Rollup of 8 pull requests

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_codegen_llvm/src/debuginfo/metadata.rs

@@ -629,6 +629,9 @@ pub fn file_metadata<'ll>(cx: &CodegenCx<'ll, '_>, source_file: &SourceFile) ->
         };
         let hash_value = hex_encode(source_file.src_hash.hash_bytes());
 
+        let source =
+            cx.sess().opts.unstable_opts.embed_source.then_some(()).and(source_file.src.as_ref());
+
         unsafe {
             llvm::LLVMRustDIBuilderCreateFile(
                 DIB(cx),
@@ -639,6 +642,8 @@ pub fn file_metadata<'ll>(cx: &CodegenCx<'ll, '_>, source_file: &SourceFile) ->
                 hash_kind,
                 hash_value.as_ptr().cast(),
                 hash_value.len(),
+                source.map_or(ptr::null(), |x| x.as_ptr().cast()),
+                source.map_or(0, |x| x.len()),
             )
         }
     }
@@ -659,6 +664,8 @@ pub fn unknown_file_metadata<'ll>(cx: &CodegenCx<'ll, '_>) -> &'ll DIFile {
             llvm::ChecksumKind::None,
             hash_value.as_ptr().cast(),
             hash_value.len(),
+            ptr::null(),
+            0,
         )
     })
 }
@@ -943,6 +950,8 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>(
             llvm::ChecksumKind::None,
             ptr::null(),
             0,
+            ptr::null(),
+            0,
         );
 
         let unit_metadata = llvm::LLVMRustDIBuilderCreateCompileUnit(

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -1860,6 +1860,8 @@ extern "C" {
         CSKind: ChecksumKind,
         Checksum: *const c_char,
         ChecksumLen: size_t,
+        Source: *const c_char,
+        SourceLen: size_t,
     ) -> &'a DIFile;
 
     pub fn LLVMRustDIBuilderCreateSubroutineType<'a>(

compiler/rustc_hir_analysis/src/check/check.rs

@@ -529,7 +529,7 @@ fn check_opaque_precise_captures<'tcx>(tcx: TyCtxt<'tcx>, opaque_def_id: LocalDe
 
         match tcx.named_bound_var(hir_id) {
             Some(ResolvedArg::EarlyBound(def_id)) => {
-                expected_captures.insert(def_id);
+                expected_captures.insert(def_id.to_def_id());
 
                 // Make sure we allow capturing these lifetimes through `Self` and
                 // `T::Assoc` projection syntax, too. These will occur when we only
@@ -538,7 +538,7 @@ fn check_opaque_precise_captures<'tcx>(tcx: TyCtxt<'tcx>, opaque_def_id: LocalDe
                 // feature -- see <https://github.com/rust-lang/rust/pull/115659>.
                 if let DefKind::LifetimeParam = tcx.def_kind(def_id)
                     && let Some(def_id) = tcx
-                        .map_opaque_lifetime_to_parent_lifetime(def_id.expect_local())
+                        .map_opaque_lifetime_to_parent_lifetime(def_id)
                         .opt_param_def_id(tcx, tcx.parent(opaque_def_id.to_def_id()))
                 {
                     shadowed_captures.insert(def_id);

compiler/rustc_hir_analysis/src/check/compare_impl_item/refine.rs

@@ -7,7 +7,8 @@ use rustc_lint_defs::builtin::{REFINING_IMPL_TRAIT_INTERNAL, REFINING_IMPL_TRAIT
 use rustc_middle::span_bug;
 use rustc_middle::traits::{ObligationCause, Reveal};
 use rustc_middle::ty::{
-    self, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperVisitable, TypeVisitable, TypeVisitor,
+    self, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperVisitable, TypeVisitable,
+    TypeVisitableExt, TypeVisitor,
 };
 use rustc_span::Span;
 use rustc_trait_selection::regions::InferCtxtRegionExt;
@@ -177,6 +178,10 @@ pub(super) fn check_refining_return_position_impl_trait_in_trait<'tcx>(
         return;
     };
 
+    if trait_bounds.references_error() || impl_bounds.references_error() {
+        return;
+    }
+
     // For quicker lookup, use an `IndexSet` (we don't use one earlier because
     // it's not foldable..).
     // Also, We have to anonymize binders in these types because they may contain

compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs

@@ -13,7 +13,6 @@ use rustc_ast::visit::walk_list;
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::def_id::LocalDefId;
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_hir::{GenericArg, GenericParam, GenericParamKind, HirId, HirIdMap, LifetimeName, Node};
 use rustc_macros::extension;
@@ -22,7 +21,7 @@ use rustc_middle::middle::resolve_bound_vars::*;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::{self, TyCtxt, TypeSuperVisitable, TypeVisitor};
 use rustc_middle::{bug, span_bug};
-use rustc_span::def_id::DefId;
+use rustc_span::def_id::{DefId, LocalDefId};
 use rustc_span::symbol::{sym, Ident};
 use rustc_span::Span;
 
@@ -32,7 +31,7 @@ use crate::errors;
 impl ResolvedArg {
     fn early(param: &GenericParam<'_>) -> (LocalDefId, ResolvedArg) {
         debug!("ResolvedArg::early: def_id={:?}", param.def_id);
-        (param.def_id, ResolvedArg::EarlyBound(param.def_id.to_def_id()))
+        (param.def_id, ResolvedArg::EarlyBound(param.def_id))
     }
 
     fn late(idx: u32, param: &GenericParam<'_>) -> (LocalDefId, ResolvedArg) {
@@ -41,10 +40,10 @@ impl ResolvedArg {
             "ResolvedArg::late: idx={:?}, param={:?} depth={:?} def_id={:?}",
             idx, param, depth, param.def_id,
         );
-        (param.def_id, ResolvedArg::LateBound(depth, idx, param.def_id.to_def_id()))
+        (param.def_id, ResolvedArg::LateBound(depth, idx, param.def_id))
     }
 
-    fn id(&self) -> Option<DefId> {
+    fn id(&self) -> Option<LocalDefId> {
         match *self {
             ResolvedArg::StaticLifetime | ResolvedArg::Error(_) => None,
 
@@ -288,13 +287,14 @@ fn late_arg_as_bound_arg<'tcx>(
 ) -> ty::BoundVariableKind {
     match arg {
         ResolvedArg::LateBound(_, _, def_id) => {
-            let name = tcx.hir().name(tcx.local_def_id_to_hir_id(def_id.expect_local()));
+            let def_id = def_id.to_def_id();
+            let name = tcx.item_name(def_id);
             match param.kind {
                 GenericParamKind::Lifetime { .. } => {
-                    ty::BoundVariableKind::Region(ty::BrNamed(*def_id, name))
+                    ty::BoundVariableKind::Region(ty::BrNamed(def_id, name))
                 }
                 GenericParamKind::Type { .. } => {
-                    ty::BoundVariableKind::Ty(ty::BoundTyKind::Param(*def_id, name))
+                    ty::BoundVariableKind::Ty(ty::BoundTyKind::Param(def_id, name))
                 }
                 GenericParamKind::Const { .. } => ty::BoundVariableKind::Const,
             }
@@ -717,7 +717,6 @@ impl<'a, 'tcx> Visitor<'tcx> for BoundVarContext<'a, 'tcx> {
                     // In the future, this should be fixed and this error should be removed.
                     let def = self.map.defs.get(&lifetime.hir_id).copied();
                     let Some(ResolvedArg::LateBound(_, _, lifetime_def_id)) = def else { continue };
-                    let Some(lifetime_def_id) = lifetime_def_id.as_local() else { continue };
                     let lifetime_hir_id = self.tcx.local_def_id_to_hir_id(lifetime_def_id);
 
                     let bad_place = match self.tcx.hir_node(self.tcx.parent_hir_id(lifetime_hir_id))
@@ -1150,7 +1149,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                             .param_def_id_to_index(self.tcx, region_def_id.to_def_id())
                             .is_some()
                     {
-                        break Some(ResolvedArg::EarlyBound(region_def_id.to_def_id()));
+                        break Some(ResolvedArg::EarlyBound(region_def_id));
                     }
                     break None;
                 }
@@ -1259,7 +1258,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                     kind => span_bug!(
                         use_span,
                         "did not expect to resolve lifetime to {}",
-                        kind.descr(param_def_id)
+                        kind.descr(param_def_id.to_def_id())
                     ),
                 };
                 def = ResolvedArg::Error(guar);
@@ -1277,10 +1276,10 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                         kind: hir::ImplItemKind::Fn(..),
                         ..
                     }) => {
-                        def = ResolvedArg::Free(owner_id.to_def_id(), def.id().unwrap());
+                        def = ResolvedArg::Free(owner_id.def_id, def.id().unwrap());
                     }
                     Node::Expr(hir::Expr { kind: hir::ExprKind::Closure(closure), .. }) => {
-                        def = ResolvedArg::Free(closure.def_id.to_def_id(), def.id().unwrap());
+                        def = ResolvedArg::Free(closure.def_id, def.id().unwrap());
                     }
                     _ => {}
                 }
@@ -1351,7 +1350,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                             .param_def_id_to_index(self.tcx, param_def_id.to_def_id())
                             .is_some()
                     {
-                        break Some(ResolvedArg::EarlyBound(param_def_id.to_def_id()));
+                        break Some(ResolvedArg::EarlyBound(param_def_id));
                     }
                     break None;
                 }

compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs

@@ -296,25 +296,29 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
             Some(rbv::ResolvedArg::StaticLifetime) => tcx.lifetimes.re_static,
 
             Some(rbv::ResolvedArg::LateBound(debruijn, index, def_id)) => {
-                let name = lifetime_name(def_id.expect_local());
+                let name = lifetime_name(def_id);
                 let br = ty::BoundRegion {
                     var: ty::BoundVar::from_u32(index),
-                    kind: ty::BrNamed(def_id, name),
+                    kind: ty::BrNamed(def_id.to_def_id(), name),
                 };
                 ty::Region::new_bound(tcx, debruijn, br)
             }
 
             Some(rbv::ResolvedArg::EarlyBound(def_id)) => {
-                let name = tcx.hir().ty_param_name(def_id.expect_local());
-                let item_def_id = tcx.hir().ty_param_owner(def_id.expect_local());
+                let name = tcx.hir().ty_param_name(def_id);
+                let item_def_id = tcx.hir().ty_param_owner(def_id);
                 let generics = tcx.generics_of(item_def_id);
-                let index = generics.param_def_id_to_index[&def_id];
+                let index = generics.param_def_id_to_index[&def_id.to_def_id()];
                 ty::Region::new_early_param(tcx, ty::EarlyParamRegion { index, name })
             }
 
             Some(rbv::ResolvedArg::Free(scope, id)) => {
-                let name = lifetime_name(id.expect_local());
-                ty::Region::new_late_param(tcx, scope, ty::BrNamed(id, name))
+                let name = lifetime_name(id);
+                ty::Region::new_late_param(
+                    tcx,
+                    scope.to_def_id(),
+                    ty::BrNamed(id.to_def_id(), name),
+                )
 
                 // (*) -- not late-bound, won't change
             }
@@ -1953,15 +1957,14 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
         let tcx = self.tcx();
         match tcx.named_bound_var(hir_id) {
             Some(rbv::ResolvedArg::LateBound(debruijn, index, def_id)) => {
-                let name = tcx.item_name(def_id);
+                let name = tcx.item_name(def_id.to_def_id());
                 let br = ty::BoundTy {
                     var: ty::BoundVar::from_u32(index),
-                    kind: ty::BoundTyKind::Param(def_id, name),
+                    kind: ty::BoundTyKind::Param(def_id.to_def_id(), name),
                 };
                 Ty::new_bound(tcx, debruijn, br)
             }
             Some(rbv::ResolvedArg::EarlyBound(def_id)) => {
-                let def_id = def_id.expect_local();
                 let item_def_id = tcx.hir().ty_param_owner(def_id);
                 let generics = tcx.generics_of(item_def_id);
                 let index = generics.param_def_id_to_index[&def_id.to_def_id()];
@@ -1982,10 +1985,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
             Some(rbv::ResolvedArg::EarlyBound(def_id)) => {
                 // Find the name and index of the const parameter by indexing the generics of
                 // the parent item and construct a `ParamConst`.
-                let item_def_id = tcx.parent(def_id);
+                let item_def_id = tcx.local_parent(def_id);
                 let generics = tcx.generics_of(item_def_id);
-                let index = generics.param_def_id_to_index[&def_id];
-                let name = tcx.item_name(def_id);
+                let index = generics.param_def_id_to_index[&def_id.to_def_id()];
+                let name = tcx.item_name(def_id.to_def_id());
                 ty::Const::new_param(tcx, ty::ParamConst::new(index, name))
             }
             Some(rbv::ResolvedArg::LateBound(debruijn, index, _)) => {

compiler/rustc_interface/src/tests.rs

@@ -774,6 +774,7 @@ fn test_unstable_options_tracking_hash() {
     tracked!(direct_access_external_data, Some(true));
     tracked!(dual_proc_macros, true);
     tracked!(dwarf_version, Some(5));
+    tracked!(embed_source, true);
     tracked!(emit_thin_lto, false);
     tracked!(export_executable_symbols, true);
     tracked!(fewer_names, Some(true));

compiler/rustc_lint/src/builtin.rs

@@ -1925,16 +1925,16 @@ impl ExplicitOutlivesRequirements {
     fn lifetimes_outliving_lifetime<'tcx>(
         tcx: TyCtxt<'tcx>,
         inferred_outlives: impl Iterator<Item = &'tcx (ty::Clause<'tcx>, Span)>,
-        item: DefId,
-        lifetime: DefId,
+        item: LocalDefId,
+        lifetime: LocalDefId,
     ) -> Vec<ty::Region<'tcx>> {
         let item_generics = tcx.generics_of(item);
 
         inferred_outlives
             .filter_map(|(clause, _)| match clause.kind().skip_binder() {
                 ty::ClauseKind::RegionOutlives(ty::OutlivesPredicate(a, b)) => match *a {
                     ty::ReEarlyParam(ebr)
-                        if item_generics.region_param(ebr, tcx).def_id == lifetime =>
+                        if item_generics.region_param(ebr, tcx).def_id == lifetime.to_def_id() =>
                     {
                         Some(b)
                     }
@@ -1982,7 +1982,7 @@ impl ExplicitOutlivesRequirements {
                 let is_inferred = match tcx.named_bound_var(lifetime.hir_id) {
                     Some(ResolvedArg::EarlyBound(def_id)) => inferred_outlives
                         .iter()
-                        .any(|r| matches!(**r, ty::ReEarlyParam(ebr) if { item_generics.region_param(ebr, tcx).def_id == def_id })),
+                        .any(|r| matches!(**r, ty::ReEarlyParam(ebr) if { item_generics.region_param(ebr, tcx).def_id == def_id.to_def_id() })),
                     _ => false,
                 };
 
@@ -2097,7 +2097,7 @@ impl<'tcx> LateLintPass<'tcx> for ExplicitOutlivesRequirements {
                                         inferred_outlives
                                             .iter()
                                             .filter(|(_, span)| !predicate.span.contains(*span)),
-                                        item.owner_id.to_def_id(),
+                                        item.owner_id.def_id,
                                         region_def_id,
                                     ),
                                     &predicate.bounds,

compiler/rustc_lint/src/drop_forget_useless.rs

@@ -151,10 +151,11 @@ impl<'tcx> LateLintPass<'tcx> for DropForgetUseless {
                     && let Node::Stmt(stmt) = node
                     && let StmtKind::Semi(e) = stmt.kind
                     && e.hir_id == expr.hir_id
+                    && let Some(arg_span) = arg.span.find_ancestor_inside(expr.span)
                 {
                     UseLetUnderscoreIgnoreSuggestion::Suggestion {
-                        start_span: expr.span.shrink_to_lo().until(arg.span),
-                        end_span: arg.span.shrink_to_hi().until(expr.span.shrink_to_hi()),
+                        start_span: expr.span.shrink_to_lo().until(arg_span),
+                        end_span: arg_span.shrink_to_hi().until(expr.span.shrink_to_hi()),
                     }
                 } else {
                     UseLetUnderscoreIgnoreSuggestion::Note

compiler/rustc_lint/src/impl_trait_overcaptures.rs

@@ -300,16 +300,17 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for VisitOpaqueTypes<'tcx> {
                         Some(
                             ResolvedArg::EarlyBound(def_id) | ResolvedArg::LateBound(_, _, def_id),
                         ) => {
-                            if self.tcx.def_kind(self.tcx.parent(def_id)) == DefKind::OpaqueTy {
+                            if self.tcx.def_kind(self.tcx.local_parent(def_id)) == DefKind::OpaqueTy
+                            {
                                 let def_id = self
                                     .tcx
-                                    .map_opaque_lifetime_to_parent_lifetime(def_id.expect_local())
+                                    .map_opaque_lifetime_to_parent_lifetime(def_id)
                                     .opt_param_def_id(self.tcx, self.parent_def_id.to_def_id())
                                     .expect("variable should have been duplicated from parent");
 
                                 explicitly_captured.insert(def_id);
                             } else {
-                                explicitly_captured.insert(def_id);
+                                explicitly_captured.insert(def_id.to_def_id());
                             }
                         }
                         _ => {

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -913,14 +913,19 @@ extern "C" LLVMMetadataRef
 LLVMRustDIBuilderCreateFile(LLVMRustDIBuilderRef Builder, const char *Filename,
                             size_t FilenameLen, const char *Directory,
                             size_t DirectoryLen, LLVMRustChecksumKind CSKind,
-                            const char *Checksum, size_t ChecksumLen) {
+                            const char *Checksum, size_t ChecksumLen,
+                            const char *Source, size_t SourceLen) {
 
   std::optional<DIFile::ChecksumKind> llvmCSKind = fromRust(CSKind);
   std::optional<DIFile::ChecksumInfo<StringRef>> CSInfo{};
   if (llvmCSKind)
     CSInfo.emplace(*llvmCSKind, StringRef{Checksum, ChecksumLen});
+  std::optional<StringRef> oSource{};
+  if (Source)
+    oSource = StringRef(Source, SourceLen);
   return wrap(Builder->createFile(StringRef(Filename, FilenameLen),
-                                  StringRef(Directory, DirectoryLen), CSInfo));
+                                  StringRef(Directory, DirectoryLen), CSInfo,
+                                  oSource));
 }
 
 extern "C" LLVMMetadataRef

compiler/rustc_middle/src/middle/resolve_bound_vars.rs

@@ -2,7 +2,7 @@
 
 use rustc_data_structures::fx::FxIndexMap;
 use rustc_errors::ErrorGuaranteed;
-use rustc_hir::def_id::DefId;
+use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::{ItemLocalId, OwnerId};
 use rustc_macros::{Decodable, Encodable, HashStable, TyDecodable, TyEncodable};
 
@@ -11,9 +11,9 @@ use crate::ty;
 #[derive(Clone, Copy, PartialEq, Eq, Hash, TyEncodable, TyDecodable, Debug, HashStable)]
 pub enum ResolvedArg {
     StaticLifetime,
-    EarlyBound(/* decl */ DefId),
-    LateBound(ty::DebruijnIndex, /* late-bound index */ u32, /* decl */ DefId),
-    Free(DefId, /* lifetime decl */ DefId),
+    EarlyBound(/* decl */ LocalDefId),
+    LateBound(ty::DebruijnIndex, /* late-bound index */ u32, /* decl */ LocalDefId),
+    Free(LocalDefId, /* lifetime decl */ LocalDefId),
     Error(ErrorGuaranteed),
 }