Auto merge of #132035 - matthiaskrgr:rollup-ty1e4q0, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #125205 (Fixup Windows verbatim paths when used with the `include!` macro)
 - #131049 (Validate args are correct for `UnevaluatedConst`, `ExistentialTraitRef`/`ExistentialProjection`)
 - #131549 (Add a note for `?` on a `impl Future<Output = Result<..>>` in sync function)
 - #131731 (add `TestFloatParse` to `tools.rs` for bootstrap)
 - #131732 (Add doc(plugins), doc(passes), etc. to INVALID_DOC_ATTRIBUTES)
 - #132006 (don't stage-off to previous compiler when CI rustc is available)
 - #132022 (Move `cmp_in_dominator_order` out of graph dominator computation)
 - #132033 (compiletest: Make `line_directive` return a `DirectiveLine`)

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

35 files changed, 473 insertions, 253 deletions

diff --git a/compiler/rustc_data_structures/src/graph/dominators/mod.rs b/compiler/rustc_data_structures/src/graph/dominators/mod.rs
index 7cb013fdbd8..85b030c1a48 100644
--- a/compiler/rustc_data_structures/src/graph/dominators/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/dominators/mod.rs
@@ -9,8 +9,6 @@
 //! Thomas Lengauer and Robert Endre Tarjan.
 //! <https://www.cs.princeton.edu/courses/archive/spr03/cs423/download/dominators.pdf>
 
-use std::cmp::Ordering;
-
 use rustc_index::{Idx, IndexSlice, IndexVec};
 
 use super::ControlFlowGraph;
@@ -64,9 +62,6 @@ fn is_small_path_graph<G: ControlFlowGraph>(g: &G) -> bool {
 }
 
 fn dominators_impl<G: ControlFlowGraph>(graph: &G) -> Inner<G::Node> {
-    // compute the post order index (rank) for each node
-    let mut post_order_rank = IndexVec::from_elem_n(0, graph.num_nodes());
-
     // We allocate capacity for the full set of nodes, because most of the time
     // most of the nodes *are* reachable.
     let mut parent: IndexVec<PreorderIndex, PreorderIndex> =
@@ -83,12 +78,10 @@ fn dominators_impl<G: ControlFlowGraph>(graph: &G) -> Inner<G::Node> {
     pre_order_to_real.push(graph.start_node());
     parent.push(PreorderIndex::ZERO); // the parent of the root node is the root for now.
     real_to_pre_order[graph.start_node()] = Some(PreorderIndex::ZERO);
-    let mut post_order_idx = 0;
 
     // Traverse the graph, collecting a number of things:
     //
     // * Preorder mapping (to it, and back to the actual ordering)
-    // * Postorder mapping (used exclusively for `cmp_in_dominator_order` on the final product)
     // * Parents for each vertex in the preorder tree
     //
     // These are all done here rather than through one of the 'standard'
@@ -104,8 +97,6 @@ fn dominators_impl<G: ControlFlowGraph>(graph: &G) -> Inner<G::Node> {
                 continue 'recurse;
             }
         }
-        post_order_rank[pre_order_to_real[frame.pre_order_idx]] = post_order_idx;
-        post_order_idx += 1;
 
         stack.pop();
     }
@@ -282,7 +273,7 @@ fn dominators_impl<G: ControlFlowGraph>(graph: &G) -> Inner<G::Node> {
 
     let time = compute_access_time(start_node, &immediate_dominators);
 
-    Inner { post_order_rank, immediate_dominators, time }
+    Inner { immediate_dominators, time }
 }
 
 /// Evaluate the link-eval virtual forest, providing the currently minimum semi
@@ -348,7 +339,6 @@ fn compress(
 /// Tracks the list of dominators for each node.
 #[derive(Clone, Debug)]
 struct Inner<N: Idx> {
-    post_order_rank: IndexVec<N, usize>,
     // Even though we track only the immediate dominator of each node, it's
     // possible to get its full list of dominators by looking up the dominator
     // of each dominator.
@@ -379,17 +369,6 @@ impl<Node: Idx> Dominators<Node> {
         }
     }
 
-    /// Provide deterministic ordering of nodes such that, if any two nodes have a dominator
-    /// relationship, the dominator will always precede the dominated. (The relative ordering
-    /// of two unrelated nodes will also be consistent, but otherwise the order has no
-    /// meaning.) This method cannot be used to determine if either Node dominates the other.
-    pub fn cmp_in_dominator_order(&self, lhs: Node, rhs: Node) -> Ordering {
-        match &self.kind {
-            Kind::Path => lhs.index().cmp(&rhs.index()),
-            Kind::General(g) => g.post_order_rank[rhs].cmp(&g.post_order_rank[lhs]),
-        }
-    }
-
     /// Returns true if `a` dominates `b`.
     ///
     /// # Panics
diff --git a/compiler/rustc_expand/src/base.rs b/compiler/rustc_expand/src/base.rs
index f0cfe133a49..bed500c3032 100644
--- a/compiler/rustc_expand/src/base.rs
+++ b/compiler/rustc_expand/src/base.rs
@@ -1,5 +1,6 @@
 use std::default::Default;
 use std::iter;
+use std::path::Component::Prefix;
 use std::path::{Path, PathBuf};
 use std::rc::Rc;
 
@@ -1293,7 +1294,12 @@ pub fn resolve_path(sess: &Session, path: impl Into<PathBuf>, span: Span) -> PRe
         base_path.push(path);
         Ok(base_path)
     } else {
-        Ok(path)
+        // This ensures that Windows verbatim paths are fixed if mixed path separators are used,
+        // which can happen when `concat!` is used to join paths.
+        match path.components().next() {
+            Some(Prefix(prefix)) if prefix.kind().is_verbatim() => Ok(path.components().collect()),
+            _ => Ok(path),
+        }
     }
 }
 
diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs
index a1ee120e855..4cb55ec8c89 100644
--- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs
+++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs
@@ -259,7 +259,6 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                         }
                     })
                     .collect();
-                let args = tcx.mk_args(&args);
 
                 let span = i.bottom().1;
                 let empty_generic_args = hir_trait_bounds.iter().any(|hir_bound| {
@@ -292,7 +291,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                     .emit();
                 }
 
-                ty::ExistentialTraitRef { def_id: trait_ref.def_id, args }
+                ty::ExistentialTraitRef::new(tcx, trait_ref.def_id, args)
             })
         });
 
diff --git a/compiler/rustc_hir_typeck/src/expr.rs b/compiler/rustc_hir_typeck/src/expr.rs
index f4d7b59e9c8..a1813782e29 100644
--- a/compiler/rustc_hir_typeck/src/expr.rs
+++ b/compiler/rustc_hir_typeck/src/expr.rs
@@ -10,7 +10,8 @@ use rustc_data_structures::stack::ensure_sufficient_stack;
 use rustc_data_structures::unord::UnordMap;
 use rustc_errors::codes::*;
 use rustc_errors::{
-    Applicability, Diag, ErrorGuaranteed, StashKey, Subdiagnostic, pluralize, struct_span_code_err,
+    Applicability, Diag, ErrorGuaranteed, MultiSpan, StashKey, Subdiagnostic, pluralize,
+    struct_span_code_err,
 };
 use rustc_hir::def::{CtorKind, DefKind, Res};
 use rustc_hir::def_id::DefId;
@@ -2763,12 +2764,25 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             field_ident.span,
             "field not available in `impl Future`, but it is available in its `Output`",
         );
-        err.span_suggestion_verbose(
-            base.span.shrink_to_hi(),
-            "consider `await`ing on the `Future` and access the field of its `Output`",
-            ".await",
-            Applicability::MaybeIncorrect,
-        );
+        match self.tcx.coroutine_kind(self.body_id) {
+            Some(hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Async, _)) => {
+                err.span_suggestion_verbose(
+                    base.span.shrink_to_hi(),
+                    "consider `await`ing on the `Future` to access the field",
+                    ".await",
+                    Applicability::MaybeIncorrect,
+                );
+            }
+            _ => {
+                let mut span: MultiSpan = base.span.into();
+                span.push_span_label(self.tcx.def_span(self.body_id), "this is not `async`");
+                err.span_note(
+                    span,
+                    "this implements `Future` and its output type has the field, \
+                    but the future cannot be awaited in a synchronous function",
+                );
+            }
+        }
     }
 
     fn ban_nonexisting_field(
diff --git a/compiler/rustc_middle/src/ty/consts.rs b/compiler/rustc_middle/src/ty/consts.rs
index eb715be22b1..5ab85a69ce6 100644
--- a/compiler/rustc_middle/src/ty/consts.rs
+++ b/compiler/rustc_middle/src/ty/consts.rs
@@ -109,6 +109,7 @@ impl<'tcx> Const<'tcx> {
 
     #[inline]
     pub fn new_unevaluated(tcx: TyCtxt<'tcx>, uv: ty::UnevaluatedConst<'tcx>) -> Const<'tcx> {
+        tcx.debug_assert_args_compatible(uv.def, uv.args);
         Const::new(tcx, ty::ConstKind::Unevaluated(uv))
     }
 
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index 210b115ae37..9ffdcf646ac 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -279,6 +279,26 @@ impl<'tcx> Interner for TyCtxt<'tcx> {
         self.debug_assert_args_compatible(def_id, args);
     }
 
+    /// Assert that the args from an `ExistentialTraitRef` or `ExistentialProjection`
+    /// are compatible with the `DefId`. Since we're missing a `Self` type, stick on
+    /// a dummy self type and forward to `debug_assert_args_compatible`.
+    fn debug_assert_existential_args_compatible(
+        self,
+        def_id: Self::DefId,
+        args: Self::GenericArgs,
+    ) {
+        // FIXME: We could perhaps add a `skip: usize` to `debug_assert_args_compatible`
+        // to avoid needing to reintern the set of args...
+        if cfg!(debug_assertions) {
+            self.debug_assert_args_compatible(
+                def_id,
+                self.mk_args_from_iter(
+                    [self.types.trait_object_dummy_self.into()].into_iter().chain(args.iter()),
+                ),
+            );
+        }
+    }
+
     fn mk_type_list_from_iter<I, T>(self, args: I) -> T::Output
     where
         I: Iterator<Item = T>,
diff --git a/compiler/rustc_mir_transform/src/coverage/graph.rs b/compiler/rustc_mir_transform/src/coverage/graph.rs
index d839f46cfbd..930fa129ef2 100644
--- a/compiler/rustc_mir_transform/src/coverage/graph.rs
+++ b/compiler/rustc_mir_transform/src/coverage/graph.rs
@@ -21,6 +21,10 @@ pub(crate) struct CoverageGraph {
     pub(crate) successors: IndexVec<BasicCoverageBlock, Vec<BasicCoverageBlock>>,
     pub(crate) predecessors: IndexVec<BasicCoverageBlock, Vec<BasicCoverageBlock>>,
     dominators: Option<Dominators<BasicCoverageBlock>>,
+    /// Allows nodes to be compared in some total order such that _if_
+    /// `a` dominates `b`, then `a < b`. If neither node dominates the other,
+    /// their relative order is consistent but arbitrary.
+    dominator_order_rank: IndexVec<BasicCoverageBlock, u32>,
 }
 
 impl CoverageGraph {
@@ -54,10 +58,27 @@ impl CoverageGraph {
             }
         }
 
-        let mut this = Self { bcbs, bb_to_bcb, successors, predecessors, dominators: None };
+        let num_nodes = bcbs.len();
+        let mut this = Self {
+            bcbs,
+            bb_to_bcb,
+            successors,
+            predecessors,
+            dominators: None,
+            dominator_order_rank: IndexVec::from_elem_n(0, num_nodes),
+        };
+        assert_eq!(num_nodes, this.num_nodes());
 
         this.dominators = Some(dominators::dominators(&this));
 
+        // The dominator rank of each node is just its index in a reverse-postorder traversal.
+        let reverse_post_order = graph::iterate::reverse_post_order(&this, this.start_node());
+        // The coverage graph is created by traversal, so all nodes are reachable.
+        assert_eq!(reverse_post_order.len(), this.num_nodes());
+        for (rank, bcb) in (0u32..).zip(reverse_post_order) {
+            this.dominator_order_rank[bcb] = rank;
+        }
+
         // The coverage graph's entry-point node (bcb0) always starts with bb0,
         // which never has predecessors. Any other blocks merged into bcb0 can't
         // have multiple (coverage-relevant) predecessors, so bcb0 always has
@@ -162,7 +183,7 @@ impl CoverageGraph {
         a: BasicCoverageBlock,
         b: BasicCoverageBlock,
     ) -> Ordering {
-        self.dominators.as_ref().unwrap().cmp_in_dominator_order(a, b)
+        self.dominator_order_rank[a].cmp(&self.dominator_order_rank[b])
     }
 
     /// Returns the source of this node's sole in-edge, if it has exactly one.
diff --git a/compiler/rustc_passes/messages.ftl b/compiler/rustc_passes/messages.ftl
index 899a7b84100..3f98236595b 100644
--- a/compiler/rustc_passes/messages.ftl
+++ b/compiler/rustc_passes/messages.ftl
@@ -245,6 +245,19 @@ passes_doc_test_unknown_include =
     unknown `doc` attribute `{$path}`
     .suggestion = use `doc = include_str!` instead
 
+passes_doc_test_unknown_passes =
+    unknown `doc` attribute `{$path}`
+    .note = `doc` attribute `{$path}` no longer functions; see issue #44136 <https://github.com/rust-lang/rust/issues/44136>
+    .label = no longer functions
+    .help = you may want to use `doc(document_private_items)`
+    .no_op_note = `doc({$path})` is now a no-op
+
+passes_doc_test_unknown_plugins =
+    unknown `doc` attribute `{$path}`
+    .note = `doc` attribute `{$path}` no longer functions; see issue #44136 <https://github.com/rust-lang/rust/issues/44136> and CVE-2018-1000622 <https://nvd.nist.gov/vuln/detail/CVE-2018-1000622>
+    .label = no longer functions
+    .no_op_note = `doc({$path})` is now a no-op
+
 passes_doc_test_unknown_spotlight =
     unknown `doc` attribute `{$path}`
     .note = `doc(spotlight)` was renamed to `doc(notable_trait)`
diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs
index 8b30546d5cc..298c065b059 100644
--- a/compiler/rustc_passes/src/check_attr.rs
+++ b/compiler/rustc_passes/src/check_attr.rs
@@ -1183,15 +1183,7 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
 
                         sym::masked => self.check_doc_masked(attr, meta, hir_id, target),
 
-                        // no_default_passes: deprecated
-                        // passes: deprecated
-                        // plugins: removed, but rustdoc warns about it itself
-                        sym::cfg
-                        | sym::hidden
-                        | sym::no_default_passes
-                        | sym::notable_trait
-                        | sym::passes
-                        | sym::plugins => {}
+                        sym::cfg | sym::hidden | sym::notable_trait => {}
 
                         sym::rust_logo => {
                             if self.check_attr_crate_level(attr, meta, hir_id)
@@ -1240,6 +1232,22 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
                                         sugg: (attr.meta().unwrap().span, applicability),
                                     },
                                 );
+                            } else if i_meta.has_name(sym::passes)
+                                || i_meta.has_name(sym::no_default_passes)
+                            {
+                                self.tcx.emit_node_span_lint(
+                                    INVALID_DOC_ATTRIBUTES,
+                                    hir_id,
+                                    i_meta.span,
+                                    errors::DocTestUnknownPasses { path, span: i_meta.span },
+                                );
+                            } else if i_meta.has_name(sym::plugins) {
+                                self.tcx.emit_node_span_lint(
+                                    INVALID_DOC_ATTRIBUTES,
+                                    hir_id,
+                                    i_meta.span,
+                                    errors::DocTestUnknownPlugins { path, span: i_meta.span },
+                                );
                             } else {
                                 self.tcx.emit_node_span_lint(
                                     INVALID_DOC_ATTRIBUTES,
diff --git a/compiler/rustc_passes/src/errors.rs b/compiler/rustc_passes/src/errors.rs
index f01ddbd47ef..042e50d890e 100644
--- a/compiler/rustc_passes/src/errors.rs
+++ b/compiler/rustc_passes/src/errors.rs
@@ -324,6 +324,27 @@ pub(crate) struct DocTestUnknownSpotlight {
 }
 
 #[derive(LintDiagnostic)]
+#[diag(passes_doc_test_unknown_passes)]
+#[note]
+#[help]
+#[note(passes_no_op_note)]
+pub(crate) struct DocTestUnknownPasses {
+    pub path: String,
+    #[label]
+    pub span: Span,
+}
+
+#[derive(LintDiagnostic)]
+#[diag(passes_doc_test_unknown_plugins)]
+#[note]
+#[note(passes_no_op_note)]
+pub(crate) struct DocTestUnknownPlugins {
+    pub path: String,
+    #[label]
+    pub span: Span,
+}
+
+#[derive(LintDiagnostic)]
 #[diag(passes_doc_test_unknown_include)]
 pub(crate) struct DocTestUnknownInclude {
     pub path: String,
diff --git a/compiler/rustc_passes/src/reachable.rs b/compiler/rustc_passes/src/reachable.rs
index 056318fbcb7..0ec151ceb45 100644
--- a/compiler/rustc_passes/src/reachable.rs
+++ b/compiler/rustc_passes/src/reachable.rs
@@ -322,7 +322,7 @@ impl<'tcx> ReachableContext<'tcx> {
                     self.visit(ty);
                     // Manually visit to actually see the trait's `DefId`. Type visitors won't see it
                     if let Some(trait_ref) = dyn_ty.principal() {
-                        let ExistentialTraitRef { def_id, args } = trait_ref.skip_binder();
+                        let ExistentialTraitRef { def_id, args, .. } = trait_ref.skip_binder();
                         self.visit_def_id(def_id, "", &"");
                         self.visit(args);
                     }
diff --git a/compiler/rustc_privacy/src/lib.rs b/compiler/rustc_privacy/src/lib.rs
index f67c4cb922c..7827975d3ca 100644
--- a/compiler/rustc_privacy/src/lib.rs
+++ b/compiler/rustc_privacy/src/lib.rs
@@ -32,8 +32,8 @@ use rustc_middle::middle::privacy::{EffectiveVisibilities, EffectiveVisibility,
 use rustc_middle::query::Providers;
 use rustc_middle::ty::print::PrintTraitRefExt as _;
 use rustc_middle::ty::{
-    self, Const, GenericArgs, GenericParamDefKind, TraitRef, Ty, TyCtxt, TypeSuperVisitable,
-    TypeVisitable, TypeVisitor,
+    self, Const, GenericParamDefKind, TraitRef, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable,
+    TypeVisitor,
 };
 use rustc_middle::{bug, span_bug};
 use rustc_session::lint;
@@ -246,10 +246,10 @@ where
                         ty::ExistentialPredicate::Trait(trait_ref) => trait_ref,
                         ty::ExistentialPredicate::Projection(proj) => proj.trait_ref(tcx),
                         ty::ExistentialPredicate::AutoTrait(def_id) => {
-                            ty::ExistentialTraitRef { def_id, args: GenericArgs::empty() }
+                            ty::ExistentialTraitRef::new(tcx, def_id, ty::GenericArgs::empty())
                         }
                     };
-                    let ty::ExistentialTraitRef { def_id, args: _ } = trait_ref;
+                    let ty::ExistentialTraitRef { def_id, .. } = trait_ref;
                     try_visit!(self.def_id_visitor.visit_def_id(def_id, "trait", &trait_ref));
                 }
             }
diff --git a/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs b/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs
index 83dcceeaa84..cba79a02f8b 100644
--- a/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs
+++ b/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs
@@ -245,11 +245,15 @@ fn trait_object_ty<'tcx>(tcx: TyCtxt<'tcx>, poly_trait_ref: ty::PolyTraitRef<'tc
                             alias_ty.to_ty(tcx),
                         );
                         debug!("Resolved {:?} -> {resolved}", alias_ty.to_ty(tcx));
-                        ty::ExistentialPredicate::Projection(ty::ExistentialProjection {
-                            def_id: assoc_ty.def_id,
-                            args: ty::ExistentialTraitRef::erase_self_ty(tcx, super_trait_ref).args,
-                            term: resolved.into(),
-                        })
+                        ty::ExistentialPredicate::Projection(
+                            ty::ExistentialProjection::erase_self_ty(
+                                tcx,
+                                ty::ProjectionPredicate {
+                                    projection_term: alias_ty.into(),
+                                    term: resolved.into(),
+                                },
+                            ),
+                        )
                     })
                 })
         })
@@ -318,10 +322,11 @@ pub(crate) fn transform_instance<'tcx>(
             .lang_items()
             .drop_trait()
             .unwrap_or_else(|| bug!("typeid_for_instance: couldn't get drop_trait lang item"));
-        let predicate = ty::ExistentialPredicate::Trait(ty::ExistentialTraitRef {
+        let predicate = ty::ExistentialPredicate::Trait(ty::ExistentialTraitRef::new_from_args(
+            tcx,
             def_id,
-            args: List::empty(),
-        });
+            ty::List::empty(),
+        ));
         let predicates = tcx.mk_poly_existential_predicates(&[ty::Binder::dummy(predicate)]);
         let self_ty = Ty::new_dynamic(tcx, predicates, tcx.lifetimes.re_erased, ty::Dyn);
         instance.args = tcx.mk_args_trait(self_ty, List::empty());
diff --git a/compiler/rustc_smir/src/rustc_internal/internal.rs b/compiler/rustc_smir/src/rustc_internal/internal.rs
index e9c3b3ffc1d..7be7db1fd3d 100644
--- a/compiler/rustc_smir/src/rustc_internal/internal.rs
+++ b/compiler/rustc_smir/src/rustc_internal/internal.rs
@@ -380,11 +380,12 @@ impl RustcInternal for ExistentialProjection {
     type T<'tcx> = rustc_ty::ExistentialProjection<'tcx>;
 
     fn internal<'tcx>(&self, tables: &mut Tables<'_>, tcx: TyCtxt<'tcx>) -> Self::T<'tcx> {
-        rustc_ty::ExistentialProjection {
-            def_id: self.def_id.0.internal(tables, tcx),
-            args: self.generic_args.internal(tables, tcx),
-            term: self.term.internal(tables, tcx),
-        }
+        rustc_ty::ExistentialProjection::new_from_args(
+            tcx,
+            self.def_id.0.internal(tables, tcx),
+            self.generic_args.internal(tables, tcx),
+            self.term.internal(tables, tcx),
+        )
     }
 }
 
@@ -403,10 +404,11 @@ impl RustcInternal for ExistentialTraitRef {
     type T<'tcx> = rustc_ty::ExistentialTraitRef<'tcx>;
 
     fn internal<'tcx>(&self, tables: &mut Tables<'_>, tcx: TyCtxt<'tcx>) -> Self::T<'tcx> {
-        rustc_ty::ExistentialTraitRef {
-            def_id: self.def_id.0.internal(tables, tcx),
-            args: self.generic_args.internal(tables, tcx),
-        }
+        rustc_ty::ExistentialTraitRef::new_from_args(
+            tcx,
+            self.def_id.0.internal(tables, tcx),
+            self.generic_args.internal(tables, tcx),
+        )
     }
 }
 
diff --git a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs
index b9372283feb..ef2ee9a166a 100644
--- a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs
+++ b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs
@@ -68,7 +68,7 @@ impl<'tcx> Stable<'tcx> for ty::ExistentialTraitRef<'tcx> {
     type T = stable_mir::ty::ExistentialTraitRef;
 
     fn stable(&self, tables: &mut Tables<'_>) -> Self::T {
-        let ty::ExistentialTraitRef { def_id, args } = self;
+        let ty::ExistentialTraitRef { def_id, args, .. } = self;
         stable_mir::ty::ExistentialTraitRef {
             def_id: tables.trait_def(*def_id),
             generic_args: args.stable(tables),
@@ -95,7 +95,7 @@ impl<'tcx> Stable<'tcx> for ty::ExistentialProjection<'tcx> {
     type T = stable_mir::ty::ExistentialProjection;
 
     fn stable(&self, tables: &mut Tables<'_>) -> Self::T {
-        let ty::ExistentialProjection { def_id, args, term } = self;
+        let ty::ExistentialProjection { def_id, args, term, .. } = self;
         stable_mir::ty::ExistentialProjection {
             def_id: tables.trait_def(*def_id),
             generic_args: args.stable(tables),
diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs
index 677905a3085..ff542cfbec1 100644
--- a/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs
@@ -3594,52 +3594,64 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
         trait_pred: ty::PolyTraitPredicate<'tcx>,
         span: Span,
     ) {
-        if let Some(hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Async, _)) =
-            self.tcx.coroutine_kind(obligation.cause.body_id)
-        {
-            let future_trait = self.tcx.require_lang_item(LangItem::Future, None);
+        let future_trait = self.tcx.require_lang_item(LangItem::Future, None);
 
-            let self_ty = self.resolve_vars_if_possible(trait_pred.self_ty());
-            let impls_future = self.type_implements_trait(
-                future_trait,
-                [self.tcx.instantiate_bound_regions_with_erased(self_ty)],
-                obligation.param_env,
-            );
-            if !impls_future.must_apply_modulo_regions() {
-                return;
-            }
+        let self_ty = self.resolve_vars_if_possible(trait_pred.self_ty());
+        let impls_future = self.type_implements_trait(
+            future_trait,
+            [self.tcx.instantiate_bound_regions_with_erased(self_ty)],
+            obligation.param_env,
+        );
+        if !impls_future.must_apply_modulo_regions() {
+            return;
+        }
 
-            let item_def_id = self.tcx.associated_item_def_ids(future_trait)[0];
-            // `<T as Future>::Output`
-            let projection_ty = trait_pred.map_bound(|trait_pred| {
-                Ty::new_projection(
-                    self.tcx,
-                    item_def_id,
-                    // Future::Output has no args
-                    [trait_pred.self_ty()],
-                )
-            });
-            let InferOk { value: projection_ty, .. } =
-                self.at(&obligation.cause, obligation.param_env).normalize(projection_ty);
+        let item_def_id = self.tcx.associated_item_def_ids(future_trait)[0];
+        // `<T as Future>::Output`
+        let projection_ty = trait_pred.map_bound(|trait_pred| {
+            Ty::new_projection(
+                self.tcx,
+                item_def_id,
+                // Future::Output has no args
+                [trait_pred.self_ty()],
+            )
+        });
+        let InferOk { value: projection_ty, .. } =
+            self.at(&obligation.cause, obligation.param_env).normalize(projection_ty);
 
-            debug!(
-                normalized_projection_type = ?self.resolve_vars_if_possible(projection_ty)
-            );
-            let try_obligation = self.mk_trait_obligation_with_new_self_ty(
-                obligation.param_env,
-                trait_pred.map_bound(|trait_pred| (trait_pred, projection_ty.skip_binder())),
-            );
-            debug!(try_trait_obligation = ?try_obligation);
-            if self.predicate_may_hold(&try_obligation)
-                && let Ok(snippet) = self.tcx.sess.source_map().span_to_snippet(span)
-                && snippet.ends_with('?')
-            {
-                err.span_suggestion_verbose(
-                    span.with_hi(span.hi() - BytePos(1)).shrink_to_hi(),
-                    "consider `await`ing on the `Future`",
-                    ".await",
-                    Applicability::MaybeIncorrect,
-                );
+        debug!(
+            normalized_projection_type = ?self.resolve_vars_if_possible(projection_ty)
+        );
+        let try_obligation = self.mk_trait_obligation_with_new_self_ty(
+            obligation.param_env,
+            trait_pred.map_bound(|trait_pred| (trait_pred, projection_ty.skip_binder())),
+        );
+        debug!(try_trait_obligation = ?try_obligation);
+        if self.predicate_may_hold(&try_obligation)
+            && let Ok(snippet) = self.tcx.sess.source_map().span_to_snippet(span)
+            && snippet.ends_with('?')
+        {
+            match self.tcx.coroutine_kind(obligation.cause.body_id) {
+                Some(hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Async, _)) => {
+                    err.span_suggestion_verbose(
+                        span.with_hi(span.hi() - BytePos(1)).shrink_to_hi(),
+                        "consider `await`ing on the `Future`",
+                        ".await",
+                        Applicability::MaybeIncorrect,
+                    );
+                }
+                _ => {
+                    let mut span: MultiSpan = span.with_lo(span.hi() - BytePos(1)).into();
+                    span.push_span_label(
+                        self.tcx.def_span(obligation.cause.body_id),
+                        "this is not `async`",
+                    );
+                    err.span_note(
+                        span,
+                        "this implements `Future` and its output type supports \
+                        `?`, but the future cannot be awaited in a synchronous function",
+                    );
+                }
             }
         }
     }
diff --git a/compiler/rustc_type_ir/src/interner.rs b/compiler/rustc_type_ir/src/interner.rs
index f06017d7e5c..4184e9e313f 100644
--- a/compiler/rustc_type_ir/src/interner.rs
+++ b/compiler/rustc_type_ir/src/interner.rs
@@ -15,9 +15,7 @@ use crate::solve::{
     CanonicalInput, ExternalConstraintsData, PredefinedOpaquesData, QueryResult, SolverMode,
 };
 use crate::visit::{Flags, TypeSuperVisitable, TypeVisitable};
-use crate::{
-    search_graph, {self as ty},
-};
+use crate::{self as ty, search_graph};
 
 pub trait Interner:
     Sized
@@ -173,6 +171,10 @@ pub trait Interner:
 
     fn debug_assert_args_compatible(self, def_id: Self::DefId, args: Self::GenericArgs);
 
+    /// Assert that the args from an `ExistentialTraitRef` or `ExistentialProjection`
+    /// are compatible with the `DefId`.
+    fn debug_assert_existential_args_compatible(self, def_id: Self::DefId, args: Self::GenericArgs);
+
     fn mk_type_list_from_iter<I, T>(self, args: I) -> T::Output
     where
         I: Iterator<Item = T>,
diff --git a/compiler/rustc_type_ir/src/predicate.rs b/compiler/rustc_type_ir/src/predicate.rs
index b613505f826..e8ce39be3e5 100644
--- a/compiler/rustc_type_ir/src/predicate.rs
+++ b/compiler/rustc_type_ir/src/predicate.rs
@@ -289,9 +289,26 @@ impl<I: Interner> ty::Binder<I, ExistentialPredicate<I>> {
 pub struct ExistentialTraitRef<I: Interner> {
     pub def_id: I::DefId,
     pub args: I::GenericArgs,
+    /// This field exists to prevent the creation of `ExistentialTraitRef` without
+    /// calling [`ExistentialTraitRef::new_from_args`].
+    _use_existential_trait_ref_new_instead: (),
 }
 
 impl<I: Interner> ExistentialTraitRef<I> {
+    pub fn new_from_args(interner: I, trait_def_id: I::DefId, args: I::GenericArgs) -> Self {
+        interner.debug_assert_existential_args_compatible(trait_def_id, args);
+        Self { def_id: trait_def_id, args, _use_existential_trait_ref_new_instead: () }
+    }
+
+    pub fn new(
+        interner: I,
+        trait_def_id: I::DefId,
+        args: impl IntoIterator<Item: Into<I::GenericArg>>,
+    ) -> Self {
+        let args = interner.mk_args_from_iter(args.into_iter().map(Into::into));
+        Self::new_from_args(interner, trait_def_id, args)
+    }
+
     pub fn erase_self_ty(interner: I, trait_ref: TraitRef<I>) -> ExistentialTraitRef<I> {
         // Assert there is a Self.
         trait_ref.args.type_at(0);
@@ -299,6 +316,7 @@ impl<I: Interner> ExistentialTraitRef<I> {
         ExistentialTraitRef {
             def_id: trait_ref.def_id,
             args: interner.mk_args(&trait_ref.args.as_slice()[1..]),
+            _use_existential_trait_ref_new_instead: (),
         }
     }
 
@@ -336,9 +354,33 @@ pub struct ExistentialProjection<I: Interner> {
     pub def_id: I::DefId,
     pub args: I::GenericArgs,
     pub term: I::Term,
+
+    /// This field exists to prevent the creation of `ExistentialProjection`
+    /// without using [`ExistentialProjection::new_from_args`].
+    use_existential_projection_new_instead: (),
 }
 
 impl<I: Interner> ExistentialProjection<I> {
+    pub fn new_from_args(
+        interner: I,
+        def_id: I::DefId,
+        args: I::GenericArgs,
+        term: I::Term,
+    ) -> ExistentialProjection<I> {
+        interner.debug_assert_existential_args_compatible(def_id, args);
+        Self { def_id, args, term, use_existential_projection_new_instead: () }
+    }
+
+    pub fn new(
+        interner: I,
+        def_id: I::DefId,
+        args: impl IntoIterator<Item: Into<I::GenericArg>>,
+        term: I::Term,
+    ) -> ExistentialProjection<I> {
+        let args = interner.mk_args_from_iter(args.into_iter().map(Into::into));
+        Self::new_from_args(interner, def_id, args, term)
+    }
+
     /// Extracts the underlying existential trait reference from this projection.
     /// For example, if this is a projection of `exists T. <T as Iterator>::Item == X`,
     /// then this function would return an `exists T. T: Iterator` existential trait
@@ -347,7 +389,7 @@ impl<I: Interner> ExistentialProjection<I> {
         let def_id = interner.parent(self.def_id);
         let args_count = interner.generics_of(def_id).count() - 1;
         let args = interner.mk_args(&self.args.as_slice()[..args_count]);
-        ExistentialTraitRef { def_id, args }
+        ExistentialTraitRef { def_id, args, _use_existential_trait_ref_new_instead: () }
     }
 
     pub fn with_self_ty(&self, interner: I, self_ty: I::Ty) -> ProjectionPredicate<I> {
@@ -372,6 +414,7 @@ impl<I: Interner> ExistentialProjection<I> {
             def_id: projection_predicate.projection_term.def_id,
             args: interner.mk_args(&projection_predicate.projection_term.args.as_slice()[1..]),
             term: projection_predicate.term,
+            use_existential_projection_new_instead: (),
         }
     }
 }
diff --git a/compiler/rustc_type_ir/src/relate.rs b/compiler/rustc_type_ir/src/relate.rs
index e1f3e493e36..a0b93064694 100644
--- a/compiler/rustc_type_ir/src/relate.rs
+++ b/compiler/rustc_type_ir/src/relate.rs
@@ -333,7 +333,7 @@ impl<I: Interner> Relate<I> for ty::ExistentialProjection<I> {
                 a.args,
                 b.args,
             )?;
-            Ok(ty::ExistentialProjection { def_id: a.def_id, args, term })
+            Ok(ty::ExistentialProjection::new_from_args(relation.cx(), a.def_id, args, term))
         }
     }
 }
@@ -373,7 +373,7 @@ impl<I: Interner> Relate<I> for ty::ExistentialTraitRef<I> {
             }))
         } else {
             let args = relate_args_invariantly(relation, a.args, b.args)?;
-            Ok(ty::ExistentialTraitRef { def_id: a.def_id, args })
+            Ok(ty::ExistentialTraitRef::new_from_args(relation.cx(), a.def_id, args))
         }
     }
 }
diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index e25b571acba..27acaff8255 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -1734,13 +1734,15 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
             } else {
                 // We need to properly build cargo using the suitable stage compiler.
 
-                // HACK: currently tool stages are off-by-one compared to compiler stages, i.e. if
-                // you give `tool::Cargo` a stage 1 rustc, it will cause stage 2 rustc to be built
-                // and produce a cargo built with stage 2 rustc. To fix this, we need to chop off
-                // the compiler stage by 1 to align with expected `./x test run-make --stage N`
-                // behavior, i.e. we need to pass `N - 1` compiler stage to cargo. See also Miri
-                // which does a similar hack.
-                let compiler = builder.compiler(builder.top_stage - 1, compiler.host);
+                let compiler = builder.download_rustc().then_some(compiler).unwrap_or_else(||
+                    // HACK: currently tool stages are off-by-one compared to compiler stages, i.e. if
+                    // you give `tool::Cargo` a stage 1 rustc, it will cause stage 2 rustc to be built
+                    // and produce a cargo built with stage 2 rustc. To fix this, we need to chop off
+                    // the compiler stage by 1 to align with expected `./x test run-make --stage N`
+                    // behavior, i.e. we need to pass `N - 1` compiler stage to cargo. See also Miri
+                    // which does a similar hack.
+                    builder.compiler(builder.top_stage - 1, compiler.host));
+
                 builder.ensure(tool::Cargo { compiler, target: compiler.host })
             };
 
@@ -3549,9 +3551,7 @@ impl Step for TestFloatParse {
         let path = self.path.to_str().unwrap();
         let crate_name = self.path.components().last().unwrap().as_os_str().to_str().unwrap();
 
-        if !builder.download_rustc() {
-            builder.ensure(compile::Std::new(compiler, self.host));
-        }
+        builder.ensure(tool::TestFloatParse { host: self.host });
 
         // Run any unit tests in the crate
         let cargo_test = tool::prepare_tool_cargo(
diff --git a/src/bootstrap/src/core/build_steps/tool.rs b/src/bootstrap/src/core/build_steps/tool.rs
index f5afa6c4c6c..50f71e167db 100644
--- a/src/bootstrap/src/core/build_steps/tool.rs
+++ b/src/bootstrap/src/core/build_steps/tool.rs
@@ -1097,6 +1097,38 @@ tool_extended!((self, builder),
     Rustfmt, "src/tools/rustfmt", "rustfmt", stable=true, add_bins_to_sysroot = ["rustfmt", "cargo-fmt"];
 );
 
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TestFloatParse {
+    pub host: TargetSelection,
+}
+
+impl Step for TestFloatParse {
+    type Output = ();
+    const ONLY_HOSTS: bool = true;
+    const DEFAULT: bool = false;
+
+    fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
+        run.path("src/etc/test-float-parse")
+    }
+
+    fn run(self, builder: &Builder<'_>) {
+        let bootstrap_host = builder.config.build;
+        let compiler = builder.compiler(builder.top_stage, bootstrap_host);
+
+        builder.ensure(ToolBuild {
+            compiler,
+            target: bootstrap_host,
+            tool: "test-float-parse",
+            mode: Mode::ToolStd,
+            path: "src/etc/test-float-parse",
+            source_type: SourceType::InTree,
+            extra_features: Vec::new(),
+            allow_features: "",
+            cargo_args: Vec::new(),
+        });
+    }
+}
+
 impl Builder<'_> {
     /// Gets a `BootstrapCommand` which is ready to run `tool` in `stage` built for
     /// `host`.
diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index 9bebe1fb4c1..0f7d4d3e8f3 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -8,7 +8,7 @@ use rustc_data_structures::unord::UnordSet;
 use rustc_errors::codes::*;
 use rustc_errors::emitter::{DynEmitter, HumanEmitter, stderr_destination};
 use rustc_errors::json::JsonEmitter;
-use rustc_errors::{DiagCtxtHandle, ErrorGuaranteed, TerminalUrl};
+use rustc_errors::{ErrorGuaranteed, TerminalUrl};
 use rustc_feature::UnstableFeatures;
 use rustc_hir::def::Res;
 use rustc_hir::def_id::{DefId, DefIdMap, DefIdSet, LocalDefId};
@@ -21,8 +21,8 @@ use rustc_middle::ty::{ParamEnv, Ty, TyCtxt};
 use rustc_session::config::{self, CrateType, ErrorOutputType, Input, ResolveDocLinks};
 pub(crate) use rustc_session::config::{Options, UnstableOptions};
 use rustc_session::{Session, lint};
+use rustc_span::source_map;
 use rustc_span::symbol::sym;
-use rustc_span::{Span, source_map};
 use tracing::{debug, info};
 
 use crate::clean::inline::build_external_trait;
@@ -381,45 +381,10 @@ pub(crate) fn run_global_ctxt(
         );
     }
 
-    fn report_deprecated_attr(name: &str, dcx: DiagCtxtHandle<'_>, sp: Span) {
-        let mut msg =
-            dcx.struct_span_warn(sp, format!("the `#![doc({name})]` attribute is deprecated"));
-        msg.note(
-            "see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
-            for more information",
-        );
-
-        if name == "no_default_passes" {
-            msg.help("`#![doc(no_default_passes)]` no longer functions; you may want to use `#![doc(document_private_items)]`");
-        } else if name.starts_with("passes") {
-            msg.help("`#![doc(passes = \"...\")]` no longer functions; you may want to use `#![doc(document_private_items)]`");
-        } else if name.starts_with("plugins") {
-            msg.warn("`#![doc(plugins = \"...\")]` no longer functions; see CVE-2018-1000622 <https://nvd.nist.gov/vuln/detail/CVE-2018-1000622>");
-        }
-
-        msg.emit();
-    }
-
     // Process all of the crate attributes, extracting plugin metadata along
     // with the passes which we are supposed to run.
     for attr in krate.module.attrs.lists(sym::doc) {
-        let dcx = ctxt.sess().dcx();
-
         let name = attr.name_or_empty();
-        // `plugins = "..."`, `no_default_passes`, and `passes = "..."` have no effect
-        if attr.is_word() && name == sym::no_default_passes {
-            report_deprecated_attr("no_default_passes", dcx, attr.span());
-        } else if attr.value_str().is_some() {
-            match name {
-                sym::passes => {
-                    report_deprecated_attr("passes = \"...\"", dcx, attr.span());
-                }
-                sym::plugins => {
-                    report_deprecated_attr("plugins = \"...\"", dcx, attr.span());
-                }
-                _ => (),
-            }
-        }
 
         if attr.is_word() && name == sym::document_private_items {
             ctxt.render_options.document_private = true;
diff --git a/src/tools/compiletest/src/header.rs b/src/tools/compiletest/src/header.rs
index 099e620ffe0..d75cdefe635 100644
--- a/src/tools/compiletest/src/header.rs
+++ b/src/tools/compiletest/src/header.rs
@@ -57,7 +57,7 @@ impl EarlyProps {
             &mut poisoned,
             testfile,
             rdr,
-            &mut |DirectiveLine { directive: ln, .. }| {
+            &mut |DirectiveLine { raw_directive: ln, .. }| {
                 parse_and_update_aux(config, ln, &mut props.aux);
                 config.parse_and_update_revisions(testfile, ln, &mut props.revisions);
             },
@@ -344,8 +344,8 @@ impl TestProps {
                 &mut poisoned,
                 testfile,
                 file,
-                &mut |DirectiveLine { header_revision, directive: ln, .. }| {
-                    if header_revision.is_some() && header_revision != test_revision {
+                &mut |directive @ DirectiveLine { raw_directive: ln, .. }| {
+                    if !directive.applies_to_test_revision(test_revision) {
                         return;
                     }
 
@@ -678,28 +678,35 @@ impl TestProps {
     }
 }
 
-/// Extract an `(Option<line_revision>, directive)` directive from a line if comment is present.
-///
-/// See [`DirectiveLine`] for a diagram.
-pub fn line_directive<'line>(
+/// If the given line begins with the appropriate comment prefix for a directive,
+/// returns a struct containing various parts of the directive.
+fn line_directive<'line>(
+    line_number: usize,
     comment: &str,
     original_line: &'line str,
-) -> Option<(Option<&'line str>, &'line str)> {
+) -> Option<DirectiveLine<'line>> {
     // Ignore lines that don't start with the comment prefix.
     let after_comment = original_line.trim_start().strip_prefix(comment)?.trim_start();
 
+    let revision;
+    let raw_directive;
+
     if let Some(after_open_bracket) = after_comment.strip_prefix('[') {
         // A comment like `//@[foo]` only applies to revision `foo`.
-        let Some((line_revision, directive)) = after_open_bracket.split_once(']') else {
+        let Some((line_revision, after_close_bracket)) = after_open_bracket.split_once(']') else {
             panic!(
                 "malformed condition directive: expected `{comment}[foo]`, found `{original_line}`"
             )
         };
 
-        Some((Some(line_revision), directive.trim_start()))
+        revision = Some(line_revision);
+        raw_directive = after_close_bracket.trim_start();
     } else {
-        Some((None, after_comment))
-    }
+        revision = None;
+        raw_directive = after_comment;
+    };
+
+    Some(DirectiveLine { line_number, revision, raw_directive })
 }
 
 // To prevent duplicating the list of commmands between `compiletest`,`htmldocck` and `jsondocck`,
@@ -730,28 +737,37 @@ const KNOWN_HTMLDOCCK_DIRECTIVE_NAMES: &[&str] = &[
 const KNOWN_JSONDOCCK_DIRECTIVE_NAMES: &[&str] =
     &["count", "!count", "has", "!has", "is", "!is", "ismany", "!ismany", "set", "!set"];
 
-/// The broken-down contents of a line containing a test header directive,
+/// The (partly) broken-down contents of a line containing a test directive,
 /// which [`iter_header`] passes to its callback function.
 ///
 /// For example:
 ///
 /// ```text
 /// //@ compile-flags: -O
-///     ^^^^^^^^^^^^^^^^^ directive
+///     ^^^^^^^^^^^^^^^^^ raw_directive
 ///
 /// //@ [foo] compile-flags: -O
-///      ^^^                    header_revision
-///           ^^^^^^^^^^^^^^^^^ directive
+///      ^^^                    revision
+///           ^^^^^^^^^^^^^^^^^ raw_directive
 /// ```
 struct DirectiveLine<'ln> {
     line_number: usize,
-    /// Some header directives start with a revision name in square brackets
+    /// Some test directives start with a revision name in square brackets
     /// (e.g. `[foo]`), and only apply to that revision of the test.
     /// If present, this field contains the revision name (e.g. `foo`).
-    header_revision: Option<&'ln str>,
-    /// The main part of the header directive, after removing the comment prefix
+    revision: Option<&'ln str>,
+    /// The main part of the directive, after removing the comment prefix
     /// and the optional revision specifier.
-    directive: &'ln str,
+    ///
+    /// This is "raw" because the directive's name and colon-separated value
+    /// (if present) have not yet been extracted or checked.
+    raw_directive: &'ln str,
+}
+
+impl<'ln> DirectiveLine<'ln> {
+    fn applies_to_test_revision(&self, test_revision: Option<&str>) -> bool {
+        self.revision.is_none() || self.revision == test_revision
+    }
 }
 
 pub(crate) struct CheckDirectiveResult<'ln> {
@@ -819,8 +835,8 @@ fn iter_header(
             "ignore-cross-compile",
         ];
         // Process the extra implied directives, with a dummy line number of 0.
-        for directive in extra_directives {
-            it(DirectiveLine { line_number: 0, header_revision: None, directive });
+        for raw_directive in extra_directives {
+            it(DirectiveLine { line_number: 0, revision: None, raw_directive });
         }
     }
 
@@ -847,24 +863,21 @@ fn iter_header(
             return;
         }
 
-        let Some((header_revision, non_revisioned_directive_line)) = line_directive(comment, ln)
-        else {
+        let Some(directive_line) = line_directive(line_number, comment, ln) else {
             continue;
         };
 
         // Perform unknown directive check on Rust files.
         if testfile.extension().map(|e| e == "rs").unwrap_or(false) {
-            let directive_ln = non_revisioned_directive_line.trim();
-
             let CheckDirectiveResult { is_known_directive, trailing_directive } =
-                check_directive(directive_ln, mode, ln);
+                check_directive(directive_line.raw_directive, mode, ln);
 
             if !is_known_directive {
                 *poisoned = true;
 
                 eprintln!(
                     "error: detected unknown compiletest test directive `{}` in {}:{}",
-                    directive_ln,
+                    directive_line.raw_directive,
                     testfile.display(),
                     line_number,
                 );
@@ -888,11 +901,7 @@ fn iter_header(
             }
         }
 
-        it(DirectiveLine {
-            line_number,
-            header_revision,
-            directive: non_revisioned_directive_line,
-        });
+        it(directive_line);
     }
 }
 
@@ -1292,8 +1301,8 @@ pub fn make_test_description<R: Read>(
         &mut local_poisoned,
         path,
         src,
-        &mut |DirectiveLine { header_revision, directive: ln, line_number }| {
-            if header_revision.is_some() && header_revision != test_revision {
+        &mut |directive @ DirectiveLine { line_number, raw_directive: ln, .. }| {
+            if !directive.applies_to_test_revision(test_revision) {
                 return;
             }
 
diff --git a/src/tools/compiletest/src/runtest/debugger.rs b/src/tools/compiletest/src/runtest/debugger.rs
index 985fe6381e8..c15422fb6f6 100644
--- a/src/tools/compiletest/src/runtest/debugger.rs
+++ b/src/tools/compiletest/src/runtest/debugger.rs
@@ -4,7 +4,6 @@ use std::io::{BufRead, BufReader};
 use std::path::{Path, PathBuf};
 
 use crate::common::Config;
-use crate::header::line_directive;
 use crate::runtest::ProcRes;
 
 /// Representation of information to invoke a debugger and check its output
@@ -24,7 +23,6 @@ impl DebuggerCommands {
         file: &Path,
         config: &Config,
         debugger_prefixes: &[&str],
-        rev: Option<&str>,
     ) -> Result<Self, String> {
         let directives = debugger_prefixes
             .iter()
@@ -39,18 +37,17 @@ impl DebuggerCommands {
         for (line_no, line) in reader.lines().enumerate() {
             counter += 1;
             let line = line.map_err(|e| format!("Error while parsing debugger commands: {}", e))?;
-            let (lnrev, line) = line_directive("//", &line).unwrap_or((None, &line));
-
-            // Skip any revision specific directive that doesn't match the current
-            // revision being tested
-            if lnrev.is_some() && lnrev != rev {
-                continue;
-            }
 
+            // Breakpoints appear on lines with actual code, typically at the end of the line.
             if line.contains("#break") {
                 breakpoint_lines.push(counter);
+                continue;
             }
 
+            let Some(line) = line.trim_start().strip_prefix("//").map(str::trim_start) else {
+                continue;
+            };
+
             for &(ref command_directive, ref check_directive) in &directives {
                 config
                     .parse_name_value_directive(&line, command_directive)
diff --git a/src/tools/compiletest/src/runtest/debuginfo.rs b/src/tools/compiletest/src/runtest/debuginfo.rs
index bd0845b4524..c621c22ac99 100644
--- a/src/tools/compiletest/src/runtest/debuginfo.rs
+++ b/src/tools/compiletest/src/runtest/debuginfo.rs
@@ -66,13 +66,8 @@ impl TestCx<'_> {
         };
 
         // Parse debugger commands etc from test files
-        let dbg_cmds = DebuggerCommands::parse_from(
-            &self.testpaths.file,
-            self.config,
-            prefixes,
-            self.revision,
-        )
-        .unwrap_or_else(|e| self.fatal(&e));
+        let dbg_cmds = DebuggerCommands::parse_from(&self.testpaths.file, self.config, prefixes)
+            .unwrap_or_else(|e| self.fatal(&e));
 
         // https://docs.microsoft.com/en-us/windows-hardware/drivers/debugger/debugger-commands
         let mut script_str = String::with_capacity(2048);
@@ -142,13 +137,8 @@ impl TestCx<'_> {
     }
 
     fn run_debuginfo_gdb_test_no_opt(&self) {
-        let dbg_cmds = DebuggerCommands::parse_from(
-            &self.testpaths.file,
-            self.config,
-            &["gdb"],
-            self.revision,
-        )
-        .unwrap_or_else(|e| self.fatal(&e));
+        let dbg_cmds = DebuggerCommands::parse_from(&self.testpaths.file, self.config, &["gdb"])
+            .unwrap_or_else(|e| self.fatal(&e));
         let mut cmds = dbg_cmds.commands.join("\n");
 
         // compile test file (it should have 'compile-flags:-g' in the header)
@@ -413,13 +403,8 @@ impl TestCx<'_> {
         }
 
         // Parse debugger commands etc from test files
-        let dbg_cmds = DebuggerCommands::parse_from(
-            &self.testpaths.file,
-            self.config,
-            &["lldb"],
-            self.revision,
-        )
-        .unwrap_or_else(|e| self.fatal(&e));
+        let dbg_cmds = DebuggerCommands::parse_from(&self.testpaths.file, self.config, &["lldb"])
+            .unwrap_or_else(|e| self.fatal(&e));
 
         // Write debugger script:
         // We don't want to hang when calling `quit` while the process is still running
diff --git a/tests/run-make/import-macro-verbatim/include/include.txt b/tests/run-make/import-macro-verbatim/include/include.txt
new file mode 100644
index 00000000000..63d71b14c1d
--- /dev/null
+++ b/tests/run-make/import-macro-verbatim/include/include.txt
@@ -0,0 +1 @@
+static TEST: &str = "Hello World!";
diff --git a/tests/run-make/import-macro-verbatim/rmake.rs b/tests/run-make/import-macro-verbatim/rmake.rs
new file mode 100644
index 00000000000..d2bf626e0aa
--- /dev/null
+++ b/tests/run-make/import-macro-verbatim/rmake.rs
@@ -0,0 +1,8 @@
+//@ only-windows other platforms do not have Windows verbatim paths
+use run_make_support::rustc;
+fn main() {
+    // Canonicalizing the path ensures that it's verbatim (i.e. starts with `\\?\`)
+    let mut path = std::fs::canonicalize(file!()).unwrap();
+    path.pop();
+    rustc().input("verbatim.rs").env("VERBATIM_DIR", path).run();
+}
diff --git a/tests/run-make/import-macro-verbatim/verbatim.rs b/tests/run-make/import-macro-verbatim/verbatim.rs
new file mode 100644
index 00000000000..56a83673c1f
--- /dev/null
+++ b/tests/run-make/import-macro-verbatim/verbatim.rs
@@ -0,0 +1,12 @@
+//! Include a file by concating the verbatim path using `/` instead of `\`
+
+include!(concat!(env!("VERBATIM_DIR"), "/include/include.txt"));
+fn main() {
+    assert_eq!(TEST, "Hello World!");
+
+    let s = include_str!(concat!(env!("VERBATIM_DIR"), "/include/include.txt"));
+    assert_eq!(s, "static TEST: &str = \"Hello World!\";\n");
+
+    let b = include_bytes!(concat!(env!("VERBATIM_DIR"), "/include/include.txt"));
+    assert_eq!(b, b"static TEST: &str = \"Hello World!\";\n");
+}
diff --git a/tests/rustdoc-ui/deprecated-attrs.rs b/tests/rustdoc-ui/deprecated-attrs.rs
index e4802ee2518..3b59e05a012 100644
--- a/tests/rustdoc-ui/deprecated-attrs.rs
+++ b/tests/rustdoc-ui/deprecated-attrs.rs
@@ -1,16 +1,21 @@
-//@ check-pass
 //@ compile-flags: --passes unknown-pass
 //@ error-pattern: the `passes` flag no longer functions
 
 #![doc(no_default_passes)]
-//~^ WARNING attribute is deprecated
+//~^ ERROR unknown `doc` attribute `no_default_passes`
+//~| NOTE no longer functions
 //~| NOTE see issue #44136
-//~| HELP no longer functions; you may want to use `#![doc(document_private_items)]`
+//~| HELP you may want to use `doc(document_private_items)`
+//~| NOTE `doc(no_default_passes)` is now a no-op
+//~| NOTE `#[deny(invalid_doc_attributes)]` on by default
 #![doc(passes = "collapse-docs unindent-comments")]
-//~^ WARNING attribute is deprecated
+//~^ ERROR unknown `doc` attribute `passes`
+//~| NOTE no longer functions
 //~| NOTE see issue #44136
-//~| HELP no longer functions; you may want to use `#![doc(document_private_items)]`
+//~| HELP you may want to use `doc(document_private_items)`
+//~| NOTE `doc(passes)` is now a no-op
 #![doc(plugins = "xxx")]
-//~^ WARNING attribute is deprecated
+//~^ ERROR unknown `doc` attribute `plugins`
 //~| NOTE see issue #44136
-//~| WARNING no longer functions; see CVE
+//~| NOTE no longer functions
+//~| NOTE `doc(plugins)` is now a no-op
diff --git a/tests/rustdoc-ui/deprecated-attrs.stderr b/tests/rustdoc-ui/deprecated-attrs.stderr
index 45b20ce70ef..a30523e7329 100644
--- a/tests/rustdoc-ui/deprecated-attrs.stderr
+++ b/tests/rustdoc-ui/deprecated-attrs.stderr
@@ -3,32 +3,35 @@ warning: the `passes` flag no longer functions
    = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
    = help: you may want to use --document-private-items
 
-warning: the `#![doc(no_default_passes)]` attribute is deprecated
-  --> $DIR/deprecated-attrs.rs:5:8
+error: unknown `doc` attribute `no_default_passes`
+  --> $DIR/deprecated-attrs.rs:4:8
    |
 LL | #![doc(no_default_passes)]
-   |        ^^^^^^^^^^^^^^^^^
+   |        ^^^^^^^^^^^^^^^^^ no longer functions
    |
-   = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
-   = help: `#![doc(no_default_passes)]` no longer functions; you may want to use `#![doc(document_private_items)]`
+   = note: `doc` attribute `no_default_passes` no longer functions; see issue #44136 <https://github.com/rust-lang/rust/issues/44136>
+   = help: you may want to use `doc(document_private_items)`
+   = note: `doc(no_default_passes)` is now a no-op
+   = note: `#[deny(invalid_doc_attributes)]` on by default
 
-warning: the `#![doc(passes = "...")]` attribute is deprecated
-  --> $DIR/deprecated-attrs.rs:9:8
+error: unknown `doc` attribute `passes`
+  --> $DIR/deprecated-attrs.rs:11:8
    |
 LL | #![doc(passes = "collapse-docs unindent-comments")]
-   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no longer functions
    |
-   = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
-   = help: `#![doc(passes = "...")]` no longer functions; you may want to use `#![doc(document_private_items)]`
+   = note: `doc` attribute `passes` no longer functions; see issue #44136 <https://github.com/rust-lang/rust/issues/44136>
+   = help: you may want to use `doc(document_private_items)`
+   = note: `doc(passes)` is now a no-op
 
-warning: the `#![doc(plugins = "...")]` attribute is deprecated
-  --> $DIR/deprecated-attrs.rs:13:8
+error: unknown `doc` attribute `plugins`
+  --> $DIR/deprecated-attrs.rs:17:8
    |
 LL | #![doc(plugins = "xxx")]
-   |        ^^^^^^^^^^^^^^^
+   |        ^^^^^^^^^^^^^^^ no longer functions
    |
-   = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
-   = warning: `#![doc(plugins = "...")]` no longer functions; see CVE-2018-1000622 <https://nvd.nist.gov/vuln/detail/CVE-2018-1000622>
+   = note: `doc` attribute `plugins` no longer functions; see issue #44136 <https://github.com/rust-lang/rust/issues/44136> and CVE-2018-1000622 <https://nvd.nist.gov/vuln/detail/CVE-2018-1000622>
+   = note: `doc(plugins)` is now a no-op
 
-warning: 3 warnings emitted
+error: aborting due to 3 previous errors
 
diff --git a/tests/ui/async-await/field-in-sync.rs b/tests/ui/async-await/field-in-sync.rs
new file mode 100644
index 00000000000..586980c6e2b
--- /dev/null
+++ b/tests/ui/async-await/field-in-sync.rs
@@ -0,0 +1,13 @@
+//@ edition: 2021
+
+struct S {
+    field: (),
+}
+
+async fn foo() -> S { todo!() }
+
+fn main() -> Result<(), ()> {
+    foo().field;
+    //~^ ERROR no field `field` on type `impl Future<Output = S>`
+    Ok(())
+}
diff --git a/tests/ui/async-await/field-in-sync.stderr b/tests/ui/async-await/field-in-sync.stderr
new file mode 100644
index 00000000000..7be30339c27
--- /dev/null
+++ b/tests/ui/async-await/field-in-sync.stderr
@@ -0,0 +1,17 @@
+error[E0609]: no field `field` on type `impl Future<Output = S>`
+  --> $DIR/field-in-sync.rs:10:11
+   |
+LL |     foo().field;
+   |           ^^^^^ field not available in `impl Future`, but it is available in its `Output`
+   |
+note: this implements `Future` and its output type has the field, but the future cannot be awaited in a synchronous function
+  --> $DIR/field-in-sync.rs:10:5
+   |
+LL | fn main() -> Result<(), ()> {
+   | --------------------------- this is not `async`
+LL |     foo().field;
+   |     ^^^^^
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0609`.
diff --git a/tests/ui/async-await/issue-61076.stderr b/tests/ui/async-await/issue-61076.stderr
index 44de282988b..b8478c8d138 100644
--- a/tests/ui/async-await/issue-61076.stderr
+++ b/tests/ui/async-await/issue-61076.stderr
@@ -28,7 +28,7 @@ error[E0609]: no field `0` on type `impl Future<Output = Tuple>`
 LL |     let _: i32 = tuple().0;
    |                          ^ field not available in `impl Future`, but it is available in its `Output`
    |
-help: consider `await`ing on the `Future` and access the field of its `Output`
+help: consider `await`ing on the `Future` to access the field
    |
 LL |     let _: i32 = tuple().await.0;
    |                         ++++++
@@ -39,7 +39,7 @@ error[E0609]: no field `a` on type `impl Future<Output = Struct>`
 LL |     let _: i32 = struct_().a;
    |                            ^ field not available in `impl Future`, but it is available in its `Output`
    |
-help: consider `await`ing on the `Future` and access the field of its `Output`
+help: consider `await`ing on the `Future` to access the field
    |
 LL |     let _: i32 = struct_().await.a;
    |                           ++++++
diff --git a/tests/ui/async-await/try-in-sync.rs b/tests/ui/async-await/try-in-sync.rs
new file mode 100644
index 00000000000..81d72c3fb9a
--- /dev/null
+++ b/tests/ui/async-await/try-in-sync.rs
@@ -0,0 +1,9 @@
+//@ edition: 2021
+
+async fn foo() -> Result<(), ()> { todo!() }
+
+fn main() -> Result<(), ()> {
+    foo()?;
+    //~^ ERROR the `?` operator can only be applied to values that implement `Try`
+    Ok(())
+}
diff --git a/tests/ui/async-await/try-in-sync.stderr b/tests/ui/async-await/try-in-sync.stderr
new file mode 100644
index 00000000000..bc7a6bd0151
--- /dev/null
+++ b/tests/ui/async-await/try-in-sync.stderr
@@ -0,0 +1,18 @@
+error[E0277]: the `?` operator can only be applied to values that implement `Try`
+  --> $DIR/try-in-sync.rs:6:5
+   |
+LL |     foo()?;
+   |     ^^^^^^ the `?` operator cannot be applied to type `impl Future<Output = Result<(), ()>>`
+   |
+   = help: the trait `Try` is not implemented for `impl Future<Output = Result<(), ()>>`
+note: this implements `Future` and its output type supports `?`, but the future cannot be awaited in a synchronous function
+  --> $DIR/try-in-sync.rs:6:10
+   |
+LL | fn main() -> Result<(), ()> {
+   | --------------------------- this is not `async`
+LL |     foo()?;
+   |          ^
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0277`.