
++compiler_builtins = { version = "=0.1.151", features = ['rustc-dep-of-std', 'no-f16-f128'] }
 
  [dev-dependencies]
  rand = { version = "0.8.5", default-features = false, features = ["alloc"] }

Diff for: compiler/rustc_const_eval/src/interpret/memory.rs

@@ -955,18 +955,13 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
 
     /// Handle the effect an FFI call might have on the state of allocations.
     /// This overapproximates the modifications which external code might make to memory:
-    /// We set all reachable allocations as initialized, mark all provenances as exposed
+    /// We set all reachable allocations as initialized, mark all reachable provenances as exposed
     /// and overwrite them with `Provenance::WILDCARD`.
-    pub fn prepare_for_native_call(
-        &mut self,
-        id: AllocId,
-        initial_prov: M::Provenance,
-    ) -> InterpResult<'tcx> {
-        // Expose provenance of the root allocation.
-        M::expose_provenance(self, initial_prov)?;
-
+    ///
+    /// The allocations in `ids` are assumed to be already exposed.
+    pub fn prepare_for_native_call(&mut self, ids: Vec<AllocId>) -> InterpResult<'tcx> {
         let mut done = FxHashSet::default();
-        let mut todo = vec![id];
+        let mut todo = ids;
         while let Some(id) = todo.pop() {
             if !done.insert(id) {
                 // We already saw this allocation before, don't process it again.

Diff for: compiler/rustc_data_structures/src/marker.rs

@@ -1,3 +1,5 @@
+use std::alloc::Allocator;
+
 #[rustc_on_unimplemented(message = "`{Self}` doesn't implement `DynSend`. \
             Add it to `rustc_data_structures::marker` or use `IntoDynSyncSend` if it's already `Send`")]
 // This is an auto trait for types which can be sent across threads if `sync::is_dyn_thread_safe()`
@@ -28,8 +30,8 @@ impls_dyn_send_neg!(
     [*const T where T: ?Sized]
     [*mut T where T: ?Sized]
     [std::ptr::NonNull<T> where T: ?Sized]
-    [std::rc::Rc<T> where T: ?Sized]
-    [std::rc::Weak<T> where T: ?Sized]
+    [std::rc::Rc<T, A> where T: ?Sized, A: Allocator]
+    [std::rc::Weak<T, A> where T: ?Sized, A: Allocator]
     [std::sync::MutexGuard<'_, T> where T: ?Sized]
     [std::sync::RwLockReadGuard<'_, T> where T: ?Sized]
     [std::sync::RwLockWriteGuard<'_, T> where T: ?Sized]
@@ -96,8 +98,8 @@ impls_dyn_sync_neg!(
     [std::cell::RefCell<T> where T: ?Sized]
     [std::cell::UnsafeCell<T> where T: ?Sized]
     [std::ptr::NonNull<T> where T: ?Sized]
-    [std::rc::Rc<T> where T: ?Sized]
-    [std::rc::Weak<T> where T: ?Sized]
+    [std::rc::Rc<T, A> where T: ?Sized, A: Allocator]
+    [std::rc::Weak<T, A> where T: ?Sized, A: Allocator]
     [std::cell::OnceCell<T> where T]
     [std::sync::mpsc::Receiver<T> where T]
     [std::sync::mpsc::Sender<T> where T]

Diff for: compiler/rustc_errors/src/lib.rs

@@ -626,7 +626,6 @@ pub enum StashKey {
     MaybeFruTypo,
     CallAssocMethod,
     AssociatedTypeSuggestion,
-    MaybeForgetReturn,
     /// Query cycle detected, stashing in favor of a better error.
     Cycle,
     UndeterminedMacroResolution,

Diff for: compiler/rustc_fluent_macro/src/fluent.rs

@@ -78,8 +78,8 @@ fn failed(crate_name: &Ident) -> proc_macro::TokenStream {
 
 /// See [rustc_fluent_macro::fluent_messages].
 pub(crate) fn fluent_messages(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
-    let crate_name = std::env::var("CARGO_PKG_NAME")
-        // If `CARGO_PKG_NAME` is missing, then we're probably running in a test, so use
+    let crate_name = std::env::var("CARGO_CRATE_NAME")
+        // If `CARGO_CRATE_NAME` is missing, then we're probably running in a test, so use
         // `no_crate`.
         .unwrap_or_else(|_| "no_crate".to_string())
         .replace("rustc_", "");

Diff for: compiler/rustc_hir/src/hir.rs

@@ -1600,7 +1600,7 @@ pub struct PatField<'hir> {
     pub span: Span,
 }
 
-#[derive(Copy, Clone, PartialEq, Debug, HashStable_Generic)]
+#[derive(Copy, Clone, PartialEq, Debug, HashStable_Generic, Hash, Eq, Encodable, Decodable)]
 pub enum RangeEnd {
     Included,
     Excluded,
@@ -1668,7 +1668,7 @@ pub enum PatExprKind<'hir> {
 #[derive(Debug, Clone, Copy, HashStable_Generic)]
 pub enum TyPatKind<'hir> {
     /// A range pattern (e.g., `1..=2` or `1..2`).
-    Range(Option<&'hir ConstArg<'hir>>, Option<&'hir ConstArg<'hir>>, RangeEnd),
+    Range(&'hir ConstArg<'hir>, &'hir ConstArg<'hir>),
 
     /// A placeholder for a pattern that wasn't well formed in some way.
     Err(ErrorGuaranteed),