Auto merge of #136331 - jhpratt:rollup-curo1f4, r=jhpratt

Rollup of 8 pull requests

Successful merges:

 - #135414 (Stabilize `const_black_box`)
 - #136150 (ci: use windows 2025 for i686-mingw)
 - #136258 (rustdoc: rename `issue-\d+.rs` tests to have meaningful names (part 11))
 - #136270 (Remove `NamedVarMap`.)
 - #136278 (add constraint graph to polonius MIR dump)
 - #136287 (LLVM changed the nocapture attribute to captures(none))
 - #136291 (some test suite cleanups)
 - #136296 (float::min/max: mention the non-determinism around signed 0)

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

51 files changed, 287 insertions, 188 deletions

diff --git a/compiler/rustc_borrowck/src/polonius/dump.rs b/compiler/rustc_borrowck/src/polonius/dump.rs
index f71e6f3e6f3..6d32ee17f4c 100644
--- a/compiler/rustc_borrowck/src/polonius/dump.rs
+++ b/compiler/rustc_borrowck/src/polonius/dump.rs
@@ -1,17 +1,19 @@
 use std::io;
 
-use rustc_data_structures::fx::FxHashSet;
+use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
 use rustc_index::IndexVec;
 use rustc_middle::mir::pretty::{
     PassWhere, PrettyPrintMirOptions, create_dump_file, dump_enabled, dump_mir_to_writer,
 };
-use rustc_middle::mir::{Body, ClosureRegionRequirements};
+use rustc_middle::mir::{Body, ClosureRegionRequirements, Location};
 use rustc_middle::ty::{RegionVid, TyCtxt};
+use rustc_mir_dataflow::points::PointIndex;
 use rustc_session::config::MirIncludeSpans;
 
 use crate::borrow_set::BorrowSet;
 use crate::constraints::OutlivesConstraint;
 use crate::polonius::{LocalizedOutlivesConstraint, LocalizedOutlivesConstraintSet};
+use crate::region_infer::values::LivenessValues;
 use crate::type_check::Locations;
 use crate::{BorrowckInferCtxt, RegionInferenceContext};
 
@@ -80,14 +82,27 @@ fn emit_polonius_dump<'tcx>(
         body,
         regioncx,
         borrow_set,
-        localized_outlives_constraints,
+        &localized_outlives_constraints,
         closure_region_requirements,
         out,
     )?;
     writeln!(out, "</code></pre>")?;
     writeln!(out, "</div>")?;
 
-    // Section 2: mermaid visualization of the CFG.
+    // Section 2: mermaid visualization of the polonius constraint graph.
+    writeln!(out, "<div>")?;
+    writeln!(out, "Polonius constraint graph")?;
+    writeln!(out, "<pre class='mermaid'>")?;
+    let edge_count = emit_mermaid_constraint_graph(
+        borrow_set,
+        regioncx.liveness_constraints(),
+        &localized_outlives_constraints,
+        out,
+    )?;
+    writeln!(out, "</pre>")?;
+    writeln!(out, "</div>")?;
+
+    // Section 3: mermaid visualization of the CFG.
     writeln!(out, "<div>")?;
     writeln!(out, "Control-flow graph")?;
     writeln!(out, "<pre class='mermaid'>")?;
@@ -95,7 +110,7 @@ fn emit_polonius_dump<'tcx>(
     writeln!(out, "</pre>")?;
     writeln!(out, "</div>")?;
 
-    // Section 3: mermaid visualization of the NLL region graph.
+    // Section 4: mermaid visualization of the NLL region graph.
     writeln!(out, "<div>")?;
     writeln!(out, "NLL regions")?;
     writeln!(out, "<pre class='mermaid'>")?;
@@ -103,7 +118,7 @@ fn emit_polonius_dump<'tcx>(
     writeln!(out, "</pre>")?;
     writeln!(out, "</div>")?;
 
-    // Section 4: mermaid visualization of the NLL SCC graph.
+    // Section 5: mermaid visualization of the NLL SCC graph.
     writeln!(out, "<div>")?;
     writeln!(out, "NLL SCCs")?;
     writeln!(out, "<pre class='mermaid'>")?;
@@ -117,7 +132,11 @@ fn emit_polonius_dump<'tcx>(
         "<script src='https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js'></script>"
     )?;
     writeln!(out, "<script>")?;
-    writeln!(out, "mermaid.initialize({{ startOnLoad: false, maxEdges: 100 }});")?;
+    writeln!(
+        out,
+        "mermaid.initialize({{ startOnLoad: false, maxEdges: {} }});",
+        edge_count.max(100),
+    )?;
     writeln!(out, "mermaid.run({{ querySelector: '.mermaid' }})")?;
     writeln!(out, "</script>")?;
     writeln!(out, "</body>")?;
@@ -132,7 +151,7 @@ fn emit_html_mir<'tcx>(
     body: &Body<'tcx>,
     regioncx: &RegionInferenceContext<'tcx>,
     borrow_set: &BorrowSet<'tcx>,
-    localized_outlives_constraints: LocalizedOutlivesConstraintSet,
+    localized_outlives_constraints: &LocalizedOutlivesConstraintSet,
     closure_region_requirements: &Option<ClosureRegionRequirements<'tcx>>,
     out: &mut dyn io::Write,
 ) -> io::Result<()> {
@@ -160,7 +179,7 @@ fn emit_html_mir<'tcx>(
                 regioncx,
                 closure_region_requirements,
                 borrow_set,
-                &localized_outlives_constraints,
+                localized_outlives_constraints,
                 pass_where,
                 out,
             )
@@ -392,3 +411,76 @@ fn emit_mermaid_nll_sccs<'tcx>(
 
     Ok(())
 }
+
+/// Emits a mermaid flowchart of the polonius localized outlives constraints, with subgraphs per
+/// region, and loan introductions.
+fn emit_mermaid_constraint_graph<'tcx>(
+    borrow_set: &BorrowSet<'tcx>,
+    liveness: &LivenessValues,
+    localized_outlives_constraints: &LocalizedOutlivesConstraintSet,
+    out: &mut dyn io::Write,
+) -> io::Result<usize> {
+    let location_name = |location: Location| {
+        // A MIR location looks like `bb5[2]`. As that is not a syntactically valid mermaid node id,
+        // transform it into `BB5_2`.
+        format!("BB{}_{}", location.block.index(), location.statement_index)
+    };
+    let region_name = |region: RegionVid| format!("'{}", region.index());
+    let node_name = |region: RegionVid, point: PointIndex| {
+        let location = liveness.location_from_point(point);
+        format!("{}_{}", region_name(region), location_name(location))
+    };
+
+    // The mermaid chart type: a top-down flowchart, which supports subgraphs.
+    writeln!(out, "flowchart TD")?;
+
+    // The loans subgraph: a node per loan.
+    writeln!(out, "    subgraph \"Loans\"")?;
+    for loan_idx in 0..borrow_set.len() {
+        writeln!(out, "        L{loan_idx}")?;
+    }
+    writeln!(out, "    end\n")?;
+
+    // And an edge from that loan node to where it enters the constraint graph.
+    for (loan_idx, loan) in borrow_set.iter_enumerated() {
+        writeln!(
+            out,
+            "    L{} --> {}_{}",
+            loan_idx.index(),
+            region_name(loan.region),
+            location_name(loan.reserve_location),
+        )?;
+    }
+    writeln!(out, "")?;
+
+    // The regions subgraphs containing the region/point nodes.
+    let mut points_per_region: FxIndexMap<RegionVid, FxIndexSet<PointIndex>> =
+        FxIndexMap::default();
+    for constraint in &localized_outlives_constraints.outlives {
+        points_per_region.entry(constraint.source).or_default().insert(constraint.from);
+        points_per_region.entry(constraint.target).or_default().insert(constraint.to);
+    }
+    for (region, points) in points_per_region {
+        writeln!(out, "    subgraph \"{}\"", region_name(region))?;
+        for point in points {
+            writeln!(out, "        {}", node_name(region, point))?;
+        }
+        writeln!(out, "    end\n")?;
+    }
+
+    // The constraint graph edges.
+    for constraint in &localized_outlives_constraints.outlives {
+        // FIXME: add killed loans and constraint kind as edge labels.
+        writeln!(
+            out,
+            "    {} --> {}",
+            node_name(constraint.source, constraint.from),
+            node_name(constraint.target, constraint.to),
+        )?;
+    }
+
+    // Return the number of edges: this is the biggest graph in the dump and its edge count will be
+    // mermaid's max edge count to support.
+    let edge_count = borrow_set.len() + localized_outlives_constraints.outlives.len();
+    Ok(edge_count)
+}
diff --git a/compiler/rustc_codegen_gcc/tests/run/int.rs b/compiler/rustc_codegen_gcc/tests/run/int.rs
index bfe73c38435..58a26801b67 100644
--- a/compiler/rustc_codegen_gcc/tests/run/int.rs
+++ b/compiler/rustc_codegen_gcc/tests/run/int.rs
@@ -3,8 +3,6 @@
 // Run-time:
 //   status: 0
 
-#![feature(const_black_box)]
-
 /*
  * Code
  */
diff --git a/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs b/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs
index 72baf5c4b58..d67b9d33596 100644
--- a/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs
+++ b/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs
@@ -12,13 +12,11 @@ use std::ops::ControlFlow;
 
 use rustc_ast::visit::walk_list;
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
-use rustc_data_structures::sorted_map::SortedMap;
 use rustc_errors::ErrorGuaranteed;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::intravisit::{self, InferKind, Visitor, VisitorExt};
 use rustc_hir::{
-    self as hir, AmbigArg, GenericArg, GenericParam, GenericParamKind, HirId, ItemLocalMap,
-    LifetimeName, Node,
+    self as hir, AmbigArg, GenericArg, GenericParam, GenericParamKind, HirId, LifetimeName, Node,
 };
 use rustc_macros::extension;
 use rustc_middle::hir::nested_filter;
@@ -26,7 +24,7 @@ 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, LocalDefId, LocalDefIdMap};
+use rustc_span::def_id::{DefId, LocalDefId};
 use rustc_span::{Ident, Span, sym};
 use tracing::{debug, debug_span, instrument};
 
@@ -62,33 +60,9 @@ impl ResolvedArg {
     }
 }
 
-/// Maps the id of each bound variable reference to the variable decl
-/// that it corresponds to.
-///
-/// FIXME. This struct gets converted to a `ResolveBoundVars` for
-/// actual use. It has the same data, but indexed by `LocalDefId`. This
-/// is silly.
-#[derive(Debug, Default)]
-struct NamedVarMap {
-    // maps from every use of a named (not anonymous) bound var to a
-    // `ResolvedArg` describing how that variable is bound
-    defs: ItemLocalMap<ResolvedArg>,
-
-    // Maps relevant hir items to the bound vars on them. These include:
-    // - function defs
-    // - function pointers
-    // - closures
-    // - trait refs
-    // - bound types (like `T` in `for<'a> T<'a>: Foo`)
-    late_bound_vars: ItemLocalMap<Vec<ty::BoundVariableKind>>,
-
-    // List captured variables for each opaque type.
-    opaque_captured_lifetimes: LocalDefIdMap<Vec<(ResolvedArg, LocalDefId)>>,
-}
-
 struct BoundVarContext<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,
-    map: &'a mut NamedVarMap,
+    rbv: &'a mut ResolveBoundVars,
     scope: ScopeRef<'a>,
 }
 
@@ -267,19 +241,12 @@ pub(crate) fn provide(providers: &mut Providers) {
 
 /// Computes the `ResolveBoundVars` map that contains data for an entire `Item`.
 /// You should not read the result of this query directly, but rather use
-/// `named_variable_map`, `is_late_bound_map`, etc.
+/// `named_variable_map`, `late_bound_vars_map`, etc.
 #[instrument(level = "debug", skip(tcx))]
 fn resolve_bound_vars(tcx: TyCtxt<'_>, local_def_id: hir::OwnerId) -> ResolveBoundVars {
-    let mut named_variable_map = NamedVarMap {
-        defs: Default::default(),
-        late_bound_vars: Default::default(),
-        opaque_captured_lifetimes: Default::default(),
-    };
-    let mut visitor = BoundVarContext {
-        tcx,
-        map: &mut named_variable_map,
-        scope: &Scope::Root { opt_parent_item: None },
-    };
+    let mut rbv = ResolveBoundVars::default();
+    let mut visitor =
+        BoundVarContext { tcx, rbv: &mut rbv, scope: &Scope::Root { opt_parent_item: None } };
     match tcx.hir_owner_node(local_def_id) {
         hir::OwnerNode::Item(item) => visitor.visit_item(item),
         hir::OwnerNode::ForeignItem(item) => visitor.visit_foreign_item(item),
@@ -299,19 +266,10 @@ fn resolve_bound_vars(tcx: TyCtxt<'_>, local_def_id: hir::OwnerId) -> ResolveBou
         hir::OwnerNode::Synthetic => unreachable!(),
     }
 
-    let defs = named_variable_map.defs.into_sorted_stable_ord();
-    let late_bound_vars = named_variable_map.late_bound_vars.into_sorted_stable_ord();
-    let opaque_captured_lifetimes = named_variable_map.opaque_captured_lifetimes;
-    let rl = ResolveBoundVars {
-        defs: SortedMap::from_presorted_elements(defs),
-        late_bound_vars: SortedMap::from_presorted_elements(late_bound_vars),
-        opaque_captured_lifetimes,
-    };
-
-    debug!(?rl.defs);
-    debug!(?rl.late_bound_vars);
-    debug!(?rl.opaque_captured_lifetimes);
-    rl
+    debug!(?rbv.defs);
+    debug!(?rbv.late_bound_vars);
+    debug!(?rbv.opaque_captured_lifetimes);
+    rbv
 }
 
 fn late_arg_as_bound_arg<'tcx>(
@@ -404,7 +362,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                 Scope::Binder { hir_id, .. } => {
                     // Nested poly trait refs have the binders concatenated
                     let mut full_binders =
-                        self.map.late_bound_vars.entry(hir_id.local_id).or_default().clone();
+                        self.rbv.late_bound_vars.get_mut_or_insert_default(hir_id.local_id).clone();
                     full_binders.extend(supertrait_bound_vars);
                     break (full_binders, BinderScopeType::Concatenating);
                 }
@@ -646,7 +604,7 @@ impl<'a, 'tcx> Visitor<'tcx> for BoundVarContext<'a, 'tcx> {
 
         let captures = captures.into_inner().into_iter().collect();
         debug!(?captures);
-        self.map.opaque_captured_lifetimes.insert(opaque.def_id, captures);
+        self.rbv.opaque_captured_lifetimes.insert(opaque.def_id, captures);
     }
 
     #[instrument(level = "debug", skip(self))]
@@ -848,7 +806,7 @@ impl<'a, 'tcx> Visitor<'tcx> for BoundVarContext<'a, 'tcx> {
             hir::TyKind::Ref(lifetime_ref, ref mt) => {
                 self.visit_lifetime(lifetime_ref);
                 let scope = Scope::ObjectLifetimeDefault {
-                    lifetime: self.map.defs.get(&lifetime_ref.hir_id.local_id).cloned(),
+                    lifetime: self.rbv.defs.get(&lifetime_ref.hir_id.local_id).cloned(),
                     s: self.scope,
                 };
                 self.with(scope, |this| this.visit_ty_unambig(mt.ty));
@@ -966,7 +924,7 @@ impl<'a, 'tcx> Visitor<'tcx> for BoundVarContext<'a, 'tcx> {
             let bound_vars: Vec<_> =
                 self.tcx.fn_sig(sig_id).skip_binder().bound_vars().iter().collect();
             let hir_id = self.tcx.local_def_id_to_hir_id(def_id);
-            self.map.late_bound_vars.insert(hir_id.local_id, bound_vars);
+            self.rbv.late_bound_vars.insert(hir_id.local_id, bound_vars);
         }
         self.visit_fn_like_elision(fd.inputs, output, matches!(fk, intravisit::FnKind::Closure));
         intravisit::walk_fn_kind(self, fk);
@@ -1140,8 +1098,8 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
     where
         F: for<'b> FnOnce(&mut BoundVarContext<'b, 'tcx>),
     {
-        let BoundVarContext { tcx, map, .. } = self;
-        let mut this = BoundVarContext { tcx: *tcx, map, scope: &wrap_scope };
+        let BoundVarContext { tcx, rbv, .. } = self;
+        let mut this = BoundVarContext { tcx: *tcx, rbv, scope: &wrap_scope };
         let span = debug_span!("scope", scope = ?this.scope.debug_truncated());
         {
             let _enter = span.enter();
@@ -1150,10 +1108,10 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
     }
 
     fn record_late_bound_vars(&mut self, hir_id: HirId, binder: Vec<ty::BoundVariableKind>) {
-        if let Some(old) = self.map.late_bound_vars.insert(hir_id.local_id, binder) {
+        if let Some(old) = self.rbv.late_bound_vars.insert(hir_id.local_id, binder) {
             bug!(
                 "overwrote bound vars for {hir_id:?}:\nold={old:?}\nnew={:?}",
-                self.map.late_bound_vars[&hir_id.local_id]
+                self.rbv.late_bound_vars[&hir_id.local_id]
             )
         }
     }
@@ -1597,9 +1555,9 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                         kind.descr(param_def_id.to_def_id())
                     ),
                 };
-                self.map.defs.insert(hir_id.local_id, ResolvedArg::Error(guar));
+                self.rbv.defs.insert(hir_id.local_id, ResolvedArg::Error(guar));
             } else {
-                self.map.defs.insert(hir_id.local_id, def);
+                self.rbv.defs.insert(hir_id.local_id, def);
             }
             return;
         }
@@ -1632,7 +1590,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                             bug!("unexpected def-kind: {}", kind.descr(param_def_id.to_def_id()))
                         }
                     });
-                    self.map.defs.insert(hir_id.local_id, ResolvedArg::Error(guar));
+                    self.rbv.defs.insert(hir_id.local_id, ResolvedArg::Error(guar));
                     return;
                 }
                 Scope::Root { .. } => break,
@@ -1725,7 +1683,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                 }
             };
 
-            let map = &self.map;
+            let rbv = &self.rbv;
             let generics = self.tcx.generics_of(def_id);
 
             // `type_def_id` points to an item, so there is nothing to inherit generics from.
@@ -1744,7 +1702,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
                     // This index can be used with `generic_args` since `parent_count == 0`.
                     let index = generics.param_def_id_to_index[&param_def_id] as usize;
                     generic_args.args.get(index).and_then(|arg| match arg {
-                        GenericArg::Lifetime(lt) => map.defs.get(&lt.hir_id.local_id).copied(),
+                        GenericArg::Lifetime(lt) => rbv.defs.get(&lt.hir_id.local_id).copied(),
                         _ => None,
                     })
                 }
@@ -2042,7 +2000,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
     #[instrument(level = "debug", skip(self))]
     fn insert_lifetime(&mut self, lifetime_ref: &'tcx hir::Lifetime, def: ResolvedArg) {
         debug!(span = ?lifetime_ref.ident.span);
-        self.map.defs.insert(lifetime_ref.hir_id.local_id, def);
+        self.rbv.defs.insert(lifetime_ref.hir_id.local_id, def);
     }
 
     // When we have a return type notation type in a where clause, like
@@ -2197,7 +2155,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
         // See where these vars are used in `HirTyLowerer::lower_ty_maybe_return_type_notation`.
         // And this is exercised in:
         // `tests/ui/associated-type-bounds/return-type-notation/higher-ranked-bound-works.rs`.
-        let existing_bound_vars = self.map.late_bound_vars.get_mut(&hir_id.local_id).unwrap();
+        let existing_bound_vars = self.rbv.late_bound_vars.get_mut(&hir_id.local_id).unwrap();
         let existing_bound_vars_saved = existing_bound_vars.clone();
         existing_bound_vars.extend(bound_vars);
         self.record_late_bound_vars(item_segment.hir_id, existing_bound_vars_saved);
diff --git a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
index 35186778671..545422682f0 100644
--- a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
@@ -319,7 +319,11 @@ static Attribute::AttrKind fromRust(LLVMRustAttributeKind Kind) {
   case LLVMRustAttributeKind::NoAlias:
     return Attribute::NoAlias;
   case LLVMRustAttributeKind::NoCapture:
+#if LLVM_VERSION_GE(21, 0)
+    report_fatal_error("NoCapture doesn't exist in LLVM 21");
+#else
     return Attribute::NoCapture;
+#endif
   case LLVMRustAttributeKind::NoCfCheck:
     return Attribute::NoCfCheck;
   case LLVMRustAttributeKind::NoInline:
@@ -431,6 +435,12 @@ extern "C" void LLVMRustEraseInstFromParent(LLVMValueRef Instr) {
 
 extern "C" LLVMAttributeRef
 LLVMRustCreateAttrNoValue(LLVMContextRef C, LLVMRustAttributeKind RustAttr) {
+#if LLVM_VERSION_GE(21, 0)
+  // LLVM 21 replaced the NoCapture attribute with Captures(none).
+  if (RustAttr == LLVMRustAttributeKind::NoCapture) {
+    return wrap(Attribute::getWithCaptureInfo(*unwrap(C), CaptureInfo::none()));
+  }
+#endif
   return wrap(Attribute::get(*unwrap(C), fromRust(RustAttr)));
 }
 
diff --git a/compiler/rustc_middle/src/middle/resolve_bound_vars.rs b/compiler/rustc_middle/src/middle/resolve_bound_vars.rs
index 111ac990bc7..51a079e8bc1 100644
--- a/compiler/rustc_middle/src/middle/resolve_bound_vars.rs
+++ b/compiler/rustc_middle/src/middle/resolve_bound_vars.rs
@@ -45,15 +45,22 @@ pub enum ObjectLifetimeDefault {
     Param(DefId),
 }
 
-/// Maps the id of each lifetime reference to the lifetime decl
+/// Maps the id of each bound variable reference to the variable decl
 /// that it corresponds to.
-#[derive(HashStable, Debug)]
+#[derive(Debug, Default, HashStable)]
 pub struct ResolveBoundVars {
-    /// Maps from every use of a named (not anonymous) lifetime to a
-    /// `Region` describing how that region is bound
+    // Maps from every use of a named (not anonymous) bound var to a
+    // `ResolvedArg` describing how that variable is bound.
     pub defs: SortedMap<ItemLocalId, ResolvedArg>,
 
+    // Maps relevant hir items to the bound vars on them. These include:
+    // - function defs
+    // - function pointers
+    // - closures
+    // - trait refs
+    // - bound types (like `T` in `for<'a> T<'a>: Foo`)
     pub late_bound_vars: SortedMap<ItemLocalId, Vec<ty::BoundVariableKind>>,
 
+    // List captured variables for each opaque type.
     pub opaque_captured_lifetimes: LocalDefIdMap<Vec<(ResolvedArg, LocalDefId)>>,
 }
diff --git a/library/core/src/hint.rs b/library/core/src/hint.rs
index 80f6e32b6b2..e5c1a64c12e 100644
--- a/library/core/src/hint.rs
+++ b/library/core/src/hint.rs
@@ -468,9 +468,11 @@ pub fn spin_loop() {
 /// // No assumptions can be made about either operand, so the multiplication is not optimized out.
 /// let y = black_box(5) * black_box(10);
 /// ```
+///
+/// During constant evaluation, `black_box` is treated as a no-op.
 #[inline]
 #[stable(feature = "bench_black_box", since = "1.66.0")]
-#[rustc_const_unstable(feature = "const_black_box", issue = "none")]
+#[rustc_const_stable(feature = "const_black_box", since = "CURRENT_RUSTC_VERSION")]
 pub const fn black_box<T>(dummy: T) -> T {
     crate::intrinsics::black_box(dummy)
 }
diff --git a/library/core/src/intrinsics/mod.rs b/library/core/src/intrinsics/mod.rs
index 41b2ffad668..c0d435f99c0 100644
--- a/library/core/src/intrinsics/mod.rs
+++ b/library/core/src/intrinsics/mod.rs
@@ -3725,6 +3725,7 @@ pub const unsafe fn compare_bytes(_left: *const u8, _right: *const u8, _bytes: u
 #[rustc_nounwind]
 #[rustc_intrinsic]
 #[rustc_intrinsic_must_be_overridden]
+#[rustc_intrinsic_const_stable_indirect]
 pub const fn black_box<T>(_dummy: T) -> T {
     unimplemented!()
 }
diff --git a/library/core/src/num/f128.rs b/library/core/src/num/f128.rs
index 8fb1588e60b..5e45974b3d4 100644
--- a/library/core/src/num/f128.rs
+++ b/library/core/src/num/f128.rs
@@ -670,7 +670,8 @@ impl f128 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for maxNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids maxNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmax.
+    /// This also matches the behavior of libm’s fmax. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// #![feature(f128)]
@@ -696,7 +697,8 @@ impl f128 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for minNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids minNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmin.
+    /// This also matches the behavior of libm’s fmin. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// #![feature(f128)]
diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs
index 8c2af74b8f8..e3176cd1688 100644
--- a/library/core/src/num/f16.rs
+++ b/library/core/src/num/f16.rs
@@ -662,7 +662,8 @@ impl f16 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for maxNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids maxNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmax.
+    /// This also matches the behavior of libm’s fmax. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// #![feature(f16)]
@@ -687,7 +688,8 @@ impl f16 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for minNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids minNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmin.
+    /// This also matches the behavior of libm’s fmin. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// #![feature(f16)]
diff --git a/library/core/src/num/f32.rs b/library/core/src/num/f32.rs
index 817bedbd44f..4d42997369f 100644
--- a/library/core/src/num/f32.rs
+++ b/library/core/src/num/f32.rs
@@ -874,7 +874,8 @@ impl f32 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for maxNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids maxNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmax.
+    /// This also matches the behavior of libm’s fmax. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// let x = 1.0f32;
@@ -895,7 +896,8 @@ impl f32 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for minNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids minNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmin.
+    /// This also matches the behavior of libm’s fmin. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// let x = 1.0f32;
diff --git a/library/core/src/num/f64.rs b/library/core/src/num/f64.rs
index 1b0651a0def..907971d303f 100644
--- a/library/core/src/num/f64.rs
+++ b/library/core/src/num/f64.rs
@@ -892,7 +892,8 @@ impl f64 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for maxNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids maxNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmax.
+    /// This also matches the behavior of libm’s fmax. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// let x = 1.0_f64;
@@ -913,7 +914,8 @@ impl f64 {
     /// If one of the arguments is NaN, then the other argument is returned.
     /// This follows the IEEE 754-2008 semantics for minNum, except for handling of signaling NaNs;
     /// this function handles all NaNs the same way and avoids minNum's problems with associativity.
-    /// This also matches the behavior of libm’s fmin.
+    /// This also matches the behavior of libm’s fmin. In particular, if the inputs compare equal
+    /// (such as for the case of `+0.0` and `-0.0`), either input may be returned non-deterministically.
     ///
     /// ```
     /// let x = 1.0_f64;
diff --git a/library/coretests/tests/lib.rs b/library/coretests/tests/lib.rs
index 0607d508a48..7fe72862608 100644
--- a/library/coretests/tests/lib.rs
+++ b/library/coretests/tests/lib.rs
@@ -14,7 +14,6 @@
 #![feature(bstr)]
 #![feature(cell_update)]
 #![feature(clone_to_uninit)]
-#![feature(const_black_box)]
 #![feature(const_eval_select)]
 #![feature(const_swap_nonoverlapping)]
 #![feature(const_trait_impl)]
diff --git a/src/ci/github-actions/jobs.yml b/src/ci/github-actions/jobs.yml
index c6bc19f9e6c..9af88709625 100644
--- a/src/ci/github-actions/jobs.yml
+++ b/src/ci/github-actions/jobs.yml
@@ -43,6 +43,10 @@ runners:
     os: windows-2022-8core-32gb
     <<: *base-job
 
+  - &job-windows-25-8c
+    os: windows-2025-8core-32gb
+    <<: *base-job
+
   - &job-aarch64-linux
     # Free some disk space to avoid running out of space during the build.
     free_disk: true
@@ -524,7 +528,7 @@ auto:
       # We are intentionally allowing an old toolchain on this builder (and that's
       # incompatible with LLVM downloads today).
       NO_DOWNLOAD_CI_LLVM: 1
-    <<: *job-windows-8c
+    <<: *job-windows-25-8c
 
   # x86_64-mingw is split into two jobs to run tests in parallel.
   - name: x86_64-mingw-1
diff --git a/tests/codegen/addr-of-mutate.rs b/tests/codegen/addr-of-mutate.rs
index f10f01274b1..14bc4b8ab28 100644
--- a/tests/codegen/addr-of-mutate.rs
+++ b/tests/codegen/addr-of-mutate.rs
@@ -5,7 +5,7 @@
 // Test for the absence of `readonly` on the argument when it is mutated via `&raw const`.
 // See <https://github.com/rust-lang/rust/issues/111502>.
 
-// CHECK: i8 @foo(ptr noalias nocapture noundef align 1 dereferenceable(128) %x)
+// CHECK: i8 @foo(ptr noalias{{( nocapture)?}} noundef align 1{{( captures\(none\))?}} dereferenceable(128) %x)
 #[no_mangle]
 pub fn foo(x: [u8; 128]) -> u8 {
     let ptr = core::ptr::addr_of!(x).cast_mut();
@@ -15,7 +15,7 @@ pub fn foo(x: [u8; 128]) -> u8 {
     x[0]
 }
 
-// CHECK: i1 @second(ptr noalias nocapture noundef align {{[0-9]+}} dereferenceable({{[0-9]+}}) %a_ptr_and_b)
+// CHECK: i1 @second(ptr noalias{{( nocapture)?}} noundef align {{[0-9]+}}{{( captures\(none\))?}} dereferenceable({{[0-9]+}}) %a_ptr_and_b)
 #[no_mangle]
 pub unsafe fn second(a_ptr_and_b: (*mut (i32, bool), (i64, bool))) -> bool {
     let b_bool_ptr = core::ptr::addr_of!(a_ptr_and_b.1.1).cast_mut();
@@ -24,7 +24,7 @@ pub unsafe fn second(a_ptr_and_b: (*mut (i32, bool), (i64, bool))) -> bool {
 }
 
 // If going through a deref (and there are no other mutating accesses), then `readonly` is fine.
-// CHECK: i1 @third(ptr noalias nocapture noundef readonly align {{[0-9]+}} dereferenceable({{[0-9]+}}) %a_ptr_and_b)
+// CHECK: i1 @third(ptr noalias{{( nocapture)?}} noundef readonly align {{[0-9]+}}{{( captures\(none\))?}} dereferenceable({{[0-9]+}}) %a_ptr_and_b)
 #[no_mangle]
 pub unsafe fn third(a_ptr_and_b: (*mut (i32, bool), (i64, bool))) -> bool {
     let b_bool_ptr = core::ptr::addr_of!((*a_ptr_and_b.0).1).cast_mut();
diff --git a/tests/codegen/cast-target-abi.rs b/tests/codegen/cast-target-abi.rs
index db76aae3dd0..b3a35cbf3b1 100644
--- a/tests/codegen/cast-target-abi.rs
+++ b/tests/codegen/cast-target-abi.rs
@@ -392,7 +392,7 @@ pub fn call_fiveu16s() {
 }
 
 // CHECK-LABEL: @return_fiveu16s
-// CHECK-SAME: (ptr {{.+}} sret([10 x i8]) align [[RUST_ALIGN:2]] dereferenceable(10) [[RET_PTR:%.+]])
+// CHECK-SAME: (ptr {{.+}} sret([10 x i8]) align [[RUST_ALIGN:2]] {{.*}}dereferenceable(10) [[RET_PTR:%.+]])
 #[no_mangle]
 pub fn return_fiveu16s() -> FiveU16s {
     // powerpc returns this struct via sret pointer, it doesn't use the cast ABI.
diff --git a/tests/codegen/function-arguments.rs b/tests/codegen/function-arguments.rs
index 503799d3ed2..1a211dfe096 100644
--- a/tests/codegen/function-arguments.rs
+++ b/tests/codegen/function-arguments.rs
@@ -135,7 +135,7 @@ pub fn mutable_notunpin_borrow(_: &mut NotUnpin) {}
 #[no_mangle]
 pub fn notunpin_borrow(_: &NotUnpin) {}
 
-// CHECK: @indirect_struct(ptr noalias nocapture noundef readonly align 4 dereferenceable(32) %_1)
+// CHECK: @indirect_struct(ptr noalias{{( nocapture)?}} noundef readonly align 4{{( captures\(none\))?}} dereferenceable(32) %_1)
 #[no_mangle]
 pub fn indirect_struct(_: S) {}
 
@@ -198,7 +198,7 @@ pub fn notunpin_box(x: Box<NotUnpin>) -> Box<NotUnpin> {
     x
 }
 
-// CHECK: @struct_return(ptr{{( dead_on_unwind)?}} noalias nocapture noundef{{( writable)?}} sret([32 x i8]) align 4 dereferenceable(32){{( %_0)?}})
+// CHECK: @struct_return(ptr{{( dead_on_unwind)?}} noalias{{( nocapture)?}} noundef{{( writable)?}} sret([32 x i8]) align 4{{( captures\(none\))?}} dereferenceable(32){{( %_0)?}})
 #[no_mangle]
 pub fn struct_return() -> S {
     S { _field: [0, 0, 0, 0, 0, 0, 0, 0] }
diff --git a/tests/codegen/i128-x86-align.rs b/tests/codegen/i128-x86-align.rs
index 6b1da445c40..ac101b72513 100644
--- a/tests/codegen/i128-x86-align.rs
+++ b/tests/codegen/i128-x86-align.rs
@@ -19,8 +19,10 @@ pub struct ScalarPair {
 #[no_mangle]
 pub fn load(x: &ScalarPair) -> ScalarPair {
     // CHECK-LABEL: @load(
-    // CHECK-SAME: sret([32 x i8]) align 16 dereferenceable(32) %_0,
-    // CHECK-SAME: align 16 dereferenceable(32) %x
+    // CHECK-SAME: sret([32 x i8]) align 16
+    // CHECK-SAME: dereferenceable(32) %_0,
+    // CHECK-SAME: align 16
+    // CHECK-SAME: dereferenceable(32) %x
     // CHECK:      [[A:%.*]] = load i32, ptr %x, align 16
     // CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr %x, i64 16
     // CHECK-NEXT: [[B:%.*]] = load i128, ptr [[GEP]], align 16
@@ -34,7 +36,8 @@ pub fn load(x: &ScalarPair) -> ScalarPair {
 #[no_mangle]
 pub fn store(x: &mut ScalarPair) {
     // CHECK-LABEL: @store(
-    // CHECK-SAME: align 16 dereferenceable(32) %x
+    // CHECK-SAME: align 16
+    // CHECK-SAME: dereferenceable(32) %x
     // CHECK:      store i32 1, ptr %x, align 16
     // CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr %x, i64 16
     // CHECK-NEXT: store i128 2, ptr [[GEP]], align 16
@@ -55,8 +58,10 @@ pub fn alloca() {
 #[no_mangle]
 pub fn load_volatile(x: &ScalarPair) -> ScalarPair {
     // CHECK-LABEL: @load_volatile(
-    // CHECK-SAME: sret([32 x i8]) align 16 dereferenceable(32) %_0,
-    // CHECK-SAME: align 16 dereferenceable(32) %x
+    // CHECK-SAME: sret([32 x i8]) align 16
+    // CHECK-SAME: dereferenceable(32) %_0,
+    // CHECK-SAME: align 16
+    // CHECK-SAME: dereferenceable(32) %x
     // CHECK:      [[LOAD:%.*]] = load volatile %ScalarPair, ptr %x, align 16
     // CHECK-NEXT: store %ScalarPair [[LOAD]], ptr %_0, align 16
     // CHECK-NEXT: ret void
@@ -66,7 +71,8 @@ pub fn load_volatile(x: &ScalarPair) -> ScalarPair {
 #[no_mangle]
 pub fn transmute(x: ScalarPair) -> (std::mem::MaybeUninit<i128>, i128) {
     // CHECK-LABEL: @transmute(
-    // CHECK-SAME:  sret([32 x i8]) align 16 dereferenceable(32) %_0,
+    // CHECK-SAME:  sret([32 x i8]) align 16
+    // CHECK-SAME:  dereferenceable(32) %_0,
     // CHECK-SAME:  i32 noundef %x.0, i128 noundef %x.1
     // CHECK:       store i32 %x.0, ptr %_0, align 16
     // CHECK-NEXT:  [[GEP:%.*]] = getelementptr inbounds i8, ptr %_0, i64 16
@@ -86,7 +92,8 @@ pub struct Struct {
 #[no_mangle]
 pub fn store_struct(x: &mut Struct) {
     // CHECK-LABEL: @store_struct(
-    // CHECK-SAME: align 16 dereferenceable(32) %x
+    // CHECK-SAME: align 16
+    // CHECK-SAME: dereferenceable(32) %x
     // CHECK:      [[TMP:%.*]] = alloca [32 x i8], align 16
     // CHECK:      store i32 1, ptr [[TMP]], align 16
     // CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i8, ptr [[TMP]], i64 4
diff --git a/tests/codegen/loongarch-abi/loongarch64-lp64d-abi.rs b/tests/codegen/loongarch-abi/loongarch64-lp64d-abi.rs
index cba1a980caa..b147d01b38e 100644
--- a/tests/codegen/loongarch-abi/loongarch64-lp64d-abi.rs
+++ b/tests/codegen/loongarch-abi/loongarch64-lp64d-abi.rs
@@ -259,11 +259,11 @@ pub struct IntDoubleInt {
     c: i32,
 }
 
-// CHECK: define void @f_int_double_int_s_arg(ptr noalias nocapture noundef align 8 dereferenceable(24) %a)
+// CHECK: define void @f_int_double_int_s_arg(ptr noalias{{( nocapture)?}} noundef align 8{{( captures\(none\))?}} dereferenceable(24) %a)
 #[no_mangle]
 pub extern "C" fn f_int_double_int_s_arg(a: IntDoubleInt) {}
 
-// CHECK: define void @f_ret_int_double_int_s(ptr{{( dead_on_unwind)?}} noalias nocapture noundef{{( writable)?}} sret([24 x i8]) align 8 dereferenceable(24) %_0)
+// CHECK: define void @f_ret_int_double_int_s(ptr{{( dead_on_unwind)?}} noalias{{( nocapture)?}} noundef{{( writable)?}} sret([24 x i8]) align 8{{( captures\(none\))?}} dereferenceable(24) %_0)
 #[no_mangle]
 pub extern "C" fn f_ret_int_double_int_s() -> IntDoubleInt {
     IntDoubleInt { a: 1, b: 2., c: 3 }
diff --git a/tests/codegen/packed.rs b/tests/codegen/packed.rs
index 790d618b2ea..66df978d48c 100644
--- a/tests/codegen/packed.rs
+++ b/tests/codegen/packed.rs
@@ -52,7 +52,7 @@ pub struct BigPacked2 {
 #[no_mangle]
 pub fn call_pkd1(f: fn() -> Array) -> BigPacked1 {
     // CHECK: [[ALLOCA:%[_a-z0-9]+]] = alloca [32 x i8]
-    // CHECK: call void %{{.*}}(ptr noalias nocapture noundef sret{{.*}} dereferenceable(32) [[ALLOCA]])
+    // CHECK: call void %{{.*}}(ptr{{( captures(none))?}} noalias{{( nocapture)?}} noundef sret{{.*}} dereferenceable(32) [[ALLOCA]])
     // CHECK: call void @llvm.memcpy.{{.*}}(ptr align 1 %{{.*}}, ptr align 4 %{{.*}}, i{{[0-9]+}} 32, i1 false)
     // check that calls whose destination is a field of a packed struct
     // go through an alloca rather than calling the function with an
@@ -64,7 +64,7 @@ pub fn call_pkd1(f: fn() -> Array) -> BigPacked1 {
 #[no_mangle]
 pub fn call_pkd2(f: fn() -> Array) -> BigPacked2 {
     // CHECK: [[ALLOCA:%[_a-z0-9]+]] = alloca [32 x i8]
-    // CHECK: call void %{{.*}}(ptr noalias nocapture noundef sret{{.*}} dereferenceable(32) [[ALLOCA]])
+    // CHECK: call void %{{.*}}(ptr{{( captures(none))?}} noalias{{( nocapture)?}} noundef sret{{.*}} dereferenceable(32) [[ALLOCA]])
     // CHECK: call void @llvm.memcpy.{{.*}}(ptr align 2 %{{.*}}, ptr align 4 %{{.*}}, i{{[0-9]+}} 32, i1 false)
     // check that calls whose destination is a field of a packed struct
     // go through an alloca rather than calling the function with an
diff --git a/tests/codegen/riscv-abi/riscv64-lp64d-abi.rs b/tests/codegen/riscv-abi/riscv64-lp64d-abi.rs
index bcd9b0eae71..c14d5c01450 100644
--- a/tests/codegen/riscv-abi/riscv64-lp64d-abi.rs
+++ b/tests/codegen/riscv-abi/riscv64-lp64d-abi.rs
@@ -263,7 +263,7 @@ pub struct IntDoubleInt {
 #[no_mangle]
 pub extern "C" fn f_int_double_int_s_arg(a: IntDoubleInt) {}
 
-// CHECK: define void @f_ret_int_double_int_s(ptr {{.*}} sret([24 x i8]) align 8 dereferenceable(24) %_0)
+// CHECK: define void @f_ret_int_double_int_s(ptr {{.*}} sret([24 x i8]) align 8 {{.*}}dereferenceable(24) %_0)
 #[no_mangle]
 pub extern "C" fn f_ret_int_double_int_s() -> IntDoubleInt {
     IntDoubleInt { a: 1, b: 2., c: 3 }
diff --git a/tests/rustdoc/intra-doc/auxiliary/issue-103463-aux.rs b/tests/rustdoc-ui/intra-doc/auxiliary/issue-103463-aux.rs
index 2b8fdec1f12..2b8fdec1f12 100644
--- a/tests/rustdoc/intra-doc/auxiliary/issue-103463-aux.rs
+++ b/tests/rustdoc-ui/intra-doc/auxiliary/issue-103463-aux.rs
diff --git a/tests/rustdoc/intra-doc/issue-104145.rs b/tests/rustdoc-ui/intra-doc/ice-extern-trait-local-impl-104145.rs
index 5690803af5a..0e403b21c8a 100644
--- a/tests/rustdoc/intra-doc/issue-104145.rs
+++ b/tests/rustdoc-ui/intra-doc/ice-extern-trait-local-impl-104145.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/104145
+//@ check-pass
+
 // Doc links in `Trait`'s methods are resolved because it has a local impl.
 
 //@ aux-build:issue-103463-aux.rs
diff --git a/tests/rustdoc/intra-doc/issue-103463.rs b/tests/rustdoc-ui/intra-doc/ice-priv-use-103463.rs
index 9b5cb67fd32..10894282e55 100644
--- a/tests/rustdoc/intra-doc/issue-103463.rs
+++ b/tests/rustdoc-ui/intra-doc/ice-priv-use-103463.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/103463
+//@ check-pass
+
 // The `Trait` is not pulled into the crate resulting in doc links in its methods being resolved.
 
 //@ aux-build:issue-103463-aux.rs
diff --git a/tests/rustdoc/inline_cross/issue-28480.rs b/tests/rustdoc/inline_cross/doc-hidden-broken-link-28480.rs
index 004510fd922..e1ca7403c03 100644
--- a/tests/rustdoc/inline_cross/issue-28480.rs
+++ b/tests/rustdoc/inline_cross/doc-hidden-broken-link-28480.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/28480
+#![crate_name="foobar"]
+
 //@ aux-build:rustdoc-hidden-sig.rs
 //@ build-aux-docs
 //@ ignore-cross-compile
@@ -7,7 +10,7 @@
 //@ has -  '//a' 'u8'
 extern crate rustdoc_hidden_sig;
 
-//@ has issue_28480/struct.Bar.html
+//@ has foobar/struct.Bar.html
 //@ !has -  '//a/@title' 'Hidden'
 //@ has -  '//a' 'u8'
 pub use rustdoc_hidden_sig::Bar;
diff --git a/tests/rustdoc/inline_cross/issue-31948-1.rs b/tests/rustdoc/inline_cross/doc-reachability-impl-31948-1.rs
index e59da87c29d..baab1da9547 100644
--- a/tests/rustdoc/inline_cross/issue-31948-1.rs
+++ b/tests/rustdoc/inline_cross/doc-reachability-impl-31948-1.rs
@@ -1,27 +1,30 @@
+// https://github.com/rust-lang/rust/issues/31948
+#![crate_name="foobar"]
+
 //@ aux-build:rustdoc-nonreachable-impls.rs
 //@ build-aux-docs
 //@ ignore-cross-compile
 
 extern crate rustdoc_nonreachable_impls;
 
-//@ has issue_31948_1/struct.Wobble.html
+//@ has foobar/struct.Wobble.html
 //@ has - '//*[@class="impl"]//h3[@class="code-header"]' 'Bark for'
 //@ has - '//*[@class="impl"]//h3[@class="code-header"]' 'Woof for'
 //@ !has - '//*[@class="impl"]//h3[@class="code-header"]' 'Bar for'
 //@ !has - '//*[@class="impl"]//h3[@class="code-header"]' 'Qux for'
 pub use rustdoc_nonreachable_impls::hidden::Wobble;
 
-//@ has issue_31948_1/trait.Bark.html
+//@ has foobar/trait.Bark.html
 //@ has - '//h3[@class="code-header"]' 'for Foo'
 //@ has - '//h3[@class="code-header"]' 'for Wobble'
 //@ !has - '//h3[@class="code-header"]' 'for Wibble'
 pub use rustdoc_nonreachable_impls::Bark;
 
-//@ has issue_31948_1/trait.Woof.html
+//@ has foobar/trait.Woof.html
 //@ has - '//h3[@class="code-header"]' 'for Foo'
 //@ has - '//h3[@class="code-header"]' 'for Wobble'
 //@ !has - '//h3[@class="code-header"]' 'for Wibble'
 pub use rustdoc_nonreachable_impls::Woof;
 
-//@ !has issue_31948_1/trait.Bar.html
-//@ !has issue_31948_1/trait.Qux.html
+//@ !has foobar/trait.Bar.html
+//@ !has foobar/trait.Qux.html
diff --git a/tests/rustdoc/inline_cross/issue-31948-2.rs b/tests/rustdoc/inline_cross/doc-reachability-impl-31948-2.rs
index 34b57052883..40e9108ec62 100644
--- a/tests/rustdoc/inline_cross/issue-31948-2.rs
+++ b/tests/rustdoc/inline_cross/doc-reachability-impl-31948-2.rs
@@ -1,21 +1,24 @@
+// https://github.com/rust-lang/rust/issues/31948
+#![crate_name="foobar"]
+
 //@ aux-build:rustdoc-nonreachable-impls.rs
 //@ build-aux-docs
 //@ ignore-cross-compile
 
 extern crate rustdoc_nonreachable_impls;
 
-//@ has issue_31948_2/struct.Wobble.html
+//@ has foobar/struct.Wobble.html
 //@ has - '//*[@class="impl"]//h3[@class="code-header"]' 'Qux for'
 //@ has - '//*[@class="impl"]//h3[@class="code-header"]' 'Bark for'
 //@ has - '//*[@class="impl"]//h3[@class="code-header"]' 'Woof for'
 //@ !has - '//*[@class="impl"]//h3[@class="code-header"]' 'Bar for'
 pub use rustdoc_nonreachable_impls::hidden::Wobble;
 
-//@ has issue_31948_2/trait.Qux.html
+//@ has foobar/trait.Qux.html
 //@ has - '//h3[@class="code-header"]' 'for Foo'
 //@ has - '//h3[@class="code-header"]' 'for Wobble'
 pub use rustdoc_nonreachable_impls::hidden::Qux;
 
-//@ !has issue_31948_2/trait.Bar.html
-//@ !has issue_31948_2/trait.Woof.html
-//@ !has issue_31948_2/trait.Bark.html
+//@ !has foobar/trait.Bar.html
+//@ !has foobar/trait.Woof.html
+//@ !has foobar/trait.Bark.html
diff --git a/tests/rustdoc/inline_cross/issue-31948.rs b/tests/rustdoc/inline_cross/doc-reachability-impl-31948.rs
index 7a43fc7b279..ab0048513c7 100644
--- a/tests/rustdoc/inline_cross/issue-31948.rs
+++ b/tests/rustdoc/inline_cross/doc-reachability-impl-31948.rs
@@ -1,29 +1,32 @@
+// https://github.com/rust-lang/rust/issues/31948
+#![crate_name="foobar"]
+
 //@ aux-build:rustdoc-nonreachable-impls.rs
 //@ build-aux-docs
 //@ ignore-cross-compile
 
 extern crate rustdoc_nonreachable_impls;
 
-//@ has issue_31948/struct.Foo.html
+//@ has foobar/struct.Foo.html
 //@ has - '//*[@class="impl"]//h3[@class="code-header"]' 'Bark for'
 //@ has - '//*[@class="impl"]//h3[@class="code-header"]' 'Woof for'
 //@ !has - '//*[@class="impl"]//h3[@class="code-header"]' 'Bar for'
 //@ !has - '//*[@class="impl"]//h3[@class="code-header"]' 'Qux for'
 pub use rustdoc_nonreachable_impls::Foo;
 
-//@ has issue_31948/trait.Bark.html
+//@ has foobar/trait.Bark.html
 //@ has - '//h3[@class="code-header"]' 'for Foo'
 //@ !has - '//h3[@class="code-header"]' 'for Wibble'
 //@ !has - '//h3[@class="code-header"]' 'for Wobble'
 pub use rustdoc_nonreachable_impls::Bark;
 
-//@ has issue_31948/trait.Woof.html
+//@ has foobar/trait.Woof.html
 //@ has - '//h3[@class="code-header"]' 'for Foo'
 //@ !has - '//h3[@class="code-header"]' 'for Wibble'
 //@ !has - '//h3[@class="code-header"]' 'for Wobble'
 pub use rustdoc_nonreachable_impls::Woof;
 
-//@ !has issue_31948/trait.Bar.html
-//@ !has issue_31948/trait.Qux.html
-//@ !has issue_31948/struct.Wibble.html
-//@ !has issue_31948/struct.Wobble.html
+//@ !has foobar/trait.Bar.html
+//@ !has foobar/trait.Qux.html
+//@ !has foobar/struct.Wibble.html
+//@ !has foobar/struct.Wobble.html
diff --git a/tests/rustdoc/inline_cross/issue-32881.rs b/tests/rustdoc/inline_cross/impl-dyn-trait-32881.rs
index d4ebf10a1ca..f7dc7414455 100644
--- a/tests/rustdoc/inline_cross/issue-32881.rs
+++ b/tests/rustdoc/inline_cross/impl-dyn-trait-32881.rs
@@ -1,10 +1,13 @@
+// https://github.com/rust-lang/rust/issues/32881
+#![crate_name="foobar"]
+
 //@ aux-build:rustdoc-trait-object-impl.rs
 //@ build-aux-docs
 //@ ignore-cross-compile
 
 extern crate rustdoc_trait_object_impl;
 
-//@ has issue_32881/trait.Bar.html
+//@ has foobar/trait.Bar.html
 //@ has - '//h3[@class="code-header"]' "impl<'a> dyn Bar"
 //@ has - '//h3[@class="code-header"]' "impl<'a> Debug for dyn Bar"
 
diff --git a/tests/rustdoc/inline_cross/issue-33113.rs b/tests/rustdoc/inline_cross/impl-ref-33113.rs
index 05e87d962cb..9ac4f02e00c 100644
--- a/tests/rustdoc/inline_cross/issue-33113.rs
+++ b/tests/rustdoc/inline_cross/impl-ref-33113.rs
@@ -1,10 +1,13 @@
+// https://github.com/rust-lang/rust/issues/33113
+#![crate_name="foobar"]
+
 //@ aux-build:issue-33113.rs
 //@ build-aux-docs
 //@ ignore-cross-compile
 
 extern crate bar;
 
-//@ has issue_33113/trait.Bar.html
+//@ has foobar/trait.Bar.html
 //@ has - '//h3[@class="code-header"]' "for &'a char"
 //@ has - '//h3[@class="code-header"]' "for Foo"
 pub use bar::Bar;
diff --git a/tests/rustdoc/inline_cross/issue-76736-1.rs b/tests/rustdoc/inline_cross/rustc-private-76736-1.rs
index fe52702fd6f..3ffa5e6cc06 100644
--- a/tests/rustdoc/inline_cross/issue-76736-1.rs
+++ b/tests/rustdoc/inline_cross/rustc-private-76736-1.rs
@@ -1,3 +1,5 @@
+// https://github.com/rust-lang/rust/issues/76736
+
 //@ aux-build:issue-76736-1.rs
 //@ aux-build:issue-76736-2.rs
 
diff --git a/tests/rustdoc/inline_cross/issue-76736-2.rs b/tests/rustdoc/inline_cross/rustc-private-76736-2.rs
index df376ebe9a1..843b2941602 100644
--- a/tests/rustdoc/inline_cross/issue-76736-2.rs
+++ b/tests/rustdoc/inline_cross/rustc-private-76736-2.rs
@@ -1,3 +1,5 @@
+// https://github.com/rust-lang/rust/issues/76736
+
 //@ aux-build:issue-76736-1.rs
 //@ aux-build:issue-76736-2.rs
 
diff --git a/tests/rustdoc/inline_cross/issue-76736-3.rs b/tests/rustdoc/inline_cross/rustc-private-76736-3.rs
index 1bed4621c04..f9b46caa02f 100644
--- a/tests/rustdoc/inline_cross/issue-76736-3.rs
+++ b/tests/rustdoc/inline_cross/rustc-private-76736-3.rs
@@ -1,3 +1,5 @@
+// https://github.com/rust-lang/rust/issues/76736
+
 //@ compile-flags: -Zforce-unstable-if-unmarked
 //@ aux-build:issue-76736-1.rs
 //@ aux-build:issue-76736-2.rs
diff --git a/tests/rustdoc/inline_cross/issue-76736-4.rs b/tests/rustdoc/inline_cross/rustc-private-76736-4.rs
index 487e9030108..511464f2c49 100644
--- a/tests/rustdoc/inline_cross/issue-76736-4.rs
+++ b/tests/rustdoc/inline_cross/rustc-private-76736-4.rs
@@ -1,3 +1,5 @@
+// https://github.com/rust-lang/rust/issues/76736
+
 //@ aux-build:issue-76736-1.rs
 //@ aux-build:issue-76736-2.rs
 
diff --git a/tests/rustdoc/inline_cross/issue-24183.method_no_where_self_sized.html b/tests/rustdoc/inline_cross/self-sized-bounds-24183.method_no_where_self_sized.html
index f3c1c045202..f3c1c045202 100644
--- a/tests/rustdoc/inline_cross/issue-24183.method_no_where_self_sized.html
+++ b/tests/rustdoc/inline_cross/self-sized-bounds-24183.method_no_where_self_sized.html
diff --git a/tests/rustdoc/inline_cross/issue-24183.rs b/tests/rustdoc/inline_cross/self-sized-bounds-24183.rs
index 8299eecc575..909005532f5 100644
--- a/tests/rustdoc/inline_cross/issue-24183.rs
+++ b/tests/rustdoc/inline_cross/self-sized-bounds-24183.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/24183
 #![crate_type = "lib"]
 #![crate_name = "usr"]
 
diff --git a/tests/rustdoc/inline_local/issue-32343.rs b/tests/rustdoc/inline_local/doc-no-inline-32343.rs
index 2ec123fdc5c..ed11614a500 100644
--- a/tests/rustdoc/inline_local/issue-32343.rs
+++ b/tests/rustdoc/inline_local/doc-no-inline-32343.rs
@@ -1,12 +1,15 @@
-//@ !has issue_32343/struct.Foo.html
-//@ has issue_32343/index.html
+// https://github.com/rust-lang/rust/issues/32343
+#![crate_name="foobar"]
+
+//@ !has foobar/struct.Foo.html
+//@ has foobar/index.html
 //@ has - '//code' 'pub use foo::Foo'
 //@ !has - '//code/a' 'Foo'
 #[doc(no_inline)]
 pub use foo::Foo;
 
-//@ !has issue_32343/struct.Bar.html
-//@ has issue_32343/index.html
+//@ !has foobar/struct.Bar.html
+//@ has foobar/index.html
 //@ has - '//code' 'pub use foo::Bar'
 //@ has - '//code/a' 'Bar'
 #[doc(no_inline)]
@@ -18,6 +21,6 @@ mod foo {
 }
 
 pub mod bar {
-    //@ has issue_32343/bar/struct.Bar.html
+    //@ has foobar/bar/struct.Bar.html
     pub use ::foo::Bar;
 }
diff --git a/tests/rustdoc/inline_local/issue-28537.rs b/tests/rustdoc/inline_local/pub-re-export-28537.rs
index d5ba94d2e6c..0e9836c7cee 100644
--- a/tests/rustdoc/inline_local/issue-28537.rs
+++ b/tests/rustdoc/inline_local/pub-re-export-28537.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/28537
+#![crate_name="foo"]
+
 #[doc(hidden)]
 pub mod foo {
     pub struct Foo;
@@ -10,8 +13,8 @@ mod bar {
     }
 }
 
-//@ has issue_28537/struct.Foo.html
+//@ has foo/struct.Foo.html
 pub use foo::Foo;
 
-//@ has issue_28537/struct.Bar.html
+//@ has foo/struct.Bar.html
 pub use self::bar::Bar;
diff --git a/tests/rustdoc/intra-doc/issue-82209.rs b/tests/rustdoc/intra-doc/enum-self-82209.rs
index 46d028e535c..615115a5f8b 100644
--- a/tests/rustdoc/intra-doc/issue-82209.rs
+++ b/tests/rustdoc/intra-doc/enum-self-82209.rs
@@ -1,3 +1,5 @@
+// https://github.com/rust-lang/rust/issues/82209
+
 #![crate_name = "foo"]
 #![deny(rustdoc::broken_intra_doc_links)]
 pub enum Foo {
diff --git a/tests/rustdoc/intra-doc/issue-108459.rs b/tests/rustdoc/intra-doc/link-same-name-different-disambiguator-108459.rs
index 18424c069d3..0b339eaf6b2 100644
--- a/tests/rustdoc/intra-doc/issue-108459.rs
+++ b/tests/rustdoc/intra-doc/link-same-name-different-disambiguator-108459.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/pull/108459
+#![crate_name="foobar"]
+
 #![deny(rustdoc::broken_intra_doc_links)]
 #![allow(rustdoc::redundant_explicit_links)]
 
@@ -13,13 +16,13 @@ pub struct MyStruct1;
 // the same target but different text
 
 /// See also [crate::char] and [mod@char] and [prim@char]
-//@ has issue_108459/struct.MyStruct2.html '//*[@href="char/index.html"]' 'crate::char'
+//@ has foobar/struct.MyStruct2.html '//*[@href="char/index.html"]' 'crate::char'
 //@ has - '//*[@href="char/index.html"]' 'char'
 //@ has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
 pub struct MyStruct2;
 
 /// See also [mod@char] and [prim@char] and [crate::char]
-//@ has issue_108459/struct.MyStruct3.html '//*[@href="char/index.html"]' 'crate::char'
+//@ has foobar/struct.MyStruct3.html '//*[@href="char/index.html"]' 'crate::char'
 //@ has - '//*[@href="char/index.html"]' 'char'
 //@ has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
 pub struct MyStruct3;
@@ -28,11 +31,11 @@ pub struct MyStruct3;
 // different targets
 
 /// See also [char][mod@char] and [char][prim@char]
-//@ has issue_108459/struct.MyStruct4.html '//*[@href="char/index.html"]' 'char'
+//@ has foobar/struct.MyStruct4.html '//*[@href="char/index.html"]' 'char'
 //@ has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
 pub struct MyStruct4;
 
 /// See also [char][prim@char] and [char][crate::char]
-//@ has issue_108459/struct.MyStruct5.html '//*[@href="char/index.html"]' 'char'
+//@ has foobar/struct.MyStruct5.html '//*[@href="char/index.html"]' 'char'
 //@ has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
 pub struct MyStruct5;
diff --git a/tests/rustdoc/intra-doc/issue-66159.rs b/tests/rustdoc/intra-doc/same-name-different-crates-66159.rs
index 5d50f63f299..7e3ace9355a 100644
--- a/tests/rustdoc/intra-doc/issue-66159.rs
+++ b/tests/rustdoc/intra-doc/same-name-different-crates-66159.rs
@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust/issues/66159
+#![crate_name="foobar"]
+
 //@ aux-crate:priv:pub_struct=pub-struct.rs
 //@ compile-flags:-Z unstable-options
 
@@ -6,5 +9,5 @@
 // Since we don't generate the docs for the auxiliary files, we can't actually
 // verify that the struct is linked correctly.
 
-//@ has issue_66159/index.html
+//@ has foobar/index.html
 //! [pub_struct::SomeStruct]
diff --git a/tests/ui/generic-associated-types/issue-90014-tait2.rs b/tests/ui/generic-associated-types/issue-90014-tait2.rs
index ef54a89aaae..3f7a9ff63c3 100644
--- a/tests/ui/generic-associated-types/issue-90014-tait2.rs
+++ b/tests/ui/generic-associated-types/issue-90014-tait2.rs
@@ -3,8 +3,6 @@
 //! Unfortunately we don't even reach opaque type collection, as we ICE in typeck before that.
 //! See #109281 for the original report.
 //@ edition:2018
-//@ error-pattern: expected generic lifetime parameter, found `'a`
-
 #![feature(type_alias_impl_trait)]
 
 use std::future::Future;
@@ -24,6 +22,7 @@ impl<'x, T: 'x> Trait<'x> for (T,) {
 impl Foo<'_> {
     fn make_fut(&self) -> Box<dyn for<'a> Trait<'a, Thing = Fut<'a>>> {
         Box::new((async { () },))
+        //~^ ERROR expected generic lifetime parameter, found `'a`
     }
 }
 
diff --git a/tests/ui/generic-associated-types/issue-90014-tait2.stderr b/tests/ui/generic-associated-types/issue-90014-tait2.stderr
index be6f4272ce1..aa427d42649 100644
--- a/tests/ui/generic-associated-types/issue-90014-tait2.stderr
+++ b/tests/ui/generic-associated-types/issue-90014-tait2.stderr
@@ -1,5 +1,5 @@
 error[E0792]: expected generic lifetime parameter, found `'a`
-  --> $DIR/issue-90014-tait2.rs:26:9
+  --> $DIR/issue-90014-tait2.rs:24:9
    |
 LL | type Fut<'a> = impl Future<Output = ()>;
    |          -- this generic parameter must be used with a generic lifetime parameter
diff --git a/tests/ui/type-alias-impl-trait/non-lifetime-binder-in-constraint.rs b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder-in-constraint.rs
index 2a301788525..2a301788525 100644
--- a/tests/ui/type-alias-impl-trait/non-lifetime-binder-in-constraint.rs
+++ b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder-in-constraint.rs
diff --git a/tests/ui/type-alias-impl-trait/non-lifetime-binder-in-constraint.stderr b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder-in-constraint.stderr
index 38dcdbd0af2..38dcdbd0af2 100644
--- a/tests/ui/type-alias-impl-trait/non-lifetime-binder-in-constraint.stderr
+++ b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder-in-constraint.stderr
diff --git a/tests/ui/type-alias-impl-trait/non-lifetime-binder.rs b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder.rs
index 23f3666618b..23f3666618b 100644
--- a/tests/ui/type-alias-impl-trait/non-lifetime-binder.rs
+++ b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder.rs
diff --git a/tests/ui/type-alias-impl-trait/non-lifetime-binder.stderr b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder.stderr
index 3c352c9889c..3c352c9889c 100644
--- a/tests/ui/type-alias-impl-trait/non-lifetime-binder.stderr
+++ b/tests/ui/traits/non_lifetime_binders/type-alias-impl-trait/non-lifetime-binder.stderr
diff --git a/tests/ui/traits/sized-coniductive.rs b/tests/ui/traits/sized-coniductive.rs
deleted file mode 100644
index 5f63b166f98..00000000000
--- a/tests/ui/traits/sized-coniductive.rs
+++ /dev/null
@@ -1,14 +0,0 @@
-//@ check-pass
-// https://github.com/rust-lang/rust/issues/129541
-
-#[derive(Clone)]
-struct Test {
-    field: std::borrow::Cow<'static, [Self]>,
-}
-
-#[derive(Clone)]
-struct Hello {
-    a: <[Hello] as std::borrow::ToOwned>::Owned,
-}
-
-fn main(){}
diff --git a/tests/ui/traits/solver-cycles/129541-recursive-struct-and-array-impl.rs b/tests/ui/traits/solver-cycles/129541-recursive-struct-and-array-impl.rs
deleted file mode 100644
index defb39aae06..00000000000
--- a/tests/ui/traits/solver-cycles/129541-recursive-struct-and-array-impl.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-// Regression test for #129541
-
-//@ check-pass
-
-trait Bound {}
-trait Normalize {
-    type Assoc;
-}
-
-impl<T: Bound> Normalize for T {
-    type Assoc = T;
-}
-
-impl<T: Bound> Normalize for [T] {
-    type Assoc = T;
-}
-
-impl Bound for Hello {}
-struct Hello {
-    a: <[Hello] as Normalize>::Assoc,
-}
-
-fn main() {}
diff --git a/tests/ui/traits/solver-cycles/129541-recursive-struct.rs b/tests/ui/traits/solver-cycles/129541-recursive-struct.rs
index d4339dd54d6..4fbcbefec91 100644
--- a/tests/ui/traits/solver-cycles/129541-recursive-struct.rs
+++ b/tests/ui/traits/solver-cycles/129541-recursive-struct.rs
@@ -1,5 +1,6 @@
 // Regression test for #129541
 
+//@ revisions: unique multiple
 //@ check-pass
 
 trait Bound {}
@@ -7,6 +8,10 @@ trait Normalize {
     type Assoc;
 }
 
+#[cfg(multiple)]
+impl<T: Bound> Normalize for T {
+    type Assoc = T;
+}
 impl<T: Bound> Normalize for [T] {
     type Assoc = T;
 }
diff --git a/tests/ui/wf/wf-trait-default-fn-ret.rs b/tests/ui/wf/wf-trait-default-fn-ret.rs
index 2103dae8d23..a7f83dcf678 100644
--- a/tests/ui/wf/wf-trait-default-fn-ret.rs
+++ b/tests/ui/wf/wf-trait-default-fn-ret.rs
@@ -1,5 +1,4 @@
-// Check that we test WF conditions for fn arguments. Because the
-// current code is so goofy, this is only a warning for now.
+// Check that we test WF conditions for fn arguments.
 
 #![feature(rustc_attrs)]
 #![allow(dead_code)]
diff --git a/tests/ui/wf/wf-trait-default-fn-ret.stderr b/tests/ui/wf/wf-trait-default-fn-ret.stderr
index f749ac7b1b3..f0d1b55edc4 100644
--- a/tests/ui/wf/wf-trait-default-fn-ret.stderr
+++ b/tests/ui/wf/wf-trait-default-fn-ret.stderr
@@ -1,11 +1,11 @@
 error[E0277]: the trait bound `Self: Eq` is not satisfied
-  --> $DIR/wf-trait-default-fn-ret.rs:11:22
+  --> $DIR/wf-trait-default-fn-ret.rs:10:22
    |
 LL |     fn bar(&self) -> Bar<Self> {
    |                      ^^^^^^^^^ the trait `Eq` is not implemented for `Self`
    |
 note: required by a bound in `Bar`
-  --> $DIR/wf-trait-default-fn-ret.rs:8:14
+  --> $DIR/wf-trait-default-fn-ret.rs:7:14
    |
 LL | struct Bar<T:Eq+?Sized> { value: Box<T> }
    |              ^^ required by this bound in `Bar`