Auto merge of #124015 - GuillaumeGomez:rollup-s46ksxa, r=GuillaumeGomez

Rollup of 14 pull requests

Successful merges:

 - #120781 (Correct usage note on OpenOptions::append())
 - #121694 (sess: stabilize `-Zrelro-level` as `-Crelro-level`)
 - #122521 (doc(bootstrap): add top-level doc-comment to utils/tarball.rs)
 - #123491 (Fix ICE in `eval_body_using_ecx`)
 - #123574 (rustdoc: rename `issue-\d+.rs` tests to have meaningful names (part 6))
 - #123687 (Update ar_archive_writer to 0.2.0)
 - #123721 (Various visionOS fixes)
 - #123797 (Better graphviz output for SCCs and NLL constraints)
 - #123990 (Make `suggest_deref_closure_return` more idiomatic/easier to understand)
 - #123995 (Make `thir_tree` and `thir_flat` into hooks)
 - #123998 (Opaque types have no namespace)
 - #124001 (Fix docs for unstable_features lint.)
 - #124006 (Move size assertions for `mir::syntax` types into the same file)
 - #124011 (rustdoc: update the module-level docs of `rustdoc::clean`)

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

Cargo.lock

@@ -210,9 +210,9 @@ dependencies = [
 
 [[package]]
 name = "ar_archive_writer"
-version = "0.1.5"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9792d37ca5173d7e7f4fe453739a0671d0557915a030a383d6b866476bbc3e71"
+checksum = "f0c269894b6fe5e9d7ada0cf69b5bf847ff35bc25fc271f08e1d080fce80339a"
 dependencies = [
  "object 0.32.2",
 ]

compiler/rustc_borrowck/src/diagnostics/region_errors.rs

@@ -26,7 +26,6 @@ use rustc_middle::ty::{self, RegionVid, Ty};
 use rustc_middle::ty::{Region, TyCtxt};
 use rustc_span::symbol::{kw, Ident};
 use rustc_span::Span;
-use rustc_trait_selection::infer::type_variable::TypeVariableOrigin;
 use rustc_trait_selection::infer::InferCtxtExt;
 use rustc_trait_selection::traits::{Obligation, ObligationCtxt};
 
@@ -813,7 +812,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
         self.add_static_impl_trait_suggestion(&mut diag, *fr, fr_name, *outlived_fr);
         self.suggest_adding_lifetime_params(&mut diag, *fr, *outlived_fr);
         self.suggest_move_on_borrowing_closure(&mut diag);
-        self.suggest_deref_closure_value(&mut diag);
+        self.suggest_deref_closure_return(&mut diag);
 
         diag
     }
@@ -1048,115 +1047,107 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
     /// When encountering a lifetime error caused by the return type of a closure, check the
     /// corresponding trait bound and see if dereferencing the closure return value would satisfy
     /// them. If so, we produce a structured suggestion.
-    fn suggest_deref_closure_value(&self, diag: &mut Diag<'_>) {
+    fn suggest_deref_closure_return(&self, diag: &mut Diag<'_>) {
         let tcx = self.infcx.tcx;
-        let map = tcx.hir();
 
         // Get the closure return value and type.
-        let body_id = map.body_owned_by(self.mir_def_id());
-        let body = &map.body(body_id);
-        let value = &body.value.peel_blocks();
-        let hir::Node::Expr(closure_expr) = tcx.hir_node_by_def_id(self.mir_def_id()) else {
+        let closure_def_id = self.mir_def_id();
+        let hir::Node::Expr(
+            closure_expr @ hir::Expr {
+                kind: hir::ExprKind::Closure(hir::Closure { body, .. }), ..
+            },
+        ) = tcx.hir_node_by_def_id(closure_def_id)
+        else {
             return;
         };
-        let fn_call_id = tcx.parent_hir_id(self.mir_hir_id());
-        let hir::Node::Expr(expr) = tcx.hir_node(fn_call_id) else { return };
-        let def_id = map.enclosing_body_owner(fn_call_id);
-        let tables = tcx.typeck(def_id);
-        let Some(return_value_ty) = tables.node_type_opt(value.hir_id) else { return };
-        let return_value_ty = self.infcx.resolve_vars_if_possible(return_value_ty);
+        let ty::Closure(_, args) = *tcx.type_of(closure_def_id).instantiate_identity().kind()
+        else {
+            return;
+        };
+        let args = args.as_closure();
+
+        // Make sure that the parent expression is a method call.
+        let parent_expr_id = tcx.parent_hir_id(self.mir_hir_id());
+        let hir::Node::Expr(
+            parent_expr @ hir::Expr {
+                kind: hir::ExprKind::MethodCall(_, rcvr, call_args, _), ..
+            },
+        ) = tcx.hir_node(parent_expr_id)
+        else {
+            return;
+        };
+        let typeck_results = tcx.typeck(self.mir_def_id());
 
         // We don't use `ty.peel_refs()` to get the number of `*`s needed to get the root type.
-        let mut ty = return_value_ty;
+        let liberated_sig = tcx.liberate_late_bound_regions(closure_def_id.to_def_id(), args.sig());
+        let mut peeled_ty = liberated_sig.output();
         let mut count = 0;
-        while let ty::Ref(_, t, _) = ty.kind() {
-            ty = *t;
+        while let ty::Ref(_, ref_ty, _) = *peeled_ty.kind() {
+            peeled_ty = ref_ty;
             count += 1;
         }
-        if !self.infcx.type_is_copy_modulo_regions(self.param_env, ty) {
+        if !self.infcx.type_is_copy_modulo_regions(self.param_env, peeled_ty) {
             return;
         }
 
         // Build a new closure where the return type is an owned value, instead of a ref.
-        let Some(ty::Closure(did, args)) =
-            tables.node_type_opt(closure_expr.hir_id).as_ref().map(|ty| ty.kind())
-        else {
-            return;
-        };
-        let sig = args.as_closure().sig();
         let closure_sig_as_fn_ptr_ty = Ty::new_fn_ptr(
             tcx,
-            sig.map_bound(|s| {
-                let unsafety = hir::Unsafety::Normal;
-                use rustc_target::spec::abi;
-                tcx.mk_fn_sig(
-                    [s.inputs()[0]],
-                    s.output().peel_refs(),
-                    s.c_variadic,
-                    unsafety,
-                    abi::Abi::Rust,
-                )
-            }),
-        );
-        let parent_args = GenericArgs::identity_for_item(
-            tcx,
-            tcx.typeck_root_def_id(self.mir_def_id().to_def_id()),
+            ty::Binder::dummy(tcx.mk_fn_sig(
+                liberated_sig.inputs().iter().copied(),
+                peeled_ty,
+                liberated_sig.c_variadic,
+                hir::Unsafety::Normal,
+                rustc_target::spec::abi::Abi::Rust,
+            )),
         );
-        let closure_kind = args.as_closure().kind();
-        let closure_kind_ty = Ty::from_closure_kind(tcx, closure_kind);
-        let tupled_upvars_ty = self
-            .infcx
-            .next_ty_var(TypeVariableOrigin { param_def_id: None, span: closure_expr.span });
-        let closure_args = ty::ClosureArgs::new(
+        let closure_ty = Ty::new_closure(
             tcx,
-            ty::ClosureArgsParts {
-                parent_args,
-                closure_kind_ty,
-                closure_sig_as_fn_ptr_ty,
-                tupled_upvars_ty,
-            },
+            closure_def_id.to_def_id(),
+            ty::ClosureArgs::new(
+                tcx,
+                ty::ClosureArgsParts {
+                    parent_args: args.parent_args(),
+                    closure_kind_ty: args.kind_ty(),
+                    tupled_upvars_ty: args.tupled_upvars_ty(),
+                    closure_sig_as_fn_ptr_ty,
+                },
+            )
+            .args,
         );
-        let closure_ty = Ty::new_closure(tcx, *did, closure_args.args);
-        let closure_ty = tcx.erase_regions(closure_ty);
-
-        let hir::ExprKind::MethodCall(_, rcvr, args, _) = expr.kind else { return };
-        let Some(pos) = args
-            .iter()
-            .enumerate()
-            .find(|(_, arg)| arg.hir_id == closure_expr.hir_id)
-            .map(|(i, _)| i)
+
+        let Some((closure_arg_pos, _)) =
+            call_args.iter().enumerate().find(|(_, arg)| arg.hir_id == closure_expr.hir_id)
         else {
             return;
         };
-        // The found `Self` type of the method call.
-        let Some(possible_rcvr_ty) = tables.node_type_opt(rcvr.hir_id) else { return };
-        let Some(method_def_id) = tables.type_dependent_def_id(expr.hir_id) else { return };
-
         // Get the type for the parameter corresponding to the argument the closure with the
         // lifetime error we had.
-        let Some(input) = tcx
+        let Some(method_def_id) = typeck_results.type_dependent_def_id(parent_expr.hir_id) else {
+            return;
+        };
+        let Some(input_arg) = tcx
             .fn_sig(method_def_id)
-            .instantiate_identity()
+            .skip_binder()
             .inputs()
             .skip_binder()
             // Methods have a `self` arg, so `pos` is actually `+ 1` to match the method call arg.
-            .get(pos + 1)
+            .get(closure_arg_pos + 1)
         else {
             return;
         };
-
-        trace!(?input);
-
-        let ty::Param(closure_param) = input.kind() else { return };
+        // If this isn't a param, then we can't substitute a new closure.
+        let ty::Param(closure_param) = input_arg.kind() else { return };
 
         // Get the arguments for the found method, only specifying that `Self` is the receiver type.
+        let Some(possible_rcvr_ty) = typeck_results.node_type_opt(rcvr.hir_id) else { return };
         let args = GenericArgs::for_item(tcx, method_def_id, |param, _| {
             if param.index == 0 {
                 possible_rcvr_ty.into()
             } else if param.index == closure_param.index {
                 closure_ty.into()
             } else {
-                self.infcx.var_for_def(expr.span, param)
+                self.infcx.var_for_def(parent_expr.span, param)
             }
         });
 
@@ -1170,7 +1161,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
 
         if ocx.select_all_or_error().is_empty() {
             diag.span_suggestion_verbose(
-                value.span.shrink_to_lo(),
+                tcx.hir().body(*body).value.peel_blocks().span.shrink_to_lo(),
                 "dereference the return value",
                 "*".repeat(count),
                 Applicability::MachineApplicable,

compiler/rustc_borrowck/src/region_infer/graphviz.rs

@@ -6,7 +6,38 @@ use std::borrow::Cow;
 use std::io::{self, Write};
 
 use super::*;
+use itertools::Itertools;
 use rustc_graphviz as dot;
+use rustc_middle::ty::UniverseIndex;
+
+fn render_outlives_constraint(constraint: &OutlivesConstraint<'_>) -> String {
+    match constraint.locations {
+        Locations::All(_) => "All(...)".to_string(),
+        Locations::Single(loc) => format!("{loc:?}"),
+    }
+}
+
+fn render_universe(u: UniverseIndex) -> String {
+    if u.is_root() {
+        return "".to_string();
+    }
+
+    format!("/{:?}", u)
+}
+
+fn render_region_vid(rvid: RegionVid, regioncx: &RegionInferenceContext<'_>) -> String {
+    let universe_str = render_universe(regioncx.region_definition(rvid).universe);
+
+    let external_name_str = if let Some(external_name) =
+        regioncx.region_definition(rvid).external_name.and_then(|e| e.get_name())
+    {
+        format!(" ({external_name})")
+    } else {
+        "".to_string()
+    };
+
+    format!("{:?}{universe_str}{external_name_str}", rvid)
+}
 
 impl<'tcx> RegionInferenceContext<'tcx> {
     /// Write out the region constraint graph.
@@ -46,10 +77,10 @@ impl<'a, 'this, 'tcx> dot::Labeller<'this> for RawConstraints<'a, 'tcx> {
         Some(dot::LabelText::LabelStr(Cow::Borrowed("box")))
     }
     fn node_label(&'this self, n: &RegionVid) -> dot::LabelText<'this> {
-        dot::LabelText::LabelStr(format!("{n:?}").into())
+        dot::LabelText::LabelStr(render_region_vid(*n, self.regioncx).into())
     }
     fn edge_label(&'this self, e: &OutlivesConstraint<'tcx>) -> dot::LabelText<'this> {
-        dot::LabelText::LabelStr(format!("{:?}", e.locations).into())
+        dot::LabelText::LabelStr(render_outlives_constraint(e).into())
     }
 }
 
@@ -96,8 +127,9 @@ impl<'a, 'this, 'tcx> dot::Labeller<'this> for SccConstraints<'a, 'tcx> {
         Some(dot::LabelText::LabelStr(Cow::Borrowed("box")))
     }
     fn node_label(&'this self, n: &ConstraintSccIndex) -> dot::LabelText<'this> {
-        let nodes = &self.nodes_per_scc[*n];
-        dot::LabelText::LabelStr(format!("{n:?} = {nodes:?}").into())
+        let nodes_str =
+            self.nodes_per_scc[*n].iter().map(|n| render_region_vid(*n, self.regioncx)).join(", ");
+        dot::LabelText::LabelStr(format!("SCC({n}) = {{{nodes_str}}}", n = n.as_usize()).into())
     }
 }
 

compiler/rustc_borrowck/src/region_infer/mod.rs

@@ -1562,7 +1562,7 @@ impl<'tcx> RegionInferenceContext<'tcx> {
 
         // Because this free region must be in the ROOT universe, we
         // know it cannot contain any bound universes.
-        assert!(self.scc_universes[longer_fr_scc] == ty::UniverseIndex::ROOT);
+        assert!(self.scc_universes[longer_fr_scc].is_root());
         debug_assert!(self.scc_values.placeholders_contained_in(longer_fr_scc).next().is_none());
 
         // Only check all of the relations for the main representative of each

compiler/rustc_borrowck/src/region_infer/opaque_types.rs

@@ -213,7 +213,7 @@ impl<'tcx> RegionInferenceContext<'tcx> {
                 let scc = self.constraint_sccs.scc(vid);
 
                 // Special handling of higher-ranked regions.
-                if self.scc_universes[scc] != ty::UniverseIndex::ROOT {
+                if !self.scc_universes[scc].is_root() {
                     match self.scc_values.placeholders_contained_in(scc).enumerate().last() {
                         // If the region contains a single placeholder then they're equal.
                         Some((0, placeholder)) => {

compiler/rustc_codegen_ssa/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 # tidy-alphabetical-start
-ar_archive_writer = "0.1.5"
+ar_archive_writer = "0.2.0"
 bitflags = "2.4.1"
 cc = "1.0.90"
 itertools = "0.12"

compiler/rustc_codegen_ssa/src/back/archive.rs

@@ -285,14 +285,7 @@ impl<'a> ArArchiveBuilder<'a> {
             .tempfile_in(output.parent().unwrap_or_else(|| Path::new("")))
             .map_err(|err| io_error_context("couldn't create a temp file", err))?;
 
-        write_archive_to_stream(
-            archive_tmpfile.as_file_mut(),
-            &entries,
-            true,
-            archive_kind,
-            true,
-            false,
-        )?;
+        write_archive_to_stream(archive_tmpfile.as_file_mut(), &entries, archive_kind, false)?;
 
         let any_entries = !entries.is_empty();
         drop(entries);

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -2059,7 +2059,7 @@ fn add_library_search_dirs(cmd: &mut dyn Linker, sess: &Session, self_contained:
 /// Add options making relocation sections in the produced ELF files read-only
 /// and suppressing lazy binding.
 fn add_relro_args(cmd: &mut dyn Linker, sess: &Session) {
-    match sess.opts.unstable_opts.relro_level.unwrap_or(sess.target.relro_level) {
+    match sess.opts.cg.relro_level.unwrap_or(sess.target.relro_level) {
         RelroLevel::Full => cmd.full_relro(),
         RelroLevel::Partial => cmd.partial_relro(),
         RelroLevel::Off => cmd.no_relro(),
@@ -3038,9 +3038,10 @@ fn get_apple_sdk_root(sdk_name: &str) -> Result<String, errors::AppleSdkRootErro
                     || sdkroot.contains("MacOSX.platform") => {}
             "watchsimulator"
                 if sdkroot.contains("WatchOS.platform") || sdkroot.contains("MacOSX.platform") => {}
-            "visionos"
-                if sdkroot.contains("XROS.platform") || sdkroot.contains("MacOSX.platform") => {}
-            "visionossimulator"
+            "xros"
+                if sdkroot.contains("XRSimulator.platform")
+                    || sdkroot.contains("MacOSX.platform") => {}
+            "xrsimulator"
                 if sdkroot.contains("XROS.platform") || sdkroot.contains("MacOSX.platform") => {}
             // Ignore `SDKROOT` if it's not a valid path.
             _ if !p.is_absolute() || p == Path::new("/") || !p.exists() => {}

compiler/rustc_hir/src/def.rs

@@ -207,7 +207,6 @@ impl DefKind {
             | DefKind::Enum
             | DefKind::Variant
             | DefKind::Trait
-            | DefKind::OpaqueTy
             | DefKind::TyAlias
             | DefKind::ForeignTy
             | DefKind::TraitAlias
@@ -234,7 +233,8 @@ impl DefKind {
             | DefKind::Use
             | DefKind::ForeignMod
             | DefKind::GlobalAsm
-            | DefKind::Impl { .. } => None,
+            | DefKind::Impl { .. }
+            | DefKind::OpaqueTy => None,
         }
     }
 

compiler/rustc_interface/src/tests.rs

@@ -624,6 +624,7 @@ fn test_codegen_options_tracking_hash() {
     tracked!(profile_generate, SwitchWithOptPath::Enabled(None));
     tracked!(profile_use, Some(PathBuf::from("abc")));
     tracked!(relocation_model, Some(RelocModel::Pic));
+    tracked!(relro_level, Some(RelroLevel::Full));
     tracked!(soft_float, true);
     tracked!(split_debuginfo, Some(SplitDebuginfo::Packed));
     tracked!(symbol_mangling_version, Some(SymbolManglingVersion::V0));
@@ -822,7 +823,6 @@ fn test_unstable_options_tracking_hash() {
     tracked!(profile_sample_use, Some(PathBuf::from("abc")));
     tracked!(profiler_runtime, "abc".to_string());
     tracked!(relax_elf_relocations, Some(true));
-    tracked!(relro_level, Some(RelroLevel::Full));
     tracked!(remap_cwd_prefix, Some(PathBuf::from("abc")));
     tracked!(sanitizer, SanitizerSet::ADDRESS);
     tracked!(sanitizer_cfi_canonical_jump_tables, None);

compiler/rustc_middle/src/hooks/mod.rs

@@ -102,4 +102,10 @@ declare_hooks! {
     /// turn a deserialized `DefPathHash` into its current `DefId`.
     /// Will fetch a DefId from a DefPathHash for a foreign crate.
     hook def_path_hash_to_def_id_extern(hash: DefPathHash, stable_crate_id: StableCrateId) -> DefId;
+
+    /// Create a THIR tree for debugging.
+    hook thir_tree(key: LocalDefId) -> String;
+
+    /// Create a list-like THIR representation for debugging.
+    hook thir_flat(key: LocalDefId) -> String;
 }