Merging upstream version 1.69.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

71 files changed, 2156 insertions, 2676 deletions

diff --git a/src/librustdoc/Cargo.toml b/src/librustdoc/Cargo.toml
index 0271c27b4..c48f7998c 100644
--- a/src/librustdoc/Cargo.toml
+++ b/src/librustdoc/Cargo.toml
@@ -12,14 +12,12 @@ askama = { version = "0.11", default-features = false, features = ["config"] }
 itertools = "0.10.1"
 minifier = "0.2.2"
 once_cell = "1.10.0"
-pulldown-cmark = { version = "0.9.2", default-features = false }
 regex = "1"
 rustdoc-json-types = { path = "../rustdoc-json-types" }
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 smallvec = "1.8.1"
 tempfile = "3"
-thin-vec = "0.2.9"
 tracing = "0.1"
 tracing-tree = "0.2.0"
 
diff --git a/src/librustdoc/clean/auto_trait.rs b/src/librustdoc/clean/auto_trait.rs
index a302750aa..9479b3ee0 100644
--- a/src/librustdoc/clean/auto_trait.rs
+++ b/src/librustdoc/clean/auto_trait.rs
@@ -137,7 +137,7 @@ where
     pub(crate) fn get_auto_trait_impls(&mut self, item_def_id: DefId) -> Vec<Item> {
         let tcx = self.cx.tcx;
         let param_env = tcx.param_env(item_def_id);
-        let ty = tcx.type_of(item_def_id);
+        let ty = tcx.type_of(item_def_id).subst_identity();
         let f = auto_trait::AutoTraitFinder::new(tcx);
 
         debug!("get_auto_trait_impls({:?})", ty);
@@ -734,8 +734,8 @@ struct RegionReplacer<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,
 }
 
-impl<'a, 'tcx> TypeFolder<'tcx> for RegionReplacer<'a, 'tcx> {
-    fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
+impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for RegionReplacer<'a, 'tcx> {
+    fn interner(&self) -> TyCtxt<'tcx> {
         self.tcx
     }
 
diff --git a/src/librustdoc/clean/blanket_impl.rs b/src/librustdoc/clean/blanket_impl.rs
index e6b2b2349..bcdbbcacc 100644
--- a/src/librustdoc/clean/blanket_impl.rs
+++ b/src/librustdoc/clean/blanket_impl.rs
@@ -15,7 +15,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
     pub(crate) fn get_blanket_impls(&mut self, item_def_id: DefId) -> Vec<Item> {
         let cx = &mut self.cx;
         let param_env = cx.tcx.param_env(item_def_id);
-        let ty = cx.tcx.bound_type_of(item_def_id);
+        let ty = cx.tcx.type_of(item_def_id);
 
         trace!("get_blanket_impls({:?})", ty);
         let mut impls = Vec::new();
diff --git a/src/librustdoc/clean/cfg.rs b/src/librustdoc/clean/cfg.rs
index f1853f369..dd58a5b51 100644
--- a/src/librustdoc/clean/cfg.rs
+++ b/src/librustdoc/clean/cfg.rs
@@ -164,10 +164,10 @@ impl Cfg {
     /// Renders the configuration for human display, as a short HTML description.
     pub(crate) fn render_short_html(&self) -> String {
         let mut msg = Display(self, Format::ShortHtml).to_string();
-        if self.should_capitalize_first_letter() {
-            if let Some(i) = msg.find(|c: char| c.is_ascii_alphanumeric()) {
-                msg[i..i + 1].make_ascii_uppercase();
-            }
+        if self.should_capitalize_first_letter() &&
+            let Some(i) = msg.find(|c: char| c.is_ascii_alphanumeric())
+        {
+            msg[i..i + 1].make_ascii_uppercase();
         }
         msg
     }
diff --git a/src/librustdoc/clean/cfg/tests.rs b/src/librustdoc/clean/cfg/tests.rs
index 81f676724..bb62660e1 100644
--- a/src/librustdoc/clean/cfg/tests.rs
+++ b/src/librustdoc/clean/cfg/tests.rs
@@ -4,6 +4,7 @@ use rustc_ast::{LitKind, MetaItemLit, Path, StrStyle};
 use rustc_span::create_default_session_globals_then;
 use rustc_span::symbol::{kw, Ident, Symbol};
 use rustc_span::DUMMY_SP;
+use thin_vec::thin_vec;
 
 fn word_cfg(s: &str) -> Cfg {
     Cfg::Cfg(Symbol::intern(s), None)
@@ -34,7 +35,7 @@ macro_rules! dummy_meta_item_list {
     ($name:ident, [$($list:ident),* $(,)?]) => {
         MetaItem {
             path: Path::from_ident(Ident::from_str(stringify!($name))),
-            kind: MetaItemKind::List(vec![
+            kind: MetaItemKind::List(thin_vec![
                 $(
                     NestedMetaItem::MetaItem(
                         dummy_meta_item_word(stringify!($list)),
@@ -48,7 +49,7 @@ macro_rules! dummy_meta_item_list {
     ($name:ident, [$($list:expr),* $(,)?]) => {
         MetaItem {
             path: Path::from_ident(Ident::from_str(stringify!($name))),
-            kind: MetaItemKind::List(vec![
+            kind: MetaItemKind::List(thin_vec![
                 $(
                     NestedMetaItem::MetaItem($list),
                 )*
diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs
index b3b093312..148243683 100644
--- a/src/librustdoc/clean/inline.rs
+++ b/src/librustdoc/clean/inline.rs
@@ -9,7 +9,7 @@ use rustc_ast as ast;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::def_id::{DefId, LocalDefId};
+use rustc_hir::def_id::{DefId, DefIdSet, LocalDefId};
 use rustc_hir::Mutability;
 use rustc_metadata::creader::{CStore, LoadedMacro};
 use rustc_middle::ty::{self, TyCtxt};
@@ -45,7 +45,7 @@ pub(crate) fn try_inline(
     res: Res,
     name: Symbol,
     attrs: Option<&[ast::Attribute]>,
-    visited: &mut FxHashSet<DefId>,
+    visited: &mut DefIdSet,
 ) -> Option<Vec<clean::Item>> {
     let did = res.opt_def_id()?;
     if did.is_local() {
@@ -163,7 +163,7 @@ pub(crate) fn try_inline_glob(
     cx: &mut DocContext<'_>,
     res: Res,
     current_mod: LocalDefId,
-    visited: &mut FxHashSet<DefId>,
+    visited: &mut DefIdSet,
     inlined_names: &mut FxHashSet<(ItemType, Symbol)>,
 ) -> Option<Vec<clean::Item>> {
     let did = res.opt_def_id()?;
@@ -251,7 +251,7 @@ pub(crate) fn build_external_trait(cx: &mut DocContext<'_>, did: DefId) -> clean
 }
 
 fn build_external_function<'tcx>(cx: &mut DocContext<'tcx>, did: DefId) -> Box<clean::Function> {
-    let sig = cx.tcx.fn_sig(did);
+    let sig = cx.tcx.fn_sig(did).subst_identity();
 
     let late_bound_regions = sig.bound_vars().into_iter().filter_map(|var| match var {
         ty::BoundVariableKind::Region(ty::BrNamed(_, name)) if name != kw::UnderscoreLifetime => {
@@ -303,7 +303,8 @@ fn build_union(cx: &mut DocContext<'_>, did: DefId) -> clean::Union {
 
 fn build_type_alias(cx: &mut DocContext<'_>, did: DefId) -> Box<clean::Typedef> {
     let predicates = cx.tcx.explicit_predicates_of(did);
-    let type_ = clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(did)), cx, Some(did));
+    let type_ =
+        clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(did).subst_identity()), cx, Some(did));
 
     Box::new(clean::Typedef {
         type_,
@@ -390,18 +391,17 @@ pub(crate) fn build_impl(
 
     // Only inline impl if the implemented trait is
     // reachable in rustdoc generated documentation
-    if !did.is_local() {
-        if let Some(traitref) = associated_trait {
-            let did = traitref.def_id;
-            if !cx.cache.effective_visibilities.is_directly_public(tcx, did) {
-                return;
-            }
+    if !did.is_local() && let Some(traitref) = associated_trait {
+        let did = traitref.def_id;
+        if !cx.cache.effective_visibilities.is_directly_public(tcx, did) {
+            return;
+        }
 
-            if let Some(stab) = tcx.lookup_stability(did) {
-                if stab.is_unstable() && stab.feature == sym::rustc_private {
-                    return;
-                }
-            }
+        if let Some(stab) = tcx.lookup_stability(did) &&
+            stab.is_unstable() &&
+            stab.feature == sym::rustc_private
+        {
+            return;
         }
     }
 
@@ -415,7 +415,9 @@ pub(crate) fn build_impl(
 
     let for_ = match &impl_item {
         Some(impl_) => clean_ty(impl_.self_ty, cx),
-        None => clean_middle_ty(ty::Binder::dummy(tcx.type_of(did)), cx, Some(did)),
+        None => {
+            clean_middle_ty(ty::Binder::dummy(tcx.type_of(did).subst_identity()), cx, Some(did))
+        }
     };
 
     // Only inline impl if the implementing type is
@@ -525,10 +527,8 @@ pub(crate) fn build_impl(
     }
 
     while let Some(ty) = stack.pop() {
-        if let Some(did) = ty.def_id(&cx.cache) {
-            if tcx.is_doc_hidden(did) {
-                return;
-            }
+        if let Some(did) = ty.def_id(&cx.cache) && tcx.is_doc_hidden(did) {
+            return;
         }
         if let Some(generics) = ty.generics() {
             stack.extend(generics);
@@ -568,11 +568,7 @@ pub(crate) fn build_impl(
     ));
 }
 
-fn build_module(
-    cx: &mut DocContext<'_>,
-    did: DefId,
-    visited: &mut FxHashSet<DefId>,
-) -> clean::Module {
+fn build_module(cx: &mut DocContext<'_>, did: DefId, visited: &mut DefIdSet) -> clean::Module {
     let items = build_module_items(cx, did, visited, &mut FxHashSet::default(), None);
 
     let span = clean::Span::new(cx.tcx.def_span(did));
@@ -582,9 +578,9 @@ fn build_module(
 fn build_module_items(
     cx: &mut DocContext<'_>,
     did: DefId,
-    visited: &mut FxHashSet<DefId>,
+    visited: &mut DefIdSet,
     inlined_names: &mut FxHashSet<(ItemType, Symbol)>,
-    allowed_def_ids: Option<&FxHashSet<DefId>>,
+    allowed_def_ids: Option<&DefIdSet>,
 ) -> Vec<clean::Item> {
     let mut items = Vec::new();
 
@@ -659,14 +655,22 @@ pub(crate) fn print_inlined_const(tcx: TyCtxt<'_>, did: DefId) -> String {
 
 fn build_const(cx: &mut DocContext<'_>, def_id: DefId) -> clean::Constant {
     clean::Constant {
-        type_: clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(def_id)), cx, Some(def_id)),
+        type_: clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.type_of(def_id).subst_identity()),
+            cx,
+            Some(def_id),
+        ),
         kind: clean::ConstantKind::Extern { def_id },
     }
 }
 
 fn build_static(cx: &mut DocContext<'_>, did: DefId, mutable: bool) -> clean::Static {
     clean::Static {
-        type_: clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(did)), cx, Some(did)),
+        type_: clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.type_of(did).subst_identity()),
+            cx,
+            Some(did),
+        ),
         mutability: if mutable { Mutability::Mut } else { Mutability::Not },
         expr: None,
     }
diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index 0f0e16265..3edc2cd2e 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -11,18 +11,20 @@ pub(crate) mod types;
 pub(crate) mod utils;
 
 use rustc_ast as ast;
+use rustc_ast::token::{Token, TokenKind};
+use rustc_ast::tokenstream::{TokenStream, TokenTree};
 use rustc_attr as attr;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap, FxIndexSet, IndexEntry};
 use rustc_hir as hir;
 use rustc_hir::def::{CtorKind, DefKind, Res};
-use rustc_hir::def_id::{DefId, LOCAL_CRATE};
+use rustc_hir::def_id::{DefId, DefIdMap, DefIdSet, LocalDefId, LOCAL_CRATE};
 use rustc_hir::PredicateOrigin;
 use rustc_hir_analysis::hir_ty_to_ty;
 use rustc_infer::infer::region_constraints::{Constraint, RegionConstraintData};
-use rustc_middle::middle::resolve_lifetime as rl;
+use rustc_middle::middle::resolve_bound_vars as rbv;
 use rustc_middle::ty::fold::TypeFolder;
 use rustc_middle::ty::InternalSubsts;
-use rustc_middle::ty::TypeVisitable;
+use rustc_middle::ty::TypeVisitableExt;
 use rustc_middle::ty::{self, AdtKind, DefIdTree, EarlyBinder, Ty, TyCtxt};
 use rustc_middle::{bug, span_bug};
 use rustc_span::hygiene::{AstPass, MacroKind};
@@ -37,6 +39,7 @@ use std::hash::Hash;
 use std::mem;
 use thin_vec::ThinVec;
 
+use crate::clean::inline::merge_attrs;
 use crate::core::{self, DocContext, ImplTraitParam};
 use crate::formats::item_type::ItemType;
 use crate::visit_ast::Module as DocModule;
@@ -75,7 +78,7 @@ pub(crate) fn clean_doc_module<'tcx>(doc: &DocModule<'tcx>, cx: &mut DocContext<
     // This covers the case where somebody does an import which should pull in an item,
     // but there's already an item with the same namespace and same name. Rust gives
     // priority to the not-imported one, so we should, too.
-    items.extend(doc.items.iter().flat_map(|(item, renamed, import_id)| {
+    items.extend(doc.items.values().flat_map(|(item, renamed, import_id)| {
         // First, lower everything other than imports.
         if matches!(item.kind, hir::ItemKind::Use(_, hir::UseKind::Glob)) {
             return Vec::new();
@@ -88,7 +91,7 @@ pub(crate) fn clean_doc_module<'tcx>(doc: &DocModule<'tcx>, cx: &mut DocContext<
         }
         v
     }));
-    items.extend(doc.items.iter().flat_map(|(item, renamed, _)| {
+    items.extend(doc.items.values().flat_map(|(item, renamed, _)| {
         // Now we actually lower the imports, skipping everything else.
         if let hir::ItemKind::Use(path, hir::UseKind::Glob) = item.kind {
             let name = renamed.unwrap_or_else(|| cx.tcx.hir().name(item.hir_id()));
@@ -116,7 +119,8 @@ pub(crate) fn clean_doc_module<'tcx>(doc: &DocModule<'tcx>, cx: &mut DocContext<
         }
     });
 
-    Item::from_hir_id_and_parts(doc.id, Some(doc.name), ModuleItem(Module { items, span }), cx)
+    let kind = ModuleItem(Module { items, span });
+    Item::from_def_id_and_parts(doc.def_id.to_def_id(), Some(doc.name), kind, cx)
 }
 
 fn clean_generic_bound<'tcx>(
@@ -197,11 +201,11 @@ fn clean_poly_trait_ref_with_bindings<'tcx>(
 }
 
 fn clean_lifetime<'tcx>(lifetime: &hir::Lifetime, cx: &mut DocContext<'tcx>) -> Lifetime {
-    let def = cx.tcx.named_region(lifetime.hir_id);
+    let def = cx.tcx.named_bound_var(lifetime.hir_id);
     if let Some(
-        rl::Region::EarlyBound(node_id)
-        | rl::Region::LateBound(_, _, node_id)
-        | rl::Region::Free(_, node_id),
+        rbv::ResolvedArg::EarlyBound(node_id)
+        | rbv::ResolvedArg::LateBound(_, _, node_id)
+        | rbv::ResolvedArg::Free(_, node_id),
     ) = def
     {
         if let Some(lt) = cx.substs.get(&node_id).and_then(|p| p.as_lt()).cloned() {
@@ -214,7 +218,11 @@ fn clean_lifetime<'tcx>(lifetime: &hir::Lifetime, cx: &mut DocContext<'tcx>) ->
 pub(crate) fn clean_const<'tcx>(constant: &hir::ConstArg, cx: &mut DocContext<'tcx>) -> Constant {
     let def_id = cx.tcx.hir().body_owner_def_id(constant.value.body).to_def_id();
     Constant {
-        type_: clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(def_id)), cx, Some(def_id)),
+        type_: clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.type_of(def_id).subst_identity()),
+            cx,
+            Some(def_id),
+        ),
         kind: ConstantKind::Anonymous { body: constant.value.body },
     }
 }
@@ -241,6 +249,7 @@ pub(crate) fn clean_middle_region<'tcx>(region: ty::Region<'tcx>) -> Option<Life
         ty::ReLateBound(..)
         | ty::ReFree(..)
         | ty::ReVar(..)
+        | ty::ReError(_)
         | ty::RePlaceholder(..)
         | ty::ReErased => {
             debug!("cannot clean region {:?}", region);
@@ -309,10 +318,13 @@ pub(crate) fn clean_predicate<'tcx>(
         ty::PredicateKind::Clause(ty::Clause::Projection(pred)) => {
             Some(clean_projection_predicate(bound_predicate.rebind(pred), cx))
         }
+        // FIXME(generic_const_exprs): should this do something?
         ty::PredicateKind::ConstEvaluatable(..) => None,
         ty::PredicateKind::WellFormed(..) => None,
+        ty::PredicateKind::Clause(ty::Clause::ConstArgHasType(..)) => None,
 
         ty::PredicateKind::Subtype(..)
+        | ty::PredicateKind::AliasEq(..)
         | ty::PredicateKind::Coerce(..)
         | ty::PredicateKind::ObjectSafe(..)
         | ty::PredicateKind::ClosureKind(..)
@@ -382,13 +394,10 @@ fn clean_middle_term<'tcx>(
 fn clean_hir_term<'tcx>(term: &hir::Term<'tcx>, cx: &mut DocContext<'tcx>) -> Term {
     match term {
         hir::Term::Ty(ty) => Term::Type(clean_ty(ty, cx)),
-        hir::Term::Const(c) => {
-            let def_id = cx.tcx.hir().local_def_id(c.hir_id);
-            Term::Constant(clean_middle_const(
-                ty::Binder::dummy(ty::Const::from_anon_const(cx.tcx, def_id)),
-                cx,
-            ))
-        }
+        hir::Term::Const(c) => Term::Constant(clean_middle_const(
+            ty::Binder::dummy(ty::Const::from_anon_const(cx.tcx, c.def_id)),
+            cx,
+        )),
     }
 }
 
@@ -479,7 +488,7 @@ fn clean_generic_param_def<'tcx>(
         ty::GenericParamDefKind::Type { has_default, synthetic, .. } => {
             let default = if has_default {
                 Some(clean_middle_ty(
-                    ty::Binder::dummy(cx.tcx.type_of(def.def_id)),
+                    ty::Binder::dummy(cx.tcx.type_of(def.def_id).subst_identity()),
                     cx,
                     Some(def.def_id),
                 ))
@@ -501,7 +510,12 @@ fn clean_generic_param_def<'tcx>(
             GenericParamDefKind::Const {
                 did: def.def_id,
                 ty: Box::new(clean_middle_ty(
-                    ty::Binder::dummy(cx.tcx.type_of(def.def_id)),
+                    ty::Binder::dummy(
+                        cx.tcx
+                            .type_of(def.def_id)
+                            .no_bound_vars()
+                            .expect("const parameter types cannot be generic"),
+                    ),
                     cx,
                     Some(def.def_id),
                 )),
@@ -523,12 +537,11 @@ fn clean_generic_param<'tcx>(
     generics: Option<&hir::Generics<'tcx>>,
     param: &hir::GenericParam<'tcx>,
 ) -> GenericParamDef {
-    let did = cx.tcx.hir().local_def_id(param.hir_id);
     let (name, kind) = match param.kind {
         hir::GenericParamKind::Lifetime { .. } => {
             let outlives = if let Some(generics) = generics {
                 generics
-                    .outlives_for_param(did)
+                    .outlives_for_param(param.def_id)
                     .filter(|bp| !bp.in_where_clause)
                     .flat_map(|bp| bp.bounds)
                     .map(|bound| match bound {
@@ -544,7 +557,7 @@ fn clean_generic_param<'tcx>(
         hir::GenericParamKind::Type { ref default, synthetic } => {
             let bounds = if let Some(generics) = generics {
                 generics
-                    .bounds_for_param(did)
+                    .bounds_for_param(param.def_id)
                     .filter(|bp| bp.origin != PredicateOrigin::WhereClause)
                     .flat_map(|bp| bp.bounds)
                     .filter_map(|x| clean_generic_bound(x, cx))
@@ -555,7 +568,7 @@ fn clean_generic_param<'tcx>(
             (
                 param.name.ident().name,
                 GenericParamDefKind::Type {
-                    did: did.to_def_id(),
+                    did: param.def_id.to_def_id(),
                     bounds,
                     default: default.map(|t| clean_ty(t, cx)).map(Box::new),
                     synthetic,
@@ -565,12 +578,10 @@ fn clean_generic_param<'tcx>(
         hir::GenericParamKind::Const { ty, default } => (
             param.name.ident().name,
             GenericParamDefKind::Const {
-                did: did.to_def_id(),
+                did: param.def_id.to_def_id(),
                 ty: Box::new(clean_ty(ty, cx)),
-                default: default.map(|ct| {
-                    let def_id = cx.tcx.hir().local_def_id(ct.hir_id);
-                    Box::new(ty::Const::from_anon_const(cx.tcx, def_id).to_string())
-                }),
+                default: default
+                    .map(|ct| Box::new(ty::Const::from_anon_const(cx.tcx, ct.def_id).to_string())),
             },
         ),
     };
@@ -789,43 +800,43 @@ fn clean_ty_generics<'tcx>(
                 None
             })();
 
-            if let Some(param_idx) = param_idx {
-                if let Some(b) = impl_trait.get_mut(&param_idx.into()) {
-                    let p: WherePredicate = clean_predicate(*p, cx)?;
+            if let Some(param_idx) = param_idx
+                && let Some(b) = impl_trait.get_mut(&param_idx.into())
+            {
+                let p: WherePredicate = clean_predicate(*p, cx)?;
+
+                b.extend(
+                    p.get_bounds()
+                        .into_iter()
+                        .flatten()
+                        .cloned()
+                        .filter(|b| !b.is_sized_bound(cx)),
+                );
 
-                    b.extend(
-                        p.get_bounds()
+                let proj = projection.map(|p| {
+                    (
+                        clean_projection(p.map_bound(|p| p.projection_ty), cx, None),
+                        p.map_bound(|p| p.term),
+                    )
+                });
+                if let Some(((_, trait_did, name), rhs)) = proj
+                    .as_ref()
+                    .and_then(|(lhs, rhs): &(Type, _)| Some((lhs.projection()?, rhs)))
+                {
+                    // FIXME(...): Remove this unwrap()
+                    impl_trait_proj.entry(param_idx).or_default().push((
+                        trait_did,
+                        name,
+                        rhs.map_bound(|rhs| rhs.ty().unwrap()),
+                        p.get_bound_params()
                             .into_iter()
                             .flatten()
-                            .cloned()
-                            .filter(|b| !b.is_sized_bound(cx)),
-                    );
-
-                    let proj = projection.map(|p| {
-                        (
-                            clean_projection(p.map_bound(|p| p.projection_ty), cx, None),
-                            p.map_bound(|p| p.term),
-                        )
-                    });
-                    if let Some(((_, trait_did, name), rhs)) = proj
-                        .as_ref()
-                        .and_then(|(lhs, rhs): &(Type, _)| Some((lhs.projection()?, rhs)))
-                    {
-                        // FIXME(...): Remove this unwrap()
-                        impl_trait_proj.entry(param_idx).or_default().push((
-                            trait_did,
-                            name,
-                            rhs.map_bound(|rhs| rhs.ty().unwrap()),
-                            p.get_bound_params()
-                                .into_iter()
-                                .flatten()
-                                .map(|param| GenericParamDef::lifetime(param.0))
-                                .collect(),
-                        ));
-                    }
-
-                    return None;
+                            .map(|param| GenericParamDef::lifetime(param.0))
+                            .collect(),
+                    ));
                 }
+
+                return None;
             }
 
             Some(p)
@@ -888,7 +899,7 @@ fn clean_ty_generics<'tcx>(
     // `?Sized` bound for each one we didn't find to be `Sized`.
     for tp in &stripped_params {
         if let types::GenericParamDefKind::Type { .. } = tp.kind
-        && !sized_params.contains(&tp.name)
+            && !sized_params.contains(&tp.name)
         {
             where_predicates.push(WherePredicate::BoundPredicate {
                 ty: Type::Generic(tp.name),
@@ -1214,7 +1225,7 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
     let kind = match assoc_item.kind {
         ty::AssocKind::Const => {
             let ty = clean_middle_ty(
-                ty::Binder::dummy(tcx.type_of(assoc_item.def_id)),
+                ty::Binder::dummy(tcx.type_of(assoc_item.def_id).subst_identity()),
                 cx,
                 Some(assoc_item.def_id),
             );
@@ -1230,7 +1241,7 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
             }
         }
         ty::AssocKind::Fn => {
-            let sig = tcx.fn_sig(assoc_item.def_id);
+            let sig = tcx.fn_sig(assoc_item.def_id).subst_identity();
 
             let late_bound_regions = sig.bound_vars().into_iter().filter_map(|var| match var {
                 ty::BoundVariableKind::Region(ty::BrNamed(_, name))
@@ -1253,7 +1264,7 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
 
             if assoc_item.fn_has_self_parameter {
                 let self_ty = match assoc_item.container {
-                    ty::ImplContainer => tcx.type_of(assoc_item.container_id(tcx)),
+                    ty::ImplContainer => tcx.type_of(assoc_item.container_id(tcx)).subst_identity(),
                     ty::TraitContainer => tcx.types.self_param,
                 };
                 let self_arg_ty = sig.input(0).skip_binder();
@@ -1400,7 +1411,7 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
                     AssocTypeItem(
                         Box::new(Typedef {
                             type_: clean_middle_ty(
-                                ty::Binder::dummy(tcx.type_of(assoc_item.def_id)),
+                                ty::Binder::dummy(tcx.type_of(assoc_item.def_id).subst_identity()),
                                 cx,
                                 Some(assoc_item.def_id),
                             ),
@@ -1418,7 +1429,7 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
                 AssocTypeItem(
                     Box::new(Typedef {
                         type_: clean_middle_ty(
-                            ty::Binder::dummy(tcx.type_of(assoc_item.def_id)),
+                            ty::Binder::dummy(tcx.type_of(assoc_item.def_id).subst_identity()),
                             cx,
                             Some(assoc_item.def_id),
                         ),
@@ -1463,10 +1474,10 @@ fn clean_qpath<'tcx>(hir_ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> Type
             // Try to normalize `<X as Y>::T` to a type
             let ty = hir_ty_to_ty(cx.tcx, hir_ty);
             // `hir_to_ty` can return projection types with escaping vars for GATs, e.g. `<() as Trait>::Gat<'_>`
-            if !ty.has_escaping_bound_vars() {
-                if let Some(normalized_value) = normalize(cx, ty::Binder::dummy(ty)) {
-                    return clean_middle_ty(normalized_value, cx, None);
-                }
+            if !ty.has_escaping_bound_vars()
+                && let Some(normalized_value) = normalize(cx, ty::Binder::dummy(ty))
+            {
+                return clean_middle_ty(normalized_value, cx, None);
             }
 
             let trait_segments = &p.segments[..p.segments.len() - 1];
@@ -1528,7 +1539,7 @@ fn maybe_expand_private_type_alias<'tcx>(
     let hir::ItemKind::TyAlias(ty, generics) = alias else { return None };
 
     let provided_params = &path.segments.last().expect("segments were empty");
-    let mut substs = FxHashMap::default();
+    let mut substs = DefIdMap::default();
     let generic_args = provided_params.args();
 
     let mut indices: hir::GenericParamCount = Default::default();
@@ -1547,18 +1558,16 @@ fn maybe_expand_private_type_alias<'tcx>(
                     _ => None,
                 });
                 if let Some(lt) = lifetime {
-                    let lt_def_id = cx.tcx.hir().local_def_id(param.hir_id);
                     let cleaned = if !lt.is_anonymous() {
                         clean_lifetime(lt, cx)
                     } else {
                         Lifetime::elided()
                     };
-                    substs.insert(lt_def_id.to_def_id(), SubstParam::Lifetime(cleaned));
+                    substs.insert(param.def_id.to_def_id(), SubstParam::Lifetime(cleaned));
                 }
                 indices.lifetimes += 1;
             }
             hir::GenericParamKind::Type { ref default, .. } => {
-                let ty_param_def_id = cx.tcx.hir().local_def_id(param.hir_id);
                 let mut j = 0;
                 let type_ = generic_args.args.iter().find_map(|arg| match arg {
                     hir::GenericArg::Type(ty) => {
@@ -1571,17 +1580,14 @@ fn maybe_expand_private_type_alias<'tcx>(
                     _ => None,
                 });
                 if let Some(ty) = type_ {
-                    substs.insert(ty_param_def_id.to_def_id(), SubstParam::Type(clean_ty(ty, cx)));
+                    substs.insert(param.def_id.to_def_id(), SubstParam::Type(clean_ty(ty, cx)));
                 } else if let Some(default) = *default {
-                    substs.insert(
-                        ty_param_def_id.to_def_id(),
-                        SubstParam::Type(clean_ty(default, cx)),
-                    );
+                    substs
+                        .insert(param.def_id.to_def_id(), SubstParam::Type(clean_ty(default, cx)));
                 }
                 indices.types += 1;
             }
             hir::GenericParamKind::Const { .. } => {
-                let const_param_def_id = cx.tcx.hir().local_def_id(param.hir_id);
                 let mut j = 0;
                 let const_ = generic_args.args.iter().find_map(|arg| match arg {
                     hir::GenericArg::Const(ct) => {
@@ -1595,7 +1601,7 @@ fn maybe_expand_private_type_alias<'tcx>(
                 });
                 if let Some(ct) = const_ {
                     substs.insert(
-                        const_param_def_id.to_def_id(),
+                        param.def_id.to_def_id(),
                         SubstParam::Constant(clean_const(ct, cx)),
                     );
                 }
@@ -1623,7 +1629,6 @@ pub(crate) fn clean_ty<'tcx>(ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> T
             let length = match length {
                 hir::ArrayLen::Infer(_, _) => "_".to_string(),
                 hir::ArrayLen::Body(anon_const) => {
-                    let def_id = cx.tcx.hir().local_def_id(anon_const.hir_id);
                     // NOTE(min_const_generics): We can't use `const_eval_poly` for constants
                     // as we currently do not supply the parent generics to anonymous constants
                     // but do allow `ConstKind::Param`.
@@ -1631,8 +1636,8 @@ pub(crate) fn clean_ty<'tcx>(ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> T
                     // `const_eval_poly` tries to first substitute generic parameters which
                     // results in an ICE while manually constructing the constant and using `eval`
                     // does nothing for `ConstKind::Param`.
-                    let ct = ty::Const::from_anon_const(cx.tcx, def_id);
-                    let param_env = cx.tcx.param_env(def_id);
+                    let ct = ty::Const::from_anon_const(cx.tcx, anon_const.def_id);
+                    let param_env = cx.tcx.param_env(anon_const.def_id);
                     print_const(cx, ct.eval(cx.tcx, param_env))
                 }
             };
@@ -1657,7 +1662,7 @@ pub(crate) fn clean_ty<'tcx>(ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> T
         }
         TyKind::BareFn(barefn) => BareFunction(Box::new(clean_bare_fn_ty(barefn, cx))),
         // Rustdoc handles `TyKind::Err`s by turning them into `Type::Infer`s.
-        TyKind::Infer | TyKind::Err | TyKind::Typeof(..) => Infer,
+        TyKind::Infer | TyKind::Err(_) | TyKind::Typeof(..) => Infer,
     }
 }
 
@@ -1854,6 +1859,7 @@ pub(crate) fn clean_middle_ty<'tcx>(
         ty::Bound(..) => panic!("Bound"),
         ty::Placeholder(..) => panic!("Placeholder"),
         ty::GeneratorWitness(..) => panic!("GeneratorWitness"),
+        ty::GeneratorWitnessMIR(..) => panic!("GeneratorWitnessMIR"),
         ty::Infer(..) => panic!("Infer"),
         ty::Error(_) => rustc_errors::FatalError.raise(),
     }
@@ -1885,11 +1891,9 @@ fn clean_middle_opaque_bounds<'tcx>(
                 _ => return None,
             };
 
-            if let Some(sized) = cx.tcx.lang_items().sized_trait() {
-                if trait_ref.def_id() == sized {
-                    has_sized = true;
-                    return None;
-                }
+            if let Some(sized) = cx.tcx.lang_items().sized_trait() && trait_ref.def_id() == sized {
+                has_sized = true;
+                return None;
             }
 
             let bindings: ThinVec<_> = bounds
@@ -1928,15 +1932,18 @@ fn clean_middle_opaque_bounds<'tcx>(
 }
 
 pub(crate) fn clean_field<'tcx>(field: &hir::FieldDef<'tcx>, cx: &mut DocContext<'tcx>) -> Item {
-    let def_id = cx.tcx.hir().local_def_id(field.hir_id).to_def_id();
-    clean_field_with_def_id(def_id, field.ident.name, clean_ty(field.ty, cx), cx)
+    clean_field_with_def_id(field.def_id.to_def_id(), field.ident.name, clean_ty(field.ty, cx), cx)
 }
 
 pub(crate) fn clean_middle_field<'tcx>(field: &ty::FieldDef, cx: &mut DocContext<'tcx>) -> Item {
     clean_field_with_def_id(
         field.did,
         field.name,
-        clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(field.did)), cx, Some(field.did)),
+        clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.type_of(field.did).subst_identity()),
+            cx,
+            Some(field.did),
+        ),
         cx,
     )
 }
@@ -1979,10 +1986,8 @@ fn clean_variant_data<'tcx>(
     disr_expr: &Option<hir::AnonConst>,
     cx: &mut DocContext<'tcx>,
 ) -> Variant {
-    let discriminant = disr_expr.map(|disr| Discriminant {
-        expr: Some(disr.body),
-        value: cx.tcx.hir().local_def_id(disr.hir_id).to_def_id(),
-    });
+    let discriminant = disr_expr
+        .map(|disr| Discriminant { expr: Some(disr.body), value: disr.def_id.to_def_id() });
 
     let kind = match variant {
         hir::VariantData::Struct(..) => VariantKind::Struct(VariantStruct {
@@ -2067,12 +2072,12 @@ struct OneLevelVisitor<'hir> {
     map: rustc_middle::hir::map::Map<'hir>,
     item: Option<&'hir hir::Item<'hir>>,
     looking_for: Ident,
-    target_hir_id: hir::HirId,
+    target_def_id: LocalDefId,
 }
 
 impl<'hir> OneLevelVisitor<'hir> {
-    fn new(map: rustc_middle::hir::map::Map<'hir>, target_hir_id: hir::HirId) -> Self {
-        Self { map, item: None, looking_for: Ident::empty(), target_hir_id }
+    fn new(map: rustc_middle::hir::map::Map<'hir>, target_def_id: LocalDefId) -> Self {
+        Self { map, item: None, looking_for: Ident::empty(), target_def_id }
     }
 
     fn reset(&mut self, looking_for: Ident) {
@@ -2091,8 +2096,8 @@ impl<'hir> hir::intravisit::Visitor<'hir> for OneLevelVisitor<'hir> {
     fn visit_item(&mut self, item: &'hir hir::Item<'hir>) {
         if self.item.is_none()
             && item.ident == self.looking_for
-            && matches!(item.kind, hir::ItemKind::Use(_, _))
-            || item.hir_id() == self.target_hir_id
+            && (matches!(item.kind, hir::ItemKind::Use(_, _))
+                || item.owner_id.def_id == self.target_def_id)
         {
             self.item = Some(item);
         }
@@ -2106,41 +2111,168 @@ impl<'hir> hir::intravisit::Visitor<'hir> for OneLevelVisitor<'hir> {
 fn get_all_import_attributes<'hir>(
     mut item: &hir::Item<'hir>,
     tcx: TyCtxt<'hir>,
-    target_hir_id: hir::HirId,
+    target_def_id: LocalDefId,
     attributes: &mut Vec<ast::Attribute>,
+    is_inline: bool,
 ) {
+    let mut first = true;
     let hir_map = tcx.hir();
-    let mut visitor = OneLevelVisitor::new(hir_map, target_hir_id);
+    let mut visitor = OneLevelVisitor::new(hir_map, target_def_id);
     let mut visited = FxHashSet::default();
+
     // If the item is an import and has at least a path with two parts, we go into it.
-    while let hir::ItemKind::Use(path, _) = item.kind &&
-        path.segments.len() > 1 &&
-        let hir::def::Res::Def(_, def_id) = path.segments[path.segments.len() - 2].res &&
-        visited.insert(def_id)
-    {
-        if let Some(hir::Node::Item(parent_item)) = hir_map.get_if_local(def_id) {
-            // We add the attributes from this import into the list.
+    while let hir::ItemKind::Use(path, _) = item.kind && visited.insert(item.hir_id()) {
+        if first {
+            // This is the "original" reexport so we get all its attributes without filtering them.
             attributes.extend_from_slice(hir_map.attrs(item.hir_id()));
-            // We get the `Ident` we will be looking for into `item`.
-            let looking_for = path.segments[path.segments.len() - 1].ident;
-            visitor.reset(looking_for);
-            hir::intravisit::walk_item(&mut visitor, parent_item);
-            if let Some(i) = visitor.item {
-                item = i;
-            } else {
-                break;
+            first = false;
+        } else {
+            add_without_unwanted_attributes(attributes, hir_map.attrs(item.hir_id()), is_inline);
+        }
+
+        let def_id = if let [.., parent_segment, _] = &path.segments {
+            match parent_segment.res {
+                hir::def::Res::Def(_, def_id) => def_id,
+                _ if parent_segment.ident.name == kw::Crate => {
+                    // In case the "parent" is the crate, it'll give `Res::Err` so we need to
+                    // circumvent it this way.
+                    tcx.parent(item.owner_id.def_id.to_def_id())
+                }
+                _ => break,
             }
         } else {
+            // If the path doesn't have a parent, then the parent is the current module.
+            tcx.parent(item.owner_id.def_id.to_def_id())
+        };
+
+        let Some(parent) = hir_map.get_if_local(def_id) else { break };
+
+        // We get the `Ident` we will be looking for into `item`.
+        let looking_for = path.segments[path.segments.len() - 1].ident;
+        visitor.reset(looking_for);
+
+        match parent {
+            hir::Node::Item(parent_item) => {
+                hir::intravisit::walk_item(&mut visitor, parent_item);
+            }
+            hir::Node::Crate(m) => {
+                hir::intravisit::walk_mod(
+                    &mut visitor,
+                    m,
+                    tcx.local_def_id_to_hir_id(def_id.as_local().unwrap()),
+                );
+            }
+            _ => break,
+        }
+        if let Some(i) = visitor.item {
+            item = i;
+        } else {
             break;
         }
     }
 }
 
+fn filter_tokens_from_list(
+    args_tokens: TokenStream,
+    should_retain: impl Fn(&TokenTree) -> bool,
+) -> Vec<TokenTree> {
+    let mut tokens = Vec::with_capacity(args_tokens.len());
+    let mut skip_next_comma = false;
+    for token in args_tokens.into_trees() {
+        match token {
+            TokenTree::Token(Token { kind: TokenKind::Comma, .. }, _) if skip_next_comma => {
+                skip_next_comma = false;
+            }
+            token if should_retain(&token) => {
+                skip_next_comma = false;
+                tokens.push(token);
+            }
+            _ => {
+                skip_next_comma = true;
+            }
+        }
+    }
+    tokens
+}
+
+/// When inlining items, we merge its attributes (and all the reexports attributes too) with the
+/// final reexport. For example:
+///
+/// ```ignore (just an example)
+/// #[doc(hidden, cfg(feature = "foo"))]
+/// pub struct Foo;
+///
+/// #[doc(cfg(feature = "bar"))]
+/// #[doc(hidden, no_inline)]
+/// pub use Foo as Foo1;
+///
+/// #[doc(inline)]
+/// pub use Foo2 as Bar;
+/// ```
+///
+/// So `Bar` at the end will have both `cfg(feature = "...")`. However, we don't want to merge all
+/// attributes so we filter out the following ones:
+/// * `doc(inline)`
+/// * `doc(no_inline)`
+/// * `doc(hidden)`
+fn add_without_unwanted_attributes(
+    attrs: &mut Vec<ast::Attribute>,
+    new_attrs: &[ast::Attribute],
+    is_inline: bool,
+) {
+    // If it's `#[doc(inline)]`, we don't want all attributes, otherwise we keep everything.
+    if !is_inline {
+        attrs.extend_from_slice(new_attrs);
+        return;
+    }
+    for attr in new_attrs {
+        let mut attr = attr.clone();
+        match attr.kind {
+            ast::AttrKind::Normal(ref mut normal) => {
+                if let [ident] = &*normal.item.path.segments &&
+                    let ident = ident.ident.name &&
+                    ident == sym::doc
+                {
+                    match normal.item.args {
+                        ast::AttrArgs::Delimited(ref mut args) => {
+                            let tokens =
+                                filter_tokens_from_list(args.tokens.clone(), |token| {
+                                    !matches!(
+                                        token,
+                                        TokenTree::Token(
+                                            Token {
+                                                kind: TokenKind::Ident(
+                                                    sym::hidden | sym::inline | sym::no_inline,
+                                                    _,
+                                                ),
+                                                ..
+                                            },
+                                            _,
+                                        ),
+                                    )
+                                });
+                            args.tokens = TokenStream::new(tokens);
+                            attrs.push(attr);
+                        }
+                        ast::AttrArgs::Empty | ast::AttrArgs::Eq(..) => {
+                            attrs.push(attr);
+                            continue;
+                        }
+                    }
+                }
+            }
+            ast::AttrKind::DocComment(..) => {
+                attrs.push(attr);
+            }
+        }
+    }
+}
+
 fn clean_maybe_renamed_item<'tcx>(
     cx: &mut DocContext<'tcx>,
     item: &hir::Item<'tcx>,
     renamed: Option<Symbol>,
-    import_id: Option<hir::HirId>,
+    import_id: Option<LocalDefId>,
 ) -> Vec<Item> {
     use hir::ItemKind;
 
@@ -2185,7 +2317,7 @@ fn clean_maybe_renamed_item<'tcx>(
                 generics: clean_generics(generics, cx),
                 fields: variant_data.fields().iter().map(|x| clean_field(x, cx)).collect(),
             }),
-            ItemKind::Impl(impl_) => return clean_impl(impl_, item.hir_id(), cx),
+            ItemKind::Impl(impl_) => return clean_impl(impl_, item.owner_id.def_id, cx),
             // proc macros can have a name set by attributes
             ItemKind::Fn(ref sig, generics, body_id) => {
                 clean_fn_or_proc_macro(item, sig, generics, body_id, &mut name, cx)
@@ -2218,40 +2350,38 @@ fn clean_maybe_renamed_item<'tcx>(
             _ => unreachable!("not yet converted"),
         };
 
-        let mut extra_attrs = Vec::new();
-        if let Some(hir::Node::Item(use_node)) =
-            import_id.and_then(|hir_id| cx.tcx.hir().find(hir_id))
+        let mut import_attrs = Vec::new();
+        let mut target_attrs = Vec::new();
+        if let Some(import_id) = import_id &&
+            let Some(hir::Node::Item(use_node)) = cx.tcx.hir().find_by_def_id(import_id)
         {
-            // We get all the various imports' attributes.
-            get_all_import_attributes(use_node, cx.tcx, item.hir_id(), &mut extra_attrs);
-        }
-
-        if !extra_attrs.is_empty() {
-            extra_attrs.extend_from_slice(inline::load_attrs(cx, def_id));
-            let attrs = Attributes::from_ast(&extra_attrs);
-            let cfg = extra_attrs.cfg(cx.tcx, &cx.cache.hidden_cfg);
-
-            vec![Item::from_def_id_and_attrs_and_parts(
-                def_id,
-                Some(name),
-                kind,
-                Box::new(attrs),
-                cfg,
-            )]
+            let is_inline = inline::load_attrs(cx, import_id.to_def_id()).lists(sym::doc).get_word_attr(sym::inline).is_some();
+            // Then we get all the various imports' attributes.
+            get_all_import_attributes(use_node, cx.tcx, item.owner_id.def_id, &mut import_attrs, is_inline);
+            add_without_unwanted_attributes(&mut target_attrs, inline::load_attrs(cx, def_id), is_inline);
         } else {
-            vec![Item::from_def_id_and_parts(def_id, Some(name), kind, cx)]
+            // We only keep the item's attributes.
+            target_attrs.extend_from_slice(inline::load_attrs(cx, def_id));
         }
+
+        let import_parent = import_id.map(|import_id| cx.tcx.local_parent(import_id).to_def_id());
+        let (attrs, cfg) =  merge_attrs(cx, import_parent, &target_attrs, Some(&import_attrs));
+
+        let mut item =
+            Item::from_def_id_and_attrs_and_parts(def_id, Some(name), kind, Box::new(attrs), cfg);
+        item.inline_stmt_id = import_id.map(|def_id| def_id.to_def_id());
+        vec![item]
     })
 }
 
 fn clean_variant<'tcx>(variant: &hir::Variant<'tcx>, cx: &mut DocContext<'tcx>) -> Item {
     let kind = VariantItem(clean_variant_data(&variant.data, &variant.disr_expr, cx));
-    Item::from_hir_id_and_parts(variant.hir_id, Some(variant.ident.name), kind, cx)
+    Item::from_def_id_and_parts(variant.def_id.to_def_id(), Some(variant.ident.name), kind, cx)
 }
 
 fn clean_impl<'tcx>(
     impl_: &hir::Impl<'tcx>,
-    hir_id: hir::HirId,
+    def_id: LocalDefId,
     cx: &mut DocContext<'tcx>,
 ) -> Vec<Item> {
     let tcx = cx.tcx;
@@ -2262,7 +2392,6 @@ fn clean_impl<'tcx>(
         .iter()
         .map(|ii| clean_impl_item(tcx.hir().impl_item(ii.id), cx))
         .collect::<Vec<_>>();
-    let def_id = tcx.hir().local_def_id(hir_id);
 
     // If this impl block is an implementation of the Deref trait, then we
     // need to try inlining the target's inherent impl blocks as well.
@@ -2272,9 +2401,11 @@ fn clean_impl<'tcx>(
 
     let for_ = clean_ty(impl_.self_ty, cx);
     let type_alias = for_.def_id(&cx.cache).and_then(|did| match tcx.def_kind(did) {
-        DefKind::TyAlias => {
-            Some(clean_middle_ty(ty::Binder::dummy(tcx.type_of(did)), cx, Some(did)))
-        }
+        DefKind::TyAlias => Some(clean_middle_ty(
+            ty::Binder::dummy(tcx.type_of(did).subst_identity()),
+            cx,
+            Some(did),
+        )),
         _ => None,
     });
     let mut make_item = |trait_: Option<Path>, for_: Type, items: Vec<Item>| {
@@ -2291,7 +2422,7 @@ fn clean_impl<'tcx>(
                 ImplKind::Normal
             },
         }));
-        Item::from_hir_id_and_parts(hir_id, None, kind, cx)
+        Item::from_def_id_and_parts(def_id.to_def_id(), None, kind, cx)
     };
     if let Some(type_alias) = type_alias {
         ret.push(make_item(trait_.clone(), type_alias, items.clone()));
@@ -2323,7 +2454,7 @@ fn clean_extern_crate<'tcx>(
 
     let krate_owner_def_id = krate.owner_id.to_def_id();
     if please_inline {
-        let mut visited = FxHashSet::default();
+        let mut visited = DefIdSet::default();
 
         let res = Res::Def(DefKind::Mod, crate_def_id);
 
@@ -2405,17 +2536,15 @@ fn clean_use_statement_inner<'tcx>(
     let is_visible_from_parent_mod =
         visibility.is_accessible_from(parent_mod, cx.tcx) && !current_mod.is_top_level_module();
 
-    if pub_underscore {
-        if let Some(ref inline) = inline_attr {
-            rustc_errors::struct_span_err!(
-                cx.tcx.sess,
-                inline.span(),
-                E0780,
-                "anonymous imports cannot be inlined"
-            )
-            .span_label(import.span, "anonymous import")
-            .emit();
-        }
+    if pub_underscore && let Some(ref inline) = inline_attr {
+        rustc_errors::struct_span_err!(
+            cx.tcx.sess,
+            inline.span(),
+            E0780,
+            "anonymous imports cannot be inlined"
+        )
+        .span_label(import.span, "anonymous import")
+        .emit();
     }
 
     // We consider inlining the documentation of `pub use` statements, but we
@@ -2442,7 +2571,7 @@ fn clean_use_statement_inner<'tcx>(
     let path = clean_path(path, cx);
     let inner = if kind == hir::UseKind::Glob {
         if !denied {
-            let mut visited = FxHashSet::default();
+            let mut visited = DefIdSet::default();
             if let Some(items) =
                 inline::try_inline_glob(cx, path.res, current_mod, &mut visited, inlined_names)
             {
@@ -2451,17 +2580,16 @@ fn clean_use_statement_inner<'tcx>(
         }
         Import::new_glob(resolve_use_source(cx, path), true)
     } else {
-        if inline_attr.is_none() {
-            if let Res::Def(DefKind::Mod, did) = path.res {
-                if !did.is_local() && did.is_crate_root() {
-                    // if we're `pub use`ing an extern crate root, don't inline it unless we
-                    // were specifically asked for it
-                    denied = true;
-                }
-            }
+        if inline_attr.is_none()
+            && let Res::Def(DefKind::Mod, did) = path.res
+            && !did.is_local() && did.is_crate_root()
+        {
+            // if we're `pub use`ing an extern crate root, don't inline it unless we
+            // were specifically asked for it
+            denied = true;
         }
         if !denied {
-            let mut visited = FxHashSet::default();
+            let mut visited = DefIdSet::default();
             let import_def_id = import.owner_id.to_def_id();
 
             if let Some(mut items) = inline::try_inline(
@@ -2512,8 +2640,8 @@ fn clean_maybe_renamed_foreign_item<'tcx>(
             hir::ForeignItemKind::Type => ForeignTypeItem,
         };
 
-        Item::from_hir_id_and_parts(
-            item.hir_id(),
+        Item::from_def_id_and_parts(
+            item.owner_id.def_id.to_def_id(),
             Some(renamed.unwrap_or(item.ident.name)),
             kind,
             cx,
diff --git a/src/librustdoc/clean/render_macro_matchers.rs b/src/librustdoc/clean/render_macro_matchers.rs
index ed7683e36..ef38ca3c1 100644
--- a/src/librustdoc/clean/render_macro_matchers.rs
+++ b/src/librustdoc/clean/render_macro_matchers.rs
@@ -63,7 +63,8 @@ fn snippet_equal_to_token(tcx: TyCtxt<'_>, matcher: &TokenTree) -> Option<String
     let snippet = source_map.span_to_snippet(span).ok()?;
 
     // Create a Parser.
-    let sess = ParseSess::new(FilePathMapping::empty());
+    let sess =
+        ParseSess::new(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), FilePathMapping::empty());
     let file_name = source_map.span_to_filename(span);
     let mut parser =
         match rustc_parse::maybe_new_parser_from_source_str(&sess, file_name, snippet.clone()) {
diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs
index 87de41fde..27d18aad7 100644
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@@ -5,13 +5,12 @@ use std::path::PathBuf;
 use std::rc::Rc;
 use std::sync::Arc;
 use std::sync::OnceLock as OnceCell;
-use std::{cmp, fmt, iter};
+use std::{fmt, iter};
 
 use arrayvec::ArrayVec;
 use thin_vec::ThinVec;
 
-use rustc_ast::util::comments::beautify_doc_string;
-use rustc_ast::{self as ast, AttrStyle};
+use rustc_ast as ast;
 use rustc_attr::{ConstStability, Deprecation, Stability, StabilityLevel};
 use rustc_const_eval::const_eval::is_unstable_const_fn;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
@@ -24,6 +23,7 @@ use rustc_hir_analysis::check::intrinsic::intrinsic_operation_unsafety;
 use rustc_index::vec::IndexVec;
 use rustc_middle::ty::fast_reject::SimplifiedType;
 use rustc_middle::ty::{self, DefIdTree, TyCtxt, Visibility};
+use rustc_resolve::rustdoc::{add_doc_fragment, attrs_to_doc_fragments, inner_docs, DocFragment};
 use rustc_session::Session;
 use rustc_span::hygiene::MacroKind;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
@@ -182,10 +182,8 @@ impl ExternalCrate {
             return Local;
         }
 
-        if extern_url_takes_precedence {
-            if let Some(url) = extern_url {
-                return to_remote(url);
-            }
+        if extern_url_takes_precedence && let Some(url) = extern_url {
+            return to_remote(url);
         }
 
         // Failing that, see if there's an attribute specifying where to find this
@@ -405,7 +403,7 @@ impl Item {
     pub(crate) fn inner_docs(&self, tcx: TyCtxt<'_>) -> bool {
         self.item_id
             .as_def_id()
-            .map(|did| tcx.get_attrs_unchecked(did).inner_docs())
+            .map(|did| inner_docs(tcx.get_attrs_unchecked(did)))
             .unwrap_or(false)
     }
 
@@ -439,17 +437,6 @@ impl Item {
         self.attrs.doc_value()
     }
 
-    /// Convenience wrapper around [`Self::from_def_id_and_parts`] which converts
-    /// `hir_id` to a [`DefId`]
-    pub(crate) fn from_hir_id_and_parts(
-        hir_id: hir::HirId,
-        name: Option<Symbol>,
-        kind: ItemKind,
-        cx: &mut DocContext<'_>,
-    ) -> Item {
-        Item::from_def_id_and_parts(cx.tcx.hir().local_def_id(hir_id).to_def_id(), name, kind, cx)
-    }
-
     pub(crate) fn from_def_id_and_parts(
         def_id: DefId,
         name: Option<Symbol>,
@@ -493,16 +480,16 @@ impl Item {
     }
 
     pub(crate) fn links(&self, cx: &Context<'_>) -> Vec<RenderedLink> {
-        use crate::html::format::href;
+        use crate::html::format::{href, link_tooltip};
 
         cx.cache()
             .intra_doc_links
             .get(&self.item_id)
             .map_or(&[][..], |v| v.as_slice())
             .iter()
-            .filter_map(|ItemLink { link: s, link_text, page_id: did, ref fragment }| {
-                debug!(?did);
-                if let Ok((mut href, ..)) = href(*did, cx) {
+            .filter_map(|ItemLink { link: s, link_text, page_id: id, ref fragment }| {
+                debug!(?id);
+                if let Ok((mut href, ..)) = href(*id, cx) {
                     debug!(?href);
                     if let Some(ref fragment) = *fragment {
                         fragment.render(&mut href, cx.tcx())
@@ -510,6 +497,7 @@ impl Item {
                     Some(RenderedLink {
                         original_text: s.clone(),
                         new_text: link_text.clone(),
+                        tooltip: link_tooltip(*id, fragment, cx),
                         href,
                     })
                 } else {
@@ -534,6 +522,7 @@ impl Item {
                 original_text: s.clone(),
                 new_text: link_text.clone(),
                 href: String::new(),
+                tooltip: String::new(),
             })
             .collect()
     }
@@ -665,7 +654,7 @@ impl Item {
             tcx: TyCtxt<'_>,
             asyncness: hir::IsAsync,
         ) -> hir::FnHeader {
-            let sig = tcx.fn_sig(def_id);
+            let sig = tcx.fn_sig(def_id).skip_binder();
             let constness =
                 if tcx.is_const_fn(def_id) && is_unstable_const_fn(tcx, def_id).is_none() {
                     hir::Constness::Const
@@ -677,7 +666,7 @@ impl Item {
         let header = match *self.kind {
             ItemKind::ForeignFunctionItem(_) => {
                 let def_id = self.item_id.as_def_id().unwrap();
-                let abi = tcx.fn_sig(def_id).abi();
+                let abi = tcx.fn_sig(def_id).skip_binder().abi();
                 hir::FnHeader {
                     unsafety: if abi == Abi::RustIntrinsic {
                         intrinsic_operation_unsafety(tcx, self.item_id.as_def_id().unwrap())
@@ -885,8 +874,6 @@ pub(crate) trait AttributesExt {
 
     fn span(&self) -> Option<rustc_span::Span>;
 
-    fn inner_docs(&self) -> bool;
-
     fn cfg(&self, tcx: TyCtxt<'_>, hidden_cfg: &FxHashSet<Cfg>) -> Option<Arc<Cfg>>;
 }
 
@@ -905,14 +892,6 @@ impl AttributesExt for [ast::Attribute] {
         self.iter().find(|attr| attr.doc_str().is_some()).map(|attr| attr.span)
     }
 
-    /// Returns whether the first doc-comment is an inner attribute.
-    ///
-    //// If there are no doc-comments, return true.
-    /// FIXME(#78591): Support both inner and outer attributes on the same item.
-    fn inner_docs(&self) -> bool {
-        self.iter().find(|a| a.doc_str().is_some()).map_or(true, |a| a.style == AttrStyle::Inner)
-    }
-
     fn cfg(&self, tcx: TyCtxt<'_>, hidden_cfg: &FxHashSet<Cfg>) -> Option<Arc<Cfg>> {
         let sess = tcx.sess;
         let doc_cfg_active = tcx.features().doc_cfg;
@@ -1021,58 +1000,6 @@ impl<I: Iterator<Item = ast::NestedMetaItem>> NestedAttributesExt for I {
     }
 }
 
-/// A portion of documentation, extracted from a `#[doc]` attribute.
-///
-/// Each variant contains the line number within the complete doc-comment where the fragment
-/// starts, as well as the Span where the corresponding doc comment or attribute is located.
-///
-/// Included files are kept separate from inline doc comments so that proper line-number
-/// information can be given when a doctest fails. Sugared doc comments and "raw" doc comments are
-/// kept separate because of issue #42760.
-#[derive(Clone, PartialEq, Eq, Debug)]
-pub(crate) struct DocFragment {
-    pub(crate) span: rustc_span::Span,
-    /// The module this doc-comment came from.
-    ///
-    /// This allows distinguishing between the original documentation and a pub re-export.
-    /// If it is `None`, the item was not re-exported.
-    pub(crate) parent_module: Option<DefId>,
-    pub(crate) doc: Symbol,
-    pub(crate) kind: DocFragmentKind,
-    pub(crate) indent: usize,
-}
-
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
-pub(crate) enum DocFragmentKind {
-    /// A doc fragment created from a `///` or `//!` doc comment.
-    SugaredDoc,
-    /// A doc fragment created from a "raw" `#[doc=""]` attribute.
-    RawDoc,
-}
-
-/// The goal of this function is to apply the `DocFragment` transformation that is required when
-/// transforming into the final Markdown, which is applying the computed indent to each line in
-/// each doc fragment (a `DocFragment` can contain multiple lines in case of `#[doc = ""]`).
-///
-/// Note: remove the trailing newline where appropriate
-fn add_doc_fragment(out: &mut String, frag: &DocFragment) {
-    let s = frag.doc.as_str();
-    let mut iter = s.lines();
-    if s.is_empty() {
-        out.push('\n');
-        return;
-    }
-    while let Some(line) = iter.next() {
-        if line.chars().any(|c| !c.is_whitespace()) {
-            assert!(line.len() >= frag.indent);
-            out.push_str(&line[frag.indent..]);
-        } else {
-            out.push_str(line);
-        }
-        out.push('\n');
-    }
-}
-
 /// Collapse a collection of [`DocFragment`]s into one string,
 /// handling indentation and newlines as needed.
 pub(crate) fn collapse_doc_fragments(doc_strings: &[DocFragment]) -> String {
@@ -1084,98 +1011,18 @@ pub(crate) fn collapse_doc_fragments(doc_strings: &[DocFragment]) -> String {
     acc
 }
 
-/// Removes excess indentation on comments in order for the Markdown
-/// to be parsed correctly. This is necessary because the convention for
-/// writing documentation is to provide a space between the /// or //! marker
-/// and the doc text, but Markdown is whitespace-sensitive. For example,
-/// a block of text with four-space indentation is parsed as a code block,
-/// so if we didn't unindent comments, these list items
-///
-/// /// A list:
-/// ///
-/// ///    - Foo
-/// ///    - Bar
-///
-/// would be parsed as if they were in a code block, which is likely not what the user intended.
-fn unindent_doc_fragments(docs: &mut Vec<DocFragment>) {
-    // `add` is used in case the most common sugared doc syntax is used ("/// "). The other
-    // fragments kind's lines are never starting with a whitespace unless they are using some
-    // markdown formatting requiring it. Therefore, if the doc block have a mix between the two,
-    // we need to take into account the fact that the minimum indent minus one (to take this
-    // whitespace into account).
-    //
-    // For example:
-    //
-    // /// hello!
-    // #[doc = "another"]
-    //
-    // In this case, you want "hello! another" and not "hello!  another".
-    let add = if docs.windows(2).any(|arr| arr[0].kind != arr[1].kind)
-        && docs.iter().any(|d| d.kind == DocFragmentKind::SugaredDoc)
-    {
-        // In case we have a mix of sugared doc comments and "raw" ones, we want the sugared one to
-        // "decide" how much the minimum indent will be.
-        1
-    } else {
-        0
-    };
-
-    // `min_indent` is used to know how much whitespaces from the start of each lines must be
-    // removed. Example:
-    //
-    // ///     hello!
-    // #[doc = "another"]
-    //
-    // In here, the `min_indent` is 1 (because non-sugared fragment are always counted with minimum
-    // 1 whitespace), meaning that "hello!" will be considered a codeblock because it starts with 4
-    // (5 - 1) whitespaces.
-    let Some(min_indent) = docs
-        .iter()
-        .map(|fragment| {
-            fragment.doc.as_str().lines().fold(usize::MAX, |min_indent, line| {
-                if line.chars().all(|c| c.is_whitespace()) {
-                    min_indent
-                } else {
-                    // Compare against either space or tab, ignoring whether they are
-                    // mixed or not.
-                    let whitespace = line.chars().take_while(|c| *c == ' ' || *c == '\t').count();
-                    cmp::min(min_indent, whitespace)
-                        + if fragment.kind == DocFragmentKind::SugaredDoc { 0 } else { add }
-                }
-            })
-        })
-        .min()
-    else {
-        return;
-    };
-
-    for fragment in docs {
-        if fragment.doc == kw::Empty {
-            continue;
-        }
-
-        let min_indent = if fragment.kind != DocFragmentKind::SugaredDoc && min_indent > 0 {
-            min_indent - add
-        } else {
-            min_indent
-        };
-
-        fragment.indent = min_indent;
-    }
-}
-
 /// A link that has not yet been rendered.
 ///
 /// This link will be turned into a rendered link by [`Item::links`].
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub(crate) struct ItemLink {
     /// The original link written in the markdown
-    pub(crate) link: String,
+    pub(crate) link: Box<str>,
     /// The link text displayed in the HTML.
     ///
     /// This may not be the same as `link` if there was a disambiguator
     /// in an intra-doc link (e.g. \[`fn@f`\])
-    pub(crate) link_text: String,
+    pub(crate) link_text: Box<str>,
     /// The `DefId` of the Item whose **HTML Page** contains the item being
     /// linked to. This will be different to `item_id` on item's that don't
     /// have their own page, such as struct fields and enum variants.
@@ -1188,11 +1035,13 @@ pub struct RenderedLink {
     /// The text the link was original written as.
     ///
     /// This could potentially include disambiguators and backticks.
-    pub(crate) original_text: String,
+    pub(crate) original_text: Box<str>,
     /// The text to display in the HTML
-    pub(crate) new_text: String,
+    pub(crate) new_text: Box<str>,
     /// The URL to put in the `href`
     pub(crate) href: String,
+    /// The tooltip.
+    pub(crate) tooltip: String,
 }
 
 /// The attributes on an [`Item`], including attributes like `#[derive(...)]` and `#[inline]`,
@@ -1242,26 +1091,7 @@ impl Attributes {
         attrs: impl Iterator<Item = (&'a ast::Attribute, Option<DefId>)>,
         doc_only: bool,
     ) -> Attributes {
-        let mut doc_strings = Vec::new();
-        let mut other_attrs = ast::AttrVec::new();
-        for (attr, parent_module) in attrs {
-            if let Some((doc_str, comment_kind)) = attr.doc_str_and_comment_kind() {
-                trace!("got doc_str={doc_str:?}");
-                let doc = beautify_doc_string(doc_str, comment_kind);
-                let kind = if attr.is_doc_comment() {
-                    DocFragmentKind::SugaredDoc
-                } else {
-                    DocFragmentKind::RawDoc
-                };
-                let fragment = DocFragment { span: attr.span, doc, kind, parent_module, indent: 0 };
-                doc_strings.push(fragment);
-            } else if !doc_only {
-                other_attrs.push(attr.clone());
-            }
-        }
-
-        unindent_doc_fragments(&mut doc_strings);
-
+        let (doc_strings, other_attrs) = attrs_to_doc_fragments(attrs, doc_only);
         Attributes { doc_strings, other_attrs }
     }
 
@@ -1280,20 +1110,6 @@ impl Attributes {
         if out.is_empty() { None } else { Some(out) }
     }
 
-    /// Return the doc-comments on this item, grouped by the module they came from.
-    /// The module can be different if this is a re-export with added documentation.
-    ///
-    /// The last newline is not trimmed so the produced strings are reusable between
-    /// early and late doc link resolution regardless of their position.
-    pub(crate) fn prepare_to_doc_link_resolution(&self) -> FxHashMap<Option<DefId>, String> {
-        let mut res = FxHashMap::default();
-        for fragment in &self.doc_strings {
-            let out_str = res.entry(fragment.parent_module).or_default();
-            add_doc_fragment(out_str, fragment);
-        }
-        res
-    }
-
     /// Finds all `doc` attributes as NameValues and returns their corresponding values, joined
     /// with newlines.
     pub(crate) fn collapsed_doc_value(&self) -> Option<String> {
@@ -1358,10 +1174,10 @@ impl GenericBound {
 
     pub(crate) fn is_sized_bound(&self, cx: &DocContext<'_>) -> bool {
         use rustc_hir::TraitBoundModifier as TBM;
-        if let GenericBound::TraitBound(PolyTrait { ref trait_, .. }, TBM::None) = *self {
-            if Some(trait_.def_id()) == cx.tcx.lang_items().sized_trait() {
-                return true;
-            }
+        if let GenericBound::TraitBound(PolyTrait { ref trait_, .. }, TBM::None) = *self &&
+            Some(trait_.def_id()) == cx.tcx.lang_items().sized_trait()
+        {
+            return true;
         }
         false
     }
@@ -2416,10 +2232,7 @@ impl ConstantKind {
 
     pub(crate) fn is_literal(&self, tcx: TyCtxt<'_>) -> bool {
         match *self {
-            ConstantKind::TyConst { .. } => false,
-            ConstantKind::Extern { def_id } => def_id.as_local().map_or(false, |def_id| {
-                is_literal_expr(tcx, tcx.hir().local_def_id_to_hir_id(def_id))
-            }),
+            ConstantKind::TyConst { .. } | ConstantKind::Extern { .. } => false,
             ConstantKind::Local { body, .. } | ConstantKind::Anonymous { body } => {
                 is_literal_expr(tcx, body.hir_id)
             }
@@ -2498,14 +2311,7 @@ impl Import {
     }
 
     pub(crate) fn imported_item_is_doc_hidden(&self, tcx: TyCtxt<'_>) -> bool {
-        match self.source.did {
-            Some(did) => tcx
-                .get_attrs(did, sym::doc)
-                .filter_map(ast::Attribute::meta_item_list)
-                .flatten()
-                .has_word(sym::hidden),
-            None => false,
-        }
+        self.source.did.map_or(false, |did| tcx.is_doc_hidden(did))
     }
 }
 
diff --git a/src/librustdoc/clean/types/tests.rs b/src/librustdoc/clean/types/tests.rs
index 71eddf434..20627c2cf 100644
--- a/src/librustdoc/clean/types/tests.rs
+++ b/src/librustdoc/clean/types/tests.rs
@@ -2,6 +2,7 @@ use super::*;
 
 use crate::clean::collapse_doc_fragments;
 
+use rustc_resolve::rustdoc::{unindent_doc_fragments, DocFragment, DocFragmentKind};
 use rustc_span::create_default_session_globals_then;
 use rustc_span::source_map::DUMMY_SP;
 use rustc_span::symbol::Symbol;
diff --git a/src/librustdoc/clean/utils.rs b/src/librustdoc/clean/utils.rs
index a12f764fa..c9c1c2c45 100644
--- a/src/librustdoc/clean/utils.rs
+++ b/src/librustdoc/clean/utils.rs
@@ -29,11 +29,6 @@ mod tests;
 pub(crate) fn krate(cx: &mut DocContext<'_>) -> Crate {
     let module = crate::visit_ast::RustdocVisitor::new(cx).visit();
 
-    for &cnum in cx.tcx.crates(()) {
-        // Analyze doc-reachability for extern items
-        crate::visit_lib::lib_embargo_visit_item(cx, cnum.as_def_id());
-    }
-
     // Clean the crate, translating the entire librustc_ast AST to one that is
     // understood by rustdoc.
     let mut module = clean_doc_module(&module, cx);
@@ -134,7 +129,7 @@ fn external_generic_args<'tcx>(
         });
         GenericArgs::Parenthesized { inputs, output }
     } else {
-        GenericArgs::AngleBracketed { args: args.into(), bindings: bindings.into() }
+        GenericArgs::AngleBracketed { args: args.into(), bindings }
     }
 }
 
@@ -271,7 +266,7 @@ pub(crate) fn print_evaluated_const(
     underscores_and_type: bool,
 ) -> Option<String> {
     tcx.const_eval_poly(def_id).ok().and_then(|val| {
-        let ty = tcx.type_of(def_id);
+        let ty = tcx.type_of(def_id).subst_identity();
         match (val, ty.kind()) {
             (_, &ty::Ref(..)) => None,
             (ConstValue::Scalar(_), &ty::Adt(_, _)) => None,
@@ -350,10 +345,10 @@ pub(crate) fn is_literal_expr(tcx: TyCtxt<'_>, hir_id: hir::HirId) -> bool {
             return true;
         }
 
-        if let hir::ExprKind::Unary(hir::UnOp::Neg, expr) = &expr.kind {
-            if let hir::ExprKind::Lit(_) = &expr.kind {
-                return true;
-            }
+        if let hir::ExprKind::Unary(hir::UnOp::Neg, expr) = &expr.kind &&
+            let hir::ExprKind::Lit(_) = &expr.kind
+        {
+            return true;
         }
     }
 
@@ -475,6 +470,12 @@ pub(crate) fn get_auto_trait_and_blanket_impls(
     cx: &mut DocContext<'_>,
     item_def_id: DefId,
 ) -> impl Iterator<Item = Item> {
+    // FIXME: To be removed once `parallel_compiler` bugs are fixed!
+    // More information in <https://github.com/rust-lang/rust/pull/106930>.
+    if cfg!(parallel_compiler) {
+        return vec![].into_iter().chain(vec![].into_iter());
+    }
+
     let auto_impls = cx
         .sess()
         .prof
diff --git a/src/librustdoc/config.rs b/src/librustdoc/config.rs
index 56b40d8c6..2c514a0c8 100644
--- a/src/librustdoc/config.rs
+++ b/src/librustdoc/config.rs
@@ -509,7 +509,7 @@ impl Options {
                 // these values up both in `dataset` and in the storage API, so it needs to be able
                 // to convert the names back and forth.  Despite doing this kebab-case to
                 // StudlyCaps transformation automatically, the JS DOM API does not provide a
-                // mechanism for doing the just transformation on a string.  So we want to avoid
+                // mechanism for doing just the transformation on a string.  So we want to avoid
                 // the StudlyCaps representation in the `dataset` property.
                 //
                 // We solve this by replacing all the `-`s with `_`s.  We do that here, when we
diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index 2153e7d8c..fbfc58a43 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -1,23 +1,22 @@
-use rustc_ast::NodeId;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::{self, Lrc};
 use rustc_data_structures::unord::UnordSet;
 use rustc_errors::emitter::{Emitter, EmitterWriter};
 use rustc_errors::json::JsonEmitter;
+use rustc_errors::TerminalUrl;
 use rustc_feature::UnstableFeatures;
-use rustc_hir::def::{Namespace, Res};
-use rustc_hir::def_id::{DefId, DefIdMap, LocalDefId};
+use rustc_hir::def::Res;
+use rustc_hir::def_id::{DefId, DefIdMap, DefIdSet, LocalDefId};
 use rustc_hir::intravisit::{self, Visitor};
-use rustc_hir::{HirId, Path, TraitCandidate};
+use rustc_hir::{HirId, Path};
 use rustc_interface::interface;
 use rustc_middle::hir::nested_filter;
 use rustc_middle::ty::{ParamEnv, Ty, TyCtxt};
-use rustc_resolve as resolve;
-use rustc_session::config::{self, CrateType, ErrorOutputType};
+use rustc_session::config::{self, CrateType, ErrorOutputType, ResolveDocLinks};
 use rustc_session::lint;
 use rustc_session::Session;
 use rustc_span::symbol::sym;
-use rustc_span::{source_map, Span, Symbol};
+use rustc_span::{source_map, Span};
 
 use std::cell::RefCell;
 use std::mem;
@@ -28,30 +27,12 @@ use crate::clean::inline::build_external_trait;
 use crate::clean::{self, ItemId};
 use crate::config::{Options as RustdocOptions, OutputFormat, RenderOptions};
 use crate::formats::cache::Cache;
-use crate::passes::collect_intra_doc_links::PreprocessedMarkdownLink;
 use crate::passes::{self, Condition::*};
 
 pub(crate) use rustc_session::config::{Input, Options, UnstableOptions};
 
-pub(crate) struct ResolverCaches {
-    pub(crate) markdown_links: Option<FxHashMap<String, Vec<PreprocessedMarkdownLink>>>,
-    pub(crate) doc_link_resolutions: FxHashMap<(Symbol, Namespace, DefId), Option<Res<NodeId>>>,
-    /// Traits in scope for a given module.
-    /// See `collect_intra_doc_links::traits_implemented_by` for more details.
-    pub(crate) traits_in_scope: DefIdMap<Vec<TraitCandidate>>,
-    pub(crate) all_trait_impls: Option<Vec<DefId>>,
-    pub(crate) all_macro_rules: FxHashMap<Symbol, Res<NodeId>>,
-}
-
 pub(crate) struct DocContext<'tcx> {
     pub(crate) tcx: TyCtxt<'tcx>,
-    /// Name resolver. Used for intra-doc links.
-    ///
-    /// The `Rc<RefCell<...>>` wrapping is needed because that is what's returned by
-    /// [`rustc_interface::Queries::expansion()`].
-    // FIXME: see if we can get rid of this RefCell somehow
-    pub(crate) resolver: Rc<RefCell<interface::BoxedResolver>>,
-    pub(crate) resolver_caches: ResolverCaches,
     /// Used for normalization.
     ///
     /// Most of this logic is copied from rustc_lint::late.
@@ -60,11 +41,11 @@ pub(crate) struct DocContext<'tcx> {
     pub(crate) external_traits: Rc<RefCell<FxHashMap<DefId, clean::Trait>>>,
     /// Used while populating `external_traits` to ensure we don't process the same trait twice at
     /// the same time.
-    pub(crate) active_extern_traits: FxHashSet<DefId>,
+    pub(crate) active_extern_traits: DefIdSet,
     // The current set of parameter substitutions,
     // for expanding type aliases at the HIR level:
     /// Table `DefId` of type, lifetime, or const parameter -> substituted type, lifetime, or const
-    pub(crate) substs: FxHashMap<DefId, clean::SubstParam>,
+    pub(crate) substs: DefIdMap<clean::SubstParam>,
     /// Table synthetic type parameter for `impl Trait` in argument position -> bounds
     pub(crate) impl_trait_bounds: FxHashMap<ImplTraitParam, Vec<clean::GenericBound>>,
     /// Auto-trait or blanket impls processed so far, as `(self_ty, trait_def_id)`.
@@ -99,20 +80,9 @@ impl<'tcx> DocContext<'tcx> {
         ret
     }
 
-    pub(crate) fn enter_resolver<F, R>(&self, f: F) -> R
-    where
-        F: FnOnce(&mut resolve::Resolver<'_>) -> R,
-    {
-        self.resolver.borrow_mut().access(f)
-    }
-
     /// Call the closure with the given parameters set as
     /// the substitutions for a type alias' RHS.
-    pub(crate) fn enter_alias<F, R>(
-        &mut self,
-        substs: FxHashMap<DefId, clean::SubstParam>,
-        f: F,
-    ) -> R
+    pub(crate) fn enter_alias<F, R>(&mut self, substs: DefIdMap<clean::SubstParam>, f: F) -> R
     where
         F: FnOnce(&mut Self) -> R,
     {
@@ -133,12 +103,6 @@ impl<'tcx> DocContext<'tcx> {
             _ => None,
         }
     }
-
-    pub(crate) fn with_all_trait_impls(&mut self, f: impl FnOnce(&mut Self, &[DefId])) {
-        let all_trait_impls = self.resolver_caches.all_trait_impls.take();
-        f(self, all_trait_impls.as_ref().expect("`all_trait_impls` are already borrowed"));
-        self.resolver_caches.all_trait_impls = all_trait_impls;
-    }
 }
 
 /// Creates a new diagnostic `Handler` that can be used to emit warnings and errors.
@@ -151,8 +115,10 @@ pub(crate) fn new_handler(
     diagnostic_width: Option<usize>,
     unstable_opts: &UnstableOptions,
 ) -> rustc_errors::Handler {
-    let fallback_bundle =
-        rustc_errors::fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false);
+    let fallback_bundle = rustc_errors::fallback_fluent_bundle(
+        rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
+        false,
+    );
     let emitter: Box<dyn Emitter + sync::Send> = match error_format {
         ErrorOutputType::HumanReadable(kind) => {
             let (short, color_config) = kind.unzip();
@@ -167,6 +133,7 @@ pub(crate) fn new_handler(
                     diagnostic_width,
                     false,
                     unstable_opts.track_diagnostics,
+                    TerminalUrl::No,
                 )
                 .ui_testing(unstable_opts.ui_testing),
             )
@@ -186,6 +153,7 @@ pub(crate) fn new_handler(
                     diagnostic_width,
                     false,
                     unstable_opts.track_diagnostics,
+                    TerminalUrl::No,
                 )
                 .ui_testing(unstable_opts.ui_testing),
             )
@@ -221,6 +189,7 @@ pub(crate) fn create_config(
         scrape_examples_options,
         ..
     }: RustdocOptions,
+    RenderOptions { document_private, .. }: &RenderOptions,
 ) -> rustc_interface::Config {
     // Add the doc cfg into the doc build.
     cfgs.push("doc".to_string());
@@ -248,6 +217,13 @@ pub(crate) fn create_config(
 
     let crate_types =
         if proc_macro_crate { vec![CrateType::ProcMacro] } else { vec![CrateType::Rlib] };
+    let resolve_doc_links = if *document_private {
+        ResolveDocLinks::All
+    } else {
+        // Should be `ResolveDocLinks::Exported` in theory, but for some reason rustdoc
+        // still tries to request resolutions for links on private items.
+        ResolveDocLinks::All
+    };
     let test = scrape_examples_options.map(|opts| opts.scrape_tests).unwrap_or(false);
     // plays with error output here!
     let sessopts = config::Options {
@@ -261,6 +237,7 @@ pub(crate) fn create_config(
         target_triple: target,
         unstable_features: UnstableFeatures::from_environment(crate_name.as_deref()),
         actually_rustdoc: true,
+        resolve_doc_links,
         unstable_opts,
         error_format,
         diagnostic_width,
@@ -279,6 +256,7 @@ pub(crate) fn create_config(
         output_file: None,
         output_dir: None,
         file_loader: None,
+        locale_resources: rustc_driver::DEFAULT_LOCALE_RESOURCES,
         lint_caps,
         parse_sess_created: None,
         register_lints: Some(Box::new(crate::lint::register_lints)),
@@ -316,8 +294,6 @@ pub(crate) fn create_config(
 
 pub(crate) fn run_global_ctxt(
     tcx: TyCtxt<'_>,
-    resolver: Rc<RefCell<interface::BoxedResolver>>,
-    resolver_caches: ResolverCaches,
     show_coverage: bool,
     render_options: RenderOptions,
     output_format: OutputFormat,
@@ -351,8 +327,6 @@ pub(crate) fn run_global_ctxt(
 
     let mut ctxt = DocContext {
         tcx,
-        resolver,
-        resolver_caches,
         param_env: ParamEnv::empty(),
         external_traits: Default::default(),
         active_extern_traits: Default::default(),
@@ -367,6 +341,10 @@ pub(crate) fn run_global_ctxt(
         show_coverage,
     };
 
+    for cnum in tcx.crates(()) {
+        crate::visit_lib::lib_embargo_visit_item(&mut ctxt, cnum.as_def_id());
+    }
+
     // Small hack to force the Sized trait to be present.
     //
     // Note that in case of `#![no_core]`, the trait is not available.
diff --git a/src/librustdoc/doctest.rs b/src/librustdoc/doctest.rs
index c1a652c75..9cf84acc7 100644
--- a/src/librustdoc/doctest.rs
+++ b/src/librustdoc/doctest.rs
@@ -1,11 +1,9 @@
 use rustc_ast as ast;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::Lrc;
-use rustc_errors::{ColorConfig, ErrorGuaranteed, FatalError};
-use rustc_hir as hir;
-use rustc_hir::def_id::LOCAL_CRATE;
-use rustc_hir::intravisit;
-use rustc_hir::{HirId, CRATE_HIR_ID};
+use rustc_errors::{ColorConfig, ErrorGuaranteed, FatalError, TerminalUrl};
+use rustc_hir::def_id::{LocalDefId, CRATE_DEF_ID, LOCAL_CRATE};
+use rustc_hir::{self as hir, intravisit, CRATE_HIR_ID};
 use rustc_interface::interface;
 use rustc_middle::hir::map::Map;
 use rustc_middle::hir::nested_filter;
@@ -98,6 +96,7 @@ pub(crate) fn run(options: RustdocOptions) -> Result<(), ErrorGuaranteed> {
         output_file: None,
         output_dir: None,
         file_loader: None,
+        locale_resources: rustc_driver::DEFAULT_LOCALE_RESOURCES,
         lint_caps,
         parse_sess_created: None,
         register_lints: Some(Box::new(crate::lint::register_lints)),
@@ -140,7 +139,7 @@ pub(crate) fn run(options: RustdocOptions) -> Result<(), ErrorGuaranteed> {
                     };
                     hir_collector.visit_testable(
                         "".to_string(),
-                        CRATE_HIR_ID,
+                        CRATE_DEF_ID,
                         tcx.hir().span(CRATE_HIR_ID),
                         |this| tcx.hir().walk_toplevel_module(this),
                     );
@@ -231,11 +230,11 @@ fn scrape_test_config(attrs: &[ast::Attribute]) -> GlobalTestOptions {
         if attr.has_name(sym::no_crate_inject) {
             opts.no_crate_inject = true;
         }
-        if attr.has_name(sym::attr) {
-            if let Some(l) = attr.meta_item_list() {
-                for item in l {
-                    opts.attrs.push(pprust::meta_list_item_to_string(item));
-                }
+        if attr.has_name(sym::attr)
+            && let Some(l) = attr.meta_item_list()
+        {
+            for item in l {
+                opts.attrs.push(pprust::meta_list_item_to_string(item));
             }
         }
     }
@@ -547,8 +546,10 @@ pub(crate) fn make_test(
             // Any errors in parsing should also appear when the doctest is compiled for real, so just
             // send all the errors that librustc_ast emits directly into a `Sink` instead of stderr.
             let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
-            let fallback_bundle =
-                rustc_errors::fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false);
+            let fallback_bundle = rustc_errors::fallback_fluent_bundle(
+                rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
+                false,
+            );
             supports_color = EmitterWriter::stderr(
                 ColorConfig::Auto,
                 None,
@@ -559,6 +560,7 @@ pub(crate) fn make_test(
                 Some(80),
                 false,
                 false,
+                TerminalUrl::No,
             )
             .supports_color();
 
@@ -573,6 +575,7 @@ pub(crate) fn make_test(
                 None,
                 false,
                 false,
+                TerminalUrl::No,
             );
 
             // FIXME(misdreavus): pass `-Z treat-err-as-bug` to the doctest parser
@@ -594,31 +597,28 @@ pub(crate) fn make_test(
             loop {
                 match parser.parse_item(ForceCollect::No) {
                     Ok(Some(item)) => {
-                        if !found_main {
-                            if let ast::ItemKind::Fn(..) = item.kind {
-                                if item.ident.name == sym::main {
-                                    found_main = true;
-                                }
-                            }
+                        if !found_main &&
+                            let ast::ItemKind::Fn(..) = item.kind &&
+                            item.ident.name == sym::main
+                        {
+                            found_main = true;
                         }
 
-                        if !found_extern_crate {
-                            if let ast::ItemKind::ExternCrate(original) = item.kind {
-                                // This code will never be reached if `crate_name` is none because
-                                // `found_extern_crate` is initialized to `true` if it is none.
-                                let crate_name = crate_name.unwrap();
+                        if !found_extern_crate &&
+                            let ast::ItemKind::ExternCrate(original) = item.kind
+                        {
+                            // This code will never be reached if `crate_name` is none because
+                            // `found_extern_crate` is initialized to `true` if it is none.
+                            let crate_name = crate_name.unwrap();
 
-                                match original {
-                                    Some(name) => found_extern_crate = name.as_str() == crate_name,
-                                    None => found_extern_crate = item.ident.as_str() == crate_name,
-                                }
+                            match original {
+                                Some(name) => found_extern_crate = name.as_str() == crate_name,
+                                None => found_extern_crate = item.ident.as_str() == crate_name,
                             }
                         }
 
-                        if !found_macro {
-                            if let ast::ItemKind::MacCall(..) = item.kind {
-                                found_macro = true;
-                            }
+                        if !found_macro && let ast::ItemKind::MacCall(..) = item.kind {
+                            found_macro = true;
                         }
 
                         if found_main && found_extern_crate {
@@ -744,8 +744,10 @@ fn check_if_attr_is_complete(source: &str, edition: Edition) -> bool {
             // Any errors in parsing should also appear when the doctest is compiled for real, so just
             // send all the errors that librustc_ast emits directly into a `Sink` instead of stderr.
             let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
-            let fallback_bundle =
-                rustc_errors::fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false);
+            let fallback_bundle = rustc_errors::fallback_fluent_bundle(
+                rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
+                false,
+            );
 
             let emitter = EmitterWriter::new(
                 Box::new(io::sink()),
@@ -758,6 +760,7 @@ fn check_if_attr_is_complete(source: &str, edition: Edition) -> bool {
                 None,
                 false,
                 false,
+                TerminalUrl::No,
             );
 
             let handler = Handler::with_emitter(false, None, Box::new(emitter));
@@ -766,8 +769,8 @@ fn check_if_attr_is_complete(source: &str, edition: Edition) -> bool {
                 match maybe_new_parser_from_source_str(&sess, filename, source.to_owned()) {
                     Ok(p) => p,
                     Err(_) => {
-                        debug!("Cannot build a parser to check mod attr so skipping...");
-                        return true;
+                        // If there is an unclosed delimiter, an error will be returned by the tokentrees.
+                        return false;
                     }
                 };
             // If a parsing error happened, it's very likely that the attribute is incomplete.
@@ -775,15 +778,7 @@ fn check_if_attr_is_complete(source: &str, edition: Edition) -> bool {
                 e.cancel();
                 return false;
             }
-            // We now check if there is an unclosed delimiter for the attribute. To do so, we look at
-            // the `unclosed_delims` and see if the opening square bracket was closed.
-            parser
-                .unclosed_delims()
-                .get(0)
-                .map(|unclosed| {
-                    unclosed.unclosed_span.map(|s| s.lo()).unwrap_or(BytePos(0)) != BytePos(2)
-                })
-                .unwrap_or(true)
+            true
         })
     })
     .unwrap_or(false)
@@ -971,14 +966,12 @@ impl Collector {
     fn get_filename(&self) -> FileName {
         if let Some(ref source_map) = self.source_map {
             let filename = source_map.span_to_filename(self.position);
-            if let FileName::Real(ref filename) = filename {
-                if let Ok(cur_dir) = env::current_dir() {
-                    if let Some(local_path) = filename.local_path() {
-                        if let Ok(path) = local_path.strip_prefix(&cur_dir) {
-                            return path.to_owned().into();
-                        }
-                    }
-                }
+            if let FileName::Real(ref filename) = filename &&
+                let Ok(cur_dir) = env::current_dir() &&
+                let Some(local_path) = filename.local_path() &&
+                let Ok(path) = local_path.strip_prefix(&cur_dir)
+            {
+                return path.to_owned().into();
             }
             filename
         } else if let Some(ref filename) = self.filename {
@@ -1214,11 +1207,11 @@ impl<'a, 'hir, 'tcx> HirCollector<'a, 'hir, 'tcx> {
     fn visit_testable<F: FnOnce(&mut Self)>(
         &mut self,
         name: String,
-        hir_id: HirId,
+        def_id: LocalDefId,
         sp: Span,
         nested: F,
     ) {
-        let ast_attrs = self.tcx.hir().attrs(hir_id);
+        let ast_attrs = self.tcx.hir().attrs(self.tcx.hir().local_def_id_to_hir_id(def_id));
         if let Some(ref cfg) = ast_attrs.cfg(self.tcx, &FxHashSet::default()) {
             if !cfg.matches(&self.sess.parse_sess, Some(self.tcx.features())) {
                 return;
@@ -1247,7 +1240,7 @@ impl<'a, 'hir, 'tcx> HirCollector<'a, 'hir, 'tcx> {
                 self.collector.enable_per_target_ignores,
                 Some(&crate::html::markdown::ExtraInfo::new(
                     self.tcx,
-                    hir_id,
+                    def_id.to_def_id(),
                     span_of_attrs(&attrs).unwrap_or(sp),
                 )),
             );
@@ -1276,37 +1269,37 @@ impl<'a, 'hir, 'tcx> intravisit::Visitor<'hir> for HirCollector<'a, 'hir, 'tcx>
             _ => item.ident.to_string(),
         };
 
-        self.visit_testable(name, item.hir_id(), item.span, |this| {
+        self.visit_testable(name, item.owner_id.def_id, item.span, |this| {
             intravisit::walk_item(this, item);
         });
     }
 
     fn visit_trait_item(&mut self, item: &'hir hir::TraitItem<'_>) {
-        self.visit_testable(item.ident.to_string(), item.hir_id(), item.span, |this| {
+        self.visit_testable(item.ident.to_string(), item.owner_id.def_id, item.span, |this| {
             intravisit::walk_trait_item(this, item);
         });
     }
 
     fn visit_impl_item(&mut self, item: &'hir hir::ImplItem<'_>) {
-        self.visit_testable(item.ident.to_string(), item.hir_id(), item.span, |this| {
+        self.visit_testable(item.ident.to_string(), item.owner_id.def_id, item.span, |this| {
             intravisit::walk_impl_item(this, item);
         });
     }
 
     fn visit_foreign_item(&mut self, item: &'hir hir::ForeignItem<'_>) {
-        self.visit_testable(item.ident.to_string(), item.hir_id(), item.span, |this| {
+        self.visit_testable(item.ident.to_string(), item.owner_id.def_id, item.span, |this| {
             intravisit::walk_foreign_item(this, item);
         });
     }
 
     fn visit_variant(&mut self, v: &'hir hir::Variant<'_>) {
-        self.visit_testable(v.ident.to_string(), v.hir_id, v.span, |this| {
+        self.visit_testable(v.ident.to_string(), v.def_id, v.span, |this| {
             intravisit::walk_variant(this, v);
         });
     }
 
     fn visit_field_def(&mut self, f: &'hir hir::FieldDef<'_>) {
-        self.visit_testable(f.ident.to_string(), f.hir_id, f.span, |this| {
+        self.visit_testable(f.ident.to_string(), f.def_id, f.span, |this| {
             intravisit::walk_field_def(this, f);
         });
     }
diff --git a/src/librustdoc/formats/cache.rs b/src/librustdoc/formats/cache.rs
index 1c78c5b8d..8dbfaf4bb 100644
--- a/src/librustdoc/formats/cache.rs
+++ b/src/librustdoc/formats/cache.rs
@@ -1,7 +1,7 @@
 use std::mem;
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
-use rustc_hir::def_id::{CrateNum, DefId};
+use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, DefIdSet};
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::Symbol;
 
@@ -33,7 +33,7 @@ pub(crate) struct Cache {
     ///
     /// The values of the map are a list of implementations and documentation
     /// found on that implementation.
-    pub(crate) impls: FxHashMap<DefId, Vec<Impl>>,
+    pub(crate) impls: DefIdMap<Vec<Impl>>,
 
     /// Maintains a mapping of local crate `DefId`s to the fully qualified name
     /// and "short type description" of that node. This is used when generating
@@ -56,7 +56,7 @@ pub(crate) struct Cache {
     /// to the path used if the corresponding type is inlined. By
     /// doing this, we can detect duplicate impls on a trait page, and only display
     /// the impl for the inlined type.
-    pub(crate) exact_paths: FxHashMap<DefId, Vec<Symbol>>,
+    pub(crate) exact_paths: DefIdMap<Vec<Symbol>>,
 
     /// This map contains information about all known traits of this crate.
     /// Implementations of a crate should inherit the documentation of the
@@ -127,7 +127,7 @@ pub(crate) struct Cache {
 struct CacheBuilder<'a, 'tcx> {
     cache: &'a mut Cache,
     /// This field is used to prevent duplicated impl blocks.
-    impl_ids: FxHashMap<DefId, FxHashSet<DefId>>,
+    impl_ids: DefIdMap<DefIdSet>,
     tcx: TyCtxt<'tcx>,
 }
 
@@ -173,7 +173,7 @@ impl Cache {
 
         let (krate, mut impl_ids) = {
             let mut cache_builder =
-                CacheBuilder { tcx, cache: &mut cx.cache, impl_ids: FxHashMap::default() };
+                CacheBuilder { tcx, cache: &mut cx.cache, impl_ids: Default::default() };
             krate = cache_builder.fold_crate(krate);
             (krate, cache_builder.impl_ids)
         };
@@ -229,16 +229,15 @@ impl<'a, 'tcx> DocFolder for CacheBuilder<'a, 'tcx> {
         }
 
         // Collect all the implementors of traits.
-        if let clean::ImplItem(ref i) = *item.kind {
-            if let Some(trait_) = &i.trait_ {
-                if !i.kind.is_blanket() {
-                    self.cache
-                        .implementors
-                        .entry(trait_.def_id())
-                        .or_default()
-                        .push(Impl { impl_item: item.clone() });
-                }
-            }
+        if let clean::ImplItem(ref i) = *item.kind &&
+            let Some(trait_) = &i.trait_ &&
+            !i.kind.is_blanket()
+        {
+            self.cache
+                .implementors
+                .entry(trait_.def_id())
+                .or_default()
+                .push(Impl { impl_item: item.clone() });
         }
 
         // Index this method for searching later on.
@@ -288,6 +287,16 @@ impl<'a, 'tcx> DocFolder for CacheBuilder<'a, 'tcx> {
                     } else {
                         let last = self.cache.parent_stack.last().expect("parent_stack is empty 2");
                         let did = match &*last {
+                            ParentStackItem::Impl {
+                                // impl Trait for &T { fn method(self); }
+                                //
+                                // When generating a function index with the above shape, we want it
+                                // associated with `T`, not with the primitive reference type. It should
+                                // show up as `T::method`, rather than `reference::method`, in the search
+                                // results page.
+                                for_: clean::Type::BorrowedRef { type_, .. },
+                                ..
+                            } => type_.def_id(&self.cache),
                             ParentStackItem::Impl { for_, .. } => for_.def_id(&self.cache),
                             ParentStackItem::Type(item_id) => item_id.as_def_id(),
                         };
@@ -454,7 +463,7 @@ impl<'a, 'tcx> DocFolder for CacheBuilder<'a, 'tcx> {
                 | clean::BorrowedRef { type_: box clean::Type::Path { ref path }, .. } => {
                     dids.insert(path.def_id());
                     if let Some(generics) = path.generics() &&
-                        let ty::Adt(adt, _) = self.tcx.type_of(path.def_id()).kind() &&
+                        let ty::Adt(adt, _) = self.tcx.type_of(path.def_id()).subst_identity().kind() &&
                         adt.is_fundamental() {
                         for ty in generics {
                             if let Some(did) = ty.def_id(self.cache) {
diff --git a/src/librustdoc/formats/item_type.rs b/src/librustdoc/formats/item_type.rs
index 2f1f4cbf3..452e14918 100644
--- a/src/librustdoc/formats/item_type.rs
+++ b/src/librustdoc/formats/item_type.rs
@@ -21,6 +21,7 @@ use crate::clean;
 /// a heading, edit the listing in `html/render.rs`, function `sidebar_module`. This uses an
 /// ordering based on a helper function inside `item_module`, in the same file.
 #[derive(Copy, PartialEq, Eq, Hash, Clone, Debug, PartialOrd, Ord)]
+#[repr(u8)]
 pub(crate) enum ItemType {
     Module = 0,
     ExternCrate = 1,
@@ -139,7 +140,7 @@ impl From<DefKind> for ItemType {
             | DefKind::Field
             | DefKind::LifetimeParam
             | DefKind::GlobalAsm
-            | DefKind::Impl
+            | DefKind::Impl { .. }
             | DefKind::Closure
             | DefKind::Generator => Self::ForeignType,
         }
diff --git a/src/librustdoc/html/format.rs b/src/librustdoc/html/format.rs
index d3dc4065d..0e4c5ed68 100644
--- a/src/librustdoc/html/format.rs
+++ b/src/librustdoc/html/format.rs
@@ -34,6 +34,7 @@ use crate::clean::{
 use crate::formats::item_type::ItemType;
 use crate::html::escape::Escape;
 use crate::html::render::Context;
+use crate::passes::collect_intra_doc_links::UrlFragment;
 
 use super::url_parts_builder::estimate_item_path_byte_length;
 use super::url_parts_builder::UrlPartsBuilder;
@@ -208,7 +209,7 @@ impl clean::GenericParamDef {
                     if f.alternate() {
                         write!(f, ": {:#}", print_generic_bounds(bounds, cx))?;
                     } else {
-                        write!(f, ":&nbsp;{}", print_generic_bounds(bounds, cx))?;
+                        write!(f, ": {}", print_generic_bounds(bounds, cx))?;
                     }
                 }
 
@@ -216,7 +217,7 @@ impl clean::GenericParamDef {
                     if f.alternate() {
                         write!(f, " = {:#}", ty.print(cx))?;
                     } else {
-                        write!(f, "&nbsp;=&nbsp;{}", ty.print(cx))?;
+                        write!(f, " = {}", ty.print(cx))?;
                     }
                 }
 
@@ -226,14 +227,14 @@ impl clean::GenericParamDef {
                 if f.alternate() {
                     write!(f, "const {}: {:#}", self.name, ty.print(cx))?;
                 } else {
-                    write!(f, "const {}:&nbsp;{}", self.name, ty.print(cx))?;
+                    write!(f, "const {}: {}", self.name, ty.print(cx))?;
                 }
 
                 if let Some(default) = default {
                     if f.alternate() {
                         write!(f, " = {:#}", default)?;
                     } else {
-                        write!(f, "&nbsp;=&nbsp;{}", default)?;
+                        write!(f, " = {}", default)?;
                     }
                 }
 
@@ -289,7 +290,7 @@ pub(crate) fn print_where_clause<'a, 'tcx: 'a>(
                 if f.alternate() {
                     f.write_str(" ")?;
                 } else {
-                    f.write_str("<br>")?;
+                    f.write_str("\n")?;
                 }
 
                 match pred {
@@ -352,23 +353,31 @@ pub(crate) fn print_where_clause<'a, 'tcx: 'a>(
             }
         } else {
             let mut br_with_padding = String::with_capacity(6 * indent + 28);
-            br_with_padding.push_str("<br>");
-            for _ in 0..indent + 4 {
-                br_with_padding.push_str("&nbsp;");
+            br_with_padding.push_str("\n");
+
+            let padding_amout =
+                if ending == Ending::Newline { indent + 4 } else { indent + "fn where ".len() };
+
+            for _ in 0..padding_amout {
+                br_with_padding.push_str(" ");
             }
-            let where_preds = where_preds.to_string().replace("<br>", &br_with_padding);
+            let where_preds = where_preds.to_string().replace('\n', &br_with_padding);
 
             if ending == Ending::Newline {
-                let mut clause = "&nbsp;".repeat(indent.saturating_sub(1));
+                let mut clause = " ".repeat(indent.saturating_sub(1));
                 write!(clause, "<span class=\"where fmt-newline\">where{where_preds},</span>")?;
                 clause
             } else {
-                // insert a <br> tag after a single space but before multiple spaces at the start
+                // insert a newline after a single space but before multiple spaces at the start
                 if indent == 0 {
-                    format!("<br><span class=\"where\">where{where_preds}</span>")
+                    format!("\n<span class=\"where\">where{where_preds}</span>")
                 } else {
+                    // put the first one on the same line as the 'where' keyword
+                    let where_preds = where_preds.replacen(&br_with_padding, " ", 1);
+
                     let mut clause = br_with_padding;
-                    clause.truncate(clause.len() - 4 * "&nbsp;".len());
+                    clause.truncate(clause.len() - "where ".len());
+
                     write!(clause, "<span class=\"where\">where{where_preds}</span>")?;
                     clause
                 }
@@ -701,11 +710,9 @@ pub(crate) fn href_with_root_path(
             }
         }
     };
-    if !is_remote {
-        if let Some(root_path) = root_path {
-            let root = root_path.trim_end_matches('/');
-            url_parts.push_front(root);
-        }
+    if !is_remote && let Some(root_path) = root_path {
+        let root = root_path.trim_end_matches('/');
+        url_parts.push_front(root);
     }
     debug!(?url_parts);
     match shortty {
@@ -760,6 +767,28 @@ pub(crate) fn href_relative_parts<'fqp>(
     }
 }
 
+pub(crate) fn link_tooltip(did: DefId, fragment: &Option<UrlFragment>, cx: &Context<'_>) -> String {
+    let cache = cx.cache();
+    let Some((fqp, shortty)) = cache.paths.get(&did)
+        .or_else(|| cache.external_paths.get(&did))
+        else { return String::new() };
+    let mut buf = Buffer::new();
+    if let &Some(UrlFragment::Item(id)) = fragment {
+        write!(buf, "{} ", cx.tcx().def_descr(id));
+        for component in fqp {
+            write!(buf, "{component}::");
+        }
+        write!(buf, "{}", cx.tcx().item_name(id));
+    } else if !fqp.is_empty() {
+        let mut fqp_it = fqp.into_iter();
+        write!(buf, "{shortty} {}", fqp_it.next().unwrap());
+        for component in fqp_it {
+            write!(buf, "::{component}");
+        }
+    }
+    buf.into_inner()
+}
+
 /// Used to render a [`clean::Path`].
 fn resolved_path<'cx>(
     w: &mut fmt::Formatter<'_>,
@@ -1064,14 +1093,8 @@ fn fmt_type<'cx>(
                     fmt_type(ty, f, use_absolute, cx)?;
                     write!(f, ")")
                 }
-                clean::Generic(..) => {
-                    primitive_link(
-                        f,
-                        PrimitiveType::Reference,
-                        &format!("{}{}{}", amp, lt, m),
-                        cx,
-                    )?;
-                    fmt_type(ty, f, use_absolute, cx)
+                clean::Generic(name) => {
+                    primitive_link(f, PrimitiveType::Reference, &format!("{amp}{lt}{m}{name}"), cx)
                 }
                 _ => {
                     write!(f, "{}{}{}", amp, lt, m)?;
@@ -1313,7 +1336,8 @@ impl clean::FnDecl {
 
     /// * `header_len`: The length of the function header and name. In other words, the number of
     ///   characters in the function declaration up to but not including the parentheses.
-    ///   <br>Used to determine line-wrapping.
+    ///   This is expected to go into a `<pre>`/`code-header` block, so indentation and newlines
+    ///   are preserved.
     /// * `indent`: The number of spaces to indent each successive line with, if line-wrapping is
     ///   necessary.
     pub(crate) fn full_print<'a, 'tcx: 'a>(
@@ -1361,7 +1385,7 @@ impl clean::FnDecl {
                 }
             } else {
                 if i > 0 {
-                    args.push_str("<br>");
+                    args.push_str("\n");
                 }
                 if input.is_const {
                     args.push_str("const ");
@@ -1387,7 +1411,7 @@ impl clean::FnDecl {
         let mut args = args.into_inner();
 
         if self.c_variadic {
-            args.push_str(",<br> ...");
+            args.push_str(",\n ...");
             args_plain.push_str(", ...");
         }
 
@@ -1397,24 +1421,20 @@ impl clean::FnDecl {
 
         let declaration_len = header_len + args_plain.len() + arrow_plain.len();
         let output = if declaration_len > 80 {
-            let full_pad = format!("<br>{}", "&nbsp;".repeat(indent + 4));
-            let close_pad = format!("<br>{}", "&nbsp;".repeat(indent));
+            let full_pad = format!("\n{}", " ".repeat(indent + 4));
+            let close_pad = format!("\n{}", " ".repeat(indent));
             format!(
                 "({pad}{args}{close}){arrow}",
                 pad = if self.inputs.values.is_empty() { "" } else { &full_pad },
-                args = args.replace("<br>", &full_pad),
+                args = args.replace('\n', &full_pad),
                 close = close_pad,
                 arrow = arrow
             )
         } else {
-            format!("({args}){arrow}", args = args.replace("<br>", " "), arrow = arrow)
+            format!("({args}){arrow}", args = args.replace('\n', " "), arrow = arrow)
         };
 
-        if f.alternate() {
-            write!(f, "{}", output.replace("<br>", "\n"))
-        } else {
-            write!(f, "{}", output)
-        }
+        write!(f, "{}", output)
     }
 }
 
@@ -1617,7 +1637,7 @@ impl clean::TypeBinding {
                         if f.alternate() {
                             write!(f, ": {:#}", print_generic_bounds(bounds, cx))?;
                         } else {
-                            write!(f, ":&nbsp;{}", print_generic_bounds(bounds, cx))?;
+                            write!(f, ": {}", print_generic_bounds(bounds, cx))?;
                         }
                     }
                 }
diff --git a/src/librustdoc/html/highlight.rs b/src/librustdoc/html/highlight.rs
index 8a9e6caf6..2c9fc4e3c 100644
--- a/src/librustdoc/html/highlight.rs
+++ b/src/librustdoc/html/highlight.rs
@@ -58,11 +58,11 @@ pub(crate) fn render_example_with_highlighting(
     write_footer(out, playground_button);
 }
 
-/// Highlights `src` as a macro, returning the HTML output.
-pub(crate) fn render_macro_with_highlighting(src: &str, out: &mut Buffer) {
-    write_header(out, "macro", None, Tooltip::None);
+/// Highlights `src` as an item-decl, returning the HTML output.
+pub(crate) fn render_item_decl_with_highlighting(src: &str, out: &mut Buffer) {
+    write!(out, "<pre class=\"rust item-decl\">");
     write_code(out, src, None, None);
-    write_footer(out, None);
+    write!(out, "</pre>");
 }
 
 /// Highlights `src` as a source code page, returning the HTML output.
@@ -96,13 +96,19 @@ fn write_header(out: &mut Buffer, class: &str, extra_content: Option<Buffer>, to
     );
 
     if tooltip != Tooltip::None {
+        let edition_code;
         write!(
             out,
-            "<div class='tooltip'{}>ⓘ</div>",
-            if let Tooltip::Edition(edition_info) = tooltip {
-                format!(" data-edition=\"{}\"", edition_info)
-            } else {
-                String::new()
+            "<a href=\"#\" class=\"tooltip\" title=\"{}\">ⓘ</a>",
+            match tooltip {
+                Tooltip::Ignore => "This example is not tested",
+                Tooltip::CompileFail => "This example deliberately fails to compile",
+                Tooltip::ShouldPanic => "This example panics",
+                Tooltip::Edition(edition) => {
+                    edition_code = format!("This example runs with edition {edition}");
+                    &edition_code
+                }
+                Tooltip::None => unreachable!(),
             },
         );
     }
@@ -460,10 +466,8 @@ impl<'a> PeekIter<'a> {
     }
     /// Returns the next item after the current one. It doesn't interfere with `peek_next` output.
     fn peek(&mut self) -> Option<&(TokenKind, &'a str)> {
-        if self.stored.is_empty() {
-            if let Some(next) = self.iter.next() {
-                self.stored.push_back(next);
-            }
+        if self.stored.is_empty() && let Some(next) = self.iter.next() {
+            self.stored.push_back(next);
         }
         self.stored.front()
     }
diff --git a/src/librustdoc/html/layout.rs b/src/librustdoc/html/layout.rs
index a60e7cb10..6ab849c92 100644
--- a/src/librustdoc/html/layout.rs
+++ b/src/librustdoc/html/layout.rs
@@ -30,7 +30,6 @@ pub(crate) struct Page<'a> {
     pub(crate) root_path: &'a str,
     pub(crate) static_root_path: Option<&'a str>,
     pub(crate) description: &'a str,
-    pub(crate) keywords: &'a str,
     pub(crate) resource_suffix: &'a str,
 }
 
diff --git a/src/librustdoc/html/length_limit.rs b/src/librustdoc/html/length_limit.rs
index bbdc91c8d..4c8db2c67 100644
--- a/src/librustdoc/html/length_limit.rs
+++ b/src/librustdoc/html/length_limit.rs
@@ -61,14 +61,14 @@ impl HtmlWithLimit {
     /// and returns [`ControlFlow::Break`].
     pub(super) fn push(&mut self, text: &str) -> ControlFlow<(), ()> {
         if self.len + text.len() > self.limit {
-            return ControlFlow::BREAK;
+            return ControlFlow::Break(());
         }
 
         self.flush_queue();
         write!(self.buf, "{}", Escape(text)).unwrap();
         self.len += text.len();
 
-        ControlFlow::CONTINUE
+        ControlFlow::Continue(())
     }
 
     /// Open an HTML tag.
diff --git a/src/librustdoc/html/length_limit/tests.rs b/src/librustdoc/html/length_limit/tests.rs
index 2d02b8a16..2185c0348 100644
--- a/src/librustdoc/html/length_limit/tests.rs
+++ b/src/librustdoc/html/length_limit/tests.rs
@@ -83,7 +83,7 @@ fn past_the_limit() {
         buf.push("word#")?;
         buf.push(&n.to_string())?;
         buf.close_tag();
-        ControlFlow::CONTINUE
+        ControlFlow::Continue(())
     });
     buf.close_tag();
     assert_eq!(
diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs
index 4ff67fe15..fe446ae3c 100644
--- a/src/librustdoc/html/markdown.rs
+++ b/src/librustdoc/html/markdown.rs
@@ -27,14 +27,14 @@
 
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def_id::DefId;
-use rustc_hir::HirId;
 use rustc_middle::ty::TyCtxt;
+pub(crate) use rustc_resolve::rustdoc::main_body_opts;
+use rustc_resolve::rustdoc::may_be_doc_link;
 use rustc_span::edition::Edition;
 use rustc_span::{Span, Symbol};
 
 use once_cell::sync::Lazy;
 use std::borrow::Cow;
-use std::cell::RefCell;
 use std::collections::VecDeque;
 use std::default::Default;
 use std::fmt::Write;
@@ -47,6 +47,7 @@ use crate::html::escape::Escape;
 use crate::html::format::Buffer;
 use crate::html::highlight;
 use crate::html::length_limit::HtmlWithLimit;
+use crate::html::render::small_url_encode;
 use crate::html::toc::TocBuilder;
 
 use pulldown_cmark::{
@@ -58,15 +59,6 @@ mod tests;
 
 const MAX_HEADER_LEVEL: u32 = 6;
 
-/// Options for rendering Markdown in the main body of documentation.
-pub(crate) fn main_body_opts() -> Options {
-    Options::ENABLE_TABLES
-        | Options::ENABLE_FOOTNOTES
-        | Options::ENABLE_STRIKETHROUGH
-        | Options::ENABLE_TASKLISTS
-        | Options::ENABLE_SMART_PUNCTUATION
-}
-
 /// Options for rendering Markdown in summaries (e.g., in search results).
 pub(crate) fn summary_opts() -> Options {
     Options::ENABLE_TABLES
@@ -103,14 +95,14 @@ pub struct Markdown<'a> {
     /// E.g. if `heading_offset: HeadingOffset::H2`, then `# something` renders an `<h2>`.
     pub heading_offset: HeadingOffset,
 }
-/// A tuple struct like `Markdown` that renders the markdown with a table of contents.
-pub(crate) struct MarkdownWithToc<'a>(
-    pub(crate) &'a str,
-    pub(crate) &'a mut IdMap,
-    pub(crate) ErrorCodes,
-    pub(crate) Edition,
-    pub(crate) &'a Option<Playground>,
-);
+/// A struct like `Markdown` that renders the markdown with a table of contents.
+pub(crate) struct MarkdownWithToc<'a> {
+    pub(crate) content: &'a str,
+    pub(crate) ids: &'a mut IdMap,
+    pub(crate) error_codes: ErrorCodes,
+    pub(crate) edition: Edition,
+    pub(crate) playground: &'a Option<Playground>,
+}
 /// A tuple struct like `Markdown` that renders the markdown escaping HTML tags
 /// and includes no paragraph tags.
 pub(crate) struct MarkdownItemInfo<'a>(pub(crate) &'a str, pub(crate) &'a mut IdMap);
@@ -295,30 +287,7 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for CodeBlocks<'_, 'a, I> {
                 doctest::make_test(&test, krate, false, &Default::default(), edition, None);
             let channel = if test.contains("#![feature(") { "&amp;version=nightly" } else { "" };
 
-            // These characters don't need to be escaped in a URI.
-            // FIXME: use a library function for percent encoding.
-            fn dont_escape(c: u8) -> bool {
-                (b'a' <= c && c <= b'z')
-                    || (b'A' <= c && c <= b'Z')
-                    || (b'0' <= c && c <= b'9')
-                    || c == b'-'
-                    || c == b'_'
-                    || c == b'.'
-                    || c == b'~'
-                    || c == b'!'
-                    || c == b'\''
-                    || c == b'('
-                    || c == b')'
-                    || c == b'*'
-            }
-            let mut test_escaped = String::new();
-            for b in test.bytes() {
-                if dont_escape(b) {
-                    test_escaped.push(char::from(b));
-                } else {
-                    write!(test_escaped, "%{:02X}", b).unwrap();
-                }
-            }
+            let test_escaped = small_url_encode(test);
             Some(format!(
                 r#"<a class="test-arrow" target="_blank" href="{}?code={}{}&amp;edition={}">Run</a>"#,
                 url, test_escaped, channel, edition,
@@ -391,6 +360,9 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for LinkReplacer<'a, I> {
                     trace!("it matched");
                     assert!(self.shortcut_link.is_none(), "shortcut links cannot be nested");
                     self.shortcut_link = Some(link);
+                    if title.is_empty() && !link.tooltip.is_empty() {
+                        *title = CowStr::Borrowed(link.tooltip.as_ref());
+                    }
                 }
             }
             // Now that we're done with the shortcut link, don't replace any more text.
@@ -441,9 +413,12 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for LinkReplacer<'a, I> {
             }
             // If this is a link, but not a shortcut link,
             // replace the URL, since the broken_link_callback was not called.
-            Some(Event::Start(Tag::Link(_, dest, _))) => {
+            Some(Event::Start(Tag::Link(_, dest, title))) => {
                 if let Some(link) = self.links.iter().find(|&link| *link.original_text == **dest) {
                     *dest = CowStr::Borrowed(link.href.as_ref());
+                    if title.is_empty() && !link.tooltip.is_empty() {
+                        *title = CowStr::Borrowed(link.tooltip.as_ref());
+                    }
                 }
             }
             // Anything else couldn't have been a valid Rust path, so no need to replace the text.
@@ -577,10 +552,7 @@ impl<'a, I: Iterator<Item = Event<'a>>> SummaryLine<'a, I> {
 }
 
 fn check_if_allowed_tag(t: &Tag<'_>) -> bool {
-    matches!(
-        t,
-        Tag::Paragraph | Tag::Item | Tag::Emphasis | Tag::Strong | Tag::Link(..) | Tag::BlockQuote
-    )
+    matches!(t, Tag::Paragraph | Tag::Emphasis | Tag::Strong | Tag::Link(..) | Tag::BlockQuote)
 }
 
 fn is_forbidden_tag(t: &Tag<'_>) -> bool {
@@ -771,11 +743,7 @@ pub(crate) fn find_testable_code<T: doctest::Tester>(
             }
             Event::Text(ref s) if register_header.is_some() => {
                 let level = register_header.unwrap();
-                if s.is_empty() {
-                    tests.register_header("", level);
-                } else {
-                    tests.register_header(s, level);
-                }
+                tests.register_header(s, level);
                 register_header = None;
             }
             _ => {}
@@ -784,45 +752,26 @@ pub(crate) fn find_testable_code<T: doctest::Tester>(
 }
 
 pub(crate) struct ExtraInfo<'tcx> {
-    id: ExtraInfoId,
+    def_id: DefId,
     sp: Span,
     tcx: TyCtxt<'tcx>,
 }
 
-enum ExtraInfoId {
-    Hir(HirId),
-    Def(DefId),
-}
-
 impl<'tcx> ExtraInfo<'tcx> {
-    pub(crate) fn new(tcx: TyCtxt<'tcx>, hir_id: HirId, sp: Span) -> ExtraInfo<'tcx> {
-        ExtraInfo { id: ExtraInfoId::Hir(hir_id), sp, tcx }
-    }
-
-    pub(crate) fn new_did(tcx: TyCtxt<'tcx>, did: DefId, sp: Span) -> ExtraInfo<'tcx> {
-        ExtraInfo { id: ExtraInfoId::Def(did), sp, tcx }
+    pub(crate) fn new(tcx: TyCtxt<'tcx>, def_id: DefId, sp: Span) -> ExtraInfo<'tcx> {
+        ExtraInfo { def_id, sp, tcx }
     }
 
     fn error_invalid_codeblock_attr(&self, msg: &str, help: &str) {
-        let hir_id = match self.id {
-            ExtraInfoId::Hir(hir_id) => hir_id,
-            ExtraInfoId::Def(item_did) => {
-                match item_did.as_local() {
-                    Some(item_did) => self.tcx.hir().local_def_id_to_hir_id(item_did),
-                    None => {
-                        // If non-local, no need to check anything.
-                        return;
-                    }
-                }
-            }
-        };
-        self.tcx.struct_span_lint_hir(
-            crate::lint::INVALID_CODEBLOCK_ATTRIBUTES,
-            hir_id,
-            self.sp,
-            msg,
-            |lint| lint.help(help),
-        );
+        if let Some(def_id) = self.def_id.as_local() {
+            self.tcx.struct_span_lint_hir(
+                crate::lint::INVALID_CODEBLOCK_ATTRIBUTES,
+                self.tcx.hir().local_def_id_to_hir_id(def_id),
+                self.sp,
+                msg,
+                |lint| lint.help(help),
+            );
+        }
     }
 }
 
@@ -1029,8 +978,8 @@ impl Markdown<'_> {
         let mut replacer = |broken_link: BrokenLink<'_>| {
             links
                 .iter()
-                .find(|link| link.original_text.as_str() == &*broken_link.reference)
-                .map(|link| (link.href.as_str().into(), link.new_text.as_str().into()))
+                .find(|link| &*link.original_text == &*broken_link.reference)
+                .map(|link| (link.href.as_str().into(), link.tooltip.as_str().into()))
         };
 
         let p = Parser::new_with_broken_link_callback(md, main_body_opts(), Some(&mut replacer));
@@ -1051,7 +1000,7 @@ impl Markdown<'_> {
 
 impl MarkdownWithToc<'_> {
     pub(crate) fn into_string(self) -> String {
-        let MarkdownWithToc(md, ids, codes, edition, playground) = self;
+        let MarkdownWithToc { content: md, ids, error_codes: codes, edition, playground } = self;
 
         let p = Parser::new_ext(md, main_body_opts()).into_offset_iter();
 
@@ -1112,8 +1061,8 @@ impl MarkdownSummaryLine<'_> {
         let mut replacer = |broken_link: BrokenLink<'_>| {
             links
                 .iter()
-                .find(|link| link.original_text.as_str() == &*broken_link.reference)
-                .map(|link| (link.href.as_str().into(), link.new_text.as_str().into()))
+                .find(|link| &*link.original_text == &*broken_link.reference)
+                .map(|link| (link.href.as_str().into(), link.tooltip.as_str().into()))
         };
 
         let p = Parser::new_with_broken_link_callback(md, summary_opts(), Some(&mut replacer))
@@ -1159,8 +1108,8 @@ fn markdown_summary_with_limit(
     let mut replacer = |broken_link: BrokenLink<'_>| {
         link_names
             .iter()
-            .find(|link| link.original_text.as_str() == &*broken_link.reference)
-            .map(|link| (link.href.as_str().into(), link.new_text.as_str().into()))
+            .find(|link| &*link.original_text == &*broken_link.reference)
+            .map(|link| (link.href.as_str().into(), link.tooltip.as_str().into()))
     };
 
     let p = Parser::new_with_broken_link_callback(md, summary_opts(), Some(&mut replacer));
@@ -1191,18 +1140,18 @@ fn markdown_summary_with_limit(
             Event::Start(tag) => match tag {
                 Tag::Emphasis => buf.open_tag("em"),
                 Tag::Strong => buf.open_tag("strong"),
-                Tag::CodeBlock(..) => return ControlFlow::BREAK,
+                Tag::CodeBlock(..) => return ControlFlow::Break(()),
                 _ => {}
             },
             Event::End(tag) => match tag {
                 Tag::Emphasis | Tag::Strong => buf.close_tag(),
-                Tag::Paragraph | Tag::Heading(..) => return ControlFlow::BREAK,
+                Tag::Paragraph | Tag::Heading(..) => return ControlFlow::Break(()),
                 _ => {}
             },
             Event::HardBreak | Event::SoftBreak => buf.push(" ")?,
             _ => {}
         };
-        ControlFlow::CONTINUE
+        ControlFlow::Continue(())
     });
 
     (buf.finish(), stopped_early)
@@ -1230,14 +1179,23 @@ pub(crate) fn short_markdown_summary(markdown: &str, link_names: &[RenderedLink]
 /// - Headings, links, and formatting are stripped.
 /// - Inline code is rendered as-is, surrounded by backticks.
 /// - HTML and code blocks are ignored.
-pub(crate) fn plain_text_summary(md: &str) -> String {
+pub(crate) fn plain_text_summary(md: &str, link_names: &[RenderedLink]) -> String {
     if md.is_empty() {
         return String::new();
     }
 
     let mut s = String::with_capacity(md.len() * 3 / 2);
 
-    for event in Parser::new_ext(md, summary_opts()) {
+    let mut replacer = |broken_link: BrokenLink<'_>| {
+        link_names
+            .iter()
+            .find(|link| &*link.original_text == &*broken_link.reference)
+            .map(|link| (link.href.as_str().into(), link.tooltip.as_str().into()))
+    };
+
+    let p = Parser::new_with_broken_link_callback(md, summary_opts(), Some(&mut replacer));
+
+    for event in p {
         match &event {
             Event::Text(text) => s.push_str(text),
             Event::Code(code) => {
@@ -1265,14 +1223,12 @@ pub(crate) struct MarkdownLink {
 
 pub(crate) fn markdown_links<R>(
     md: &str,
-    filter_map: impl Fn(MarkdownLink) -> Option<R>,
+    preprocess_link: impl Fn(MarkdownLink) -> Option<R>,
 ) -> Vec<R> {
     if md.is_empty() {
         return vec![];
     }
 
-    let links = RefCell::new(vec![]);
-
     // FIXME: remove this function once pulldown_cmark can provide spans for link definitions.
     let locate = |s: &str, fallback: Range<usize>| unsafe {
         let s_start = s.as_ptr();
@@ -1304,46 +1260,23 @@ pub(crate) fn markdown_links<R>(
         }
     };
 
-    let mut push = |link: BrokenLink<'_>| {
-        let span = span_for_link(&link.reference, link.span);
-        filter_map(MarkdownLink {
-            kind: LinkType::ShortcutUnknown,
-            link: link.reference.to_string(),
-            range: span,
-        })
-        .map(|link| links.borrow_mut().push(link));
-        None
-    };
-    let p = Parser::new_with_broken_link_callback(md, main_body_opts(), Some(&mut push))
-        .into_offset_iter();
-
-    // There's no need to thread an IdMap through to here because
-    // the IDs generated aren't going to be emitted anywhere.
-    let mut ids = IdMap::new();
-    let iter = Footnotes::new(HeadingLinks::new(p, None, &mut ids, HeadingOffset::H1));
-
-    for ev in iter {
-        if let Event::Start(Tag::Link(
-            // `<>` links cannot be intra-doc links so we skip them.
-            kind @ (LinkType::Inline
-            | LinkType::Reference
-            | LinkType::ReferenceUnknown
-            | LinkType::Collapsed
-            | LinkType::CollapsedUnknown
-            | LinkType::Shortcut
-            | LinkType::ShortcutUnknown),
-            dest,
-            _,
-        )) = ev.0
-        {
-            debug!("found link: {dest}");
-            let span = span_for_link(&dest, ev.1);
-            filter_map(MarkdownLink { kind, link: dest.into_string(), range: span })
-                .map(|link| links.borrow_mut().push(link));
+    Parser::new_with_broken_link_callback(
+        md,
+        main_body_opts(),
+        Some(&mut |link: BrokenLink<'_>| Some((link.reference, "".into()))),
+    )
+    .into_offset_iter()
+    .filter_map(|(event, span)| match event {
+        Event::Start(Tag::Link(link_type, dest, _)) if may_be_doc_link(link_type) => {
+            preprocess_link(MarkdownLink {
+                kind: link_type,
+                range: span_for_link(&dest, span),
+                link: dest.into_string(),
+            })
         }
-    }
-
-    links.into_inner()
+        _ => None,
+    })
+    .collect()
 }
 
 #[derive(Debug)]
diff --git a/src/librustdoc/html/markdown/tests.rs b/src/librustdoc/html/markdown/tests.rs
index 5878c5826..e05635a02 100644
--- a/src/librustdoc/html/markdown/tests.rs
+++ b/src/librustdoc/html/markdown/tests.rs
@@ -249,7 +249,7 @@ fn test_short_markdown_summary() {
 #[test]
 fn test_plain_text_summary() {
     fn t(input: &str, expect: &str) {
-        let output = plain_text_summary(input);
+        let output = plain_text_summary(input, &[]);
         assert_eq!(output, expect, "original: {}", input);
     }
 
diff --git a/src/librustdoc/html/render/context.rs b/src/librustdoc/html/render/context.rs
index 5cefe9475..5e4a59562 100644
--- a/src/librustdoc/html/render/context.rs
+++ b/src/librustdoc/html/render/context.rs
@@ -6,7 +6,7 @@ use std::rc::Rc;
 use std::sync::mpsc::{channel, Receiver};
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
-use rustc_hir::def_id::{DefId, LOCAL_CRATE};
+use rustc_hir::def_id::{DefIdMap, LOCAL_CRATE};
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
 use rustc_span::edition::Edition;
@@ -18,7 +18,7 @@ use super::search_index::build_index;
 use super::write_shared::write_shared;
 use super::{
     collect_spans_and_sources, print_sidebar, scrape_examples_help, sidebar_module_like, AllTypes,
-    LinkFromSrc, NameDoc, StylePath, BASIC_KEYWORDS,
+    LinkFromSrc, StylePath,
 };
 
 use crate::clean::{self, types::ExternalLocation, ExternalCrate};
@@ -56,7 +56,7 @@ pub(crate) struct Context<'tcx> {
     pub(super) render_redirect_pages: bool,
     /// Tracks section IDs for `Deref` targets so they match in both the main
     /// body and the sidebar.
-    pub(super) deref_id_map: FxHashMap<DefId, String>,
+    pub(super) deref_id_map: DefIdMap<String>,
     /// The map used to ensure all generated 'id=' attributes are unique.
     pub(super) id_map: IdMap,
     /// Shared mutable state.
@@ -182,7 +182,10 @@ impl<'tcx> Context<'tcx> {
         };
         title.push_str(" - Rust");
         let tyname = it.type_();
-        let desc = it.doc_value().as_ref().map(|doc| plain_text_summary(doc));
+        let desc = it
+            .doc_value()
+            .as_ref()
+            .map(|doc| plain_text_summary(doc, &it.link_names(&self.cache())));
         let desc = if let Some(desc) = desc {
             desc
         } else if it.is_crate() {
@@ -195,7 +198,6 @@ impl<'tcx> Context<'tcx> {
                 self.shared.layout.krate
             )
         };
-        let keywords = make_item_keywords(it);
         let name;
         let tyname_s = if it.is_crate() {
             name = format!("{} crate", tyname);
@@ -212,7 +214,6 @@ impl<'tcx> Context<'tcx> {
                 static_root_path: clone_shared.static_root_path.as_deref(),
                 title: &title,
                 description: &desc,
-                keywords: &keywords,
                 resource_suffix: &clone_shared.resource_suffix,
             };
             let mut page_buffer = Buffer::html();
@@ -258,7 +259,7 @@ impl<'tcx> Context<'tcx> {
     }
 
     /// Construct a map of items shown in the sidebar to a plain-text summary of their docs.
-    fn build_sidebar_items(&self, m: &clean::Module) -> BTreeMap<String, Vec<NameDoc>> {
+    fn build_sidebar_items(&self, m: &clean::Module) -> BTreeMap<String, Vec<String>> {
         // BTreeMap instead of HashMap to get a sorted output
         let mut map: BTreeMap<_, Vec<_>> = BTreeMap::new();
         let mut inserted: FxHashMap<ItemType, FxHashSet<Symbol>> = FxHashMap::default();
@@ -276,10 +277,7 @@ impl<'tcx> Context<'tcx> {
             if inserted.entry(short).or_default().insert(myname) {
                 let short = short.to_string();
                 let myname = myname.to_string();
-                map.entry(short).or_default().push((
-                    myname,
-                    Some(item.doc_value().map_or_else(String::new, |s| plain_text_summary(&s))),
-                ));
+                map.entry(short).or_default().push(myname);
             }
         }
 
@@ -544,7 +542,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             dst,
             render_redirect_pages: false,
             id_map,
-            deref_id_map: FxHashMap::default(),
+            deref_id_map: Default::default(),
             shared: Rc::new(scx),
             include_sources,
             types_with_notable_traits: FxHashSet::default(),
@@ -572,7 +570,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             current: self.current.clone(),
             dst: self.dst.clone(),
             render_redirect_pages: self.render_redirect_pages,
-            deref_id_map: FxHashMap::default(),
+            deref_id_map: Default::default(),
             id_map: IdMap::new(),
             shared: Rc::clone(&self.shared),
             include_sources: self.include_sources,
@@ -598,7 +596,6 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             root_path: "../",
             static_root_path: shared.static_root_path.as_deref(),
             description: "List of all items in this crate",
-            keywords: BASIC_KEYWORDS,
             resource_suffix: &shared.resource_suffix,
         };
         let all = shared.all.replace(AllTypes::new());
@@ -708,14 +705,12 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             shared.fs.write(scrape_examples_help_file, v)?;
         }
 
-        if let Some(ref redirections) = shared.redirections {
-            if !redirections.borrow().is_empty() {
-                let redirect_map_path =
-                    self.dst.join(crate_name.as_str()).join("redirect-map.json");
-                let paths = serde_json::to_string(&*redirections.borrow()).unwrap();
-                shared.ensure_dir(&self.dst.join(crate_name.as_str()))?;
-                shared.fs.write(redirect_map_path, paths)?;
-            }
+        if let Some(ref redirections) = shared.redirections && !redirections.borrow().is_empty() {
+            let redirect_map_path =
+                self.dst.join(crate_name.as_str()).join("redirect-map.json");
+            let paths = serde_json::to_string(&*redirections.borrow()).unwrap();
+            shared.ensure_dir(&self.dst.join(crate_name.as_str()))?;
+            shared.fs.write(redirect_map_path, paths)?;
         }
 
         // No need for it anymore.
@@ -828,7 +823,3 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
         &self.shared.cache
     }
 }
-
-fn make_item_keywords(it: &clean::Item) -> String {
-    format!("{}, {}", BASIC_KEYWORDS, it.name.as_ref().unwrap())
-}
diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 4fa33e890..e6a040d02 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -38,7 +38,7 @@ pub(crate) use self::span_map::{collect_spans_and_sources, LinkFromSrc};
 
 use std::collections::VecDeque;
 use std::default::Default;
-use std::fmt;
+use std::fmt::{self, Write};
 use std::fs;
 use std::iter::Peekable;
 use std::path::PathBuf;
@@ -50,7 +50,7 @@ use rustc_ast_pretty::pprust;
 use rustc_attr::{ConstStability, Deprecation, StabilityLevel};
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_hir::def::CtorKind;
-use rustc_hir::def_id::DefId;
+use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_hir::Mutability;
 use rustc_middle::middle::stability;
 use rustc_middle::ty;
@@ -83,9 +83,6 @@ use crate::scrape_examples::{CallData, CallLocation};
 use crate::try_none;
 use crate::DOC_RUST_LANG_ORG_CHANNEL;
 
-/// A pair of name and its optional document.
-pub(crate) type NameDoc = (String, Option<String>);
-
 pub(crate) fn ensure_trailing_slash(v: &str) -> impl fmt::Display + '_ {
     crate::html::format::display_fn(move |f| {
         if !v.ends_with('/') && !v.is_empty() { write!(f, "{}/", v) } else { f.write_str(v) }
@@ -1115,7 +1112,7 @@ fn render_assoc_items(
     it: DefId,
     what: AssocItemRender<'_>,
 ) {
-    let mut derefs = FxHashSet::default();
+    let mut derefs = DefIdSet::default();
     derefs.insert(it);
     render_assoc_items_inner(w, cx, containing_item, it, what, &mut derefs)
 }
@@ -1126,7 +1123,7 @@ fn render_assoc_items_inner(
     containing_item: &clean::Item,
     it: DefId,
     what: AssocItemRender<'_>,
-    derefs: &mut FxHashSet<DefId>,
+    derefs: &mut DefIdSet,
 ) {
     info!("Documenting associated items of {:?}", containing_item.name);
     let shared = Rc::clone(&cx.shared);
@@ -1215,7 +1212,7 @@ fn render_deref_methods(
     impl_: &Impl,
     container_item: &clean::Item,
     deref_mut: bool,
-    derefs: &mut FxHashSet<DefId>,
+    derefs: &mut DefIdSet,
 ) {
     let cache = cx.cache();
     let deref_type = impl_.inner_impl().trait_.as_ref().unwrap();
@@ -1313,7 +1310,7 @@ pub(crate) fn notable_traits_button(ty: &clean::Type, cx: &mut Context<'_>) -> O
     if has_notable_trait {
         cx.types_with_notable_traits.insert(ty.clone());
         Some(format!(
-            " <a href=\"#\" class=\"notable-traits\" data-ty=\"{ty}\">ⓘ</a>",
+            " <a href=\"#\" class=\"tooltip\" data-notable-ty=\"{ty}\">ⓘ</a>",
             ty = Escape(&format!("{:#}", ty.print(cx))),
         ))
     } else {
@@ -1528,11 +1525,7 @@ fn render_impl(
                             })
                         })
                         .map(|item| format!("{}.{}", item.type_(), name));
-                    write!(
-                        w,
-                        "<section id=\"{}\" class=\"{}{} has-srclink\">",
-                        id, item_type, in_trait_class,
-                    );
+                    write!(w, "<section id=\"{}\" class=\"{}{}\">", id, item_type, in_trait_class,);
                     render_rightside(w, cx, item, containing_item, render_mode);
                     if trait_.is_some() {
                         // Anchors are only used on trait impls.
@@ -1554,11 +1547,7 @@ fn render_impl(
             kind @ (clean::TyAssocConstItem(ty) | clean::AssocConstItem(ty, _)) => {
                 let source_id = format!("{}.{}", item_type, name);
                 let id = cx.derive_id(source_id.clone());
-                write!(
-                    w,
-                    "<section id=\"{}\" class=\"{}{} has-srclink\">",
-                    id, item_type, in_trait_class
-                );
+                write!(w, "<section id=\"{}\" class=\"{}{}\">", id, item_type, in_trait_class);
                 render_rightside(w, cx, item, containing_item, render_mode);
                 if trait_.is_some() {
                     // Anchors are only used on trait impls.
@@ -1606,11 +1595,7 @@ fn render_impl(
             clean::AssocTypeItem(tydef, _bounds) => {
                 let source_id = format!("{}.{}", item_type, name);
                 let id = cx.derive_id(source_id.clone());
-                write!(
-                    w,
-                    "<section id=\"{}\" class=\"{}{} has-srclink\">",
-                    id, item_type, in_trait_class
-                );
+                write!(w, "<section id=\"{}\" class=\"{}{}\">", id, item_type, in_trait_class);
                 if trait_.is_some() {
                     // Anchors are only used on trait impls.
                     write!(w, "<a href=\"#{}\" class=\"anchor\">§</a>", id);
@@ -1844,7 +1829,7 @@ pub(crate) fn render_impl_summary(
     } else {
         format!(" data-aliases=\"{}\"", aliases.join(","))
     };
-    write!(w, "<section id=\"{}\" class=\"impl has-srclink\"{}>", id, aliases);
+    write!(w, "<section id=\"{}\" class=\"impl\"{}>", id, aliases);
     render_rightside(w, cx, &i.impl_item, containing_item, RenderMode::Normal);
     write!(w, "<a href=\"#{}\" class=\"anchor\">§</a>", id);
     write!(w, "<h3 class=\"code-header\">");
@@ -2032,31 +2017,60 @@ fn get_associated_constants(
         .collect::<Vec<_>>()
 }
 
-// The point is to url encode any potential character from a type with genericity.
-fn small_url_encode(s: String) -> String {
+pub(crate) fn small_url_encode(s: String) -> String {
+    // These characters don't need to be escaped in a URI.
+    // See https://url.spec.whatwg.org/#query-percent-encode-set
+    // and https://url.spec.whatwg.org/#urlencoded-parsing
+    // and https://url.spec.whatwg.org/#url-code-points
+    fn dont_escape(c: u8) -> bool {
+        (b'a' <= c && c <= b'z')
+            || (b'A' <= c && c <= b'Z')
+            || (b'0' <= c && c <= b'9')
+            || c == b'-'
+            || c == b'_'
+            || c == b'.'
+            || c == b','
+            || c == b'~'
+            || c == b'!'
+            || c == b'\''
+            || c == b'('
+            || c == b')'
+            || c == b'*'
+            || c == b'/'
+            || c == b';'
+            || c == b':'
+            || c == b'?'
+            // As described in urlencoded-parsing, the
+            // first `=` is the one that separates key from
+            // value. Following `=`s are part of the value.
+            || c == b'='
+    }
     let mut st = String::new();
     let mut last_match = 0;
-    for (idx, c) in s.char_indices() {
-        let escaped = match c {
-            '<' => "%3C",
-            '>' => "%3E",
-            ' ' => "%20",
-            '?' => "%3F",
-            '\'' => "%27",
-            '&' => "%26",
-            ',' => "%2C",
-            ':' => "%3A",
-            ';' => "%3B",
-            '[' => "%5B",
-            ']' => "%5D",
-            '"' => "%22",
-            _ => continue,
-        };
+    for (idx, b) in s.bytes().enumerate() {
+        if dont_escape(b) {
+            continue;
+        }
 
-        st += &s[last_match..idx];
-        st += escaped;
-        // NOTE: we only expect single byte characters here - which is fine as long as we
-        // only match single byte characters
+        if last_match != idx {
+            // Invariant: `idx` must be the first byte in a character at this point.
+            st += &s[last_match..idx];
+        }
+        if b == b' ' {
+            // URL queries are decoded with + replaced with SP.
+            // While the same is not true for hashes, rustdoc only needs to be
+            // consistent with itself when encoding them.
+            st += "+";
+        } else if b == b'%' {
+            st += "%%";
+        } else {
+            write!(st, "%{:02X}", b).unwrap();
+        }
+        // Invariant: if the current byte is not at the start of a multi-byte character,
+        // we need to get down here so that when the next turn of the loop comes around,
+        // last_match winds up equalling idx.
+        //
+        // In other words, dont_escape must always return `false` in multi-byte character.
         last_match = idx + 1;
     }
 
@@ -2175,7 +2189,7 @@ fn sidebar_assoc_items(cx: &Context<'_>, out: &mut Buffer, it: &clean::Item) {
             if let Some(impl_) =
                 v.iter().find(|i| i.trait_did() == cx.tcx().lang_items().deref_trait())
             {
-                let mut derefs = FxHashSet::default();
+                let mut derefs = DefIdSet::default();
                 derefs.insert(did);
                 sidebar_deref_methods(cx, out, impl_, v, &mut derefs, &mut used_links);
             }
@@ -2195,7 +2209,7 @@ fn sidebar_deref_methods(
     out: &mut Buffer,
     impl_: &Impl,
     v: &[Impl],
-    derefs: &mut FxHashSet<DefId>,
+    derefs: &mut DefIdSet,
     used_links: &mut FxHashSet<String>,
 ) {
     let c = cx.cache();
@@ -2211,14 +2225,13 @@ fn sidebar_deref_methods(
         })
     {
         debug!("found target, real_target: {:?} {:?}", target, real_target);
-        if let Some(did) = target.def_id(c) {
-            if let Some(type_did) = impl_.inner_impl().for_.def_id(c) {
-                // `impl Deref<Target = S> for S`
-                if did == type_did || !derefs.insert(did) {
-                    // Avoid infinite cycles
-                    return;
-                }
-            }
+        if let Some(did) = target.def_id(c) &&
+            let Some(type_did) = impl_.inner_impl().for_.def_id(c) &&
+            // `impl Deref<Target = S> for S`
+            (did == type_did || !derefs.insert(did))
+        {
+            // Avoid infinite cycles
+            return;
         }
         let deref_mut = v.iter().any(|i| i.trait_did() == cx.tcx().lang_items().deref_mut_trait());
         let inner_impl = target
@@ -2252,25 +2265,24 @@ fn sidebar_deref_methods(
         }
 
         // Recurse into any further impls that might exist for `target`
-        if let Some(target_did) = target.def_id(c) {
-            if let Some(target_impls) = c.impls.get(&target_did) {
-                if let Some(target_deref_impl) = target_impls.iter().find(|i| {
-                    i.inner_impl()
-                        .trait_
-                        .as_ref()
-                        .map(|t| Some(t.def_id()) == cx.tcx().lang_items().deref_trait())
-                        .unwrap_or(false)
-                }) {
-                    sidebar_deref_methods(
-                        cx,
-                        out,
-                        target_deref_impl,
-                        target_impls,
-                        derefs,
-                        used_links,
-                    );
-                }
-            }
+        if let Some(target_did) = target.def_id(c) &&
+            let Some(target_impls) = c.impls.get(&target_did) &&
+            let Some(target_deref_impl) = target_impls.iter().find(|i| {
+                i.inner_impl()
+                    .trait_
+                    .as_ref()
+                    .map(|t| Some(t.def_id()) == cx.tcx().lang_items().deref_trait())
+                    .unwrap_or(false)
+            })
+        {
+            sidebar_deref_methods(
+                cx,
+                out,
+                target_deref_impl,
+                target_impls,
+                derefs,
+                used_links,
+            );
         }
     }
 }
@@ -2755,8 +2767,6 @@ fn sidebar_foreign_type(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item) {
     }
 }
 
-pub(crate) const BASIC_KEYWORDS: &str = "rust, rustlang, rust-lang";
-
 /// Returns a list of all paths used in the type.
 /// This is used to help deduplicate imported impls
 /// for reexported types. If any of the contained
diff --git a/src/librustdoc/html/render/print_item.rs b/src/librustdoc/html/render/print_item.rs
index f824c9e3a..2869a3961 100644
--- a/src/librustdoc/html/render/print_item.rs
+++ b/src/librustdoc/html/render/print_item.rs
@@ -10,7 +10,7 @@ use rustc_middle::ty::layout::LayoutError;
 use rustc_middle::ty::{self, Adt, TyCtxt};
 use rustc_span::hygiene::MacroKind;
 use rustc_span::symbol::{kw, sym, Symbol};
-use rustc_target::abi::{LayoutS, Primitive, TagEncoding, VariantIdx, Variants};
+use rustc_target::abi::{LayoutS, Primitive, TagEncoding, Variants};
 use std::cmp::Ordering;
 use std::fmt;
 use std::rc::Rc;
@@ -39,10 +39,10 @@ use crate::html::{highlight, static_files};
 use askama::Template;
 use itertools::Itertools;
 
-const ITEM_TABLE_OPEN: &str = "<div class=\"item-table\">";
-const ITEM_TABLE_CLOSE: &str = "</div>";
-const ITEM_TABLE_ROW_OPEN: &str = "<div class=\"item-row\">";
-const ITEM_TABLE_ROW_CLOSE: &str = "</div>";
+const ITEM_TABLE_OPEN: &str = "<ul class=\"item-table\">";
+const ITEM_TABLE_CLOSE: &str = "</ul>";
+const ITEM_TABLE_ROW_OPEN: &str = "<li>";
+const ITEM_TABLE_ROW_CLOSE: &str = "</li>";
 
 // A component in a `use` path, like `string` in std::string::ToString
 struct PathComponent {
@@ -338,14 +338,14 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
                 match *src {
                     Some(src) => write!(
                         w,
-                        "<div class=\"item-left\"><code>{}extern crate {} as {};",
+                        "<div class=\"item-name\"><code>{}extern crate {} as {};",
                         visibility_print_with_space(myitem.visibility(tcx), myitem.item_id, cx),
                         anchor(myitem.item_id.expect_def_id(), src, cx),
                         myitem.name.unwrap(),
                     ),
                     None => write!(
                         w,
-                        "<div class=\"item-left\"><code>{}extern crate {};",
+                        "<div class=\"item-name\"><code>{}extern crate {};",
                         visibility_print_with_space(myitem.visibility(tcx), myitem.item_id, cx),
                         anchor(myitem.item_id.expect_def_id(), myitem.name.unwrap(), cx),
                     ),
@@ -355,7 +355,7 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
             }
 
             clean::ImportItem(ref import) => {
-                let (stab, stab_tags) = if let Some(import_def_id) = import.source.did {
+                let stab_tags = if let Some(import_def_id) = import.source.did {
                     let ast_attrs = cx.tcx().get_attrs_unchecked(import_def_id);
                     let import_attrs = Box::new(clean::Attributes::from_ast(ast_attrs));
 
@@ -367,15 +367,12 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
                         ..myitem.clone()
                     };
 
-                    let stab = import_item.stability_class(cx.tcx());
                     let stab_tags = Some(extra_info_tags(&import_item, item, cx.tcx()));
-                    (stab, stab_tags)
+                    stab_tags
                 } else {
-                    (None, None)
+                    None
                 };
 
-                let add = if stab.is_some() { " " } else { "" };
-
                 w.write_str(ITEM_TABLE_ROW_OPEN);
                 let id = match import.kind {
                     clean::ImportKind::Simple(s) => {
@@ -387,15 +384,14 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
                 let (stab_tags_before, stab_tags_after) = if stab_tags.is_empty() {
                     ("", "")
                 } else {
-                    ("<div class=\"item-right docblock-short\">", "</div>")
+                    ("<div class=\"desc docblock-short\">", "</div>")
                 };
                 write!(
                     w,
-                    "<div class=\"item-left {stab}{add}import-item\"{id}>\
+                    "<div class=\"item-name\"{id}>\
                          <code>{vis}{imp}</code>\
                      </div>\
                      {stab_tags_before}{stab_tags}{stab_tags_after}",
-                    stab = stab.unwrap_or_default(),
                     vis = visibility_print_with_space(myitem.visibility(tcx), myitem.item_id, cx),
                     imp = import.print(cx),
                 );
@@ -417,9 +413,6 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
                     _ => "",
                 };
 
-                let stab = myitem.stability_class(cx.tcx());
-                let add = if stab.is_some() { " " } else { "" };
-
                 let visibility_emoji = match myitem.visibility(tcx) {
                     Some(ty::Visibility::Restricted(_)) => {
                         "<span title=\"Restricted Visibility\">&nbsp;🔒</span> "
@@ -433,11 +426,11 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
                 let (docs_before, docs_after) = if docs.is_empty() {
                     ("", "")
                 } else {
-                    ("<div class=\"item-right docblock-short\">", "</div>")
+                    ("<div class=\"desc docblock-short\">", "</div>")
                 };
                 write!(
                     w,
-                    "<div class=\"item-left {stab}{add}module-item\">\
+                    "<div class=\"item-name\">\
                         <a class=\"{class}\" href=\"{href}\" title=\"{title}\">{name}</a>\
                         {visibility_emoji}\
                         {unsafety_flag}\
@@ -448,11 +441,9 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
                     visibility_emoji = visibility_emoji,
                     stab_tags = extra_info_tags(myitem, item, cx.tcx()),
                     class = myitem.type_(),
-                    add = add,
-                    stab = stab.unwrap_or_default(),
                     unsafety_flag = unsafety_flag,
                     href = item_path(myitem.type_(), myitem.name.unwrap().as_str()),
-                    title = [full_path(cx, myitem), myitem.type_().to_string()]
+                    title = [myitem.type_().to_string(), full_path(cx, myitem)]
                         .iter()
                         .filter_map(|s| if !s.is_empty() { Some(s.as_str()) } else { None })
                         .collect::<Vec<_>>()
@@ -530,26 +521,24 @@ fn item_function(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, f: &cle
     let notable_traits =
         f.decl.output.as_return().and_then(|output| notable_traits_button(output, cx));
 
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_pre(w, it, "");
-            w.reserve(header_len);
-            write!(
-                w,
-                "{vis}{constness}{asyncness}{unsafety}{abi}fn \
-                 {name}{generics}{decl}{notable_traits}{where_clause}",
-                vis = visibility,
-                constness = constness,
-                asyncness = asyncness,
-                unsafety = unsafety,
-                abi = abi,
-                name = name,
-                generics = f.generics.print(cx),
-                where_clause = print_where_clause(&f.generics, cx, 0, Ending::Newline),
-                decl = f.decl.full_print(header_len, 0, cx),
-                notable_traits = notable_traits.unwrap_or_default(),
-            );
-        });
+    wrap_item(w, |w| {
+        render_attributes_in_pre(w, it, "");
+        w.reserve(header_len);
+        write!(
+            w,
+            "{vis}{constness}{asyncness}{unsafety}{abi}fn \
+                {name}{generics}{decl}{notable_traits}{where_clause}",
+            vis = visibility,
+            constness = constness,
+            asyncness = asyncness,
+            unsafety = unsafety,
+            abi = abi,
+            name = name,
+            generics = f.generics.print(cx),
+            where_clause = print_where_clause(&f.generics, cx, 0, Ending::Newline),
+            decl = f.decl.full_print(header_len, 0, cx),
+            notable_traits = notable_traits.unwrap_or_default(),
+        );
     });
     document(w, cx, it, None, HeadingOffset::H2);
 }
@@ -569,145 +558,140 @@ fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean:
     let must_implement_one_of_functions = tcx.trait_def(t.def_id).must_implement_one_of.clone();
 
     // Output the trait definition
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_pre(w, it, "");
-            write!(
-                w,
-                "{}{}{}trait {}{}{}",
-                visibility_print_with_space(it.visibility(tcx), it.item_id, cx),
-                t.unsafety(tcx).print_with_space(),
-                if t.is_auto(tcx) { "auto " } else { "" },
-                it.name.unwrap(),
-                t.generics.print(cx),
-                bounds
-            );
+    wrap_item(w, |w| {
+        render_attributes_in_pre(w, it, "");
+        write!(
+            w,
+            "{}{}{}trait {}{}{}",
+            visibility_print_with_space(it.visibility(tcx), it.item_id, cx),
+            t.unsafety(tcx).print_with_space(),
+            if t.is_auto(tcx) { "auto " } else { "" },
+            it.name.unwrap(),
+            t.generics.print(cx),
+            bounds
+        );
 
-            if !t.generics.where_predicates.is_empty() {
-                write!(w, "{}", print_where_clause(&t.generics, cx, 0, Ending::Newline));
-            } else {
-                w.write_str(" ");
-            }
+        if !t.generics.where_predicates.is_empty() {
+            write!(w, "{}", print_where_clause(&t.generics, cx, 0, Ending::Newline));
+        } else {
+            w.write_str(" ");
+        }
 
-            if t.items.is_empty() {
-                w.write_str("{ }");
-            } else {
-                // FIXME: we should be using a derived_id for the Anchors here
-                w.write_str("{\n");
-                let mut toggle = false;
-
-                // If there are too many associated types, hide _everything_
-                if should_hide_fields(count_types) {
-                    toggle = true;
-                    toggle_open(
-                        w,
-                        format_args!(
-                            "{} associated items",
-                            count_types + count_consts + count_methods
-                        ),
-                    );
-                }
-                for types in [&required_types, &provided_types] {
-                    for t in types {
-                        render_assoc_item(
-                            w,
-                            t,
-                            AssocItemLink::Anchor(None),
-                            ItemType::Trait,
-                            cx,
-                            RenderMode::Normal,
-                        );
-                        w.write_str(";\n");
-                    }
-                }
-                // If there are too many associated constants, hide everything after them
-                // We also do this if the types + consts is large because otherwise we could
-                // render a bunch of types and _then_ a bunch of consts just because both were
-                // _just_ under the limit
-                if !toggle && should_hide_fields(count_types + count_consts) {
-                    toggle = true;
-                    toggle_open(
-                        w,
-                        format_args!(
-                            "{} associated constant{} and {} method{}",
-                            count_consts,
-                            pluralize(count_consts),
-                            count_methods,
-                            pluralize(count_methods),
-                        ),
-                    );
-                }
-                if count_types != 0 && (count_consts != 0 || count_methods != 0) {
-                    w.write_str("\n");
-                }
-                for consts in [&required_consts, &provided_consts] {
-                    for c in consts {
-                        render_assoc_item(
-                            w,
-                            c,
-                            AssocItemLink::Anchor(None),
-                            ItemType::Trait,
-                            cx,
-                            RenderMode::Normal,
-                        );
-                        w.write_str(";\n");
-                    }
-                }
-                if !toggle && should_hide_fields(count_methods) {
-                    toggle = true;
-                    toggle_open(w, format_args!("{} methods", count_methods));
-                }
-                if count_consts != 0 && count_methods != 0 {
-                    w.write_str("\n");
-                }
-                for (pos, m) in required_methods.iter().enumerate() {
+        if t.items.is_empty() {
+            w.write_str("{ }");
+        } else {
+            // FIXME: we should be using a derived_id for the Anchors here
+            w.write_str("{\n");
+            let mut toggle = false;
+
+            // If there are too many associated types, hide _everything_
+            if should_hide_fields(count_types) {
+                toggle = true;
+                toggle_open(
+                    w,
+                    format_args!("{} associated items", count_types + count_consts + count_methods),
+                );
+            }
+            for types in [&required_types, &provided_types] {
+                for t in types {
                     render_assoc_item(
                         w,
-                        m,
+                        t,
                         AssocItemLink::Anchor(None),
                         ItemType::Trait,
                         cx,
                         RenderMode::Normal,
                     );
                     w.write_str(";\n");
-
-                    if pos < required_methods.len() - 1 {
-                        w.write_str("<span class=\"item-spacer\"></span>");
-                    }
-                }
-                if !required_methods.is_empty() && !provided_methods.is_empty() {
-                    w.write_str("\n");
                 }
-                for (pos, m) in provided_methods.iter().enumerate() {
+            }
+            // If there are too many associated constants, hide everything after them
+            // We also do this if the types + consts is large because otherwise we could
+            // render a bunch of types and _then_ a bunch of consts just because both were
+            // _just_ under the limit
+            if !toggle && should_hide_fields(count_types + count_consts) {
+                toggle = true;
+                toggle_open(
+                    w,
+                    format_args!(
+                        "{} associated constant{} and {} method{}",
+                        count_consts,
+                        pluralize(count_consts),
+                        count_methods,
+                        pluralize(count_methods),
+                    ),
+                );
+            }
+            if count_types != 0 && (count_consts != 0 || count_methods != 0) {
+                w.write_str("\n");
+            }
+            for consts in [&required_consts, &provided_consts] {
+                for c in consts {
                     render_assoc_item(
                         w,
-                        m,
+                        c,
                         AssocItemLink::Anchor(None),
                         ItemType::Trait,
                         cx,
                         RenderMode::Normal,
                     );
-                    match *m.kind {
-                        clean::MethodItem(ref inner, _)
-                            if !inner.generics.where_predicates.is_empty() =>
-                        {
-                            w.write_str(",\n    { ... }\n");
-                        }
-                        _ => {
-                            w.write_str(" { ... }\n");
-                        }
-                    }
+                    w.write_str(";\n");
+                }
+            }
+            if !toggle && should_hide_fields(count_methods) {
+                toggle = true;
+                toggle_open(w, format_args!("{} methods", count_methods));
+            }
+            if count_consts != 0 && count_methods != 0 {
+                w.write_str("\n");
+            }
 
-                    if pos < provided_methods.len() - 1 {
-                        w.write_str("<span class=\"item-spacer\"></span>");
-                    }
+            if !required_methods.is_empty() {
+                write!(w, "    // Required method{}\n", pluralize(required_methods.len()));
+            }
+            for (pos, m) in required_methods.iter().enumerate() {
+                render_assoc_item(
+                    w,
+                    m,
+                    AssocItemLink::Anchor(None),
+                    ItemType::Trait,
+                    cx,
+                    RenderMode::Normal,
+                );
+                w.write_str(";\n");
+
+                if pos < required_methods.len() - 1 {
+                    w.write_str("<span class=\"item-spacer\"></span>");
                 }
-                if toggle {
-                    toggle_close(w);
+            }
+            if !required_methods.is_empty() && !provided_methods.is_empty() {
+                w.write_str("\n");
+            }
+
+            if !provided_methods.is_empty() {
+                write!(w, "    // Provided method{}\n", pluralize(provided_methods.len()));
+            }
+            for (pos, m) in provided_methods.iter().enumerate() {
+                render_assoc_item(
+                    w,
+                    m,
+                    AssocItemLink::Anchor(None),
+                    ItemType::Trait,
+                    cx,
+                    RenderMode::Normal,
+                );
+
+                w.write_str(" { ... }\n");
+
+                if pos < provided_methods.len() - 1 {
+                    w.write_str("<span class=\"item-spacer\"></span>");
                 }
-                w.write_str("}");
             }
-        });
+            if toggle {
+                toggle_close(w);
+            }
+            w.write_str("}");
+        }
     });
 
     // Trait documentation
@@ -735,7 +719,7 @@ fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean:
             let method_toggle_class = if item_type.is_method() { " method-toggle" } else { "" };
             write!(w, "<details class=\"toggle{method_toggle_class}\" open><summary>");
         }
-        write!(w, "<section id=\"{}\" class=\"method has-srclink\">", id);
+        write!(w, "<section id=\"{}\" class=\"method\">", id);
         render_rightside(w, cx, m, t, RenderMode::Normal);
         write!(w, "<h4 class=\"code-header\">");
         render_assoc_item(
@@ -1050,18 +1034,16 @@ fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean:
 }
 
 fn item_trait_alias(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::TraitAlias) {
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_pre(w, it, "");
-            write!(
-                w,
-                "trait {}{}{} = {};",
-                it.name.unwrap(),
-                t.generics.print(cx),
-                print_where_clause(&t.generics, cx, 0, Ending::Newline),
-                bounds(&t.bounds, true, cx)
-            );
-        });
+    wrap_item(w, |w| {
+        render_attributes_in_pre(w, it, "");
+        write!(
+            w,
+            "trait {}{}{} = {};",
+            it.name.unwrap(),
+            t.generics.print(cx),
+            print_where_clause(&t.generics, cx, 0, Ending::Newline),
+            bounds(&t.bounds, true, cx)
+        );
     });
 
     document(w, cx, it, None, HeadingOffset::H2);
@@ -1074,18 +1056,16 @@ fn item_trait_alias(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &
 }
 
 fn item_opaque_ty(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::OpaqueTy) {
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_pre(w, it, "");
-            write!(
-                w,
-                "type {}{}{where_clause} = impl {bounds};",
-                it.name.unwrap(),
-                t.generics.print(cx),
-                where_clause = print_where_clause(&t.generics, cx, 0, Ending::Newline),
-                bounds = bounds(&t.bounds, false, cx),
-            );
-        });
+    wrap_item(w, |w| {
+        render_attributes_in_pre(w, it, "");
+        write!(
+            w,
+            "type {}{}{where_clause} = impl {bounds};",
+            it.name.unwrap(),
+            t.generics.print(cx),
+            where_clause = print_where_clause(&t.generics, cx, 0, Ending::Newline),
+            bounds = bounds(&t.bounds, false, cx),
+        );
     });
 
     document(w, cx, it, None, HeadingOffset::H2);
@@ -1101,10 +1081,10 @@ fn item_typedef(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clea
     fn write_content(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, t: &clean::Typedef) {
         wrap_item(w, |w| {
             render_attributes_in_pre(w, it, "");
-            write!(w, "{}", visibility_print_with_space(it.visibility(cx.tcx()), it.item_id, cx));
             write!(
                 w,
-                "type {}{}{where_clause} = {type_};",
+                "{}type {}{}{where_clause} = {type_};",
+                visibility_print_with_space(it.visibility(cx.tcx()), it.item_id, cx),
                 it.name.unwrap(),
                 t.generics.print(cx),
                 where_clause = print_where_clause(&t.generics, cx, 0, Ending::Newline),
@@ -1113,7 +1093,7 @@ fn item_typedef(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clea
         });
     }
 
-    wrap_into_item_decl(w, |w| write_content(w, cx, it, t));
+    write_content(w, cx, it, t);
 
     document(w, cx, it, None, HeadingOffset::H2);
 
@@ -1127,11 +1107,9 @@ fn item_typedef(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clea
 }
 
 fn item_union(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean::Union) {
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_pre(w, it, "");
-            render_union(w, it, Some(&s.generics), &s.fields, "", cx);
-        });
+    wrap_item(w, |w| {
+        render_attributes_in_pre(w, it, "");
+        render_union(w, it, Some(&s.generics), &s.fields, cx);
     });
 
     document(w, cx, it, None, HeadingOffset::H2);
@@ -1160,13 +1138,11 @@ fn item_union(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean:
                      <a href=\"#{id}\" class=\"anchor field\">§</a>\
                      <code>{name}: {ty}</code>\
                  </span>",
-                id = id,
-                name = name,
                 shortty = ItemType::StructField,
                 ty = ty.print(cx),
             );
             if let Some(stability_class) = field.stability_class(cx.tcx()) {
-                write!(w, "<span class=\"stab {stab}\"></span>", stab = stability_class);
+                write!(w, "<span class=\"stab {stability_class}\"></span>");
             }
             document(w, cx, field, Some(it), HeadingOffset::H3);
         }
@@ -1179,7 +1155,7 @@ fn item_union(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean:
 fn print_tuple_struct_fields(w: &mut Buffer, cx: &Context<'_>, s: &[clean::Item]) {
     for (i, ty) in s.iter().enumerate() {
         if i > 0 {
-            w.write_str(",&nbsp;");
+            w.write_str(", ");
         }
         match *ty.kind {
             clean::StrippedItem(box clean::StructFieldItem(_)) => w.write_str("_"),
@@ -1192,60 +1168,58 @@ fn print_tuple_struct_fields(w: &mut Buffer, cx: &Context<'_>, s: &[clean::Item]
 fn item_enum(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, e: &clean::Enum) {
     let tcx = cx.tcx();
     let count_variants = e.variants().count();
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_pre(w, it, "");
-            write!(
-                w,
-                "{}enum {}{}",
-                visibility_print_with_space(it.visibility(tcx), it.item_id, cx),
-                it.name.unwrap(),
-                e.generics.print(cx),
-            );
-            if !print_where_clause_and_check(w, &e.generics, cx) {
-                // If there wasn't a `where` clause, we add a whitespace.
-                w.write_str(" ");
-            }
+    wrap_item(w, |w| {
+        render_attributes_in_pre(w, it, "");
+        write!(
+            w,
+            "{}enum {}{}",
+            visibility_print_with_space(it.visibility(tcx), it.item_id, cx),
+            it.name.unwrap(),
+            e.generics.print(cx),
+        );
+        if !print_where_clause_and_check(w, &e.generics, cx) {
+            // If there wasn't a `where` clause, we add a whitespace.
+            w.write_str(" ");
+        }
 
-            let variants_stripped = e.has_stripped_entries();
-            if count_variants == 0 && !variants_stripped {
-                w.write_str("{}");
-            } else {
-                w.write_str("{\n");
-                let toggle = should_hide_fields(count_variants);
-                if toggle {
-                    toggle_open(w, format_args!("{} variants", count_variants));
-                }
-                for v in e.variants() {
-                    w.write_str("    ");
-                    let name = v.name.unwrap();
-                    match *v.kind {
-                        // FIXME(#101337): Show discriminant
-                        clean::VariantItem(ref var) => match var.kind {
-                            clean::VariantKind::CLike => write!(w, "{}", name),
-                            clean::VariantKind::Tuple(ref s) => {
-                                write!(w, "{}(", name);
-                                print_tuple_struct_fields(w, cx, s);
-                                w.write_str(")");
-                            }
-                            clean::VariantKind::Struct(ref s) => {
-                                render_struct(w, v, None, None, &s.fields, "    ", false, cx);
-                            }
-                        },
-                        _ => unreachable!(),
-                    }
-                    w.write_str(",\n");
+        let variants_stripped = e.has_stripped_entries();
+        if count_variants == 0 && !variants_stripped {
+            w.write_str("{}");
+        } else {
+            w.write_str("{\n");
+            let toggle = should_hide_fields(count_variants);
+            if toggle {
+                toggle_open(w, format_args!("{} variants", count_variants));
+            }
+            for v in e.variants() {
+                w.write_str("    ");
+                let name = v.name.unwrap();
+                match *v.kind {
+                    // FIXME(#101337): Show discriminant
+                    clean::VariantItem(ref var) => match var.kind {
+                        clean::VariantKind::CLike => write!(w, "{}", name),
+                        clean::VariantKind::Tuple(ref s) => {
+                            write!(w, "{}(", name);
+                            print_tuple_struct_fields(w, cx, s);
+                            w.write_str(")");
+                        }
+                        clean::VariantKind::Struct(ref s) => {
+                            render_struct(w, v, None, None, &s.fields, "    ", false, cx);
+                        }
+                    },
+                    _ => unreachable!(),
                 }
+                w.write_str(",\n");
+            }
 
-                if variants_stripped {
-                    w.write_str("    // some variants omitted\n");
-                }
-                if toggle {
-                    toggle_close(w);
-                }
-                w.write_str("}");
+            if variants_stripped {
+                w.write_str("    // some variants omitted\n");
             }
-        });
+            if toggle {
+                toggle_close(w);
+            }
+            w.write_str("}");
+        }
     });
 
     document(w, cx, it, None, HeadingOffset::H2);
@@ -1266,7 +1240,6 @@ fn item_enum(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, e: &clean::
                 w,
                 "<section id=\"{id}\" class=\"variant\">\
                     <a href=\"#{id}\" class=\"anchor\">§</a>",
-                id = id,
             );
             render_stability_since_raw_with_extra(
                 w,
@@ -1304,8 +1277,11 @@ fn item_enum(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, e: &clean::
             if let Some((heading, fields)) = heading_and_fields {
                 let variant_id =
                     cx.derive_id(format!("{}.{}.fields", ItemType::Variant, variant.name.unwrap()));
-                write!(w, "<div class=\"sub-variant\" id=\"{id}\">", id = variant_id);
-                write!(w, "<h4>{heading}</h4>", heading = heading);
+                write!(
+                    w,
+                    "<div class=\"sub-variant\" id=\"{variant_id}\">\
+                        <h4>{heading}</h4>",
+                );
                 document_non_exhaustive(w, variant);
                 for field in fields {
                     match *field.kind {
@@ -1321,9 +1297,8 @@ fn item_enum(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, e: &clean::
                                 "<div class=\"sub-variant-field\">\
                                  <span id=\"{id}\" class=\"small-section-header\">\
                                      <a href=\"#{id}\" class=\"anchor field\">§</a>\
-                                     <code>{f}:&nbsp;{t}</code>\
+                                     <code>{f}: {t}</code>\
                                  </span>",
-                                id = id,
                                 f = field.name.unwrap(),
                                 t = ty.print(cx)
                             );
@@ -1346,38 +1321,30 @@ fn item_enum(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, e: &clean::
 }
 
 fn item_macro(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::Macro) {
-    wrap_into_item_decl(w, |w| {
-        highlight::render_macro_with_highlighting(&t.source, w);
-    });
+    highlight::render_item_decl_with_highlighting(&t.source, w);
     document(w, cx, it, None, HeadingOffset::H2)
 }
 
 fn item_proc_macro(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, m: &clean::ProcMacro) {
-    wrap_into_item_decl(w, |w| {
+    wrap_item(w, |w| {
         let name = it.name.expect("proc-macros always have names");
         match m.kind {
             MacroKind::Bang => {
-                wrap_item(w, |w| {
-                    write!(w, "{}!() {{ /* proc-macro */ }}", name);
-                });
+                write!(w, "{}!() {{ /* proc-macro */ }}", name);
             }
             MacroKind::Attr => {
-                wrap_item(w, |w| {
-                    write!(w, "#[{}]", name);
-                });
+                write!(w, "#[{}]", name);
             }
             MacroKind::Derive => {
-                wrap_item(w, |w| {
-                    write!(w, "#[derive({})]", name);
-                    if !m.helpers.is_empty() {
-                        w.push_str("\n{\n");
-                        w.push_str("    // Attributes available to this derive:\n");
-                        for attr in &m.helpers {
-                            writeln!(w, "    #[{}]", attr);
-                        }
-                        w.push_str("}\n");
+                write!(w, "#[derive({})]", name);
+                if !m.helpers.is_empty() {
+                    w.push_str("\n{\n");
+                    w.push_str("    // Attributes available to this derive:\n");
+                    for attr in &m.helpers {
+                        writeln!(w, "    #[{}]", attr);
                     }
-                });
+                    w.push_str("}\n");
+                }
             }
         }
     });
@@ -1400,61 +1367,57 @@ fn item_primitive(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item) {
 }
 
 fn item_constant(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, c: &clean::Constant) {
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            let tcx = cx.tcx();
-            render_attributes_in_code(w, it);
+    wrap_item(w, |w| {
+        let tcx = cx.tcx();
+        render_attributes_in_code(w, it);
 
-            write!(
-                w,
-                "{vis}const {name}: {typ}",
-                vis = visibility_print_with_space(it.visibility(tcx), it.item_id, cx),
-                name = it.name.unwrap(),
-                typ = c.type_.print(cx),
-            );
+        write!(
+            w,
+            "{vis}const {name}: {typ}",
+            vis = visibility_print_with_space(it.visibility(tcx), it.item_id, cx),
+            name = it.name.unwrap(),
+            typ = c.type_.print(cx),
+        );
 
-            // FIXME: The code below now prints
-            //            ` = _; // 100i32`
-            //        if the expression is
-            //            `50 + 50`
-            //        which looks just wrong.
-            //        Should we print
-            //            ` = 100i32;`
-            //        instead?
-
-            let value = c.value(tcx);
-            let is_literal = c.is_literal(tcx);
-            let expr = c.expr(tcx);
-            if value.is_some() || is_literal {
-                write!(w, " = {expr};", expr = Escape(&expr));
-            } else {
-                w.write_str(";");
-            }
+        // FIXME: The code below now prints
+        //            ` = _; // 100i32`
+        //        if the expression is
+        //            `50 + 50`
+        //        which looks just wrong.
+        //        Should we print
+        //            ` = 100i32;`
+        //        instead?
+
+        let value = c.value(tcx);
+        let is_literal = c.is_literal(tcx);
+        let expr = c.expr(tcx);
+        if value.is_some() || is_literal {
+            write!(w, " = {expr};", expr = Escape(&expr));
+        } else {
+            w.write_str(";");
+        }
 
-            if !is_literal {
-                if let Some(value) = &value {
-                    let value_lowercase = value.to_lowercase();
-                    let expr_lowercase = expr.to_lowercase();
+        if !is_literal {
+            if let Some(value) = &value {
+                let value_lowercase = value.to_lowercase();
+                let expr_lowercase = expr.to_lowercase();
 
-                    if value_lowercase != expr_lowercase
-                        && value_lowercase.trim_end_matches("i32") != expr_lowercase
-                    {
-                        write!(w, " // {value}", value = Escape(value));
-                    }
+                if value_lowercase != expr_lowercase
+                    && value_lowercase.trim_end_matches("i32") != expr_lowercase
+                {
+                    write!(w, " // {value}", value = Escape(value));
                 }
             }
-        });
+        }
     });
 
     document(w, cx, it, None, HeadingOffset::H2)
 }
 
 fn item_struct(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean::Struct) {
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_code(w, it);
-            render_struct(w, it, Some(&s.generics), s.ctor_kind, &s.fields, "", true, cx);
-        });
+    wrap_item(w, |w| {
+        render_attributes_in_code(w, it);
+        render_struct(w, it, Some(&s.generics), s.ctor_kind, &s.fields, "", true, cx);
     });
 
     document(w, cx, it, None, HeadingOffset::H2);
@@ -1486,11 +1449,9 @@ fn item_struct(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean
                     w,
                     "<span id=\"{id}\" class=\"{item_type} small-section-header\">\
                          <a href=\"#{id}\" class=\"anchor field\">§</a>\
-                         <code>{name}: {ty}</code>\
+                         <code>{field_name}: {ty}</code>\
                      </span>",
                     item_type = ItemType::StructField,
-                    id = id,
-                    name = field_name,
                     ty = ty.print(cx)
                 );
                 document(w, cx, field, Some(it), HeadingOffset::H3);
@@ -1503,34 +1464,30 @@ fn item_struct(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean
 }
 
 fn item_static(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean::Static) {
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            render_attributes_in_code(w, it);
-            write!(
-                w,
-                "{vis}static {mutability}{name}: {typ}",
-                vis = visibility_print_with_space(it.visibility(cx.tcx()), it.item_id, cx),
-                mutability = s.mutability.print_with_space(),
-                name = it.name.unwrap(),
-                typ = s.type_.print(cx)
-            );
-        });
+    wrap_item(w, |w| {
+        render_attributes_in_code(w, it);
+        write!(
+            w,
+            "{vis}static {mutability}{name}: {typ}",
+            vis = visibility_print_with_space(it.visibility(cx.tcx()), it.item_id, cx),
+            mutability = s.mutability.print_with_space(),
+            name = it.name.unwrap(),
+            typ = s.type_.print(cx)
+        );
     });
     document(w, cx, it, None, HeadingOffset::H2)
 }
 
 fn item_foreign_type(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item) {
-    wrap_into_item_decl(w, |w| {
-        wrap_item(w, |w| {
-            w.write_str("extern {\n");
-            render_attributes_in_code(w, it);
-            write!(
-                w,
-                "    {}type {};\n}}",
-                visibility_print_with_space(it.visibility(cx.tcx()), it.item_id, cx),
-                it.name.unwrap(),
-            );
-        });
+    wrap_item(w, |w| {
+        w.write_str("extern {\n");
+        render_attributes_in_code(w, it);
+        write!(
+            w,
+            "    {}type {};\n}}",
+            visibility_print_with_space(it.visibility(cx.tcx()), it.item_id, cx),
+            it.name.unwrap(),
+        );
     });
 
     document(w, cx, it, None, HeadingOffset::H2);
@@ -1609,20 +1566,11 @@ fn bounds(t_bounds: &[clean::GenericBound], trait_alias: bool, cx: &Context<'_>)
     bounds
 }
 
-fn wrap_into_item_decl<F>(w: &mut Buffer, f: F)
-where
-    F: FnOnce(&mut Buffer),
-{
-    w.write_str("<div class=\"item-decl\">");
-    f(w);
-    w.write_str("</div>")
-}
-
 fn wrap_item<F>(w: &mut Buffer, f: F)
 where
     F: FnOnce(&mut Buffer),
 {
-    w.write_str(r#"<pre class="rust"><code>"#);
+    w.write_str(r#"<pre class="rust item-decl"><code>"#);
     f(w);
     w.write_str("</code></pre>");
 }
@@ -1677,7 +1625,6 @@ fn render_union(
     it: &clean::Item,
     g: Option<&clean::Generics>,
     fields: &[clean::Item],
-    tab: &str,
     cx: &Context<'_>,
 ) {
     let tcx = cx.tcx();
@@ -1700,7 +1647,7 @@ fn render_union(
         w.write_str(" ");
     }
 
-    write!(w, "{{\n{}", tab);
+    write!(w, "{{\n");
     let count_fields =
         fields.iter().filter(|f| matches!(*f.kind, clean::StructFieldItem(..))).count();
     let toggle = should_hide_fields(count_fields);
@@ -1712,17 +1659,16 @@ fn render_union(
         if let clean::StructFieldItem(ref ty) = *field.kind {
             write!(
                 w,
-                "    {}{}: {},\n{}",
+                "    {}{}: {},\n",
                 visibility_print_with_space(field.visibility(tcx), field.item_id, cx),
                 field.name.unwrap(),
-                ty.print(cx),
-                tab
+                ty.print(cx)
             );
         }
     }
 
     if it.has_stripped_entries().unwrap() {
-        write!(w, "    /* private fields */\n{}", tab);
+        write!(w, "    /* private fields */\n");
     }
     if toggle {
         toggle_close(w);
@@ -1887,12 +1833,12 @@ fn document_non_exhaustive(w: &mut Buffer, item: &clean::Item) {
 }
 
 fn document_type_layout(w: &mut Buffer, cx: &Context<'_>, ty_def_id: DefId) {
-    fn write_size_of_layout(w: &mut Buffer, layout: &LayoutS<VariantIdx>, tag_size: u64) {
+    fn write_size_of_layout(w: &mut Buffer, layout: &LayoutS, tag_size: u64) {
         if layout.abi.is_unsized() {
             write!(w, "(unsized)");
         } else {
-            let bytes = layout.size.bytes() - tag_size;
-            write!(w, "{size} byte{pl}", size = bytes, pl = if bytes == 1 { "" } else { "s" },);
+            let size = layout.size.bytes() - tag_size;
+            write!(w, "{size} byte{pl}", pl = if size == 1 { "" } else { "s" },);
         }
     }
 
@@ -1909,7 +1855,7 @@ fn document_type_layout(w: &mut Buffer, cx: &Context<'_>, ty_def_id: DefId) {
 
     let tcx = cx.tcx();
     let param_env = tcx.param_env(ty_def_id);
-    let ty = tcx.type_of(ty_def_id);
+    let ty = tcx.type_of(ty_def_id).subst_identity();
     match tcx.layout_of(param_env.and(ty)) {
         Ok(ty_layout) => {
             writeln!(
@@ -1947,7 +1893,7 @@ fn document_type_layout(w: &mut Buffer, cx: &Context<'_>, ty_def_id: DefId) {
 
                     for (index, layout) in variants.iter_enumerated() {
                         let name = adt.variant(index).name;
-                        write!(w, "<li><code>{name}</code>: ", name = name);
+                        write!(w, "<li><code>{name}</code>: ");
                         write_size_of_layout(w, layout, tag_size);
                         writeln!(w, "</li>");
                     }
diff --git a/src/librustdoc/html/render/search_index.rs b/src/librustdoc/html/render/search_index.rs
index 5b0caac09..090ea2cb1 100644
--- a/src/librustdoc/html/render/search_index.rs
+++ b/src/librustdoc/html/render/search_index.rs
@@ -236,7 +236,16 @@ pub(crate) fn build_index<'tcx>(
             crate_data.serialize_field("doc", &self.doc)?;
             crate_data.serialize_field(
                 "t",
-                &self.items.iter().map(|item| &item.ty).collect::<Vec<_>>(),
+                &self
+                    .items
+                    .iter()
+                    .map(|item| {
+                        let n = item.ty as u8;
+                        let c = char::try_from(n + b'A').expect("item types must fit in ASCII");
+                        assert!(c <= 'z', "item types must fit within ASCII printables");
+                        c
+                    })
+                    .collect::<String>(),
             )?;
             crate_data.serialize_field(
                 "n",
diff --git a/src/librustdoc/html/render/write_shared.rs b/src/librustdoc/html/render/write_shared.rs
index bc8badad3..54749e9a3 100644
--- a/src/librustdoc/html/render/write_shared.rs
+++ b/src/librustdoc/html/render/write_shared.rs
@@ -11,7 +11,7 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use serde::ser::SerializeSeq;
 use serde::{Serialize, Serializer};
 
-use super::{collect_paths_for_type, ensure_trailing_slash, Context, BASIC_KEYWORDS};
+use super::{collect_paths_for_type, ensure_trailing_slash, Context};
 use crate::clean::Crate;
 use crate::config::{EmitType, RenderOptions};
 use crate::docfs::PathError;
@@ -138,7 +138,7 @@ pub(super) fn write_shared(
         Ok((ret, krates))
     }
 
-    /// Read a file and return all lines that match the <code>"{crate}":{data},\</code> format,
+    /// Read a file and return all lines that match the <code>"{crate}":{data},\ </code> format,
     /// and return a tuple `(Vec<DataString>, Vec<CrateNameString>)`.
     ///
     /// This forms the payload of files that look like this:
@@ -340,7 +340,6 @@ if (typeof exports !== 'undefined') {exports.searchIndex = searchIndex};
                 root_path: "./",
                 static_root_path: shared.static_root_path.as_deref(),
                 description: "List of crates",
-                keywords: BASIC_KEYWORDS,
                 resource_suffix: &shared.resource_suffix,
             };
 
diff --git a/src/librustdoc/html/sources.rs b/src/librustdoc/html/sources.rs
index 799c497d1..2c90bf4fa 100644
--- a/src/librustdoc/html/sources.rs
+++ b/src/librustdoc/html/sources.rs
@@ -4,7 +4,7 @@ use crate::error::Error;
 use crate::html::format::Buffer;
 use crate::html::highlight;
 use crate::html::layout;
-use crate::html::render::{Context, BASIC_KEYWORDS};
+use crate::html::render::Context;
 use crate::visit::DocVisitor;
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
@@ -228,7 +228,6 @@ impl SourceCollector<'_, '_> {
             root_path: &root_path,
             static_root_path: shared.static_root_path.as_deref(),
             description: &desc,
-            keywords: BASIC_KEYWORDS,
             resource_suffix: &shared.resource_suffix,
         };
         let v = layout::render(
diff --git a/src/librustdoc/html/static/.eslintrc.js b/src/librustdoc/html/static/.eslintrc.js
index fcd925bb3..1a34530c2 100644
--- a/src/librustdoc/html/static/.eslintrc.js
+++ b/src/librustdoc/html/static/.eslintrc.js
@@ -90,7 +90,6 @@ module.exports = {
         "no-return-assign": "error",
         "no-script-url": "error",
         "no-sequences": "error",
-        "no-throw-literal": "error",
         "no-div-regex": "error",
     }
 };
diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index a93f60da2..95528e70e 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -1,3 +1,11 @@
+/* When static files are updated, their suffixes need to be updated.
+	1. In the top directory run:
+		./x.py doc --stage 1 library/core
+	2. Find the directory containing files named with updated suffixes:
+		find build -path '*'/stage1-std/'*'/static.files
+	3. Copy the filenames with updated suffixes from the directory.
+*/
+
 /* See FiraSans-LICENSE.txt for the Fira Sans license. */
 @font-face {
 	font-family: 'Fira Sans';
@@ -22,7 +30,7 @@
 	font-style: normal;
 	font-weight: 400;
 	src: local('Source Serif 4'),
-		url("SourceSerif4-Regular-1f7d512b176f0f72.ttf.woff2") format("woff2");
+		url("SourceSerif4-Regular-46f98efaafac5295.ttf.woff2") format("woff2");
 	font-display: swap;
 }
 @font-face {
@@ -30,7 +38,7 @@
 	font-style: italic;
 	font-weight: 400;
 	src: local('Source Serif 4 Italic'),
-		url("SourceSerif4-It-d034fe4ef9d0fa00.ttf.woff2") format("woff2");
+		url("SourceSerif4-It-acdfaf1a8af734b1.ttf.woff2") format("woff2");
 	font-display: swap;
 }
 @font-face {
@@ -38,7 +46,7 @@
 	font-style: normal;
 	font-weight: 700;
 	src: local('Source Serif 4 Bold'),
-		url("SourceSerif4-Bold-124a1ca42af929b6.ttf.woff2") format("woff2");
+		url("SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2") format("woff2");
 	font-display: swap;
 }
 
@@ -166,6 +174,14 @@ h1, h2, h3, h4 {
 .top-doc .docblock > h4 {
 	border-bottom: 1px solid var(--headings-border-bottom-color);
 }
+/* while line-height 1.5 is required for any "block of text",
+	which WCAG defines as more than one sentence, it looks weird for
+	very large main headers */
+h1, h2 {
+	line-height: 1.25;
+	padding-top: 3px;
+	padding-bottom: 9px;
+}
 h3.code-header {
 	font-size: 1.125rem; /* 18px */
 }
@@ -176,6 +192,7 @@ h4.code-header {
 	font-weight: 600;
 	margin: 0;
 	padding: 0;
+	white-space: pre-wrap;
 }
 
 #crate-search,
@@ -184,7 +201,7 @@ h1, h2, h3, h4, h5, h6,
 .mobile-topbar,
 .search-input,
 .search-results .result-name,
-.item-left > a,
+.item-name > a,
 .out-of-band,
 span.since,
 a.srclink,
@@ -335,7 +352,7 @@ pre {
 	padding: 14px;
 	line-height: 1.5; /* https://github.com/rust-lang/rust/issues/105906 */
 }
-.item-decl pre {
+pre.item-decl {
 	overflow-x: auto;
 }
 /* This rule allows to have scrolling on the X axis. */
@@ -533,7 +550,7 @@ ul.block, .block li {
 .rustdoc .example-wrap > pre {
 	margin: 0;
 	flex-grow: 1;
-	overflow-x: auto;
+	overflow: auto hidden;
 }
 
 .rustdoc .example-wrap > pre.example-line-numbers,
@@ -634,6 +651,7 @@ pre, .rustdoc.source .example-wrap {
 .fn .where,
 .where.fmt-newline {
 	display: block;
+	white-space: pre-wrap;
 	font-size: 0.875rem;
 }
 
@@ -697,8 +715,8 @@ h2.small-section-header > .anchor {
 .main-heading a:hover,
 .example-wrap > pre.rust a:hover,
 .all-items a:hover,
-.docblock a:not(.test-arrow):not(.scrape-help):hover,
-.docblock-short a:not(.test-arrow):not(.scrape-help):hover,
+.docblock a:not(.test-arrow):not(.scrape-help):not(.tooltip):hover,
+.docblock-short a:not(.test-arrow):not(.scrape-help):not(.tooltip):hover,
 .item-info a {
 	text-decoration: underline;
 }
@@ -732,14 +750,16 @@ table,
 
 .item-table {
 	display: table;
+	padding: 0;
+	margin: 0;
 }
-.item-row {
+.item-table > li {
 	display: table-row;
 }
-.item-left, .item-right {
+.item-table > li > div {
 	display: table-cell;
 }
-.item-left {
+.item-table > li > .item-name {
 	padding-right: 1.25rem;
 }
 
@@ -806,8 +826,11 @@ so that we can apply CSS-filters to change the arrow color in themes */
 	background-repeat: no-repeat;
 	background-size: 20px;
 	background-position: calc(100% - 2px) 56%;
-	/* image is black color */
-	background-image: url("down-arrow-927217e04c7463ac.svg");
+	/* down arrow (image is black color) */
+	background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" \
+	width="128" height="128" viewBox="-30 -20 176 176"><path d="M111,40.5L64,87.499L17,40.5" \
+	fill="none" stroke="black" strike-linecap="square" stroke-miterlimit="10" stroke-width="12"/> \
+	</svg>');
 	/* changes the arrow image color */
 	filter: var(--crate-search-div-filter);
 }
@@ -941,7 +964,7 @@ so that we can apply CSS-filters to change the arrow color in themes */
 	padding: 3px;
 	margin-bottom: 5px;
 }
-.item-left .stab {
+.item-name .stab {
 	margin-left: 0.3125em;
 }
 .stab {
@@ -977,11 +1000,6 @@ so that we can apply CSS-filters to change the arrow color in themes */
 		0 -1px 0 black;
 }
 
-.module-item.unstable,
-.import-item.unstable {
-	opacity: 0.65;
-}
-
 .since {
 	font-weight: normal;
 	font-size: initial;
@@ -1093,44 +1111,8 @@ pre.rust .doccomment {
 	display: block;
 	left: -25px;
 	top: 5px;
-}
-
-.example-wrap .tooltip:hover::after {
-	padding: 5px 3px 3px 3px;
-	border-radius: 6px;
-	margin-left: 5px;
-	font-size: 1rem;
-	border: 1px solid var(--border-color);
-	position: absolute;
-	width: max-content;
-	top: -2px;
-	z-index: 1;
-	background-color: var(--tooltip-background-color);
-	color: var(--tooltip-color);
-}
-
-.example-wrap .tooltip:hover::before {
-	content: " ";
-	position: absolute;
-	top: 50%;
-	left: 16px;
-	margin-top: -5px;
-	z-index: 1;
-	border: 5px solid transparent;
-	border-right-color: var(--tooltip-background-color);
-}
-
-.example-wrap.ignore .tooltip:hover::after {
-	content: "This example is not tested";
-}
-.example-wrap.compile_fail .tooltip:hover::after {
-	content: "This example deliberately fails to compile";
-}
-.example-wrap.should_panic .tooltip:hover::after {
-	content: "This example panics";
-}
-.example-wrap.edition .tooltip:hover::after {
-	content: "This code runs with edition " attr(data-edition);
+	margin: 0;
+	line-height: 1;
 }
 
 .example-wrap.compile_fail .tooltip,
@@ -1168,6 +1150,7 @@ a.test-arrow:hover {
 .item-spacer {
 	width: 100%;
 	height: 12px;
+	display: block;
 }
 
 .out-of-band > span.since {
@@ -1196,7 +1179,7 @@ a.test-arrow:hover {
 	border-right: 3px solid var(--target-border-color);
 }
 
-.notable-traits {
+.code-header a.tooltip {
 	color: inherit;
 	margin-right: 15px;
 	position: relative;
@@ -1205,7 +1188,7 @@ a.test-arrow:hover {
 /* placeholder thunk so that the mouse can easily travel from "(i)" to popover
 	the resulting "hover tunnel" is a stepped triangle, approximating
 	https://bjk5.com/post/44698559168/breaking-down-amazons-mega-dropdown */
-.notable-traits:hover::after {
+a.tooltip:hover::after {
 	position: absolute;
 	top: calc(100% - 10px);
 	left: -15px;
@@ -1214,11 +1197,11 @@ a.test-arrow:hover {
 	content: "\00a0";
 }
 
-.notable .content {
+.popover.tooltip .content {
 	margin: 0.25em 0.5em;
 }
 
-.notable .content pre, .notable .content code {
+.popover.tooltip .content pre, .popover.tooltip .content code {
 	background: transparent;
 	margin: 0;
 	padding: 0;
@@ -1226,7 +1209,7 @@ a.test-arrow:hover {
 	white-space: pre-wrap;
 }
 
-.notable .content > h3:first-child {
+.popover.tooltip .content > h3:first-child {
 	margin: 0 0 5px 0;
 }
 
@@ -1263,12 +1246,25 @@ a.test-arrow:hover {
 	line-height: 1.5;
 	color: inherit;
 }
+#search-tabs button:not(.selected) {
+	background-color: var(--search-tab-button-not-selected-background);
+	border-top-color: var(--search-tab-button-not-selected-border-top-color);
+}
+#search-tabs button:hover, #search-tabs button.selected {
+	background-color: var(--search-tab-button-selected-background);
+	border-top-color: var(--search-tab-button-selected-border-top-color);
+}
 
 #search-tabs .count {
 	font-size: 1rem;
 	color: var(--search-tab-title-count-color);
 }
 
+#search .error code {
+	border-radius: 3px;
+	background-color: var(--search-error-code-background-color);
+}
+
 #src-sidebar-toggle {
 	position: sticky;
 	top: 0;
@@ -1433,7 +1429,10 @@ details.toggle > summary.hideme > span {
 }
 
 details.toggle > summary::before {
-	background: url("toggle-plus-1092eb4930d581b0.svg") no-repeat top left;
+	/* toggle plus */
+	background: url('data:image/svg+xml,<svg width="17" height="17" \
+shape-rendering="crispEdges" stroke="black" fill="none" xmlns="http://www.w3.org/2000/svg"><path \
+d="M5 2.5H2.5v12H5m7-12h2.5v12H12M5 8.5h7M8.5 12V8.625v0V5"/></svg>') no-repeat top left;
 	content: "";
 	cursor: pointer;
 	width: 16px;
@@ -1511,7 +1510,10 @@ details.toggle[open] > summary.hideme > span {
 }
 
 details.toggle[open] > summary::before {
-	background: url("toggle-minus-31bbd6e4c77f5c96.svg") no-repeat top left;
+	/* toggle minus */
+	background: url('data:image/svg+xml,<svg width="17" height="17" \
+shape-rendering="crispEdges" stroke="black" fill="none" xmlns="http://www.w3.org/2000/svg"><path \
+d="M5 2.5H2.5v12H5m7-12h2.5v12H12M5 8.5h7"/></svg>') no-repeat top left;
 }
 
 details.toggle[open] > summary::after {
@@ -1700,7 +1702,7 @@ in storage.js
 	}
 
 	/* Display an alternating layout on tablets and phones */
-	.item-table, .item-row, .item-left, .item-right,
+	.item-table, .item-row, .item-table > li, .item-table > li > div,
 	.search-results > a, .search-results > a > div {
 		display: block;
 	}
@@ -1709,7 +1711,7 @@ in storage.js
 	.search-results > a {
 		padding: 5px 0px;
 	}
-	.search-results > a > div.desc, .item-right {
+	.search-results > a > div.desc, .item-table > li > div.desc {
 		padding-left: 2em;
 	}
 
@@ -1897,19 +1899,25 @@ in storage.js
 	right: 0.25em;
 }
 
-.scraped-example:not(.expanded) .code-wrapper:before,
-.scraped-example:not(.expanded) .code-wrapper:after {
+.scraped-example:not(.expanded) .code-wrapper::before,
+.scraped-example:not(.expanded) .code-wrapper::after {
 	content: " ";
 	width: 100%;
 	height: 5px;
 	position: absolute;
 	z-index: 1;
 }
-.scraped-example:not(.expanded) .code-wrapper:before {
+.scraped-example:not(.expanded) .code-wrapper::before {
 	top: 0;
+	background: linear-gradient(to bottom,
+		var(--scrape-example-code-wrapper-background-start),
+		var(--scrape-example-code-wrapper-background-end));
 }
-.scraped-example:not(.expanded) .code-wrapper:after {
+.scraped-example:not(.expanded) .code-wrapper::after {
 	bottom: 0;
+	background: linear-gradient(to top,
+		var(--scrape-example-code-wrapper-background-start),
+		var(--scrape-example-code-wrapper-background-end));
 }
 
 .scraped-example .code-wrapper .example-wrap {
diff --git a/src/librustdoc/html/static/css/settings.css b/src/librustdoc/html/static/css/settings.css
index 4e9803fe2..920f45c4b 100644
--- a/src/librustdoc/html/static/css/settings.css
+++ b/src/librustdoc/html/static/css/settings.css
@@ -3,8 +3,7 @@
 	position: relative;
 }
 
-.setting-line .radio-line input,
-.setting-line .settings-toggle input {
+.setting-radio input, .setting-check input {
 	margin-right: 0.3em;
 	height: 1.2rem;
 	width: 1.2rem;
@@ -14,21 +13,20 @@
 	-webkit-appearance: none;
 	cursor: pointer;
 }
-.setting-line .radio-line input {
+.setting-radio input {
 	border-radius: 50%;
 }
-.setting-line .settings-toggle input:checked {
+.setting-check input:checked {
 	content: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40">\
 		<path d="M7,25L17,32L33,12" fill="none" stroke="black" stroke-width="5"/>\
 		<path d="M7,23L17,30L33,10" fill="none" stroke="white" stroke-width="5"/></svg>');
 }
 
-.setting-line .radio-line input + span,
-.setting-line .settings-toggle span {
+.setting-radio span, .setting-check span {
 	padding-bottom: 1px;
 }
 
-.radio-line .choice {
+.setting-radio {
 	margin-top: 0.1em;
 	margin-bottom: 0.1em;
 	min-width: 3.8em;
@@ -37,36 +35,32 @@
 	align-items: center;
 	cursor: pointer;
 }
-.radio-line .choice + .choice {
+.setting-radio + .setting-radio {
 	margin-left: 0.5em;
 }
 
-.settings-toggle {
-	position: relative;
-	width: 100%;
+.setting-check {
 	margin-right: 20px;
 	display: flex;
 	align-items: center;
 	cursor: pointer;
 }
 
-.setting-line .radio-line input:checked {
+.setting-radio input:checked {
 	box-shadow: inset 0 0 0 3px var(--main-background-color);
 	background-color: var(--settings-input-color);
 }
-.setting-line .settings-toggle input:checked {
+.setting-check input:checked {
 	background-color: var(--settings-input-color);
 }
-.setting-line .radio-line input:focus,
-.setting-line .settings-toggle input:focus {
+.setting-radio input:focus, .setting-check input:focus {
 	box-shadow: 0 0 1px 1px var(--settings-input-color);
 }
 /* In here we combine both `:focus` and `:checked` properties. */
-.setting-line .radio-line input:checked:focus {
+.setting-radio input:checked:focus {
 	box-shadow: inset 0 0 0 3px var(--main-background-color),
 		0 0 2px 2px var(--settings-input-color);
 }
-.setting-line .radio-line input:hover,
-.setting-line .settings-toggle input:hover {
+.setting-radio input:hover, .setting-check input:hover {
 	border-color: var(--settings-input-color) !important;
 }
diff --git a/src/librustdoc/html/static/css/themes/ayu.css b/src/librustdoc/html/static/css/themes/ayu.css
index 979e7e0f9..90cf689ad 100644
--- a/src/librustdoc/html/static/css/themes/ayu.css
+++ b/src/librustdoc/html/static/css/themes/ayu.css
@@ -43,9 +43,14 @@ Original by Dempfi (https://github.com/dempfi/ayu)
 	--search-result-link-focus-background-color: #3c3c3c;
 	--search-result-border-color: #aaa3;
 	--search-color: #fff;
+	--search-error-code-background-color: #4f4c4c;
 	--search-results-alias-color: #c5c5c5;
 	--search-results-grey-color: #999;
 	--search-tab-title-count-color: #888;
+	--search-tab-button-not-selected-border-top-color: none;
+	--search-tab-button-not-selected-background: transparent !important;
+	--search-tab-button-selected-border-top-color: none;
+	--search-tab-button-selected-background: #141920 !important;
 	--stab-background-color: #314559;
 	--stab-code-color: #e6e1cf;
 	--code-highlight-kw-color: #ff7733;
@@ -70,8 +75,6 @@ Original by Dempfi (https://github.com/dempfi/ayu)
 	--test-arrow-hover-background-color: rgba(57, 175, 215, 0.368);
 	--target-background-color: rgba(255, 236, 164, 0.06);
 	--target-border-color: rgba(255, 180, 76, 0.85);
-	--tooltip-background-color: #314559;
-	--tooltip-color: #c5c5c5;
 	--kbd-color: #c5c5c5;
 	--kbd-background: #314559;
 	--kbd-box-shadow-color: #5c6773;
@@ -97,12 +100,13 @@ Original by Dempfi (https://github.com/dempfi/ayu)
 	--scrape-example-help-color: #eee;
 	--scrape-example-help-hover-border-color: #fff;
 	--scrape-example-help-hover-color: #fff;
+	--scrape-example-code-wrapper-background-start: rgba(15, 20, 25, 1);
+	--scrape-example-code-wrapper-background-end: rgba(15, 20, 25, 0);
 }
 
-h1, h2, h3, h4 {
-	color: white;
-}
-h1 a {
+h1, h2, h3, h4,
+h1 a, .sidebar h2 a, .sidebar h3 a,
+#source-sidebar > .title {
 	color: #fff;
 }
 h4 {
@@ -112,24 +116,22 @@ h4 {
 .docblock code {
 	color: #ffb454;
 }
-.code-header {
-	color: #e6e1cf;
-}
-.docblock pre > code, pre > code {
-	color: #e6e1cf;
-}
-.item-info code {
-	color: #e6e1cf;
-}
 .docblock a > code {
 	color: #39AFD7 !important;
 }
-pre, .rustdoc.source .example-wrap {
+.code-header,
+.docblock pre > code,
+pre, pre > code,
+.item-info code,
+.rustdoc.source .example-wrap {
 	color: #e6e1cf;
 }
 
 .sidebar .current,
-.sidebar a:hover {
+.sidebar a:hover,
+#source-sidebar div.files > a:hover, details.dir-entry summary:hover,
+#source-sidebar div.files > a:focus, details.dir-entry summary:focus,
+#source-sidebar div.files > a.selected {
 	color: #ffb44c;
 }
 
@@ -143,15 +145,12 @@ pre, .rustdoc.source .example-wrap {
 	border-right: 1px solid #ffb44c;
 }
 
-.search-results a:hover {
-	color: #fff !important;
-	background-color: #3c3c3c;
-}
-
+.search-results a:hover,
 .search-results a:focus {
 	color: #fff !important;
 	background-color: #3c3c3c;
 }
+
 .search-results a {
 	color: #0096cf;
 }
@@ -159,54 +158,22 @@ pre, .rustdoc.source .example-wrap {
 	color: #c5c5c5;
 }
 
-.sidebar h2 a,
-.sidebar h3 a {
-	color: white;
-}
-
 .result-name .primitive > i, .result-name .keyword > i {
 	color: #788797;
 }
 
 #search-tabs > button.selected {
-	background-color: #141920 !important;
 	border-bottom: 1px solid #ffb44c !important;
 	border-top: none;
 }
-
 #search-tabs > button:not(.selected) {
-	background-color: transparent !important;
 	border: none;
+	background-color: transparent !important;
 }
-
 #search-tabs > button:hover {
 	border-bottom: 1px solid rgba(242, 151, 24, 0.3);
 }
 
-/* rules that this theme does not need to set, here to satisfy the rule checker */
-/* note that a lot of these are partially set in some way (meaning they are set
-individually rather than as a group) */
-/* FIXME: these rules should be at the bottom of the file but currently must be
-above the `@media (max-width: 700px)` rules due to a bug in the css checker */
-/* see https://github.com/rust-lang/rust/pull/71237#issuecomment-618170143 */
-#search-tabs > button:hover, #search-tabs > button.selected {}
-
 #settings-menu > a img {
 	filter: invert(100);
 }
-
-#source-sidebar > .title {
-	color: #fff;
-}
-#source-sidebar div.files > a:hover, details.dir-entry summary:hover,
-#source-sidebar div.files > a:focus, details.dir-entry summary:focus,
-#source-sidebar div.files > a.selected {
-	color: #ffb44c;
-}
-
-.scraped-example:not(.expanded) .code-wrapper::before {
-	background: linear-gradient(to bottom, rgba(15, 20, 25, 1), rgba(15, 20, 25, 0));
-}
-.scraped-example:not(.expanded) .code-wrapper::after {
-	background: linear-gradient(to top, rgba(15, 20, 25, 1), rgba(15, 20, 25, 0));
-}
diff --git a/src/librustdoc/html/static/css/themes/dark.css b/src/librustdoc/html/static/css/themes/dark.css
index fb15863b0..e8cd06931 100644
--- a/src/librustdoc/html/static/css/themes/dark.css
+++ b/src/librustdoc/html/static/css/themes/dark.css
@@ -38,9 +38,14 @@
 	--search-result-link-focus-background-color: #616161;
 	--search-result-border-color: #aaa3;
 	--search-color: #111;
+	--search-error-code-background-color: #484848;
 	--search-results-alias-color: #fff;
 	--search-results-grey-color: #ccc;
 	--search-tab-title-count-color: #888;
+	--search-tab-button-not-selected-border-top-color: #252525;
+	--search-tab-button-not-selected-background: #252525;
+	--search-tab-button-selected-border-top-color: #0089ff;
+	--search-tab-button-selected-background: #353535;
 	--stab-background-color: #314559;
 	--stab-code-color: #e6e1cf;
 	--code-highlight-kw-color: #ab8ac1;
@@ -65,8 +70,6 @@
 	--test-arrow-hover-background-color: #4e8bca;
 	--target-background-color: #494a3d;
 	--target-border-color: #bb7410;
-	--tooltip-background-color: #000;
-	--tooltip-color: #fff;
 	--kbd-color: #000;
 	--kbd-background: #fafbfc;
 	--kbd-box-shadow-color: #c6cbd1;
@@ -92,21 +95,6 @@
 	--scrape-example-help-color: #eee;
 	--scrape-example-help-hover-border-color: #fff;
 	--scrape-example-help-hover-color: #fff;
-}
-
-#search-tabs > button:not(.selected) {
-	background-color: #252525;
-	border-top-color: #252525;
-}
-
-#search-tabs > button:hover, #search-tabs > button.selected {
-	border-top-color: #0089ff;
-	background-color: #353535;
-}
-
-.scraped-example:not(.expanded) .code-wrapper::before {
-	background: linear-gradient(to bottom, rgba(53, 53, 53, 1), rgba(53, 53, 53, 0));
-}
-.scraped-example:not(.expanded) .code-wrapper::after {
-	background: linear-gradient(to top, rgba(53, 53, 53, 1), rgba(53, 53, 53, 0));
+	--scrape-example-code-wrapper-background-start: rgba(53, 53, 53, 1);
+	--scrape-example-code-wrapper-background-end: rgba(53, 53, 53, 0);
 }
diff --git a/src/librustdoc/html/static/css/themes/light.css b/src/librustdoc/html/static/css/themes/light.css
index 053fa78d1..5e3f14e48 100644
--- a/src/librustdoc/html/static/css/themes/light.css
+++ b/src/librustdoc/html/static/css/themes/light.css
@@ -38,9 +38,14 @@
 	--search-result-link-focus-background-color: #ccc;
 	--search-result-border-color: #aaa3;
 	--search-color: #000;
+	--search-error-code-background-color: #d0cccc;
 	--search-results-alias-color: #000;
 	--search-results-grey-color: #999;
 	--search-tab-title-count-color: #888;
+	--search-tab-button-not-selected-border-top-color: #e6e6e6;
+	--search-tab-button-not-selected-background: #e6e6e6;
+	--search-tab-button-selected-border-top-color: #0089ff;
+	--search-tab-button-selected-background: #ffffff;
 	--stab-background-color: #fff5d6;
 	--stab-code-color: #000;
 	--code-highlight-kw-color: #8959a8;
@@ -65,8 +70,6 @@
 	--test-arrow-hover-background-color: #4e8bca;
 	--target-background-color: #fdffd3;
 	--target-border-color: #ad7c37;
-	--tooltip-background-color: #000;
-	--tooltip-color: #fff;
 	--kbd-color: #000;
 	--kbd-background: #fafbfc;
 	--kbd-box-shadow-color: #c6cbd1;
@@ -89,21 +92,6 @@
 	--scrape-example-help-color: #333;
 	--scrape-example-help-hover-border-color: #000;
 	--scrape-example-help-hover-color: #000;
-}
-
-#search-tabs > button:not(.selected) {
-	background-color: #e6e6e6;
-	border-top-color: #e6e6e6;
-}
-
-#search-tabs > button:hover, #search-tabs > button.selected {
-	background-color: #ffffff;
-	border-top-color: #0089ff;
-}
-
-.scraped-example:not(.expanded) .code-wrapper::before {
-	background: linear-gradient(to bottom, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0));
-}
-.scraped-example:not(.expanded) .code-wrapper::after {
-	background: linear-gradient(to top, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0));
+	--scrape-example-code-wrapper-background-start: rgba(255, 255, 255, 1);
+	--scrape-example-code-wrapper-background-end: rgba(255, 255, 255, 0);
 }
diff --git a/src/librustdoc/html/static/fonts/SourceSerif4-Bold.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceSerif4-Bold.ttf.woff2
index db57d2145..181a07f63 100644
--- a/src/librustdoc/html/static/fonts/SourceSerif4-Bold.ttf.woff2
+++ b/src/librustdoc/html/static/fonts/SourceSerif4-Bold.ttf.woff2
diff --git a/src/librustdoc/html/static/fonts/SourceSerif4-It.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceSerif4-It.ttf.woff2
index 1cbc021a3..2ae08a7be 100644
--- a/src/librustdoc/html/static/fonts/SourceSerif4-It.ttf.woff2
+++ b/src/librustdoc/html/static/fonts/SourceSerif4-It.ttf.woff2
diff --git a/src/librustdoc/html/static/fonts/SourceSerif4-LICENSE.md b/src/librustdoc/html/static/fonts/SourceSerif4-LICENSE.md
index 68ea18924..5871e1f3d 100644
--- a/src/librustdoc/html/static/fonts/SourceSerif4-LICENSE.md
+++ b/src/librustdoc/html/static/fonts/SourceSerif4-LICENSE.md
@@ -1,4 +1,4 @@
-Copyright 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
+Copyright 2014 - 2023 Adobe (http://www.adobe.com/), with Reserved Font Name ‘Source’. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
 
 This Font Software is licensed under the SIL Open Font License, Version 1.1.
 
diff --git a/src/librustdoc/html/static/fonts/SourceSerif4-Regular.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceSerif4-Regular.ttf.woff2
index 2db73fe2b..0263fc304 100644
--- a/src/librustdoc/html/static/fonts/SourceSerif4-Regular.ttf.woff2
+++ b/src/librustdoc/html/static/fonts/SourceSerif4-Regular.ttf.woff2
diff --git a/src/librustdoc/html/static/images/down-arrow.svg b/src/librustdoc/html/static/images/down-arrow.svg
deleted file mode 100644
index 5d76a64e9..000000000
--- a/src/librustdoc/html/static/images/down-arrow.svg
+++ /dev/null
@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="Layer_1" width="128" height="128" enable-background="new 0 0 128 128" version="1.1" viewBox="-30 -20 176 176" xml:space="preserve"><g><line x1="111" x2="64" y1="40.5" y2="87.499" fill="none" stroke="#000000" stroke-linecap="square" stroke-miterlimit="10" stroke-width="12"/><line x1="64" x2="17" y1="87.499" y2="40.5" fill="none" stroke="#000000" stroke-linecap="square" stroke-miterlimit="10" stroke-width="12"/></g></svg>
\ No newline at end of file
diff --git a/src/librustdoc/html/static/images/toggle-minus.svg b/src/librustdoc/html/static/images/toggle-minus.svg
deleted file mode 100644
index 73154788a..000000000
--- a/src/librustdoc/html/static/images/toggle-minus.svg
+++ /dev/null
@@ -1 +0,0 @@
-<svg width="17" height="17" shape-rendering="crispEdges" stroke="#000" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M5 2.5H2.5v12H5m7-12h2.5v12H12M5 8.5h7"/></svg>
\ No newline at end of file
diff --git a/src/librustdoc/html/static/images/toggle-plus.svg b/src/librustdoc/html/static/images/toggle-plus.svg
deleted file mode 100644
index 08b17033e..000000000
--- a/src/librustdoc/html/static/images/toggle-plus.svg
+++ /dev/null
@@ -1 +0,0 @@
-<svg width="17" height="17" shape-rendering="crispEdges" stroke="#000" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M5 2.5H2.5v12H5m7-12h2.5v12H12M5 8.5h7M8.5 12V8.625v0V5"/></svg>
\ No newline at end of file
diff --git a/src/librustdoc/html/static/images/wheel.svg b/src/librustdoc/html/static/images/wheel.svg
index 01da3b24c..83c07f63d 100644
--- a/src/librustdoc/html/static/images/wheel.svg
+++ b/src/librustdoc/html/static/images/wheel.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="Capa_1" width="27.434" height="29.5" enable-background="new 0 0 27.434 29.5" version="1.1" viewBox="0 0 27.434 29.5" xml:space="preserve"><g><path d="M27.315,18.389c-0.165-0.604-0.509-1.113-0.981-1.459c-0.042-0.144-0.083-0.429-0.015-0.761l0.037-0.177v-0.182V14.8 c0-1.247-0.006-1.277-0.048-1.472c-0.076-0.354-0.035-0.653,0.007-0.803c0.477-0.346,0.828-0.861,0.996-1.476 c0.261-0.956,0.076-2.091-0.508-3.114l-0.591-1.032c-0.746-1.307-1.965-2.119-3.182-2.119c-0.378,0-0.75,0.081-1.085,0.235 c-0.198-0.025-0.554-0.15-0.855-0.389l-0.103-0.082l-0.114-0.065l-1.857-1.067L18.92,3.36l-0.105-0.044 c-0.376-0.154-0.658-0.41-0.768-0.556C17.918,1.172,16.349,0,14.296,0H13.14c-2.043,0-3.608,1.154-3.749,2.721 C9.277,2.862,8.999,3.104,8.633,3.25l-0.1,0.039L8.439,3.341L6.495,4.406L6.363,4.479L6.245,4.573 C5.936,4.82,5.596,4.944,5.416,4.977c-0.314-0.139-0.66-0.21-1.011-0.21c-1.198,0-2.411,0.819-3.165,2.139L0.65,7.938 c-0.412,0.72-0.642,1.521-0.644,2.258c-0.003,0.952,0.362,1.756,1.013,2.256c0.034,0.155,0.061,0.448-0.016,0.786 c-0.038,0.168-0.062,0.28-0.062,1.563c0,1.148,0,1.148,0.015,1.262l0.009,0.073l0.017,0.073c0.073,0.346,0.045,0.643,0.011,0.802 C0.348,17.512-0.01,18.314,0,19.268c0.008,0.729,0.238,1.523,0.648,2.242l0.589,1.031c0.761,1.331,1.967,2.159,3.15,2.159 c0.324,0,0.645-0.064,0.938-0.187c0.167,0.038,0.492,0.156,0.813,0.416l0.11,0.088l0.124,0.07l2.045,1.156l0.102,0.057l0.107,0.043 c0.364,0.147,0.646,0.381,0.766,0.521c0.164,1.52,1.719,2.634,3.745,2.634h1.155c2.037,0,3.598-1.134,3.747-2.675 c0.117-0.145,0.401-0.393,0.774-0.549l0.111-0.047l0.105-0.062l1.96-1.159l0.105-0.062l0.097-0.075 c0.309-0.246,0.651-0.371,0.832-0.402c0.313,0.138,0.662,0.212,1.016,0.212c1.199,0,2.412-0.82,3.166-2.139l0.59-1.032 C27.387,20.48,27.575,19.342,27.315,18.389z M25.274,20.635l-0.59,1.032c-0.438,0.765-1.104,1.251-1.639,1.251 c-0.133,0-0.258-0.029-0.369-0.094c-0.15-0.086-0.346-0.127-0.566-0.127c-0.596,0-1.383,0.295-2.01,0.796l-1.96,1.157 c-1.016,0.425-1.846,1.291-1.846,1.929s-0.898,1.159-1.998,1.159H13.14c-1.1,0-1.998-0.514-1.998-1.141s-0.834-1.477-1.854-1.888 l-2.046-1.157c-0.636-0.511-1.425-0.814-2.006-0.814c-0.202,0-0.379,0.037-0.516,0.115c-0.101,0.057-0.214,0.084-0.333,0.084 c-0.518,0-1.179-0.498-1.62-1.271l-0.591-1.032c-0.545-0.954-0.556-1.983-0.024-2.286c0.532-0.305,0.78-1.432,0.551-2.506 c0,0,0-0.003,0-1.042c0-1.088,0.021-1.18,0.021-1.18c0.238-1.072-0.01-2.203-0.552-2.513C1.631,10.8,1.634,9.765,2.18,8.812 L2.769,7.78c0.438-0.766,1.103-1.251,1.636-1.251c0.131,0,0.255,0.029,0.365,0.092C4.92,6.707,5.114,6.747,5.334,6.747 c0.596,0,1.38-0.296,2.007-0.795l1.944-1.065c1.021-0.407,1.856-1.277,1.856-1.933c0-0.656,0.898-1.192,1.998-1.192h1.156V1.761 c1.1,0,1.998,0.545,1.998,1.211c0,0.667,0.832,1.554,1.849,1.973L20,6.013c0.618,0.489,1.401,0.775,2.012,0.775 c0.24,0,0.454-0.045,0.62-0.139c0.122-0.069,0.259-0.102,0.403-0.102c0.551,0,1.221,0.476,1.653,1.231l0.59,1.032 c0.544,0.953,0.518,2.004-0.062,2.334c-0.577,0.331-0.859,1.48-0.627,2.554c0,0,0.01,0.042,0.01,1.103c0,1.012,0,1.012,0,1.012 c-0.218,1.049,0.068,2.174,0.636,2.498C25.802,18.635,25.819,19.68,25.274,20.635z"/><path d="M13.61,7.611c-3.913,0-7.084,3.173-7.084,7.085c0,3.914,3.171,7.085,7.084,7.085s7.085-3.172,7.085-7.085 C20.695,10.784,17.523,7.611,13.61,7.611z M13.61,20.02c-2.936,0-5.323-2.388-5.323-5.323c0-2.935,2.388-5.323,5.323-5.323 s5.324,2.388,5.324,5.323C18.934,17.632,16.546,20.02,13.61,20.02z"/><path d="M13.682,9.908c-2.602,0-4.718,2.116-4.718,4.718c0,2.601,2.116,4.716,4.718,4.716c2.601,0,4.717-2.115,4.717-4.716 C18.399,12.024,16.283,9.908,13.682,9.908z M13.682,17.581c-1.633,0-2.956-1.323-2.956-2.955s1.323-2.956,2.956-2.956 c1.632,0,2.956,1.324,2.956,2.956S15.314,17.581,13.682,17.581z"/></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" width="27.434" height="29.5" enable-background="new 0 0 27.434 29.5" viewBox="0 0 27.434 29.5"><path d="M27.316 18.39a2.696 2.696 0 0 0-.98-1.46 1.62 1.62 0 0 1-.016-.762l.035-.176v-1.191c0-1.246-.003-1.278-.046-1.473a1.717 1.717 0 0 1 .007-.805c.477-.343.829-.859.997-1.472.257-.957.074-2.094-.508-3.117l-.594-1.032c-.746-1.304-1.965-2.117-3.18-2.117-.379 0-.75.078-1.086.235a1.958 1.958 0 0 1-.855-.391l-.102-.082-.117-.063-1.855-1.07-.094-.055-.106-.043c-.378-.156-.66-.41-.77-.554C17.919 1.172 16.349 0 14.297 0h-1.155c-2.043 0-3.61 1.152-3.75 2.723-.114.14-.391.382-.758.527l-.102.04-.094.05-1.94 1.066-.134.074-.117.094a2.019 2.019 0 0 1-.832.403 2.518 2.518 0 0 0-1.008-.211c-1.199 0-2.414.82-3.168 2.14l-.59 1.032c-.41.718-.64 1.523-.64 2.257-.004.953.36 1.758 1.012 2.258.035.152.058.445-.016.785-.04.168-.063.282-.063 1.563 0 1.148 0 1.148.016 1.261l.008.075.015.074c.075.344.047.64.012.8-.644.5-1.004 1.302-.992 2.259.008.726.238 1.52.648 2.242l.59 1.027c.758 1.332 1.965 2.16 3.149 2.16.324 0 .644-.062.937-.187.168.039.492.156.813.418l.11.086.124.07 2.047 1.156.102.059.105.043c.363.144.648.379.766.52.164 1.519 1.718 2.632 3.746 2.632h1.156c2.035 0 3.598-1.133 3.746-2.672.117-.144.402-.394.773-.55l.114-.047.101-.063 1.961-1.156.106-.063.097-.078c.309-.246.653-.37.832-.398.313.136.66.21 1.016.21 1.2 0 2.41-.82 3.164-2.14l.594-1.031c.59-1.028.777-2.164.52-3.117Zm-2.043 2.247-.59 1.031c-.437.766-1.105 1.25-1.636 1.25a.7.7 0 0 1-.371-.094 1.146 1.146 0 0 0-.567-.129c-.593 0-1.382.297-2.007.797l-1.961 1.156c-1.016.426-1.848 1.293-1.848 1.93 0 .64-.898 1.16-1.996 1.16H13.14c-1.102 0-2-.515-2-1.14 0-.63-.832-1.477-1.852-1.887l-2.047-1.16c-.637-.512-1.426-.813-2.008-.813-.199 0-.379.035-.515.114a.648.648 0 0 1-.332.085c-.52 0-1.18-.5-1.621-1.273l-.59-1.031c-.543-.953-.555-1.98-.024-2.285.532-.305.782-1.434.551-2.504V14.8c0-1.09.02-1.18.02-1.18.238-1.074-.008-2.203-.551-2.516-.54-.304-.54-1.34.008-2.293l.59-1.03c.437-.766 1.101-1.255 1.636-1.255a.73.73 0 0 1 .364.094c.152.086.343.125.566.125.594 0 1.379-.297 2.004-.793l1.945-1.066c1.02-.407 1.856-1.278 1.856-1.934 0-.656.898-1.191 2-1.191h1.156c1.098 0 1.996.543 1.996 1.21 0 .669.832 1.555 1.848 1.973L20 6.012c.617.492 1.402.777 2.012.777.242 0 .453-.047.62-.14a.79.79 0 0 1 .403-.102c.55 0 1.223.476 1.652 1.23l.59 1.032c.543.953.52 2.004-.062 2.336-.574.332-.86 1.48-.625 2.554 0 0 .008.04.008 1.102v1.011c-.215 1.051.07 2.176.636 2.5.567.325.586 1.368.04 2.325Zm0 0"/><path d="M13.61 7.61a7.084 7.084 0 0 0-7.083 7.085 7.085 7.085 0 1 0 14.168 0A7.088 7.088 0 0 0 13.61 7.61Zm0 12.41a5.33 5.33 0 0 1-5.325-5.325 5.33 5.33 0 0 1 5.324-5.32 5.327 5.327 0 0 1 5.325 5.32 5.328 5.328 0 0 1-5.325 5.325Zm0 0"/><path d="M13.684 9.906a4.722 4.722 0 0 0-4.72 4.719 4.722 4.722 0 0 0 4.72 4.719 4.724 4.724 0 0 0 4.714-4.719 4.724 4.724 0 0 0-4.714-4.719Zm0 7.676a2.954 2.954 0 1 1 0-5.91 2.953 2.953 0 0 1 2.953 2.953 2.957 2.957 0 0 1-2.953 2.957Zm0 0"/></svg>
\ No newline at end of file
diff --git a/src/librustdoc/html/static/js/main.js b/src/librustdoc/html/static/js/main.js
index 604ab147f..5e8c0e8d1 100644
--- a/src/librustdoc/html/static/js/main.js
+++ b/src/librustdoc/html/static/js/main.js
@@ -180,7 +180,6 @@ function browserSupportsHistoryApi() {
     return window.history && typeof window.history.pushState === "function";
 }
 
-// eslint-disable-next-line no-unused-vars
 function loadCss(cssUrl) {
     const link = document.createElement("link");
     link.href = cssUrl;
@@ -379,7 +378,7 @@ function loadCss(cssUrl) {
         }
         ev.preventDefault();
         searchState.defocus();
-        window.hideAllModals(true); // true = reset focus for notable traits
+        window.hideAllModals(true); // true = reset focus for tooltips
     }
 
     function handleShortcut(ev) {
@@ -456,10 +455,7 @@ function loadCss(cssUrl) {
             const ul = document.createElement("ul");
             ul.className = "block " + shortty;
 
-            for (const item of filtered) {
-                const name = item[0];
-                const desc = item[1]; // can be null
-
+            for (const name of filtered) {
                 let path;
                 if (shortty === "mod") {
                     path = name + "/index.html";
@@ -469,7 +465,6 @@ function loadCss(cssUrl) {
                 const current_page = document.location.href.split("/").pop();
                 const link = document.createElement("a");
                 link.href = path;
-                link.title = desc;
                 if (path === current_page) {
                     link.className = "current";
                 }
@@ -789,17 +784,17 @@ function loadCss(cssUrl) {
             // we need to switch away from mobile mode and make the main content area scrollable.
             hideSidebar();
         }
-        if (window.CURRENT_NOTABLE_ELEMENT) {
-            // As a workaround to the behavior of `contains: layout` used in doc togglers, the
-            // notable traits popup is positioned using javascript.
+        if (window.CURRENT_TOOLTIP_ELEMENT) {
+            // As a workaround to the behavior of `contains: layout` used in doc togglers,
+            // tooltip popovers are positioned using javascript.
             //
             // This means when the window is resized, we need to redo the layout.
-            const base = window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE;
-            const force_visible = base.NOTABLE_FORCE_VISIBLE;
-            hideNotable(false);
+            const base = window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE;
+            const force_visible = base.TOOLTIP_FORCE_VISIBLE;
+            hideTooltip(false);
             if (force_visible) {
-                showNotable(base);
-                base.NOTABLE_FORCE_VISIBLE = true;
+                showTooltip(base);
+                base.TOOLTIP_FORCE_VISIBLE = true;
             }
         }
     });
@@ -827,27 +822,35 @@ function loadCss(cssUrl) {
         });
     });
 
-    function showNotable(e) {
-        if (!window.NOTABLE_TRAITS) {
+    function showTooltip(e) {
+        const notable_ty = e.getAttribute("data-notable-ty");
+        if (!window.NOTABLE_TRAITS && notable_ty) {
             const data = document.getElementById("notable-traits-data");
             if (data) {
                 window.NOTABLE_TRAITS = JSON.parse(data.innerText);
             } else {
-                throw new Error("showNotable() called on page without any notable traits!");
+                throw new Error("showTooltip() called with notable without any notable traits!");
             }
         }
-        if (window.CURRENT_NOTABLE_ELEMENT && window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE === e) {
+        if (window.CURRENT_TOOLTIP_ELEMENT && window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE === e) {
             // Make this function idempotent.
             return;
         }
         window.hideAllModals(false);
-        const ty = e.getAttribute("data-ty");
         const wrapper = document.createElement("div");
-        wrapper.innerHTML = "<div class=\"content\">" + window.NOTABLE_TRAITS[ty] + "</div>";
-        wrapper.className = "notable popover";
+        if (notable_ty) {
+            wrapper.innerHTML = "<div class=\"content\">" +
+                window.NOTABLE_TRAITS[notable_ty] + "</div>";
+        } else if (e.getAttribute("title") !== undefined) {
+            const titleContent = document.createElement("div");
+            titleContent.className = "content";
+            titleContent.appendChild(document.createTextNode(e.getAttribute("title")));
+            wrapper.appendChild(titleContent);
+        }
+        wrapper.className = "tooltip popover";
         const focusCatcher = document.createElement("div");
         focusCatcher.setAttribute("tabindex", "0");
-        focusCatcher.onfocus = hideNotable;
+        focusCatcher.onfocus = hideTooltip;
         wrapper.appendChild(focusCatcher);
         const pos = e.getBoundingClientRect();
         // 5px overlap so that the mouse can easily travel from place to place
@@ -869,62 +872,62 @@ function loadCss(cssUrl) {
             );
         }
         wrapper.style.visibility = "";
-        window.CURRENT_NOTABLE_ELEMENT = wrapper;
-        window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE = e;
+        window.CURRENT_TOOLTIP_ELEMENT = wrapper;
+        window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE = e;
         wrapper.onpointerleave = function(ev) {
             // If this is a synthetic touch event, ignore it. A click event will be along shortly.
             if (ev.pointerType !== "mouse") {
                 return;
             }
-            if (!e.NOTABLE_FORCE_VISIBLE && !elemIsInParent(event.relatedTarget, e)) {
-                hideNotable(true);
+            if (!e.TOOLTIP_FORCE_VISIBLE && !elemIsInParent(event.relatedTarget, e)) {
+                hideTooltip(true);
             }
         };
     }
 
-    function notableBlurHandler(event) {
-        if (window.CURRENT_NOTABLE_ELEMENT &&
-            !elemIsInParent(document.activeElement, window.CURRENT_NOTABLE_ELEMENT) &&
-            !elemIsInParent(event.relatedTarget, window.CURRENT_NOTABLE_ELEMENT) &&
-            !elemIsInParent(document.activeElement, window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE) &&
-            !elemIsInParent(event.relatedTarget, window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE)
+    function tooltipBlurHandler(event) {
+        if (window.CURRENT_TOOLTIP_ELEMENT &&
+            !elemIsInParent(document.activeElement, window.CURRENT_TOOLTIP_ELEMENT) &&
+            !elemIsInParent(event.relatedTarget, window.CURRENT_TOOLTIP_ELEMENT) &&
+            !elemIsInParent(document.activeElement, window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE) &&
+            !elemIsInParent(event.relatedTarget, window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE)
         ) {
             // Work around a difference in the focus behaviour between Firefox, Chrome, and Safari.
-            // When I click the button on an already-opened notable trait popover, Safari
+            // When I click the button on an already-opened tooltip popover, Safari
             // hides the popover and then immediately shows it again, while everyone else hides it
             // and it stays hidden.
             //
             // To work around this, make sure the click finishes being dispatched before
-            // hiding the popover. Since `hideNotable()` is idempotent, this makes Safari behave
+            // hiding the popover. Since `hideTooltip()` is idempotent, this makes Safari behave
             // consistently with the other two.
-            setTimeout(() => hideNotable(false), 0);
+            setTimeout(() => hideTooltip(false), 0);
         }
     }
 
-    function hideNotable(focus) {
-        if (window.CURRENT_NOTABLE_ELEMENT) {
-            if (window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE.NOTABLE_FORCE_VISIBLE) {
+    function hideTooltip(focus) {
+        if (window.CURRENT_TOOLTIP_ELEMENT) {
+            if (window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE.TOOLTIP_FORCE_VISIBLE) {
                 if (focus) {
-                    window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE.focus();
+                    window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE.focus();
                 }
-                window.CURRENT_NOTABLE_ELEMENT.NOTABLE_BASE.NOTABLE_FORCE_VISIBLE = false;
+                window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE.TOOLTIP_FORCE_VISIBLE = false;
             }
             const body = document.getElementsByTagName("body")[0];
-            body.removeChild(window.CURRENT_NOTABLE_ELEMENT);
-            window.CURRENT_NOTABLE_ELEMENT = null;
+            body.removeChild(window.CURRENT_TOOLTIP_ELEMENT);
+            window.CURRENT_TOOLTIP_ELEMENT = null;
         }
     }
 
-    onEachLazy(document.getElementsByClassName("notable-traits"), e => {
+    onEachLazy(document.getElementsByClassName("tooltip"), e => {
         e.onclick = function() {
-            this.NOTABLE_FORCE_VISIBLE = this.NOTABLE_FORCE_VISIBLE ? false : true;
-            if (window.CURRENT_NOTABLE_ELEMENT && !this.NOTABLE_FORCE_VISIBLE) {
-                hideNotable(true);
+            this.TOOLTIP_FORCE_VISIBLE = this.TOOLTIP_FORCE_VISIBLE ? false : true;
+            if (window.CURRENT_TOOLTIP_ELEMENT && !this.TOOLTIP_FORCE_VISIBLE) {
+                hideTooltip(true);
             } else {
-                showNotable(this);
-                window.CURRENT_NOTABLE_ELEMENT.setAttribute("tabindex", "0");
-                window.CURRENT_NOTABLE_ELEMENT.focus();
-                window.CURRENT_NOTABLE_ELEMENT.onblur = notableBlurHandler;
+                showTooltip(this);
+                window.CURRENT_TOOLTIP_ELEMENT.setAttribute("tabindex", "0");
+                window.CURRENT_TOOLTIP_ELEMENT.focus();
+                window.CURRENT_TOOLTIP_ELEMENT.onblur = tooltipBlurHandler;
             }
             return false;
         };
@@ -933,16 +936,16 @@ function loadCss(cssUrl) {
             if (ev.pointerType !== "mouse") {
                 return;
             }
-            showNotable(this);
+            showTooltip(this);
         };
         e.onpointerleave = function(ev) {
             // If this is a synthetic touch event, ignore it. A click event will be along shortly.
             if (ev.pointerType !== "mouse") {
                 return;
             }
-            if (!this.NOTABLE_FORCE_VISIBLE &&
-                !elemIsInParent(ev.relatedTarget, window.CURRENT_NOTABLE_ELEMENT)) {
-                hideNotable(true);
+            if (!this.TOOLTIP_FORCE_VISIBLE &&
+                !elemIsInParent(ev.relatedTarget, window.CURRENT_TOOLTIP_ELEMENT)) {
+                hideTooltip(true);
             }
         };
     });
@@ -1044,14 +1047,14 @@ function loadCss(cssUrl) {
     }
 
     /**
-     * Hide popover menus, notable trait tooltips, and the sidebar (if applicable).
+     * Hide popover menus, clickable tooltips, and the sidebar (if applicable).
      *
-     * Pass "true" to reset focus for notable traits.
+     * Pass "true" to reset focus for tooltip popovers.
      */
     window.hideAllModals = function(switchFocus) {
         hideSidebar();
         window.hidePopoverMenus();
-        hideNotable(switchFocus);
+        hideTooltip(switchFocus);
     };
 
     /**
@@ -1142,7 +1145,11 @@ function loadCss(cssUrl) {
 (function() {
     let reset_button_timeout = null;
 
-    window.copy_path = but => {
+    const but = document.getElementById("copy-path");
+    if (!but) {
+        return;
+    }
+    but.onclick = () => {
         const parent = but.parentElement;
         const path = [];
 
diff --git a/src/librustdoc/html/static/js/search.js b/src/librustdoc/html/static/js/search.js
index 88592fa0c..b98bced41 100644
--- a/src/librustdoc/html/static/js/search.js
+++ b/src/librustdoc/html/static/js/search.js
@@ -112,7 +112,6 @@ function levenshtein(s1, s2) {
 }
 
 function initSearch(rawSearchIndex) {
-    const MAX_LEV_DISTANCE = 3;
     const MAX_RESULTS = 200;
     const NO_TYPE_FILTER = -1;
     /**
@@ -143,13 +142,11 @@ function initSearch(rawSearchIndex) {
     }
 
     function itemTypeFromName(typename) {
-        for (let i = 0, len = itemTypes.length; i < len; ++i) {
-            if (itemTypes[i] === typename) {
-                return i;
-            }
+        const index = itemTypes.findIndex(i => i === typename);
+        if (index < 0) {
+            throw ["Unknown type filter ", typename];
         }
-
-        throw new Error("Unknown type filter `" + typename + "`");
+        return index;
     }
 
     /**
@@ -167,21 +164,21 @@ function initSearch(rawSearchIndex) {
      */
     function getStringElem(query, parserState, isInGenerics) {
         if (isInGenerics) {
-            throw new Error("`\"` cannot be used in generics");
+            throw ["Unexpected ", "\"", " in generics"];
         } else if (query.literalSearch) {
-            throw new Error("Cannot have more than one literal search element");
+            throw ["Cannot have more than one literal search element"];
         } else if (parserState.totalElems - parserState.genericsElems > 0) {
-            throw new Error("Cannot use literal search when there is more than one element");
+            throw ["Cannot use literal search when there is more than one element"];
         }
         parserState.pos += 1;
         const start = parserState.pos;
         const end = getIdentEndPosition(parserState);
         if (parserState.pos >= parserState.length) {
-            throw new Error("Unclosed `\"`");
+            throw ["Unclosed ", "\""];
         } else if (parserState.userQuery[end] !== "\"") {
-            throw new Error(`Unexpected \`${parserState.userQuery[end]}\` in a string element`);
+            throw ["Unexpected ", parserState.userQuery[end], " in a string element"];
         } else if (start === end) {
-            throw new Error("Cannot have empty string element");
+            throw ["Cannot have empty string element"];
         }
         // To skip the quote at the end.
         parserState.pos += 1;
@@ -260,7 +257,7 @@ function initSearch(rawSearchIndex) {
             return;
         }
         if (query.literalSearch && parserState.totalElems - parserState.genericsElems > 0) {
-            throw new Error("You cannot have more than one element if you use quotes");
+            throw ["You cannot have more than one element if you use quotes"];
         }
         const pathSegments = name.split("::");
         if (pathSegments.length > 1) {
@@ -269,17 +266,17 @@ function initSearch(rawSearchIndex) {
 
                 if (pathSegment.length === 0) {
                     if (i === 0) {
-                        throw new Error("Paths cannot start with `::`");
+                        throw ["Paths cannot start with ", "::"];
                     } else if (i + 1 === len) {
-                        throw new Error("Paths cannot end with `::`");
+                        throw ["Paths cannot end with ", "::"];
                     }
-                    throw new Error("Unexpected `::::`");
+                    throw ["Unexpected ", "::::"];
                 }
             }
         }
         // In case we only have something like `<p>`, there is no name.
         if (pathSegments.length === 0 || (pathSegments.length === 1 && pathSegments[0] === "")) {
-            throw new Error("Found generics without a path");
+            throw ["Found generics without a path"];
         }
         parserState.totalElems += 1;
         if (isInGenerics) {
@@ -303,22 +300,23 @@ function initSearch(rawSearchIndex) {
      * @return {integer}
      */
     function getIdentEndPosition(parserState) {
+        const start = parserState.pos;
         let end = parserState.pos;
-        let foundExclamation = false;
+        let foundExclamation = -1;
         while (parserState.pos < parserState.length) {
             const c = parserState.userQuery[parserState.pos];
             if (!isIdentCharacter(c)) {
                 if (c === "!") {
-                    if (foundExclamation) {
-                        throw new Error("Cannot have more than one `!` in an ident");
+                    if (foundExclamation !== -1) {
+                        throw ["Cannot have more than one ", "!", " in an ident"];
                     } else if (parserState.pos + 1 < parserState.length &&
                         isIdentCharacter(parserState.userQuery[parserState.pos + 1])
                     ) {
-                        throw new Error("`!` can only be at the end of an ident");
+                        throw ["Unexpected ", "!", ": it can only be at the end of an ident"];
                     }
-                    foundExclamation = true;
+                    foundExclamation = parserState.pos;
                 } else if (isErrorCharacter(c)) {
-                    throw new Error(`Unexpected \`${c}\``);
+                    throw ["Unexpected ", c];
                 } else if (
                     isStopCharacter(c) ||
                     isSpecialStartCharacter(c) ||
@@ -329,16 +327,40 @@ function initSearch(rawSearchIndex) {
                     if (!isPathStart(parserState)) {
                         break;
                     }
+                    if (foundExclamation !== -1) {
+                        if (start <= (end - 2)) {
+                            throw ["Cannot have associated items in macros"];
+                        } else {
+                            // if start == end - 1, we got the never type
+                            // while the never type has no associated macros, we still
+                            // can parse a path like that
+                            foundExclamation = -1;
+                        }
+                    }
                     // Skip current ":".
                     parserState.pos += 1;
-                    foundExclamation = false;
                 } else {
-                    throw new Error(`Unexpected \`${c}\``);
+                    throw ["Unexpected ", c];
                 }
             }
             parserState.pos += 1;
             end = parserState.pos;
         }
+        // if start == end - 1, we got the never type
+        if (foundExclamation !== -1 && start <= (end - 2)) {
+            if (parserState.typeFilter === null) {
+                parserState.typeFilter = "macro";
+            } else if (parserState.typeFilter !== "macro") {
+                throw [
+                    "Invalid search type: macro ",
+                    "!",
+                    " and ",
+                    parserState.typeFilter,
+                    " both specified",
+                ];
+            }
+            end = foundExclamation;
+        }
         return end;
     }
 
@@ -365,9 +387,9 @@ function initSearch(rawSearchIndex) {
             parserState.userQuery[parserState.pos] === "<"
         ) {
             if (isInGenerics) {
-                throw new Error("Unexpected `<` after `<`");
+                throw ["Unexpected ", "<", " after ", "<"];
             } else if (start >= end) {
-                throw new Error("Found generics without a path");
+                throw ["Found generics without a path"];
             }
             parserState.pos += 1;
             getItemsBefore(query, parserState, generics, ">");
@@ -411,24 +433,51 @@ function initSearch(rawSearchIndex) {
                 foundStopChar = true;
                 continue;
             } else if (c === ":" && isPathStart(parserState)) {
-                throw new Error("Unexpected `::`: paths cannot start with `::`");
+                throw ["Unexpected ", "::", ": paths cannot start with ", "::"];
             } else if (c === ":" || isEndCharacter(c)) {
                 let extra = "";
                 if (endChar === ">") {
-                    extra = "`<`";
+                    extra = "<";
                 } else if (endChar === "") {
-                    extra = "`->`";
+                    extra = "->";
+                } else {
+                    extra = endChar;
                 }
-                throw new Error("Unexpected `" + c + "` after " + extra);
+                throw ["Unexpected ", c, " after ", extra];
             }
             if (!foundStopChar) {
                 if (endChar !== "") {
-                    throw new Error(`Expected \`,\`, \` \` or \`${endChar}\`, found \`${c}\``);
+                    throw [
+                        "Expected ",
+                        ",", // comma
+                        ", ",
+                        "&nbsp;", // whitespace
+                        " or ",
+                        endChar,
+                        ", found ",
+                        c,
+                    ];
                 }
-                throw new Error(`Expected \`,\` or \` \`, found \`${c}\``);
+                throw [
+                    "Expected ",
+                    ",", // comma
+                    " or ",
+                    "&nbsp;", // whitespace
+                    ", found ",
+                    c,
+                ];
             }
             const posBefore = parserState.pos;
             getNextElem(query, parserState, elems, endChar === ">");
+            if (endChar !== "") {
+                if (parserState.pos >= parserState.length) {
+                    throw ["Unclosed ", "<"];
+                }
+                const c2 = parserState.userQuery[parserState.pos];
+                if (!isSeparatorCharacter(c2) && c2 !== endChar) {
+                    throw ["Expected ", endChar, ", found ", c2];
+                }
+            }
             // This case can be encountered if `getNextElem` encountered a "stop character" right
             // from the start. For example if you have `,,` or `<>`. In this case, we simply move up
             // the current position to continue the parsing.
@@ -437,7 +486,10 @@ function initSearch(rawSearchIndex) {
             }
             foundStopChar = false;
         }
-        // We are either at the end of the string or on the `endChar`` character, let's move forward
+        if (parserState.pos >= parserState.length && endChar !== "") {
+            throw ["Unclosed ", "<"];
+        }
+        // We are either at the end of the string or on the `endChar` character, let's move forward
         // in any case.
         parserState.pos += 1;
     }
@@ -453,7 +505,7 @@ function initSearch(rawSearchIndex) {
 
         for (let pos = 0; pos < parserState.pos; ++pos) {
             if (!isIdentCharacter(query[pos]) && !isWhitespaceCharacter(query[pos])) {
-                throw new Error(`Unexpected \`${query[pos]}\` in type filter`);
+                throw ["Unexpected ", query[pos], " in type filter"];
             }
         }
     }
@@ -466,11 +518,10 @@ function initSearch(rawSearchIndex) {
      * @param {ParserState} parserState
      */
     function parseInput(query, parserState) {
-        let c, before;
         let foundStopChar = true;
 
         while (parserState.pos < parserState.length) {
-            c = parserState.userQuery[parserState.pos];
+            const c = parserState.userQuery[parserState.pos];
             if (isStopCharacter(c)) {
                 foundStopChar = true;
                 if (isSeparatorCharacter(c)) {
@@ -480,19 +531,19 @@ function initSearch(rawSearchIndex) {
                     if (isReturnArrow(parserState)) {
                         break;
                     }
-                    throw new Error(`Unexpected \`${c}\` (did you mean \`->\`?)`);
+                    throw ["Unexpected ", c, " (did you mean ", "->", "?)"];
                 }
-                throw new Error(`Unexpected \`${c}\``);
+                throw ["Unexpected ", c];
             } else if (c === ":" && !isPathStart(parserState)) {
                 if (parserState.typeFilter !== null) {
-                    throw new Error("Unexpected `:`");
+                    throw ["Unexpected ", ":"];
                 }
                 if (query.elems.length === 0) {
-                    throw new Error("Expected type filter before `:`");
+                    throw ["Expected type filter before ", ":"];
                 } else if (query.elems.length !== 1 || parserState.totalElems !== 1) {
-                    throw new Error("Unexpected `:`");
+                    throw ["Unexpected ", ":"];
                 } else if (query.literalSearch) {
-                    throw new Error("You cannot use quotes on type filter");
+                    throw ["You cannot use quotes on type filter"];
                 }
                 checkExtraTypeFilterCharacters(parserState);
                 // The type filter doesn't count as an element since it's a modifier.
@@ -505,11 +556,31 @@ function initSearch(rawSearchIndex) {
             }
             if (!foundStopChar) {
                 if (parserState.typeFilter !== null) {
-                    throw new Error(`Expected \`,\`, \` \` or \`->\`, found \`${c}\``);
+                    throw [
+                        "Expected ",
+                        ",", // comma
+                        ", ",
+                        "&nbsp;", // whitespace
+                        " or ",
+                        "->", // arrow
+                        ", found ",
+                        c,
+                    ];
                 }
-                throw new Error(`Expected \`,\`, \` \`, \`:\` or \`->\`, found \`${c}\``);
-            }
-            before = query.elems.length;
+                throw [
+                    "Expected ",
+                    ",", // comma
+                    ", ",
+                    "&nbsp;", // whitespace
+                    ", ",
+                    ":", // colon
+                    " or ",
+                    "->", // arrow
+                    ", found ",
+                    c,
+                ];
+            }
+            const before = query.elems.length;
             getNextElem(query, parserState, query.elems, false);
             if (query.elems.length === before) {
                 // Nothing was added, weird... Let's increase the position to not remain stuck.
@@ -518,14 +589,13 @@ function initSearch(rawSearchIndex) {
             foundStopChar = false;
         }
         while (parserState.pos < parserState.length) {
-            c = parserState.userQuery[parserState.pos];
             if (isReturnArrow(parserState)) {
                 parserState.pos += 2;
                 // Get returned elements.
                 getItemsBefore(query, parserState, query.returned, "");
                 // Nothing can come afterward!
                 if (query.returned.length === 0) {
-                    throw new Error("Expected at least one item after `->`");
+                    throw ["Expected at least one item after ", "->"];
                 }
                 break;
             } else {
@@ -594,8 +664,8 @@ function initSearch(rawSearchIndex) {
      *
      * The supported syntax by this parser is as follow:
      *
-     * ident = *(ALPHA / DIGIT / "_") [!]
-     * path = ident *(DOUBLE-COLON ident)
+     * ident = *(ALPHA / DIGIT / "_")
+     * path = ident *(DOUBLE-COLON ident) [!]
      * arg = path [generics]
      * arg-without-generic = path
      * type-sep = COMMA/WS *(COMMA/WS)
@@ -679,7 +749,7 @@ function initSearch(rawSearchIndex) {
             }
         } catch (err) {
             query = newParsedQuery(userQuery);
-            query.error = err.message;
+            query.error = err;
             query.typeFilter = -1;
             return query;
         }
@@ -897,13 +967,13 @@ function initSearch(rawSearchIndex) {
          * @param {QueryElement} elem  - The element from the parsed query.
          * @param {integer} defaultLev - This is the value to return in case there are no generics.
          *
-         * @return {integer}           - Returns the best match (if any) or `MAX_LEV_DISTANCE + 1`.
+         * @return {integer}           - Returns the best match (if any) or `maxLevDistance + 1`.
          */
-        function checkGenerics(row, elem, defaultLev) {
+        function checkGenerics(row, elem, defaultLev, maxLevDistance) {
             if (row.generics.length === 0) {
-                return elem.generics.length === 0 ? defaultLev : MAX_LEV_DISTANCE + 1;
+                return elem.generics.length === 0 ? defaultLev : maxLevDistance + 1;
             } else if (row.generics.length > 0 && row.generics[0].name === null) {
-                return checkGenerics(row.generics[0], elem, defaultLev);
+                return checkGenerics(row.generics[0], elem, defaultLev, maxLevDistance);
             }
             // The names match, but we need to be sure that all generics kinda
             // match as well.
@@ -914,8 +984,8 @@ function initSearch(rawSearchIndex) {
                     elem_name = entry.name;
                     if (elem_name === "") {
                         // Pure generic, needs to check into it.
-                        if (checkGenerics(entry, elem, MAX_LEV_DISTANCE + 1) !== 0) {
-                            return MAX_LEV_DISTANCE + 1;
+                        if (checkGenerics(entry, elem, maxLevDistance + 1, maxLevDistance) !== 0) {
+                            return maxLevDistance + 1;
                         }
                         continue;
                     }
@@ -942,7 +1012,7 @@ function initSearch(rawSearchIndex) {
                         }
                     }
                     if (match === null) {
-                        return MAX_LEV_DISTANCE + 1;
+                        return maxLevDistance + 1;
                     }
                     elems[match] -= 1;
                     if (elems[match] === 0) {
@@ -951,7 +1021,7 @@ function initSearch(rawSearchIndex) {
                 }
                 return 0;
             }
-            return MAX_LEV_DISTANCE + 1;
+            return maxLevDistance + 1;
         }
 
         /**
@@ -963,10 +1033,10 @@ function initSearch(rawSearchIndex) {
           *
           * @return {integer} - Returns a Levenshtein distance to the best match.
           */
-        function checkIfInGenerics(row, elem) {
-            let lev = MAX_LEV_DISTANCE + 1;
+        function checkIfInGenerics(row, elem, maxLevDistance) {
+            let lev = maxLevDistance + 1;
             for (const entry of row.generics) {
-                lev = Math.min(checkType(entry, elem, true), lev);
+                lev = Math.min(checkType(entry, elem, true, maxLevDistance), lev);
                 if (lev === 0) {
                     break;
                 }
@@ -983,15 +1053,15 @@ function initSearch(rawSearchIndex) {
           * @param {boolean} literalSearch
           *
           * @return {integer} - Returns a Levenshtein distance to the best match. If there is
-          *                     no match, returns `MAX_LEV_DISTANCE + 1`.
+          *                     no match, returns `maxLevDistance + 1`.
           */
-        function checkType(row, elem, literalSearch) {
+        function checkType(row, elem, literalSearch, maxLevDistance) {
             if (row.name === null) {
                 // This is a pure "generic" search, no need to run other checks.
                 if (row.generics.length > 0) {
-                    return checkIfInGenerics(row, elem);
+                    return checkIfInGenerics(row, elem, maxLevDistance);
                 }
-                return MAX_LEV_DISTANCE + 1;
+                return maxLevDistance + 1;
             }
 
             let lev = levenshtein(row.name, elem.name);
@@ -1005,9 +1075,9 @@ function initSearch(rawSearchIndex) {
                             return 0;
                         }
                     }
-                    return MAX_LEV_DISTANCE + 1;
+                    return maxLevDistance + 1;
                 } else if (elem.generics.length > 0) {
-                    return checkGenerics(row, elem, MAX_LEV_DISTANCE + 1);
+                    return checkGenerics(row, elem, maxLevDistance + 1, maxLevDistance);
                 }
                 return 0;
             } else if (row.generics.length > 0) {
@@ -1017,22 +1087,20 @@ function initSearch(rawSearchIndex) {
                     }
                     // The name didn't match so we now check if the type we're looking for is inside
                     // the generics!
-                    lev = checkIfInGenerics(row, elem);
-                    // Now whatever happens, the returned distance is "less good" so we should mark
-                    // it as such, and so we add 0.5 to the distance to make it "less good".
-                    return lev + 0.5;
-                } else if (lev > MAX_LEV_DISTANCE) {
+                    lev = Math.min(lev, checkIfInGenerics(row, elem, maxLevDistance));
+                    return lev;
+                } else if (lev > maxLevDistance) {
                     // So our item's name doesn't match at all and has generics.
                     //
                     // Maybe it's present in a sub generic? For example "f<A<B<C>>>()", if we're
                     // looking for "B<C>", we'll need to go down.
-                    return checkIfInGenerics(row, elem);
+                    return checkIfInGenerics(row, elem, maxLevDistance);
                 } else {
                     // At this point, the name kinda match and we have generics to check, so
                     // let's go!
-                    const tmp_lev = checkGenerics(row, elem, lev);
-                    if (tmp_lev > MAX_LEV_DISTANCE) {
-                        return MAX_LEV_DISTANCE + 1;
+                    const tmp_lev = checkGenerics(row, elem, lev, maxLevDistance);
+                    if (tmp_lev > maxLevDistance) {
+                        return maxLevDistance + 1;
                     }
                     // We compute the median value of both checks and return it.
                     return (tmp_lev + lev) / 2;
@@ -1040,7 +1108,7 @@ function initSearch(rawSearchIndex) {
             } else if (elem.generics.length > 0) {
                 // In this case, we were expecting generics but there isn't so we simply reject this
                 // one.
-                return MAX_LEV_DISTANCE + 1;
+                return maxLevDistance + 1;
             }
             // No generics on our query or on the target type so we can return without doing
             // anything else.
@@ -1055,23 +1123,26 @@ function initSearch(rawSearchIndex) {
          * @param {integer} typeFilter
          *
          * @return {integer} - Returns a Levenshtein distance to the best match. If there is no
-         *                      match, returns `MAX_LEV_DISTANCE + 1`.
+         *                      match, returns `maxLevDistance + 1`.
          */
-        function findArg(row, elem, typeFilter) {
-            let lev = MAX_LEV_DISTANCE + 1;
+        function findArg(row, elem, typeFilter, maxLevDistance) {
+            let lev = maxLevDistance + 1;
 
             if (row && row.type && row.type.inputs && row.type.inputs.length > 0) {
                 for (const input of row.type.inputs) {
                     if (!typePassesFilter(typeFilter, input.ty)) {
                         continue;
                     }
-                    lev = Math.min(lev, checkType(input, elem, parsedQuery.literalSearch));
+                    lev = Math.min(
+                        lev,
+                        checkType(input, elem, parsedQuery.literalSearch, maxLevDistance)
+                    );
                     if (lev === 0) {
                         return 0;
                     }
                 }
             }
-            return parsedQuery.literalSearch ? MAX_LEV_DISTANCE + 1 : lev;
+            return parsedQuery.literalSearch ? maxLevDistance + 1 : lev;
         }
 
         /**
@@ -1082,10 +1153,10 @@ function initSearch(rawSearchIndex) {
          * @param {integer} typeFilter
          *
          * @return {integer} - Returns a Levenshtein distance to the best match. If there is no
-         *                      match, returns `MAX_LEV_DISTANCE + 1`.
+         *                      match, returns `maxLevDistance + 1`.
          */
-        function checkReturned(row, elem, typeFilter) {
-            let lev = MAX_LEV_DISTANCE + 1;
+        function checkReturned(row, elem, typeFilter, maxLevDistance) {
+            let lev = maxLevDistance + 1;
 
             if (row && row.type && row.type.output.length > 0) {
                 const ret = row.type.output;
@@ -1093,20 +1164,23 @@ function initSearch(rawSearchIndex) {
                     if (!typePassesFilter(typeFilter, ret_ty.ty)) {
                         continue;
                     }
-                    lev = Math.min(lev, checkType(ret_ty, elem, parsedQuery.literalSearch));
+                    lev = Math.min(
+                        lev,
+                        checkType(ret_ty, elem, parsedQuery.literalSearch, maxLevDistance)
+                    );
                     if (lev === 0) {
                         return 0;
                     }
                 }
             }
-            return parsedQuery.literalSearch ? MAX_LEV_DISTANCE + 1 : lev;
+            return parsedQuery.literalSearch ? maxLevDistance + 1 : lev;
         }
 
-        function checkPath(contains, ty) {
+        function checkPath(contains, ty, maxLevDistance) {
             if (contains.length === 0) {
                 return 0;
             }
-            let ret_lev = MAX_LEV_DISTANCE + 1;
+            let ret_lev = maxLevDistance + 1;
             const path = ty.path.split("::");
 
             if (ty.parent && ty.parent.name) {
@@ -1116,7 +1190,7 @@ function initSearch(rawSearchIndex) {
             const length = path.length;
             const clength = contains.length;
             if (clength > length) {
-                return MAX_LEV_DISTANCE + 1;
+                return maxLevDistance + 1;
             }
             for (let i = 0; i < length; ++i) {
                 if (i + clength > length) {
@@ -1126,7 +1200,7 @@ function initSearch(rawSearchIndex) {
                 let aborted = false;
                 for (let x = 0; x < clength; ++x) {
                     const lev = levenshtein(path[i + x], contains[x]);
-                    if (lev > MAX_LEV_DISTANCE) {
+                    if (lev > maxLevDistance) {
                         aborted = true;
                         break;
                     }
@@ -1231,7 +1305,7 @@ function initSearch(rawSearchIndex) {
          * following condition:
          *
          * * If it is a "literal search" (`parsedQuery.literalSearch`), then `lev` must be 0.
-         * * If it is not a "literal search", `lev` must be <= `MAX_LEV_DISTANCE`.
+         * * If it is not a "literal search", `lev` must be <= `maxLevDistance`.
          *
          * The `results` map contains information which will be used to sort the search results:
          *
@@ -1249,8 +1323,8 @@ function initSearch(rawSearchIndex) {
          * @param {integer} lev
          * @param {integer} path_lev
          */
-        function addIntoResults(results, fullId, id, index, lev, path_lev) {
-            const inBounds = lev <= MAX_LEV_DISTANCE || index !== -1;
+        function addIntoResults(results, fullId, id, index, lev, path_lev, maxLevDistance) {
+            const inBounds = lev <= maxLevDistance || index !== -1;
             if (lev === 0 || (!parsedQuery.literalSearch && inBounds)) {
                 if (results[fullId] !== undefined) {
                     const result = results[fullId];
@@ -1289,7 +1363,8 @@ function initSearch(rawSearchIndex) {
             elem,
             results_others,
             results_in_args,
-            results_returned
+            results_returned,
+            maxLevDistance
         ) {
             if (!row || (filterCrates !== null && row.crate !== filterCrates)) {
                 return;
@@ -1298,13 +1373,13 @@ function initSearch(rawSearchIndex) {
             const fullId = row.id;
             const searchWord = searchWords[pos];
 
-            const in_args = findArg(row, elem, parsedQuery.typeFilter);
-            const returned = checkReturned(row, elem, parsedQuery.typeFilter);
+            const in_args = findArg(row, elem, parsedQuery.typeFilter, maxLevDistance);
+            const returned = checkReturned(row, elem, parsedQuery.typeFilter, maxLevDistance);
 
             // path_lev is 0 because no parent path information is currently stored
             // in the search index
-            addIntoResults(results_in_args, fullId, pos, -1, in_args, 0);
-            addIntoResults(results_returned, fullId, pos, -1, returned, 0);
+            addIntoResults(results_in_args, fullId, pos, -1, in_args, 0, maxLevDistance);
+            addIntoResults(results_returned, fullId, pos, -1, returned, 0, maxLevDistance);
 
             if (!typePassesFilter(parsedQuery.typeFilter, row.ty)) {
                 return;
@@ -1328,16 +1403,16 @@ function initSearch(rawSearchIndex) {
             // No need to check anything else if it's a "pure" generics search.
             if (elem.name.length === 0) {
                 if (row.type !== null) {
-                    lev = checkGenerics(row.type, elem, MAX_LEV_DISTANCE + 1);
+                    lev = checkGenerics(row.type, elem, maxLevDistance + 1, maxLevDistance);
                     // path_lev is 0 because we know it's empty
-                    addIntoResults(results_others, fullId, pos, index, lev, 0);
+                    addIntoResults(results_others, fullId, pos, index, lev, 0, maxLevDistance);
                 }
                 return;
             }
 
             if (elem.fullPath.length > 1) {
-                path_lev = checkPath(elem.pathWithoutLast, row);
-                if (path_lev > MAX_LEV_DISTANCE) {
+                path_lev = checkPath(elem.pathWithoutLast, row, maxLevDistance);
+                if (path_lev > maxLevDistance) {
                     return;
                 }
             }
@@ -1351,11 +1426,11 @@ function initSearch(rawSearchIndex) {
 
             lev = levenshtein(searchWord, elem.pathLast);
 
-            if (index === -1 && lev + path_lev > MAX_LEV_DISTANCE) {
+            if (index === -1 && lev + path_lev > maxLevDistance) {
                 return;
             }
 
-            addIntoResults(results_others, fullId, pos, index, lev, path_lev);
+            addIntoResults(results_others, fullId, pos, index, lev, path_lev, maxLevDistance);
         }
 
         /**
@@ -1367,7 +1442,7 @@ function initSearch(rawSearchIndex) {
          * @param {integer} pos      - Position in the `searchIndex`.
          * @param {Object} results
          */
-        function handleArgs(row, pos, results) {
+        function handleArgs(row, pos, results, maxLevDistance) {
             if (!row || (filterCrates !== null && row.crate !== filterCrates)) {
                 return;
             }
@@ -1379,7 +1454,7 @@ function initSearch(rawSearchIndex) {
             function checkArgs(elems, callback) {
                 for (const elem of elems) {
                     // There is more than one parameter to the query so all checks should be "exact"
-                    const lev = callback(row, elem, NO_TYPE_FILTER);
+                    const lev = callback(row, elem, NO_TYPE_FILTER, maxLevDistance);
                     if (lev <= 1) {
                         nbLev += 1;
                         totalLev += lev;
@@ -1400,12 +1475,21 @@ function initSearch(rawSearchIndex) {
                 return;
             }
             const lev = Math.round(totalLev / nbLev);
-            addIntoResults(results, row.id, pos, 0, lev, 0);
+            addIntoResults(results, row.id, pos, 0, lev, 0, maxLevDistance);
         }
 
         function innerRunQuery() {
             let elem, i, nSearchWords, in_returned, row;
 
+            let queryLen = 0;
+            for (const elem of parsedQuery.elems) {
+                queryLen += elem.name.length;
+            }
+            for (const elem of parsedQuery.returned) {
+                queryLen += elem.name.length;
+            }
+            const maxLevDistance = Math.floor(queryLen / 3);
+
             if (parsedQuery.foundElems === 1) {
                 if (parsedQuery.elems.length === 1) {
                     elem = parsedQuery.elems[0];
@@ -1418,7 +1502,8 @@ function initSearch(rawSearchIndex) {
                             elem,
                             results_others,
                             results_in_args,
-                            results_returned
+                            results_returned,
+                            maxLevDistance
                         );
                     }
                 } else if (parsedQuery.returned.length === 1) {
@@ -1426,13 +1511,18 @@ function initSearch(rawSearchIndex) {
                     elem = parsedQuery.returned[0];
                     for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) {
                         row = searchIndex[i];
-                        in_returned = checkReturned(row, elem, parsedQuery.typeFilter);
-                        addIntoResults(results_others, row.id, i, -1, in_returned);
+                        in_returned = checkReturned(
+                            row,
+                            elem,
+                            parsedQuery.typeFilter,
+                            maxLevDistance
+                        );
+                        addIntoResults(results_others, row.id, i, -1, in_returned, maxLevDistance);
                     }
                 }
             } else if (parsedQuery.foundElems > 0) {
                 for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) {
-                    handleArgs(searchIndex[i], i, results_others);
+                    handleArgs(searchIndex[i], i, results_others, maxLevDistance);
                 }
             }
         }
@@ -1470,7 +1560,7 @@ function initSearch(rawSearchIndex) {
      *
      * @return {boolean}       - Whether the result is valid or not
      */
-    function validateResult(name, path, keys, parent) {
+    function validateResult(name, path, keys, parent, maxLevDistance) {
         if (!keys || !keys.length) {
             return true;
         }
@@ -1485,7 +1575,7 @@ function initSearch(rawSearchIndex) {
                 (parent !== undefined && parent.name !== undefined &&
                     parent.name.toLowerCase().indexOf(key) > -1) ||
                 // lastly check to see if the name was a levenshtein match
-                levenshtein(name, key) <= MAX_LEV_DISTANCE)) {
+                levenshtein(name, key) <= maxLevDistance)) {
                 return false;
             }
         }
@@ -1725,7 +1815,16 @@ function initSearch(rawSearchIndex) {
 
         let output = `<h1 class="search-results-title">Results${crates}</h1>`;
         if (results.query.error !== null) {
-            output += `<h3>Query parser error: "${results.query.error}".</h3>`;
+            const error = results.query.error;
+            error.forEach((value, index) => {
+                value = value.split("<").join("&lt;").split(">").join("&gt;");
+                if (index % 2 !== 0) {
+                    error[index] = `<code>${value}</code>`;
+                } else {
+                    error[index] = value;
+                }
+            });
+            output += `<h3 class="error">Query parser error: "${error.join("")}".</h3>`;
             output += "<div id=\"search-tabs\">" +
                 makeTabHeader(0, "In Names", ret_others[1]) +
                 "</div>";
@@ -1922,7 +2021,7 @@ function initSearch(rawSearchIndex) {
          * @type {Array<string>}
          */
         const searchWords = [];
-        let i, word;
+        const charA = "A".charCodeAt(0);
         let currentIndex = 0;
         let id = 0;
 
@@ -1936,7 +2035,7 @@ function initSearch(rawSearchIndex) {
             /**
              * The raw search data for a given crate. `n`, `t`, `d`, and `q`, `i`, and `f`
              * are arrays with the same length. n[i] contains the name of an item.
-             * t[i] contains the type of that item (as a small integer that represents an
+             * t[i] contains the type of that item (as a string of characters that represent an
              * offset in `itemTypes`). d[i] contains the description of that item.
              *
              * q[i] contains the full path of the item, or an empty string indicating
@@ -1963,7 +2062,7 @@ function initSearch(rawSearchIndex) {
              *   doc: string,
              *   a: Object,
              *   n: Array<string>,
-             *   t: Array<Number>,
+             *   t: String,
              *   d: Array<string>,
              *   q: Array<string>,
              *   i: Array<Number>,
@@ -1992,7 +2091,7 @@ function initSearch(rawSearchIndex) {
             searchIndex.push(crateRow);
             currentIndex += 1;
 
-            // an array of (Number) item types
+            // a String of one character item type codes
             const itemTypes = crateCorpus.t;
             // an array of (String) item names
             const itemNames = crateCorpus.n;
@@ -2017,7 +2116,7 @@ function initSearch(rawSearchIndex) {
             // convert `rawPaths` entries into object form
             // generate normalizedPaths for function search mode
             let len = paths.length;
-            for (i = 0; i < len; ++i) {
+            for (let i = 0; i < len; ++i) {
                 lowercasePaths.push({ty: paths[i][0], name: paths[i][1].toLowerCase()});
                 paths[i] = {ty: paths[i][0], name: paths[i][1]};
             }
@@ -2031,19 +2130,17 @@ function initSearch(rawSearchIndex) {
             // faster analysis operations
             len = itemTypes.length;
             let lastPath = "";
-            for (i = 0; i < len; ++i) {
+            for (let i = 0; i < len; ++i) {
+                let word = "";
                 // This object should have exactly the same set of fields as the "crateRow"
                 // object defined above.
                 if (typeof itemNames[i] === "string") {
                     word = itemNames[i].toLowerCase();
-                    searchWords.push(word);
-                } else {
-                    word = "";
-                    searchWords.push("");
                 }
+                searchWords.push(word);
                 const row = {
                     crate: crate,
-                    ty: itemTypes[i],
+                    ty: itemTypes.charCodeAt(i) - charA,
                     name: itemNames[i],
                     path: itemPaths[i] ? itemPaths[i] : lastPath,
                     desc: itemDescs[i],
diff --git a/src/librustdoc/html/static/js/settings.js b/src/librustdoc/html/static/js/settings.js
index 84df1b7d3..1cd552e7f 100644
--- a/src/librustdoc/html/static/js/settings.js
+++ b/src/librustdoc/html/static/js/settings.js
@@ -1,5 +1,5 @@
 // Local js definitions:
-/* global getSettingValue, getVirtualKey, updateLocalStorage, updateSystemTheme */
+/* global getSettingValue, getVirtualKey, updateLocalStorage, updateTheme */
 /* global addClass, removeClass, onEach, onEachLazy, blurHandler, elemIsInParent */
 /* global MAIN_ID, getVar, getSettingsButton */
 
@@ -19,7 +19,7 @@
             case "theme":
             case "preferred-dark-theme":
             case "preferred-light-theme":
-                updateSystemTheme();
+                updateTheme();
                 updateLightAndDark();
                 break;
             case "line-numbers":
@@ -48,13 +48,13 @@
     }
 
     function showLightAndDark() {
-        removeClass(document.getElementById("preferred-light-theme").parentElement, "hidden");
-        removeClass(document.getElementById("preferred-dark-theme").parentElement, "hidden");
+        removeClass(document.getElementById("preferred-light-theme"), "hidden");
+        removeClass(document.getElementById("preferred-dark-theme"), "hidden");
     }
 
     function hideLightAndDark() {
-        addClass(document.getElementById("preferred-light-theme").parentElement, "hidden");
-        addClass(document.getElementById("preferred-dark-theme").parentElement, "hidden");
+        addClass(document.getElementById("preferred-light-theme"), "hidden");
+        addClass(document.getElementById("preferred-dark-theme"), "hidden");
     }
 
     function updateLightAndDark() {
@@ -80,17 +80,6 @@
             toggle.onkeyup = handleKey;
             toggle.onkeyrelease = handleKey;
         });
-        onEachLazy(settingsElement.getElementsByClassName("select-wrapper"), elem => {
-            const select = elem.getElementsByTagName("select")[0];
-            const settingId = select.id;
-            const settingValue = getSettingValue(settingId);
-            if (settingValue !== null) {
-                select.value = settingValue;
-            }
-            select.onchange = function() {
-                changeSetting(this.id, this.value);
-            };
-        });
         onEachLazy(settingsElement.querySelectorAll("input[type=\"radio\"]"), elem => {
             const settingId = elem.name;
             let settingValue = getSettingValue(settingId);
@@ -127,38 +116,40 @@
         let output = "";
 
         for (const setting of settings) {
-            output += "<div class=\"setting-line\">";
             const js_data_name = setting["js_name"];
             const setting_name = setting["name"];
 
             if (setting["options"] !== undefined) {
                 // This is a select setting.
                 output += `\
-<div class="radio-line" id="${js_data_name}">
-    <div class="setting-name">${setting_name}</div>
-<div class="choices">`;
+<div class="setting-line" id="${js_data_name}">
+    <div class="setting-radio-name">${setting_name}</div>
+    <div class="setting-radio-choices">`;
                 onEach(setting["options"], option => {
                     const checked = option === setting["default"] ? " checked" : "";
                     const full = `${js_data_name}-${option.replace(/ /g,"-")}`;
 
                     output += `\
-<label for="${full}" class="choice">
-    <input type="radio" name="${js_data_name}"
-        id="${full}" value="${option}"${checked}>
-    <span>${option}</span>
-</label>`;
+        <label for="${full}" class="setting-radio">
+            <input type="radio" name="${js_data_name}"
+                id="${full}" value="${option}"${checked}>
+            <span>${option}</span>
+        </label>`;
                 });
-                output += "</div></div>";
+                output += `\
+    </div>
+</div>`;
             } else {
                 // This is a checkbox toggle.
                 const checked = setting["default"] === true ? " checked" : "";
                 output += `\
-<label class="settings-toggle">\
-    <input type="checkbox" id="${js_data_name}"${checked}>\
-    <span class="label">${setting_name}</span>\
-</label>`;
+<div class="setting-line">\
+    <label class="setting-check">\
+        <input type="checkbox" id="${js_data_name}"${checked}>\
+        <span>${setting_name}</span>\
+    </label>\
+</div>`;
             }
-            output += "</div>";
         }
         return output;
     }
diff --git a/src/librustdoc/html/static/js/source-script.js b/src/librustdoc/html/static/js/source-script.js
index 0e1c864e6..6c0f03b5b 100644
--- a/src/librustdoc/html/static/js/source-script.js
+++ b/src/librustdoc/html/static/js/source-script.js
@@ -117,8 +117,7 @@ function createSourceSidebar() {
     sidebar.appendChild(title);
     Object.keys(sourcesIndex).forEach(key => {
         sourcesIndex[key][NAME_OFFSET] = key;
-        hasFoundFile = createDirEntry(sourcesIndex[key], sidebar, "",
-            hasFoundFile);
+        hasFoundFile = createDirEntry(sourcesIndex[key], sidebar, "", hasFoundFile);
     });
 
     container.appendChild(sidebar);
diff --git a/src/librustdoc/html/static/js/storage.js b/src/librustdoc/html/static/js/storage.js
index db2db83ca..c72ac254f 100644
--- a/src/librustdoc/html/static/js/storage.js
+++ b/src/librustdoc/html/static/js/storage.js
@@ -51,7 +51,6 @@ function hasClass(elem, className) {
     return elem && elem.classList && elem.classList.contains(className);
 }
 
-// eslint-disable-next-line no-unused-vars
 function addClass(elem, className) {
     if (!elem || !elem.classList) {
         return;
@@ -153,79 +152,74 @@ function switchTheme(styleElem, mainStyleElem, newThemeName, saveTheme) {
     }
 }
 
-// This function is called from "main.js".
-// eslint-disable-next-line no-unused-vars
-function useSystemTheme(value) {
-    if (value === undefined) {
-        value = true;
-    }
-
-    updateLocalStorage("use-system-theme", value);
-
-    // update the toggle if we're on the settings page
-    const toggle = document.getElementById("use-system-theme");
-    if (toggle && toggle instanceof HTMLInputElement) {
-        toggle.checked = value;
-    }
-}
-
-const updateSystemTheme = (function() {
-    if (!window.matchMedia) {
-        // fallback to the CSS computed value
-        return () => {
-            const cssTheme = getComputedStyle(document.documentElement)
-                .getPropertyValue("content");
-
-            switchTheme(
-                window.currentTheme,
-                window.mainTheme,
-                JSON.parse(cssTheme) || "light",
-                true
-            );
+const updateTheme = (function() {
+    /**
+     * Update the current theme to match whatever the current combination of
+     * * the preference for using the system theme
+     *   (if this is the case, the value of preferred-light-theme, if the
+     *   system theme is light, otherwise if dark, the value of
+     *   preferred-dark-theme.)
+     * * the preferred theme
+     * … dictates that it should be.
+     */
+    function updateTheme() {
+        const use = (theme, saveTheme) => {
+            switchTheme(window.currentTheme, window.mainTheme, theme, saveTheme);
         };
-    }
-
-    // only listen to (prefers-color-scheme: dark) because light is the default
-    const mql = window.matchMedia("(prefers-color-scheme: dark)");
 
-    function handlePreferenceChange(mql) {
-        const use = theme => {
-            switchTheme(window.currentTheme, window.mainTheme, theme, true);
-        };
         // maybe the user has disabled the setting in the meantime!
         if (getSettingValue("use-system-theme") !== "false") {
             const lightTheme = getSettingValue("preferred-light-theme") || "light";
             const darkTheme = getSettingValue("preferred-dark-theme") || "dark";
 
-            if (mql.matches) {
-                use(darkTheme);
+            if (isDarkMode()) {
+                use(darkTheme, true);
             } else {
                 // prefers a light theme, or has no preference
-                use(lightTheme);
+                use(lightTheme, true);
             }
             // note: we save the theme so that it doesn't suddenly change when
             // the user disables "use-system-theme" and reloads the page or
             // navigates to another page
         } else {
-            use(getSettingValue("theme"));
+            use(getSettingValue("theme"), false);
         }
     }
 
-    mql.addListener(handlePreferenceChange);
+    // This is always updated below to a function () => bool.
+    let isDarkMode;
 
-    return () => {
-        handlePreferenceChange(mql);
-    };
-})();
+    // Determine the function for isDarkMode, and if we have
+    // `window.matchMedia`, set up an event listener on the preferred color
+    // scheme.
+    //
+    // Otherwise, fall back to the prefers-color-scheme value CSS captured in
+    // the "content" property.
+    if (window.matchMedia) {
+        // only listen to (prefers-color-scheme: dark) because light is the default
+        const mql = window.matchMedia("(prefers-color-scheme: dark)");
 
-function switchToSavedTheme() {
-    switchTheme(
-        window.currentTheme,
-        window.mainTheme,
-        getSettingValue("theme") || "light",
-        false
-    );
-}
+        isDarkMode = () => mql.matches;
+
+        if (mql.addEventListener) {
+            mql.addEventListener("change", updateTheme);
+        } else {
+            // This is deprecated, see:
+            // https://developer.mozilla.org/en-US/docs/Web/API/MediaQueryList/addListener
+            mql.addListener(updateTheme);
+        }
+    } else {
+        // fallback to the CSS computed value
+        const cssContent = getComputedStyle(document.documentElement)
+            .getPropertyValue("content");
+        // (Note: the double-quotes come from that this is a CSS value, which
+        // might be a length, string, etc.)
+        const cssColorScheme = cssContent || "\"light\"";
+        isDarkMode = () => (cssColorScheme === "\"dark\"");
+    }
+
+    return updateTheme;
+})();
 
 if (getSettingValue("use-system-theme") !== "false" && window.matchMedia) {
     // update the preferred dark theme if the user is already using a dark theme
@@ -235,13 +229,10 @@ if (getSettingValue("use-system-theme") !== "false" && window.matchMedia) {
         && darkThemes.indexOf(localStoredTheme) >= 0) {
         updateLocalStorage("preferred-dark-theme", localStoredTheme);
     }
-
-    // call the function to initialize the theme at least once!
-    updateSystemTheme();
-} else {
-    switchToSavedTheme();
 }
 
+updateTheme();
+
 if (getSettingValue("source-sidebar-show") === "true") {
     // At this point in page load, `document.body` is not available yet.
     // Set a class on the `<html>` element instead.
@@ -259,6 +250,6 @@ if (getSettingValue("source-sidebar-show") === "true") {
 // specifically when talking to a remote website with no caching.
 window.addEventListener("pageshow", ev => {
     if (ev.persisted) {
-        setTimeout(switchToSavedTheme, 0);
+        setTimeout(updateTheme, 0);
     }
 });
diff --git a/src/librustdoc/html/static_files.rs b/src/librustdoc/html/static_files.rs
index b48b82307..767b974cc 100644
--- a/src/librustdoc/html/static_files.rs
+++ b/src/librustdoc/html/static_files.rs
@@ -102,9 +102,6 @@ static_files! {
     scrape_examples_js => "static/js/scrape-examples.js",
     wheel_svg => "static/images/wheel.svg",
     clipboard_svg => "static/images/clipboard.svg",
-    down_arrow_svg => "static/images/down-arrow.svg",
-    toggle_minus_png => "static/images/toggle-minus.svg",
-    toggle_plus_png => "static/images/toggle-plus.svg",
     copyright => "static/COPYRIGHT.txt",
     license_apache => "static/LICENSE-APACHE.txt",
     license_mit => "static/LICENSE-MIT.txt",
diff --git a/src/librustdoc/html/templates/page.html b/src/librustdoc/html/templates/page.html
index fddda293b..7690d8f25 100644
--- a/src/librustdoc/html/templates/page.html
+++ b/src/librustdoc/html/templates/page.html
@@ -5,7 +5,6 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0"> {#- -#}
     <meta name="generator" content="rustdoc"> {#- -#}
     <meta name="description" content="{{page.description}}"> {#- -#}
-    <meta name="keywords" content="{{page.keywords}}"> {#- -#}
     <title>{{page.title}}</title> {#- -#}
     <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_serif_4_regular}}"> {#- -#}
     <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.fira_sans_regular}}"> {#- -#}
@@ -24,11 +23,13 @@
     {%- for theme in themes -%}
         <link rel="stylesheet" disabled href="{{page.root_path|safe}}{{theme}}{{page.resource_suffix}}.css"> {#- -#}
     {%- endfor -%}
+    {%- if !layout.default_settings.is_empty() -%}
     <script id="default-settings" {# -#}
       {% for (k, v) in layout.default_settings %}
         data-{{k}}="{{v}}"
       {%- endfor -%}
     ></script> {#- -#}
+    {%- endif -%}
     <script src="{{static_root_path|safe}}{{files.storage_js}}"></script> {#- -#}
     {%- if page.css_class.contains("crate") -%}
     <script defer src="{{page.root_path|safe}}crates{{page.resource_suffix}}.js"></script> {#- -#}
diff --git a/src/librustdoc/html/templates/print_item.html b/src/librustdoc/html/templates/print_item.html
index ee2880bf6..3a1867b7f 100644
--- a/src/librustdoc/html/templates/print_item.html
+++ b/src/librustdoc/html/templates/print_item.html
@@ -6,7 +6,7 @@
         <a href="{{component.path|safe}}index.html">{{component.name}}</a>::<wbr>
         {%- endfor -%}
         <a class="{{item_type}}" href="#">{{name}}</a> {#- -#}
-        <button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"> {#- -#}
+        <button id="copy-path" title="Copy item path to clipboard"> {#- -#}
         <img src="{{static_root_path|safe}}{{clipboard_svg}}" {# -#}
                 width="19" height="18" {# -#}
                 alt="Copy item path"> {#- -#}
diff --git a/src/librustdoc/json/conversions.rs b/src/librustdoc/json/conversions.rs
index bd95ec186..18c45fd69 100644
--- a/src/librustdoc/json/conversions.rs
+++ b/src/librustdoc/json/conversions.rs
@@ -38,7 +38,7 @@ impl JsonRenderer<'_> {
                     Some(UrlFragment::UserWritten(_)) | None => *page_id,
                 };
 
-                (link.clone(), from_item_id(id.into(), self.tcx))
+                (String::from(&**link), id_from_item_default(id.into(), self.tcx))
             })
             .collect();
         let docs = item.attrs.collapsed_doc_value();
@@ -50,7 +50,8 @@ impl JsonRenderer<'_> {
             .collect();
         let span = item.span(self.tcx);
         let visibility = item.visibility(self.tcx);
-        let clean::Item { name, attrs: _, kind: _, item_id, cfg: _, .. } = item;
+        let clean::Item { name, item_id, .. } = item;
+        let id = id_from_item(&item, self.tcx);
         let inner = match *item.kind {
             clean::KeywordItem => return None,
             clean::StrippedItem(ref inner) => {
@@ -69,7 +70,7 @@ impl JsonRenderer<'_> {
             _ => from_clean_item(item, self.tcx),
         };
         Some(Item {
-            id: from_item_id_with_name(item_id, self.tcx, name),
+            id,
             crate_id: item_id.krate().as_u32(),
             name: name.map(|sym| sym.to_string()),
             span: span.and_then(|span| self.convert_span(span)),
@@ -107,7 +108,7 @@ impl JsonRenderer<'_> {
             Some(ty::Visibility::Public) => Visibility::Public,
             Some(ty::Visibility::Restricted(did)) if did.is_crate_root() => Visibility::Crate,
             Some(ty::Visibility::Restricted(did)) => Visibility::Restricted {
-                parent: from_item_id(did.into(), self.tcx),
+                parent: id_from_item_default(did.into(), self.tcx),
                 path: self.tcx.def_path(did).to_string_no_crate_verbose(),
             },
         }
@@ -204,21 +205,42 @@ impl FromWithTcx<clean::TypeBindingKind> for TypeBindingKind {
     }
 }
 
-/// It generates an ID as follows:
-///
-/// `CRATE_ID:ITEM_ID[:NAME_ID]` (if there is no name, NAME_ID is not generated).
-pub(crate) fn from_item_id(item_id: ItemId, tcx: TyCtxt<'_>) -> Id {
-    from_item_id_with_name(item_id, tcx, None)
+#[inline]
+pub(crate) fn id_from_item_default(item_id: ItemId, tcx: TyCtxt<'_>) -> Id {
+    id_from_item_inner(item_id, tcx, None, None)
 }
 
-// FIXME: this function (and appending the name at the end of the ID) should be removed when
-// reexports are not inlined anymore for json format. It should be done in #93518.
-pub(crate) fn from_item_id_with_name(item_id: ItemId, tcx: TyCtxt<'_>, name: Option<Symbol>) -> Id {
-    struct DisplayDefId<'a>(DefId, TyCtxt<'a>, Option<Symbol>);
+/// It generates an ID as follows:
+///
+/// `CRATE_ID:ITEM_ID[:NAME_ID][-EXTRA]`:
+///   * If there is no `name`, `NAME_ID` is not generated.
+///   * If there is no `extra`, `EXTRA` is not generated.
+///
+/// * `name` is the item's name if available (it's not for impl blocks for example).
+/// * `extra` is used for reexports: it contains the ID of the reexported item. It is used to allow
+///   to have items with the same name but different types to both appear in the generated JSON.
+pub(crate) fn id_from_item_inner(
+    item_id: ItemId,
+    tcx: TyCtxt<'_>,
+    name: Option<Symbol>,
+    extra: Option<&Id>,
+) -> Id {
+    struct DisplayDefId<'a, 'b>(DefId, TyCtxt<'a>, Option<&'b Id>, Option<Symbol>);
 
-    impl<'a> fmt::Display for DisplayDefId<'a> {
+    impl<'a, 'b> fmt::Display for DisplayDefId<'a, 'b> {
         fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-            let DisplayDefId(def_id, tcx, name) = self;
+            let DisplayDefId(def_id, tcx, extra, name) = self;
+            // We need this workaround because primitive types' DefId actually refers to
+            // their parent module, which isn't present in the output JSON items. So
+            // instead, we directly get the primitive symbol and convert it to u32 to
+            // generate the ID.
+            let s;
+            let extra = if let Some(e) = extra {
+                s = format!("-{}", e.0);
+                &s
+            } else {
+                ""
+            };
             let name = match name {
                 Some(name) => format!(":{}", name.as_u32()),
                 None => {
@@ -240,18 +262,33 @@ pub(crate) fn from_item_id_with_name(item_id: ItemId, tcx: TyCtxt<'_>, name: Opt
                     }
                 }
             };
-            write!(f, "{}:{}{}", self.0.krate.as_u32(), u32::from(self.0.index), name)
+            write!(f, "{}:{}{name}{extra}", def_id.krate.as_u32(), u32::from(def_id.index))
         }
     }
 
     match item_id {
-        ItemId::DefId(did) => Id(format!("{}", DisplayDefId(did, tcx, name))),
-        ItemId::Blanket { for_, impl_id } => {
-            Id(format!("b:{}-{}", DisplayDefId(impl_id, tcx, None), DisplayDefId(for_, tcx, name)))
-        }
-        ItemId::Auto { for_, trait_ } => {
-            Id(format!("a:{}-{}", DisplayDefId(trait_, tcx, None), DisplayDefId(for_, tcx, name)))
+        ItemId::DefId(did) => Id(format!("{}", DisplayDefId(did, tcx, extra, name))),
+        ItemId::Blanket { for_, impl_id } => Id(format!(
+            "b:{}-{}",
+            DisplayDefId(impl_id, tcx, None, None),
+            DisplayDefId(for_, tcx, extra, name)
+        )),
+        ItemId::Auto { for_, trait_ } => Id(format!(
+            "a:{}-{}",
+            DisplayDefId(trait_, tcx, None, None),
+            DisplayDefId(for_, tcx, extra, name)
+        )),
+    }
+}
+
+pub(crate) fn id_from_item(item: &clean::Item, tcx: TyCtxt<'_>) -> Id {
+    match *item.kind {
+        clean::ItemKind::ImportItem(ref import) => {
+            let extra =
+                import.source.did.map(ItemId::from).map(|i| id_from_item_inner(i, tcx, None, None));
+            id_from_item_inner(item.item_id, tcx, item.name, extra.as_ref())
         }
+        _ => id_from_item_inner(item.item_id, tcx, item.name, None),
     }
 }
 
@@ -525,7 +562,7 @@ impl FromWithTcx<clean::Path> for Path {
     fn from_tcx(path: clean::Path, tcx: TyCtxt<'_>) -> Path {
         Path {
             name: path.whole_name(),
-            id: from_item_id(path.def_id().into(), tcx),
+            id: id_from_item_default(path.def_id().into(), tcx),
             args: path.segments.last().map(|args| Box::new(args.clone().args.into_tcx(tcx))),
         }
     }
@@ -702,7 +739,7 @@ impl FromWithTcx<clean::Import> for Import {
         Import {
             source: import.source.path.whole_name(),
             name,
-            id: import.source.did.map(ItemId::from).map(|i| from_item_id(i, tcx)),
+            id: import.source.did.map(ItemId::from).map(|i| id_from_item_default(i, tcx)),
             glob,
         }
     }
@@ -791,7 +828,7 @@ fn ids(items: impl IntoIterator<Item = clean::Item>, tcx: TyCtxt<'_>) -> Vec<Id>
     items
         .into_iter()
         .filter(|x| !x.is_stripped() && !x.is_keyword())
-        .map(|i| from_item_id_with_name(i.item_id, tcx, i.name))
+        .map(|i| id_from_item(&i, tcx))
         .collect()
 }
 
@@ -801,12 +838,10 @@ fn ids_keeping_stripped(
 ) -> Vec<Option<Id>> {
     items
         .into_iter()
-        .map(|i| {
-            if !i.is_stripped() && !i.is_keyword() {
-                Some(from_item_id_with_name(i.item_id, tcx, i.name))
-            } else {
-                None
-            }
-        })
+        .map(
+            |i| {
+                if !i.is_stripped() && !i.is_keyword() { Some(id_from_item(&i, tcx)) } else { None }
+            },
+        )
         .collect()
 }
diff --git a/src/librustdoc/json/import_finder.rs b/src/librustdoc/json/import_finder.rs
index c5c687df7..982370aa2 100644
--- a/src/librustdoc/json/import_finder.rs
+++ b/src/librustdoc/json/import_finder.rs
@@ -1,5 +1,4 @@
-use rustc_data_structures::fx::FxHashSet;
-use rustc_hir::def_id::DefId;
+use rustc_hir::def_id::DefIdSet;
 
 use crate::{
     clean::{self, Import, ImportSource, Item},
@@ -14,14 +13,15 @@ use crate::{
 /// See [#100973](https://github.com/rust-lang/rust/issues/100973) and
 /// [#101103](https://github.com/rust-lang/rust/issues/101103) for times when
 /// this information is needed.
-pub(crate) fn get_imports(krate: clean::Crate) -> (clean::Crate, FxHashSet<DefId>) {
-    let mut finder = ImportFinder { imported: FxHashSet::default() };
+pub(crate) fn get_imports(krate: clean::Crate) -> (clean::Crate, DefIdSet) {
+    let mut finder = ImportFinder::default();
     let krate = finder.fold_crate(krate);
     (krate, finder.imported)
 }
 
+#[derive(Default)]
 struct ImportFinder {
-    imported: FxHashSet<DefId>,
+    imported: DefIdSet,
 }
 
 impl DocFolder for ImportFinder {
diff --git a/src/librustdoc/json/mod.rs b/src/librustdoc/json/mod.rs
index 1196f944f..08bceb59c 100644
--- a/src/librustdoc/json/mod.rs
+++ b/src/librustdoc/json/mod.rs
@@ -13,8 +13,8 @@ use std::io::{BufWriter, Write};
 use std::path::PathBuf;
 use std::rc::Rc;
 
-use rustc_data_structures::fx::{FxHashMap, FxHashSet};
-use rustc_hir::def_id::DefId;
+use rustc_data_structures::fx::FxHashMap;
+use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
 use rustc_span::def_id::LOCAL_CRATE;
@@ -28,7 +28,7 @@ use crate::docfs::PathError;
 use crate::error::Error;
 use crate::formats::cache::Cache;
 use crate::formats::FormatRenderer;
-use crate::json::conversions::{from_item_id, from_item_id_with_name, IntoWithTcx};
+use crate::json::conversions::{id_from_item, id_from_item_default, IntoWithTcx};
 use crate::{clean, try_err};
 
 #[derive(Clone)]
@@ -40,7 +40,7 @@ pub(crate) struct JsonRenderer<'tcx> {
     /// The directory where the blob will be written to.
     out_path: PathBuf,
     cache: Rc<Cache>,
-    imported_items: FxHashSet<DefId>,
+    imported_items: DefIdSet,
 }
 
 impl<'tcx> JsonRenderer<'tcx> {
@@ -58,7 +58,7 @@ impl<'tcx> JsonRenderer<'tcx> {
                     .map(|i| {
                         let item = &i.impl_item;
                         self.item(item.clone()).unwrap();
-                        from_item_id_with_name(item.item_id, self.tcx, item.name)
+                        id_from_item(&item, self.tcx)
                     })
                     .collect()
             })
@@ -80,17 +80,16 @@ impl<'tcx> JsonRenderer<'tcx> {
                         // document primitive items in an arbitrary crate by using
                         // `doc(primitive)`.
                         let mut is_primitive_impl = false;
-                        if let clean::types::ItemKind::ImplItem(ref impl_) = *item.kind {
-                            if impl_.trait_.is_none() {
-                                if let clean::types::Type::Primitive(_) = impl_.for_ {
-                                    is_primitive_impl = true;
-                                }
-                            }
+                        if let clean::types::ItemKind::ImplItem(ref impl_) = *item.kind &&
+                            impl_.trait_.is_none() &&
+                            let clean::types::Type::Primitive(_) = impl_.for_
+                        {
+                            is_primitive_impl = true;
                         }
 
                         if item.item_id.is_local() || is_primitive_impl {
                             self.item(item.clone()).unwrap();
-                            Some(from_item_id_with_name(item.item_id, self.tcx, item.name))
+                            Some(id_from_item(&item, self.tcx))
                         } else {
                             None
                         }
@@ -151,7 +150,6 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         // Flatten items that recursively store other items
         item.kind.inner_items().for_each(|i| self.item(i.clone()).unwrap());
 
-        let name = item.name;
         let item_id = item.item_id;
         if let Some(mut new_item) = self.convert_item(item) {
             let can_be_ignored = match new_item.inner {
@@ -194,10 +192,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                 | types::ItemEnum::Macro(_)
                 | types::ItemEnum::ProcMacro(_) => false,
             };
-            let removed = self
-                .index
-                .borrow_mut()
-                .insert(from_item_id_with_name(item_id, self.tcx, name), new_item.clone());
+            let removed = self.index.borrow_mut().insert(new_item.id.clone(), new_item.clone());
 
             // FIXME(adotinthevoid): Currently, the index is duplicated. This is a sanity check
             // to make sure the items are unique. The main place this happens is when an item, is
@@ -208,6 +203,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                 if !can_be_ignored {
                     assert_eq!(old_item, new_item);
                 }
+                trace!("replaced {:?}\nwith {:?}", old_item, new_item);
             }
         }
 
@@ -222,7 +218,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
     fn after_krate(&mut self) -> Result<(), Error> {
         debug!("Done with crate");
 
-        debug!("Adding Primitve impls");
+        debug!("Adding Primitive impls");
         for primitive in Rc::clone(&self.cache).primitive_locations.values() {
             self.get_impls(*primitive);
         }
@@ -247,7 +243,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                 .chain(&self.cache.external_paths)
                 .map(|(&k, &(ref path, kind))| {
                     (
-                        from_item_id(k.into(), self.tcx),
+                        id_from_item_default(k.into(), self.tcx),
                         types::ItemSummary {
                             crate_id: k.krate.as_u32(),
                             path: path.iter().map(|s| s.to_string()).collect(),
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 86454e1f2..4fcf08736 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -6,7 +6,6 @@
 #![feature(array_methods)]
 #![feature(assert_matches)]
 #![feature(box_patterns)]
-#![feature(control_flow_enum)]
 #![feature(drain_filter)]
 #![feature(is_terminal)]
 #![feature(let_chains)]
@@ -21,6 +20,7 @@
 #![allow(clippy::collapsible_if, clippy::collapsible_else_if)]
 #![allow(rustc::potential_query_instability)]
 
+extern crate thin_vec;
 #[macro_use]
 extern crate tracing;
 
@@ -32,6 +32,7 @@ extern crate tracing;
 //
 // Dependencies listed in Cargo.toml do not need `extern crate`.
 
+extern crate pulldown_cmark;
 extern crate rustc_ast;
 extern crate rustc_ast_pretty;
 extern crate rustc_attr;
@@ -82,7 +83,6 @@ use rustc_session::getopts;
 use rustc_session::{early_error, early_warn};
 
 use crate::clean::utils::DOC_RUST_LANG_ORG_CHANNEL;
-use crate::passes::collect_intra_doc_links;
 
 /// A macro to create a FxHashMap.
 ///
@@ -742,7 +742,7 @@ fn main_args(at_args: &[String]) -> MainResult {
         (false, true) => {
             let input = options.input.clone();
             let edition = options.edition;
-            let config = core::create_config(options);
+            let config = core::create_config(options, &render_options);
 
             // `markdown::render` can invoke `doctest::make_test`, which
             // requires session globals and a thread pool, so we use
@@ -775,7 +775,7 @@ fn main_args(at_args: &[String]) -> MainResult {
     let scrape_examples_options = options.scrape_examples_options.clone();
     let bin_crate = options.bin_crate;
 
-    let config = core::create_config(options);
+    let config = core::create_config(options, &render_options);
 
     interface::run_compiler(config, |compiler| {
         let sess = compiler.session();
@@ -793,40 +793,14 @@ fn main_args(at_args: &[String]) -> MainResult {
         }
 
         compiler.enter(|queries| {
-            // We need to hold on to the complete resolver, so we cause everything to be
-            // cloned for the analysis passes to use. Suboptimal, but necessary in the
-            // current architecture.
-            // FIXME(#83761): Resolver cloning can lead to inconsistencies between data in the
-            // two copies because one of the copies can be modified after `TyCtxt` construction.
-            let (resolver, resolver_caches) = {
-                let expansion = abort_on_err(queries.expansion(), sess);
-                let (krate, resolver, _) = &*expansion.borrow();
-                let resolver_caches = resolver.borrow_mut().access(|resolver| {
-                    collect_intra_doc_links::early_resolve_intra_doc_links(
-                        resolver,
-                        krate,
-                        render_options.document_private,
-                    )
-                });
-                (resolver.clone(), resolver_caches)
-            };
-
+            let mut gcx = abort_on_err(queries.global_ctxt(), sess);
             if sess.diagnostic().has_errors_or_lint_errors().is_some() {
                 sess.fatal("Compilation failed, aborting rustdoc");
             }
 
-            let global_ctxt = abort_on_err(queries.global_ctxt(), sess);
-
-            global_ctxt.enter(|tcx| {
+            gcx.enter(|tcx| {
                 let (krate, render_opts, mut cache) = sess.time("run_global_ctxt", || {
-                    core::run_global_ctxt(
-                        tcx,
-                        resolver,
-                        resolver_caches,
-                        show_coverage,
-                        render_options,
-                        output_format,
-                    )
+                    core::run_global_ctxt(tcx, show_coverage, render_options, output_format)
                 });
                 info!("finished with rustc");
 
diff --git a/src/librustdoc/lint.rs b/src/librustdoc/lint.rs
index 3aad97bc2..6d289eb99 100644
--- a/src/librustdoc/lint.rs
+++ b/src/librustdoc/lint.rs
@@ -194,7 +194,11 @@ pub(crate) fn register_lints(_sess: &Session, lint_store: &mut LintStore) {
         true,
         "rustdoc::all",
         Some("rustdoc"),
-        RUSTDOC_LINTS.iter().map(|&lint| LintId::of(lint)).collect(),
+        RUSTDOC_LINTS
+            .iter()
+            .filter(|lint| lint.feature_gate.is_none()) // only include stable lints
+            .map(|&lint| LintId::of(lint))
+            .collect(),
     );
     for lint in &*RUSTDOC_LINTS {
         let name = lint.name_lower();
diff --git a/src/librustdoc/markdown.rs b/src/librustdoc/markdown.rs
index 5f4ad6d2a..4321d4aa3 100644
--- a/src/librustdoc/markdown.rs
+++ b/src/librustdoc/markdown.rs
@@ -72,7 +72,14 @@ pub(crate) fn render<P: AsRef<Path>>(
     let mut ids = IdMap::new();
     let error_codes = ErrorCodes::from(options.unstable_features.is_nightly_build());
     let text = if !options.markdown_no_toc {
-        MarkdownWithToc(text, &mut ids, error_codes, edition, &playground).into_string()
+        MarkdownWithToc {
+            content: text,
+            ids: &mut ids,
+            error_codes,
+            edition,
+            playground: &playground,
+        }
+        .into_string()
     } else {
         Markdown {
             content: text,
diff --git a/src/librustdoc/passes/calculate_doc_coverage.rs b/src/librustdoc/passes/calculate_doc_coverage.rs
index 02b227896..0b22f943d 100644
--- a/src/librustdoc/passes/calculate_doc_coverage.rs
+++ b/src/librustdoc/passes/calculate_doc_coverage.rs
@@ -216,13 +216,7 @@ impl<'a, 'b> DocVisitor for CoverageCalculator<'a, 'b> {
                 );
 
                 let has_doc_example = tests.found_tests != 0;
-                // The `expect_def_id()` should be okay because `local_def_id_to_hir_id`
-                // would presumably panic if a fake `DefIndex` were passed.
-                let hir_id = self
-                    .ctx
-                    .tcx
-                    .hir()
-                    .local_def_id_to_hir_id(i.item_id.expect_def_id().expect_local());
+                let hir_id = DocContext::as_local_hir_id(self.ctx.tcx, i.item_id).unwrap();
                 let (level, source) = self.ctx.tcx.lint_level_at_node(MISSING_DOCS, hir_id);
 
                 // In case we have:
diff --git a/src/librustdoc/passes/check_doc_test_visibility.rs b/src/librustdoc/passes/check_doc_test_visibility.rs
index 6aa2dda98..a39d57d42 100644
--- a/src/librustdoc/passes/check_doc_test_visibility.rs
+++ b/src/librustdoc/passes/check_doc_test_visibility.rs
@@ -14,8 +14,8 @@ use crate::visit::DocVisitor;
 use crate::visit_ast::inherits_doc_hidden;
 use rustc_hir as hir;
 use rustc_middle::lint::LintLevelSource;
+use rustc_middle::ty::DefIdTree;
 use rustc_session::lint;
-use rustc_span::symbol::sym;
 
 pub(crate) const CHECK_DOC_TEST_VISIBILITY: Pass = Pass {
     name: "check_doc_test_visibility",
@@ -79,30 +79,32 @@ pub(crate) fn should_have_doc_example(cx: &DocContext<'_>, item: &clean::Item) -
 
     // The `expect_def_id()` should be okay because `local_def_id_to_hir_id`
     // would presumably panic if a fake `DefIndex` were passed.
-    let hir_id = cx.tcx.hir().local_def_id_to_hir_id(item.item_id.expect_def_id().expect_local());
+    let def_id = item.item_id.expect_def_id().expect_local();
 
     // check if parent is trait impl
-    if let Some(parent_hir_id) = cx.tcx.hir().opt_parent_id(hir_id) {
-        if let Some(parent_node) = cx.tcx.hir().find(parent_hir_id) {
-            if matches!(
-                parent_node,
-                hir::Node::Item(hir::Item {
-                    kind: hir::ItemKind::Impl(hir::Impl { of_trait: Some(_), .. }),
-                    ..
-                })
-            ) {
-                return false;
-            }
-        }
+    if let Some(parent_def_id) = cx.tcx.opt_local_parent(def_id) &&
+        let Some(parent_node) = cx.tcx.hir().find_by_def_id(parent_def_id) &&
+        matches!(
+            parent_node,
+            hir::Node::Item(hir::Item {
+                kind: hir::ItemKind::Impl(hir::Impl { of_trait: Some(_), .. }),
+                ..
+            })
+        )
+    {
+        return false;
     }
 
-    if cx.tcx.hir().attrs(hir_id).lists(sym::doc).has_word(sym::hidden)
-        || inherits_doc_hidden(cx.tcx, hir_id)
-        || cx.tcx.hir().span(hir_id).in_derive_expansion()
+    if cx.tcx.is_doc_hidden(def_id.to_def_id())
+        || inherits_doc_hidden(cx.tcx, def_id)
+        || cx.tcx.def_span(def_id.to_def_id()).in_derive_expansion()
     {
         return false;
     }
-    let (level, source) = cx.tcx.lint_level_at_node(crate::lint::MISSING_DOC_CODE_EXAMPLES, hir_id);
+    let (level, source) = cx.tcx.lint_level_at_node(
+        crate::lint::MISSING_DOC_CODE_EXAMPLES,
+        cx.tcx.hir().local_def_id_to_hir_id(def_id),
+    );
     level != lint::Level::Allow || matches!(source, LintLevelSource::Default)
 }
 
diff --git a/src/librustdoc/passes/collect_intra_doc_links.rs b/src/librustdoc/passes/collect_intra_doc_links.rs
index 075951312..cbfc58138 100644
--- a/src/librustdoc/passes/collect_intra_doc_links.rs
+++ b/src/librustdoc/passes/collect_intra_doc_links.rs
@@ -15,7 +15,8 @@ use rustc_hir::def_id::{DefId, CRATE_DEF_ID};
 use rustc_hir::Mutability;
 use rustc_middle::ty::{DefIdTree, Ty, TyCtxt};
 use rustc_middle::{bug, ty};
-use rustc_resolve::ParentScope;
+use rustc_resolve::rustdoc::MalformedGenerics;
+use rustc_resolve::rustdoc::{prepare_to_doc_link_resolution, strip_generics_from_path};
 use rustc_session::lint::Lint;
 use rustc_span::hygiene::MacroKind;
 use rustc_span::symbol::{sym, Ident, Symbol};
@@ -34,9 +35,6 @@ use crate::lint::{BROKEN_INTRA_DOC_LINKS, PRIVATE_INTRA_DOC_LINKS};
 use crate::passes::Pass;
 use crate::visit::DocVisitor;
 
-mod early;
-pub(crate) use early::early_resolve_intra_doc_links;
-
 pub(crate) const COLLECT_INTRA_DOC_LINKS: Pass = Pass {
     name: "collect-intra-doc-links",
     run: collect_intra_doc_links,
@@ -179,47 +177,6 @@ enum ResolutionFailure<'a> {
     NotResolved(UnresolvedPath<'a>),
 }
 
-#[derive(Clone, Copy, Debug)]
-enum MalformedGenerics {
-    /// This link has unbalanced angle brackets.
-    ///
-    /// For example, `Vec<T` should trigger this, as should `Vec<T>>`.
-    UnbalancedAngleBrackets,
-    /// The generics are not attached to a type.
-    ///
-    /// For example, `<T>` should trigger this.
-    ///
-    /// This is detected by checking if the path is empty after the generics are stripped.
-    MissingType,
-    /// The link uses fully-qualified syntax, which is currently unsupported.
-    ///
-    /// For example, `<Vec as IntoIterator>::into_iter` should trigger this.
-    ///
-    /// This is detected by checking if ` as ` (the keyword `as` with spaces around it) is inside
-    /// angle brackets.
-    HasFullyQualifiedSyntax,
-    /// The link has an invalid path separator.
-    ///
-    /// For example, `Vec:<T>:new()` should trigger this. Note that `Vec:new()` will **not**
-    /// trigger this because it has no generics and thus [`strip_generics_from_path`] will not be
-    /// called.
-    ///
-    /// Note that this will also **not** be triggered if the invalid path separator is inside angle
-    /// brackets because rustdoc mostly ignores what's inside angle brackets (except for
-    /// [`HasFullyQualifiedSyntax`](MalformedGenerics::HasFullyQualifiedSyntax)).
-    ///
-    /// This is detected by checking if there is a colon followed by a non-colon in the link.
-    InvalidPathSeparator,
-    /// The link has too many angle brackets.
-    ///
-    /// For example, `Vec<<T>>` should trigger this.
-    TooManyAngleBrackets,
-    /// The link has empty angle brackets.
-    ///
-    /// For example, `Vec<>` should trigger this.
-    EmptyAngleBrackets,
-}
-
 #[derive(Clone, Debug, Hash, PartialEq, Eq)]
 pub(crate) enum UrlFragment {
     Item(DefId),
@@ -271,7 +228,7 @@ struct ResolutionInfo {
     item_id: ItemId,
     module_id: DefId,
     dis: Option<Disambiguator>,
-    path_str: String,
+    path_str: Box<str>,
     extra_fragment: Option<String>,
 }
 
@@ -336,9 +293,10 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
         let ty_res = self.resolve_path(&path, TypeNS, item_id, module_id).ok_or_else(no_res)?;
 
         match ty_res {
-            Res::Def(DefKind::Enum, did) => match tcx.type_of(did).kind() {
+            Res::Def(DefKind::Enum, did) => match tcx.type_of(did).subst_identity().kind() {
                 ty::Adt(def, _) if def.is_enum() => {
-                    if let Some(field) = def.all_fields().find(|f| f.name == variant_field_name) {
+                    if let Some(variant) = def.variants().iter().find(|v| v.name == variant_name)
+                        && let Some(field) = variant.fields.iter().find(|f| f.name == variant_field_name) {
                         Ok((ty_res, field.did))
                     } else {
                         Err(UnresolvedPath {
@@ -401,16 +359,16 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                 _ => def_id,
             })
             .and_then(|self_id| match tcx.def_kind(self_id) {
-                DefKind::Impl => self.def_id_to_res(self_id),
+                DefKind::Impl { .. } => self.def_id_to_res(self_id),
                 DefKind::Use => None,
                 def_kind => Some(Res::Def(def_kind, self_id)),
             })
     }
 
-    /// Convenience wrapper around `resolve_rustdoc_path`.
+    /// Convenience wrapper around `doc_link_resolutions`.
     ///
     /// This also handles resolving `true` and `false` as booleans.
-    /// NOTE: `resolve_rustdoc_path` knows only about paths, not about types.
+    /// NOTE: `doc_link_resolutions` knows only about paths, not about types.
     /// Associated items will never be resolved by this function.
     fn resolve_path(
         &self,
@@ -426,17 +384,11 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
         // Resolver doesn't know about true, false, and types that aren't paths (e.g. `()`).
         let result = self
             .cx
-            .resolver_caches
-            .doc_link_resolutions
-            .get(&(Symbol::intern(path_str), ns, module_id))
+            .tcx
+            .doc_link_resolutions(module_id)
+            .get(&(Symbol::intern(path_str), ns))
             .copied()
-            .unwrap_or_else(|| {
-                self.cx.enter_resolver(|resolver| {
-                    let parent_scope =
-                        ParentScope::module(resolver.expect_module(module_id), resolver);
-                    resolver.resolve_rustdoc_path(path_str, ns, parent_scope)
-                })
-            })
+            .unwrap_or_else(|| panic!("no resolution for {:?} {:?} {:?}", path_str, ns, module_id))
             .and_then(|res| res.try_into().ok())
             .or_else(|| resolve_primitive(path_str, ns));
         debug!("{} resolved to {:?} in namespace {:?}", path_str, result, ns);
@@ -519,7 +471,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
     /// This is used for resolving type aliases.
     fn def_id_to_res(&self, ty_id: DefId) -> Option<Res> {
         use PrimitiveType::*;
-        Some(match *self.cx.tcx.type_of(ty_id).kind() {
+        Some(match *self.cx.tcx.type_of(ty_id).subst_identity().kind() {
             ty::Bool => Res::Primitive(Bool),
             ty::Char => Res::Primitive(Char),
             ty::Int(ity) => Res::Primitive(ity.into()),
@@ -542,6 +494,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
             | ty::Closure(..)
             | ty::Generator(..)
             | ty::GeneratorWitness(_)
+            | ty::GeneratorWitnessMIR(..)
             | ty::Dynamic(..)
             | ty::Param(_)
             | ty::Bound(..)
@@ -561,27 +514,27 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
         // FIXME: Only simple types are supported here, see if we can support
         // other types such as Tuple, Array, Slice, etc.
         // See https://github.com/rust-lang/rust/issues/90703#issuecomment-1004263455
-        Some(tcx.mk_ty(match prim {
-            Bool => ty::Bool,
-            Str => ty::Str,
-            Char => ty::Char,
-            Never => ty::Never,
-            I8 => ty::Int(ty::IntTy::I8),
-            I16 => ty::Int(ty::IntTy::I16),
-            I32 => ty::Int(ty::IntTy::I32),
-            I64 => ty::Int(ty::IntTy::I64),
-            I128 => ty::Int(ty::IntTy::I128),
-            Isize => ty::Int(ty::IntTy::Isize),
-            F32 => ty::Float(ty::FloatTy::F32),
-            F64 => ty::Float(ty::FloatTy::F64),
-            U8 => ty::Uint(ty::UintTy::U8),
-            U16 => ty::Uint(ty::UintTy::U16),
-            U32 => ty::Uint(ty::UintTy::U32),
-            U64 => ty::Uint(ty::UintTy::U64),
-            U128 => ty::Uint(ty::UintTy::U128),
-            Usize => ty::Uint(ty::UintTy::Usize),
+        Some(match prim {
+            Bool => tcx.types.bool,
+            Str => tcx.types.str_,
+            Char => tcx.types.char,
+            Never => tcx.types.never,
+            I8 => tcx.types.i8,
+            I16 => tcx.types.i16,
+            I32 => tcx.types.i32,
+            I64 => tcx.types.i64,
+            I128 => tcx.types.i128,
+            Isize => tcx.types.isize,
+            F32 => tcx.types.f32,
+            F64 => tcx.types.f64,
+            U8 => tcx.types.u8,
+            U16 => tcx.types.u16,
+            U32 => tcx.types.u32,
+            U64 => tcx.types.u64,
+            U128 => tcx.types.u128,
+            Usize => tcx.types.usize,
             _ => return None,
-        }))
+        })
     }
 
     /// Resolve an associated item, returning its containing page's `Res`
@@ -619,7 +572,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                 debug!("looking for associated item named {} for item {:?}", item_name, did);
                 // Checks if item_name is a variant of the `SomeItem` enum
                 if ns == TypeNS && def_kind == DefKind::Enum {
-                    match tcx.type_of(did).kind() {
+                    match tcx.type_of(did).subst_identity().kind() {
                         ty::Adt(adt_def, _) => {
                             for variant in adt_def.variants() {
                                 if variant.name == item_name {
@@ -653,7 +606,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                     // something like [`ambi_fn`](<SomeStruct as SomeTrait>::ambi_fn)
                     .or_else(|| {
                         resolve_associated_trait_item(
-                            tcx.type_of(did),
+                            tcx.type_of(did).subst_identity(),
                             module_id,
                             item_name,
                             ns,
@@ -686,7 +639,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                 // they also look like associated items (`module::Type::Variant`),
                 // because they are real Rust syntax (unlike the intra-doc links
                 // field syntax) and are handled by the compiler's resolver.
-                let def = match tcx.type_of(did).kind() {
+                let def = match tcx.type_of(did).subst_identity().kind() {
                     ty::Adt(def, _) if !def.is_enum() => def,
                     _ => return None,
                 };
@@ -736,12 +689,12 @@ fn resolve_associated_trait_item<'a>(
             .find_by_name_and_namespace(cx.tcx, Ident::with_dummy_span(item_name), ns, trait_)
             .map(|trait_assoc| {
                 trait_assoc_to_impl_assoc_item(cx.tcx, impl_, trait_assoc.def_id)
-                    .unwrap_or(trait_assoc)
+                    .unwrap_or(*trait_assoc)
             })
     });
     // FIXME(#74563): warn about ambiguity
     debug!("the candidates were {:?}", candidates.clone().collect::<Vec<_>>());
-    candidates.next().copied()
+    candidates.next()
 }
 
 /// Find the associated item in the impl `impl_id` that corresponds to the
@@ -758,7 +711,7 @@ fn trait_assoc_to_impl_assoc_item<'tcx>(
     tcx: TyCtxt<'tcx>,
     impl_id: DefId,
     trait_assoc_id: DefId,
-) -> Option<&'tcx ty::AssocItem> {
+) -> Option<ty::AssocItem> {
     let trait_to_impl_assoc_map = tcx.impl_item_implementor_ids(impl_id);
     debug!(?trait_to_impl_assoc_map);
     let impl_assoc_id = *trait_to_impl_assoc_map.get(&trait_assoc_id)?;
@@ -778,8 +731,7 @@ fn trait_impls_for<'a>(
     module: DefId,
 ) -> FxHashSet<(DefId, DefId)> {
     let tcx = cx.tcx;
-    let iter = cx.resolver_caches.traits_in_scope[&module].iter().flat_map(|trait_candidate| {
-        let trait_ = trait_candidate.def_id;
+    let iter = tcx.doc_link_traits_in_scope(module).iter().flat_map(|&trait_| {
         trace!("considering explicit impl for trait {:?}", trait_);
 
         // Look at each trait implementation to see if it's an impl for `did`
@@ -845,7 +797,7 @@ impl<'a, 'tcx> DocVisitor for LinkCollector<'a, 'tcx> {
         // In the presence of re-exports, this is not the same as the module of the item.
         // Rather than merging all documentation into one, resolve it one attribute at a time
         // so we know which module it came from.
-        for (parent_module, doc) in item.attrs.prepare_to_doc_link_resolution() {
+        for (parent_module, doc) in prepare_to_doc_link_resolution(&item.attrs.doc_strings) {
             if !may_have_doc_links(&doc) {
                 continue;
             }
@@ -853,22 +805,12 @@ impl<'a, 'tcx> DocVisitor for LinkCollector<'a, 'tcx> {
             // NOTE: if there are links that start in one crate and end in another, this will not resolve them.
             // This is a degenerate case and it's not supported by rustdoc.
             let parent_node = parent_module.or(parent_node);
-            let mut tmp_links = self
-                .cx
-                .resolver_caches
-                .markdown_links
-                .take()
-                .expect("`markdown_links` are already borrowed");
-            if !tmp_links.contains_key(&doc) {
-                tmp_links.insert(doc.clone(), preprocessed_markdown_links(&doc));
-            }
-            for md_link in &tmp_links[&doc] {
-                let link = self.resolve_link(item, &doc, parent_node, md_link);
+            for md_link in preprocessed_markdown_links(&doc) {
+                let link = self.resolve_link(item, &doc, parent_node, &md_link);
                 if let Some(link) = link {
                     self.cx.cache.intra_doc_links.entry(item.item_id).or_default().push(link);
                 }
             }
-            self.cx.resolver_caches.markdown_links = Some(tmp_links);
         }
 
         if item.is_mod() {
@@ -907,10 +849,10 @@ impl PreprocessingError {
 
 #[derive(Clone)]
 struct PreprocessingInfo {
-    path_str: String,
+    path_str: Box<str>,
     disambiguator: Option<Disambiguator>,
     extra_fragment: Option<String>,
-    link_text: String,
+    link_text: Box<str>,
 }
 
 // Not a typedef to avoid leaking several private structures from this module.
@@ -942,7 +884,8 @@ fn preprocess_link(
     let mut parts = stripped.split('#');
 
     let link = parts.next().unwrap();
-    if link.trim().is_empty() {
+    let link = link.trim();
+    if link.is_empty() {
         // This is an anchor to an element of the current page, nothing to do in here!
         return None;
     }
@@ -955,7 +898,7 @@ fn preprocess_link(
     // Parse and strip the disambiguator from the link, if present.
     let (disambiguator, path_str, link_text) = match Disambiguator::from_str(link) {
         Ok(Some((d, path, link_text))) => (Some(d), path.trim(), link_text.trim()),
-        Ok(None) => (None, link.trim(), link.trim()),
+        Ok(None) => (None, link, link),
         Err((err_msg, relative_range)) => {
             // Only report error if we would not have ignored this link. See issue #83859.
             if !should_ignore_link_with_disambiguators(link) {
@@ -974,16 +917,12 @@ fn preprocess_link(
     }
 
     // Strip generics from the path.
-    let path_str = if path_str.contains(['<', '>'].as_slice()) {
-        match strip_generics_from_path(path_str) {
-            Ok(path) => path,
-            Err(err) => {
-                debug!("link has malformed generics: {}", path_str);
-                return Some(Err(PreprocessingError::MalformedGenerics(err, path_str.to_owned())));
-            }
+    let path_str = match strip_generics_from_path(path_str) {
+        Ok(path) => path,
+        Err(err) => {
+            debug!("link has malformed generics: {}", path_str);
+            return Some(Err(PreprocessingError::MalformedGenerics(err, path_str.to_owned())));
         }
-    } else {
-        path_str.to_owned()
     };
 
     // Sanity check to make sure we don't have any angle brackets after stripping generics.
@@ -998,7 +937,7 @@ fn preprocess_link(
         path_str,
         disambiguator,
         extra_fragment: extra_fragment.map(|frag| frag.to_owned()),
-        link_text: link_text.to_owned(),
+        link_text: Box::<str>::from(link_text),
     }))
 }
 
@@ -1054,7 +993,7 @@ impl LinkCollector<'_, '_> {
                 item_id: item.item_id,
                 module_id,
                 dis: disambiguator,
-                path_str: path_str.to_owned(),
+                path_str: path_str.clone(),
                 extra_fragment: extra_fragment.clone(),
             },
             diag_info.clone(), // this struct should really be Copy, but Range is not :(
@@ -1128,7 +1067,7 @@ impl LinkCollector<'_, '_> {
                 }
 
                 res.def_id(self.cx.tcx).map(|page_id| ItemLink {
-                    link: ori_link.link.clone(),
+                    link: Box::<str>::from(&*ori_link.link),
                     link_text: link_text.clone(),
                     page_id,
                     fragment,
@@ -1152,7 +1091,7 @@ impl LinkCollector<'_, '_> {
 
                 let page_id = clean::register_res(self.cx, rustc_hir::def::Res::Def(kind, id));
                 Some(ItemLink {
-                    link: ori_link.link.clone(),
+                    link: Box::<str>::from(&*ori_link.link),
                     link_text: link_text.clone(),
                     page_id,
                     fragment,
@@ -1194,14 +1133,9 @@ impl LinkCollector<'_, '_> {
             }
 
         // item can be non-local e.g. when using #[doc(primitive = "pointer")]
-        if let Some((src_id, dst_id)) = id
-            .as_local()
-            // The `expect_def_id()` should be okay because `local_def_id_to_hir_id`
-            // would presumably panic if a fake `DefIndex` were passed.
-            .and_then(|dst_id| {
-                item.item_id.expect_def_id().as_local().map(|src_id| (src_id, dst_id))
-            })
-        {
+        if let Some((src_id, dst_id)) = id.as_local().and_then(|dst_id| {
+            item.item_id.expect_def_id().as_local().map(|src_id| (src_id, dst_id))
+        }) {
             if self.cx.tcx.effective_visibilities(()).is_exported(src_id)
                 && !self.cx.tcx.effective_visibilities(()).is_exported(dst_id)
             {
@@ -1681,7 +1615,7 @@ fn resolution_failure(
             // ignore duplicates
             let mut variants_seen = SmallVec::<[_; 3]>::new();
             for mut failure in kinds {
-                let variant = std::mem::discriminant(&failure);
+                let variant = mem::discriminant(&failure);
                 if variants_seen.contains(&variant) {
                     continue;
                 }
@@ -1751,7 +1685,7 @@ fn resolution_failure(
 
                         if !path_str.contains("::") {
                             if disambiguator.map_or(true, |d| d.ns() == MacroNS)
-                                && let Some(&res) = collector.cx.resolver_caches.all_macro_rules
+                                && let Some(&res) = collector.cx.tcx.resolutions(()).all_macro_rules
                                                              .get(&Symbol::intern(path_str))
                             {
                                 diag.note(format!(
@@ -1772,15 +1706,35 @@ fn resolution_failure(
 
                     // Otherwise, it must be an associated item or variant
                     let res = partial_res.expect("None case was handled by `last_found_module`");
-                    let kind = match res {
-                        Res::Def(kind, _) => Some(kind),
+                    let kind_did = match res {
+                        Res::Def(kind, did) => Some((kind, did)),
                         Res::Primitive(_) => None,
                     };
-                    let path_description = if let Some(kind) = kind {
+                    let is_struct_variant = |did| {
+                        if let ty::Adt(def, _) = tcx.type_of(did).subst_identity().kind()
+                        && def.is_enum()
+                        && let Some(variant) = def.variants().iter().find(|v| v.name == res.name(tcx)) {
+                            // ctor is `None` if variant is a struct
+                            variant.ctor.is_none()
+                        } else {
+                            false
+                        }
+                    };
+                    let path_description = if let Some((kind, did)) = kind_did {
                         match kind {
                             Mod | ForeignMod => "inner item",
                             Struct => "field or associated item",
                             Enum | Union => "variant or associated item",
+                            Variant if is_struct_variant(did) => {
+                                let variant = res.name(tcx);
+                                let note = format!("variant `{variant}` has no such field");
+                                if let Some(span) = sp {
+                                    diag.span_label(span, &note);
+                                } else {
+                                    diag.note(&note);
+                                }
+                                return;
+                            }
                             Variant
                             | Field
                             | Closure
@@ -1808,7 +1762,7 @@ fn resolution_failure(
                             }
                             Trait | TyAlias | ForeignTy | OpaqueTy | ImplTraitPlaceholder
                             | TraitAlias | TyParam | Static(_) => "associated item",
-                            Impl | GlobalAsm => unreachable!("not a path"),
+                            Impl { .. } | GlobalAsm => unreachable!("not a path"),
                         }
                     } else {
                         "associated item"
@@ -2068,94 +2022,3 @@ fn resolve_primitive(path_str: &str, ns: Namespace) -> Option<Res> {
     debug!("resolved primitives {:?}", prim);
     Some(Res::Primitive(prim))
 }
-
-fn strip_generics_from_path(path_str: &str) -> Result<String, MalformedGenerics> {
-    let mut stripped_segments = vec![];
-    let mut path = path_str.chars().peekable();
-    let mut segment = Vec::new();
-
-    while let Some(chr) = path.next() {
-        match chr {
-            ':' => {
-                if path.next_if_eq(&':').is_some() {
-                    let stripped_segment =
-                        strip_generics_from_path_segment(mem::take(&mut segment))?;
-                    if !stripped_segment.is_empty() {
-                        stripped_segments.push(stripped_segment);
-                    }
-                } else {
-                    return Err(MalformedGenerics::InvalidPathSeparator);
-                }
-            }
-            '<' => {
-                segment.push(chr);
-
-                match path.next() {
-                    Some('<') => {
-                        return Err(MalformedGenerics::TooManyAngleBrackets);
-                    }
-                    Some('>') => {
-                        return Err(MalformedGenerics::EmptyAngleBrackets);
-                    }
-                    Some(chr) => {
-                        segment.push(chr);
-
-                        while let Some(chr) = path.next_if(|c| *c != '>') {
-                            segment.push(chr);
-                        }
-                    }
-                    None => break,
-                }
-            }
-            _ => segment.push(chr),
-        }
-        trace!("raw segment: {:?}", segment);
-    }
-
-    if !segment.is_empty() {
-        let stripped_segment = strip_generics_from_path_segment(segment)?;
-        if !stripped_segment.is_empty() {
-            stripped_segments.push(stripped_segment);
-        }
-    }
-
-    debug!("path_str: {:?}\nstripped segments: {:?}", path_str, &stripped_segments);
-
-    let stripped_path = stripped_segments.join("::");
-
-    if !stripped_path.is_empty() { Ok(stripped_path) } else { Err(MalformedGenerics::MissingType) }
-}
-
-fn strip_generics_from_path_segment(segment: Vec<char>) -> Result<String, MalformedGenerics> {
-    let mut stripped_segment = String::new();
-    let mut param_depth = 0;
-
-    let mut latest_generics_chunk = String::new();
-
-    for c in segment {
-        if c == '<' {
-            param_depth += 1;
-            latest_generics_chunk.clear();
-        } else if c == '>' {
-            param_depth -= 1;
-            if latest_generics_chunk.contains(" as ") {
-                // The segment tries to use fully-qualified syntax, which is currently unsupported.
-                // Give a helpful error message instead of completely ignoring the angle brackets.
-                return Err(MalformedGenerics::HasFullyQualifiedSyntax);
-            }
-        } else {
-            if param_depth == 0 {
-                stripped_segment.push(c);
-            } else {
-                latest_generics_chunk.push(c);
-            }
-        }
-    }
-
-    if param_depth == 0 {
-        Ok(stripped_segment)
-    } else {
-        // The segment has unbalanced angle brackets, e.g. `Vec<T` or `Vec<T>>`
-        Err(MalformedGenerics::UnbalancedAngleBrackets)
-    }
-}
diff --git a/src/librustdoc/passes/collect_intra_doc_links/early.rs b/src/librustdoc/passes/collect_intra_doc_links/early.rs
deleted file mode 100644
index 42677bd84..000000000
--- a/src/librustdoc/passes/collect_intra_doc_links/early.rs
+++ /dev/null
@@ -1,407 +0,0 @@
-use crate::clean::Attributes;
-use crate::core::ResolverCaches;
-use crate::passes::collect_intra_doc_links::preprocessed_markdown_links;
-use crate::passes::collect_intra_doc_links::{Disambiguator, PreprocessedMarkdownLink};
-
-use rustc_ast::visit::{self, AssocCtxt, Visitor};
-use rustc_ast::{self as ast, ItemKind};
-use rustc_data_structures::fx::FxHashMap;
-use rustc_hir::def::Namespace::*;
-use rustc_hir::def::{DefKind, Namespace, Res};
-use rustc_hir::def_id::{DefId, DefIdMap, DefIdSet, CRATE_DEF_ID};
-use rustc_hir::TraitCandidate;
-use rustc_middle::ty::{DefIdTree, Visibility};
-use rustc_resolve::{ParentScope, Resolver};
-use rustc_span::symbol::sym;
-use rustc_span::{Symbol, SyntaxContext};
-
-use std::collections::hash_map::Entry;
-use std::mem;
-
-pub(crate) fn early_resolve_intra_doc_links(
-    resolver: &mut Resolver<'_>,
-    krate: &ast::Crate,
-    document_private_items: bool,
-) -> ResolverCaches {
-    let parent_scope =
-        ParentScope::module(resolver.expect_module(CRATE_DEF_ID.to_def_id()), resolver);
-    let mut link_resolver = EarlyDocLinkResolver {
-        resolver,
-        parent_scope,
-        visited_mods: Default::default(),
-        markdown_links: Default::default(),
-        doc_link_resolutions: Default::default(),
-        traits_in_scope: Default::default(),
-        all_trait_impls: Default::default(),
-        all_macro_rules: Default::default(),
-        document_private_items,
-    };
-
-    // Overridden `visit_item` below doesn't apply to the crate root,
-    // so we have to visit its attributes and reexports separately.
-    link_resolver.resolve_doc_links_local(&krate.attrs);
-    link_resolver.process_module_children_or_reexports(CRATE_DEF_ID.to_def_id());
-    visit::walk_crate(&mut link_resolver, krate);
-
-    // FIXME: somehow rustdoc is still missing crates even though we loaded all
-    // the known necessary crates. Load them all unconditionally until we find a way to fix this.
-    // DO NOT REMOVE THIS without first testing on the reproducer in
-    // https://github.com/jyn514/objr/commit/edcee7b8124abf0e4c63873e8422ff81beb11ebb
-    for (extern_name, _) in
-        link_resolver.resolver.sess().opts.externs.iter().filter(|(_, entry)| entry.add_prelude)
-    {
-        link_resolver.resolver.resolve_rustdoc_path(extern_name, TypeNS, parent_scope);
-    }
-
-    link_resolver.process_extern_impls();
-
-    ResolverCaches {
-        markdown_links: Some(link_resolver.markdown_links),
-        doc_link_resolutions: link_resolver.doc_link_resolutions,
-        traits_in_scope: link_resolver.traits_in_scope,
-        all_trait_impls: Some(link_resolver.all_trait_impls),
-        all_macro_rules: link_resolver.all_macro_rules,
-    }
-}
-
-fn doc_attrs<'a>(attrs: impl Iterator<Item = &'a ast::Attribute>) -> Attributes {
-    Attributes::from_ast_iter(attrs.map(|attr| (attr, None)), true)
-}
-
-struct EarlyDocLinkResolver<'r, 'ra> {
-    resolver: &'r mut Resolver<'ra>,
-    parent_scope: ParentScope<'ra>,
-    visited_mods: DefIdSet,
-    markdown_links: FxHashMap<String, Vec<PreprocessedMarkdownLink>>,
-    doc_link_resolutions: FxHashMap<(Symbol, Namespace, DefId), Option<Res<ast::NodeId>>>,
-    traits_in_scope: DefIdMap<Vec<TraitCandidate>>,
-    all_trait_impls: Vec<DefId>,
-    all_macro_rules: FxHashMap<Symbol, Res<ast::NodeId>>,
-    document_private_items: bool,
-}
-
-impl<'ra> EarlyDocLinkResolver<'_, 'ra> {
-    fn add_traits_in_scope(&mut self, def_id: DefId) {
-        // Calls to `traits_in_scope` are expensive, so try to avoid them if only possible.
-        // Keys in the `traits_in_scope` cache are always module IDs.
-        if let Entry::Vacant(entry) = self.traits_in_scope.entry(def_id) {
-            let module = self.resolver.get_nearest_non_block_module(def_id);
-            let module_id = module.def_id();
-            let entry = if module_id == def_id {
-                Some(entry)
-            } else if let Entry::Vacant(entry) = self.traits_in_scope.entry(module_id) {
-                Some(entry)
-            } else {
-                None
-            };
-            if let Some(entry) = entry {
-                entry.insert(self.resolver.traits_in_scope(
-                    None,
-                    &ParentScope::module(module, self.resolver),
-                    SyntaxContext::root(),
-                    None,
-                ));
-            }
-        }
-    }
-
-    /// Add traits in scope for links in impls collected by the `collect-intra-doc-links` pass.
-    /// That pass filters impls using type-based information, but we don't yet have such
-    /// information here, so we just conservatively calculate traits in scope for *all* modules
-    /// having impls in them.
-    fn process_extern_impls(&mut self) {
-        // Resolving links in already existing crates may trigger loading of new crates.
-        let mut start_cnum = 0;
-        loop {
-            let crates = Vec::from_iter(self.resolver.cstore().crates_untracked());
-            for &cnum in &crates[start_cnum..] {
-                let all_trait_impls =
-                    Vec::from_iter(self.resolver.cstore().trait_impls_in_crate_untracked(cnum));
-                let all_inherent_impls =
-                    Vec::from_iter(self.resolver.cstore().inherent_impls_in_crate_untracked(cnum));
-                let all_incoherent_impls = Vec::from_iter(
-                    self.resolver.cstore().incoherent_impls_in_crate_untracked(cnum),
-                );
-
-                // Querying traits in scope is expensive so we try to prune the impl lists using
-                // privacy, private traits and impls from other crates are never documented in
-                // the current crate, and links in their doc comments are not resolved.
-                for &(trait_def_id, impl_def_id, simplified_self_ty) in &all_trait_impls {
-                    if self.resolver.cstore().visibility_untracked(trait_def_id).is_public()
-                        && simplified_self_ty.and_then(|ty| ty.def()).map_or(true, |ty_def_id| {
-                            self.resolver.cstore().visibility_untracked(ty_def_id).is_public()
-                        })
-                    {
-                        if self.visited_mods.insert(trait_def_id) {
-                            self.resolve_doc_links_extern_impl(trait_def_id, false);
-                        }
-                        self.resolve_doc_links_extern_impl(impl_def_id, false);
-                    }
-                }
-                for (ty_def_id, impl_def_id) in all_inherent_impls {
-                    if self.resolver.cstore().visibility_untracked(ty_def_id).is_public() {
-                        self.resolve_doc_links_extern_impl(impl_def_id, true);
-                    }
-                }
-                for impl_def_id in all_incoherent_impls {
-                    self.resolve_doc_links_extern_impl(impl_def_id, true);
-                }
-
-                self.all_trait_impls
-                    .extend(all_trait_impls.into_iter().map(|(_, def_id, _)| def_id));
-            }
-
-            if crates.len() > start_cnum {
-                start_cnum = crates.len();
-            } else {
-                break;
-            }
-        }
-    }
-
-    fn resolve_doc_links_extern_impl(&mut self, def_id: DefId, is_inherent: bool) {
-        self.resolve_doc_links_extern_outer_fixme(def_id, def_id);
-        let assoc_item_def_ids = Vec::from_iter(
-            self.resolver.cstore().associated_item_def_ids_untracked(def_id, self.resolver.sess()),
-        );
-        for assoc_def_id in assoc_item_def_ids {
-            if !is_inherent || self.resolver.cstore().visibility_untracked(assoc_def_id).is_public()
-            {
-                self.resolve_doc_links_extern_outer_fixme(assoc_def_id, def_id);
-            }
-        }
-    }
-
-    // FIXME: replace all uses with `resolve_doc_links_extern_outer` to actually resolve links, not
-    // just add traits in scope. This may be expensive and require benchmarking and optimization.
-    fn resolve_doc_links_extern_outer_fixme(&mut self, def_id: DefId, scope_id: DefId) {
-        if !self.resolver.cstore().may_have_doc_links_untracked(def_id) {
-            return;
-        }
-        if let Some(parent_id) = self.resolver.opt_parent(scope_id) {
-            self.add_traits_in_scope(parent_id);
-        }
-    }
-
-    fn resolve_doc_links_extern_outer(&mut self, def_id: DefId, scope_id: DefId) {
-        if !self.resolver.cstore().may_have_doc_links_untracked(def_id) {
-            return;
-        }
-        let attrs = Vec::from_iter(
-            self.resolver.cstore().item_attrs_untracked(def_id, self.resolver.sess()),
-        );
-        let parent_scope = ParentScope::module(
-            self.resolver.get_nearest_non_block_module(
-                self.resolver.opt_parent(scope_id).unwrap_or(scope_id),
-            ),
-            self.resolver,
-        );
-        self.resolve_doc_links(doc_attrs(attrs.iter()), parent_scope);
-    }
-
-    fn resolve_doc_links_extern_inner(&mut self, def_id: DefId) {
-        if !self.resolver.cstore().may_have_doc_links_untracked(def_id) {
-            return;
-        }
-        let attrs = Vec::from_iter(
-            self.resolver.cstore().item_attrs_untracked(def_id, self.resolver.sess()),
-        );
-        let parent_scope = ParentScope::module(self.resolver.expect_module(def_id), self.resolver);
-        self.resolve_doc_links(doc_attrs(attrs.iter()), parent_scope);
-    }
-
-    fn resolve_doc_links_local(&mut self, attrs: &[ast::Attribute]) {
-        if !attrs.iter().any(|attr| attr.may_have_doc_links()) {
-            return;
-        }
-        self.resolve_doc_links(doc_attrs(attrs.iter()), self.parent_scope);
-    }
-
-    fn resolve_and_cache(
-        &mut self,
-        path_str: &str,
-        ns: Namespace,
-        parent_scope: &ParentScope<'ra>,
-    ) -> bool {
-        // FIXME: This caching may be incorrect in case of multiple `macro_rules`
-        // items with the same name in the same module.
-        self.doc_link_resolutions
-            .entry((Symbol::intern(path_str), ns, parent_scope.module.def_id()))
-            .or_insert_with_key(|(path, ns, _)| {
-                self.resolver.resolve_rustdoc_path(path.as_str(), *ns, *parent_scope)
-            })
-            .is_some()
-    }
-
-    fn resolve_doc_links(&mut self, attrs: Attributes, parent_scope: ParentScope<'ra>) {
-        let mut need_traits_in_scope = false;
-        for (doc_module, doc) in attrs.prepare_to_doc_link_resolution() {
-            assert_eq!(doc_module, None);
-            let mut tmp_links = mem::take(&mut self.markdown_links);
-            let links =
-                tmp_links.entry(doc).or_insert_with_key(|doc| preprocessed_markdown_links(doc));
-            for PreprocessedMarkdownLink(pp_link, _) in links {
-                if let Ok(pinfo) = pp_link {
-                    // The logic here is a conservative approximation for path resolution in
-                    // `resolve_with_disambiguator`.
-                    if let Some(ns) = pinfo.disambiguator.map(Disambiguator::ns) {
-                        if self.resolve_and_cache(&pinfo.path_str, ns, &parent_scope) {
-                            continue;
-                        }
-                    }
-
-                    // Resolve all namespaces due to no disambiguator or for diagnostics.
-                    let mut any_resolved = false;
-                    let mut need_assoc = false;
-                    for ns in [TypeNS, ValueNS, MacroNS] {
-                        if self.resolve_and_cache(&pinfo.path_str, ns, &parent_scope) {
-                            any_resolved = true;
-                        } else if ns != MacroNS {
-                            need_assoc = true;
-                        }
-                    }
-
-                    // Resolve all prefixes for type-relative resolution or for diagnostics.
-                    if need_assoc || !any_resolved {
-                        let mut path = &pinfo.path_str[..];
-                        while let Some(idx) = path.rfind("::") {
-                            path = &path[..idx];
-                            need_traits_in_scope = true;
-                            for ns in [TypeNS, ValueNS, MacroNS] {
-                                self.resolve_and_cache(path, ns, &parent_scope);
-                            }
-                        }
-                    }
-                }
-            }
-            self.markdown_links = tmp_links;
-        }
-
-        if need_traits_in_scope {
-            self.add_traits_in_scope(parent_scope.module.def_id());
-        }
-    }
-
-    /// When reexports are inlined, they are replaced with item which they refer to, those items
-    /// may have links in their doc comments, those links are resolved at the item definition site,
-    /// so we need to know traits in scope at that definition site.
-    fn process_module_children_or_reexports(&mut self, module_id: DefId) {
-        if !self.visited_mods.insert(module_id) {
-            return; // avoid infinite recursion
-        }
-
-        for child in self.resolver.module_children_or_reexports(module_id) {
-            // This condition should give a superset of `denied` from `fn clean_use_statement`.
-            if child.vis.is_public()
-                || self.document_private_items
-                    && child.vis != Visibility::Restricted(module_id)
-                    && module_id.is_local()
-            {
-                if let Some(def_id) = child.res.opt_def_id() && !def_id.is_local() {
-                    let scope_id = match child.res {
-                        Res::Def(
-                            DefKind::Variant
-                            | DefKind::AssocTy
-                            | DefKind::AssocFn
-                            | DefKind::AssocConst,
-                            ..,
-                        ) => self.resolver.parent(def_id),
-                        _ => def_id,
-                    };
-                    self.resolve_doc_links_extern_outer(def_id, scope_id); // Outer attribute scope
-                    if let Res::Def(DefKind::Mod, ..) = child.res {
-                        self.resolve_doc_links_extern_inner(def_id); // Inner attribute scope
-                    }
-                    if let Res::Def(DefKind::Mod | DefKind::Enum | DefKind::Trait, ..) = child.res {
-                        self.process_module_children_or_reexports(def_id);
-                    }
-                    if let Res::Def(DefKind::Struct | DefKind::Union | DefKind::Variant, _) =
-                        child.res
-                    {
-                        let field_def_ids = Vec::from_iter(
-                            self.resolver
-                                .cstore()
-                                .associated_item_def_ids_untracked(def_id, self.resolver.sess()),
-                        );
-                        for field_def_id in field_def_ids {
-                            self.resolve_doc_links_extern_outer(field_def_id, scope_id);
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-impl Visitor<'_> for EarlyDocLinkResolver<'_, '_> {
-    fn visit_item(&mut self, item: &ast::Item) {
-        self.resolve_doc_links_local(&item.attrs); // Outer attribute scope
-        if let ItemKind::Mod(..) = item.kind {
-            let module_def_id = self.resolver.local_def_id(item.id).to_def_id();
-            let module = self.resolver.expect_module(module_def_id);
-            let old_module = mem::replace(&mut self.parent_scope.module, module);
-            let old_macro_rules = self.parent_scope.macro_rules;
-            self.resolve_doc_links_local(&item.attrs); // Inner attribute scope
-            self.process_module_children_or_reexports(module_def_id);
-            visit::walk_item(self, item);
-            if item
-                .attrs
-                .iter()
-                .all(|attr| !attr.has_name(sym::macro_use) && !attr.has_name(sym::macro_escape))
-            {
-                self.parent_scope.macro_rules = old_macro_rules;
-            }
-            self.parent_scope.module = old_module;
-        } else {
-            match &item.kind {
-                ItemKind::Impl(box ast::Impl { of_trait: Some(trait_ref), .. }) => {
-                    if let Some(partial_res) = self.resolver.get_partial_res(trait_ref.ref_id)
-                        && let Some(res) = partial_res.full_res()
-                        && let Some(trait_def_id) = res.opt_def_id()
-                        && !trait_def_id.is_local()
-                        && self.visited_mods.insert(trait_def_id) {
-                        self.resolve_doc_links_extern_impl(trait_def_id, false);
-                    }
-                    self.all_trait_impls.push(self.resolver.local_def_id(item.id).to_def_id());
-                }
-                ItemKind::MacroDef(macro_def) if macro_def.macro_rules => {
-                    let (macro_rules_scope, res) =
-                        self.resolver.macro_rules_scope(self.resolver.local_def_id(item.id));
-                    self.parent_scope.macro_rules = macro_rules_scope;
-                    self.all_macro_rules.insert(item.ident.name, res);
-                }
-                _ => {}
-            }
-            visit::walk_item(self, item);
-        }
-    }
-
-    fn visit_assoc_item(&mut self, item: &ast::AssocItem, ctxt: AssocCtxt) {
-        self.resolve_doc_links_local(&item.attrs);
-        visit::walk_assoc_item(self, item, ctxt)
-    }
-
-    fn visit_foreign_item(&mut self, item: &ast::ForeignItem) {
-        self.resolve_doc_links_local(&item.attrs);
-        visit::walk_foreign_item(self, item)
-    }
-
-    fn visit_variant(&mut self, v: &ast::Variant) {
-        self.resolve_doc_links_local(&v.attrs);
-        visit::walk_variant(self, v)
-    }
-
-    fn visit_field_def(&mut self, field: &ast::FieldDef) {
-        self.resolve_doc_links_local(&field.attrs);
-        visit::walk_field_def(self, field)
-    }
-
-    fn visit_block(&mut self, block: &ast::Block) {
-        let old_macro_rules = self.parent_scope.macro_rules;
-        visit::walk_block(self, block);
-        self.parent_scope.macro_rules = old_macro_rules;
-    }
-
-    // NOTE: if doc-comments are ever allowed on other nodes (e.g. function parameters),
-    // then this will have to implement other visitor methods too.
-}
diff --git a/src/librustdoc/passes/collect_trait_impls.rs b/src/librustdoc/passes/collect_trait_impls.rs
index 79db3c6c3..01ed4a60b 100644
--- a/src/librustdoc/passes/collect_trait_impls.rs
+++ b/src/librustdoc/passes/collect_trait_impls.rs
@@ -7,8 +7,8 @@ use crate::core::DocContext;
 use crate::formats::cache::Cache;
 use crate::visit::DocVisitor;
 
-use rustc_data_structures::fx::{FxHashMap, FxHashSet};
-use rustc_hir::def_id::{DefId, LOCAL_CRATE};
+use rustc_data_structures::fx::FxHashSet;
+use rustc_hir::def_id::{DefId, DefIdMap, DefIdSet, LOCAL_CRATE};
 use rustc_middle::ty::{self, DefIdTree};
 use rustc_span::symbol::sym;
 
@@ -45,18 +45,20 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
     let mut new_items_local = Vec::new();
 
     // External trait impls.
-    cx.with_all_trait_impls(|cx, all_trait_impls| {
+    {
         let _prof_timer = cx.tcx.sess.prof.generic_activity("build_extern_trait_impls");
-        for &impl_def_id in all_trait_impls.iter().skip_while(|def_id| def_id.is_local()) {
-            inline::build_impl(cx, None, impl_def_id, None, &mut new_items_external);
+        for &cnum in cx.tcx.crates(()) {
+            for &impl_def_id in cx.tcx.trait_impls_in_crate(cnum) {
+                inline::build_impl(cx, None, impl_def_id, None, &mut new_items_external);
+            }
         }
-    });
+    }
 
     // Local trait impls.
-    cx.with_all_trait_impls(|cx, all_trait_impls| {
+    {
         let _prof_timer = cx.tcx.sess.prof.generic_activity("build_local_trait_impls");
         let mut attr_buf = Vec::new();
-        for &impl_def_id in all_trait_impls.iter().take_while(|def_id| def_id.is_local()) {
+        for &impl_def_id in cx.tcx.trait_impls_in_crate(LOCAL_CRATE) {
             let mut parent = Some(cx.tcx.parent(impl_def_id));
             while let Some(did) = parent {
                 attr_buf.extend(
@@ -76,7 +78,7 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
             inline::build_impl(cx, None, impl_def_id, Some(&attr_buf), &mut new_items_local);
             attr_buf.clear();
         }
-    });
+    }
 
     cx.tcx.sess.prof.generic_activity("build_primitive_trait_impls").run(|| {
         for def_id in PrimitiveType::all_impls(cx.tcx) {
@@ -107,7 +109,7 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
                     // `Generics`. To avoid relying on the `impl` block, these
                     // things would need to be created from wholecloth, in a
                     // form that is valid for use in type inference.
-                    let ty = tcx.type_of(def_id);
+                    let ty = tcx.type_of(def_id).subst_identity();
                     match ty.kind() {
                         ty::Slice(ty)
                         | ty::Ref(_, ty, _)
@@ -126,14 +128,14 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
     });
 
     let mut cleaner = BadImplStripper { prims, items: crate_items, cache: &cx.cache };
-    let mut type_did_to_deref_target: FxHashMap<DefId, &Type> = FxHashMap::default();
+    let mut type_did_to_deref_target: DefIdMap<&Type> = DefIdMap::default();
 
     // Follow all `Deref` targets of included items and recursively add them as valid
     fn add_deref_target(
         cx: &DocContext<'_>,
-        map: &FxHashMap<DefId, &Type>,
+        map: &DefIdMap<&Type>,
         cleaner: &mut BadImplStripper<'_>,
-        targets: &mut FxHashSet<DefId>,
+        targets: &mut DefIdSet,
         type_did: DefId,
     ) {
         if let Some(target) = map.get(&type_did) {
@@ -154,39 +156,38 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
 
     // scan through included items ahead of time to splice in Deref targets to the "valid" sets
     for it in new_items_external.iter().chain(new_items_local.iter()) {
-        if let ImplItem(box Impl { ref for_, ref trait_, ref items, .. }) = *it.kind {
-            if trait_.as_ref().map(|t| t.def_id()) == cx.tcx.lang_items().deref_trait()
-                && cleaner.keep_impl(for_, true)
-            {
-                let target = items
-                    .iter()
-                    .find_map(|item| match *item.kind {
-                        AssocTypeItem(ref t, _) => Some(&t.type_),
-                        _ => None,
-                    })
-                    .expect("Deref impl without Target type");
+        if let ImplItem(box Impl { ref for_, ref trait_, ref items, .. }) = *it.kind &&
+            trait_.as_ref().map(|t| t.def_id()) == cx.tcx.lang_items().deref_trait() &&
+            cleaner.keep_impl(for_, true)
+        {
+            let target = items
+                .iter()
+                .find_map(|item| match *item.kind {
+                    AssocTypeItem(ref t, _) => Some(&t.type_),
+                    _ => None,
+                })
+                .expect("Deref impl without Target type");
 
-                if let Some(prim) = target.primitive_type() {
-                    cleaner.prims.insert(prim);
-                } else if let Some(did) = target.def_id(&cx.cache) {
-                    cleaner.items.insert(did.into());
-                }
-                if let Some(for_did) = for_.def_id(&cx.cache) {
-                    if type_did_to_deref_target.insert(for_did, target).is_none() {
-                        // Since only the `DefId` portion of the `Type` instances is known to be same for both the
-                        // `Deref` target type and the impl for type positions, this map of types is keyed by
-                        // `DefId` and for convenience uses a special cleaner that accepts `DefId`s directly.
-                        if cleaner.keep_impl_with_def_id(for_did.into()) {
-                            let mut targets = FxHashSet::default();
-                            targets.insert(for_did);
-                            add_deref_target(
-                                cx,
-                                &type_did_to_deref_target,
-                                &mut cleaner,
-                                &mut targets,
-                                for_did,
-                            );
-                        }
+            if let Some(prim) = target.primitive_type() {
+                cleaner.prims.insert(prim);
+            } else if let Some(did) = target.def_id(&cx.cache) {
+                cleaner.items.insert(did.into());
+            }
+            if let Some(for_did) = for_.def_id(&cx.cache) {
+                if type_did_to_deref_target.insert(for_did, target).is_none() {
+                    // Since only the `DefId` portion of the `Type` instances is known to be same for both the
+                    // `Deref` target type and the impl for type positions, this map of types is keyed by
+                    // `DefId` and for convenience uses a special cleaner that accepts `DefId`s directly.
+                    if cleaner.keep_impl_with_def_id(for_did.into()) {
+                        let mut targets = DefIdSet::default();
+                        targets.insert(for_did);
+                        add_deref_target(
+                            cx,
+                            &type_did_to_deref_target,
+                            &mut cleaner,
+                            &mut targets,
+                            for_did,
+                        );
                     }
                 }
             }
diff --git a/src/librustdoc/passes/lint/check_code_block_syntax.rs b/src/librustdoc/passes/lint/check_code_block_syntax.rs
index 7158355ff..26fbb03a4 100644
--- a/src/librustdoc/passes/lint/check_code_block_syntax.rs
+++ b/src/librustdoc/passes/lint/check_code_block_syntax.rs
@@ -19,8 +19,7 @@ use crate::passes::source_span_for_markdown_range;
 pub(crate) fn visit_item(cx: &DocContext<'_>, item: &clean::Item) {
     if let Some(dox) = &item.attrs.collapsed_doc_value() {
         let sp = item.attr_span(cx.tcx);
-        let extra =
-            crate::html::markdown::ExtraInfo::new_did(cx.tcx, item.item_id.expect_def_id(), sp);
+        let extra = crate::html::markdown::ExtraInfo::new(cx.tcx, item.item_id.expect_def_id(), sp);
         for code_block in markdown::rust_code_blocks(dox, &extra) {
             check_rust_syntax(cx, item, dox, code_block);
         }
@@ -34,8 +33,10 @@ fn check_rust_syntax(
     code_block: RustCodeBlock,
 ) {
     let buffer = Lrc::new(Lock::new(Buffer::default()));
-    let fallback_bundle =
-        rustc_errors::fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false);
+    let fallback_bundle = rustc_errors::fallback_fluent_bundle(
+        rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
+        false,
+    );
     let emitter = BufferEmitter { buffer: Lrc::clone(&buffer), fallback_bundle };
 
     let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
@@ -73,7 +74,6 @@ fn check_rust_syntax(
             return;
         };
 
-    let hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_id);
     let empty_block = code_block.lang_string == Default::default() && code_block.is_fenced;
     let is_ignore = code_block.lang_string.ignore != markdown::Ignore::None;
 
@@ -93,6 +93,7 @@ fn check_rust_syntax(
     // Finally build and emit the completed diagnostic.
     // All points of divergence have been handled earlier so this can be
     // done the same way whether the span is precise or not.
+    let hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_id);
     cx.tcx.struct_span_lint_hir(crate::lint::INVALID_RUST_CODEBLOCKS, hir_id, sp, msg, |lint| {
         let explanation = if is_ignore {
             "`ignore` code blocks require valid Rust code for syntax highlighting; \
diff --git a/src/librustdoc/passes/lint/html_tags.rs b/src/librustdoc/passes/lint/html_tags.rs
index 070c0aab5..4f72df5a5 100644
--- a/src/librustdoc/passes/lint/html_tags.rs
+++ b/src/librustdoc/passes/lint/html_tags.rs
@@ -113,7 +113,7 @@ pub(crate) fn visit_item(cx: &DocContext<'_>, item: &Item) {
             if let Some(link) =
                 link_names.iter().find(|link| *link.original_text == *broken_link.reference)
             {
-                Some((link.href.as_str().into(), link.new_text.as_str().into()))
+                Some((link.href.as_str().into(), link.new_text.to_string().into()))
             } else if matches!(
                 &broken_link.link_type,
                 LinkType::Reference | LinkType::ReferenceUnknown
@@ -210,11 +210,9 @@ fn extract_path_backwards(text: &str, end_pos: usize) -> Option<usize> {
             .take_while(|(_, c)| is_id_start(*c) || is_id_continue(*c))
             .reduce(|_accum, item| item)
             .and_then(|(new_pos, c)| is_id_start(c).then_some(new_pos));
-        if let Some(new_pos) = new_pos {
-            if current_pos != new_pos {
-                current_pos = new_pos;
-                continue;
-            }
+        if let Some(new_pos) = new_pos && current_pos != new_pos {
+            current_pos = new_pos;
+            continue;
         }
         break;
     }
diff --git a/src/librustdoc/passes/mod.rs b/src/librustdoc/passes/mod.rs
index 634e70ec9..4b1ff68df 100644
--- a/src/librustdoc/passes/mod.rs
+++ b/src/librustdoc/passes/mod.rs
@@ -2,11 +2,12 @@
 //! process.
 
 use rustc_middle::ty::TyCtxt;
+use rustc_resolve::rustdoc::DocFragmentKind;
 use rustc_span::{InnerSpan, Span, DUMMY_SP};
 use std::ops::Range;
 
 use self::Condition::*;
-use crate::clean::{self, DocFragmentKind};
+use crate::clean;
 use crate::core::DocContext;
 
 mod stripper;
diff --git a/src/librustdoc/passes/propagate_doc_cfg.rs b/src/librustdoc/passes/propagate_doc_cfg.rs
index de3a4b339..a4bc48690 100644
--- a/src/librustdoc/passes/propagate_doc_cfg.rs
+++ b/src/librustdoc/passes/propagate_doc_cfg.rs
@@ -9,6 +9,7 @@ use crate::fold::DocFolder;
 use crate::passes::Pass;
 
 use rustc_hir::def_id::LocalDefId;
+use rustc_middle::ty::DefIdTree;
 
 pub(crate) const PROPAGATE_DOC_CFG: Pass = Pass {
     name: "propagate-doc-cfg",
@@ -41,24 +42,22 @@ impl<'a, 'tcx> CfgPropagator<'a, 'tcx> {
         let Some(def_id) = item.item_id.as_def_id().and_then(|def_id| def_id.as_local())
             else { return };
 
-        let hir = self.cx.tcx.hir();
-        let hir_id = hir.local_def_id_to_hir_id(def_id);
-
         if check_parent {
-            let expected_parent = hir.get_parent_item(hir_id);
+            let expected_parent = self.cx.tcx.opt_local_parent(def_id);
             // If parents are different, it means that `item` is a reexport and we need
             // to compute the actual `cfg` by iterating through its "real" parents.
-            if self.parent == Some(expected_parent.def_id) {
+            if self.parent.is_some() && self.parent == expected_parent {
                 return;
             }
         }
 
         let mut attrs = Vec::new();
-        for (parent_hir_id, _) in hir.parent_iter(hir_id) {
-            if let Some(def_id) = hir.opt_local_def_id(parent_hir_id) {
-                attrs.extend_from_slice(load_attrs(self.cx, def_id.to_def_id()));
-            }
+        let mut next_def_id = def_id;
+        while let Some(parent_def_id) = self.cx.tcx.opt_local_parent(next_def_id) {
+            attrs.extend_from_slice(load_attrs(self.cx, parent_def_id.to_def_id()));
+            next_def_id = parent_def_id;
         }
+
         let (_, cfg) = merge_attrs(self.cx, None, item.attrs.other_attrs.as_slice(), Some(&attrs));
         item.cfg = cfg;
     }
diff --git a/src/librustdoc/passes/strip_hidden.rs b/src/librustdoc/passes/strip_hidden.rs
index e07a788a7..890b3e8d6 100644
--- a/src/librustdoc/passes/strip_hidden.rs
+++ b/src/librustdoc/passes/strip_hidden.rs
@@ -1,4 +1,6 @@
 //! Strip all doc(hidden) items from the output.
+
+use rustc_middle::ty::TyCtxt;
 use rustc_span::symbol::sym;
 use std::mem;
 
@@ -7,6 +9,7 @@ use crate::clean::{Item, ItemIdSet, NestedAttributesExt};
 use crate::core::DocContext;
 use crate::fold::{strip_item, DocFolder};
 use crate::passes::{ImplStripper, Pass};
+use crate::visit_ast::inherits_doc_hidden;
 
 pub(crate) const STRIP_HIDDEN: Pass = Pass {
     name: "strip-hidden",
@@ -21,7 +24,12 @@ pub(crate) fn strip_hidden(krate: clean::Crate, cx: &mut DocContext<'_>) -> clea
 
     // strip all #[doc(hidden)] items
     let krate = {
-        let mut stripper = Stripper { retained: &mut retained, update_retained: true };
+        let mut stripper = Stripper {
+            retained: &mut retained,
+            update_retained: true,
+            tcx: cx.tcx,
+            is_in_hidden_item: false,
+        };
         stripper.fold_crate(krate)
     };
 
@@ -36,40 +44,97 @@ pub(crate) fn strip_hidden(krate: clean::Crate, cx: &mut DocContext<'_>) -> clea
     stripper.fold_crate(krate)
 }
 
-struct Stripper<'a> {
+struct Stripper<'a, 'tcx> {
     retained: &'a mut ItemIdSet,
     update_retained: bool,
+    tcx: TyCtxt<'tcx>,
+    is_in_hidden_item: bool,
 }
 
-impl<'a> DocFolder for Stripper<'a> {
+impl<'a, 'tcx> Stripper<'a, 'tcx> {
+    fn set_is_in_hidden_item_and_fold(&mut self, is_in_hidden_item: bool, i: Item) -> Item {
+        let prev = self.is_in_hidden_item;
+        self.is_in_hidden_item |= is_in_hidden_item;
+        let ret = self.fold_item_recur(i);
+        self.is_in_hidden_item = prev;
+        ret
+    }
+
+    /// In case `i` is a non-hidden impl block, then we special-case it by changing the value
+    /// of `is_in_hidden_item` to `true` because the impl children inherit its visibility.
+    fn recurse_in_impl_or_exported_macro(&mut self, i: Item) -> Item {
+        let prev = mem::replace(&mut self.is_in_hidden_item, false);
+        let ret = self.fold_item_recur(i);
+        self.is_in_hidden_item = prev;
+        ret
+    }
+}
+
+impl<'a, 'tcx> DocFolder for Stripper<'a, 'tcx> {
     fn fold_item(&mut self, i: Item) -> Option<Item> {
-        if i.attrs.lists(sym::doc).has_word(sym::hidden) {
-            debug!("strip_hidden: stripping {:?} {:?}", i.type_(), i.name);
-            // Use a dedicated hidden item for fields, variants, and modules.
-            // We need to keep private fields and variants, so that the docs
-            // can show a placeholder "// some variants omitted". We need to keep
-            // private modules, because they can contain impl blocks, and impl
-            // block privacy is inherited from the type and trait, not from the
-            // module it's defined in. Both of these are marked "stripped," and
-            // not included in the final docs, but since they still have an effect
-            // on the final doc, cannot be completely removed from the Clean IR.
-            match *i.kind {
-                clean::StructFieldItem(..) | clean::ModuleItem(..) | clean::VariantItem(..) => {
-                    // We need to recurse into stripped modules to
-                    // strip things like impl methods but when doing so
-                    // we must not add any items to the `retained` set.
-                    let old = mem::replace(&mut self.update_retained, false);
-                    let ret = strip_item(self.fold_item_recur(i));
-                    self.update_retained = old;
-                    return Some(ret);
-                }
-                _ => return None,
+        let has_doc_hidden = i.attrs.lists(sym::doc).has_word(sym::hidden);
+        let is_impl_or_exported_macro = match *i.kind {
+            clean::ImplItem(..) => true,
+            // If the macro has the `#[macro_export]` attribute, it means it's accessible at the
+            // crate level so it should be handled differently.
+            clean::MacroItem(..) => {
+                i.attrs.other_attrs.iter().any(|attr| attr.has_name(sym::macro_export))
             }
-        } else {
+            _ => false,
+        };
+        let mut is_hidden = has_doc_hidden;
+        if !is_impl_or_exported_macro {
+            is_hidden = self.is_in_hidden_item || has_doc_hidden;
+            if !is_hidden && i.inline_stmt_id.is_none() {
+                // We don't need to check if it's coming from a reexport since the reexport itself was
+                // already checked.
+                is_hidden = i
+                    .item_id
+                    .as_def_id()
+                    .and_then(|def_id| def_id.as_local())
+                    .map(|def_id| inherits_doc_hidden(self.tcx, def_id))
+                    .unwrap_or(false);
+            }
+        }
+        if !is_hidden {
             if self.update_retained {
                 self.retained.insert(i.item_id);
             }
+            return Some(if is_impl_or_exported_macro {
+                self.recurse_in_impl_or_exported_macro(i)
+            } else {
+                self.set_is_in_hidden_item_and_fold(false, i)
+            });
+        }
+        debug!("strip_hidden: stripping {:?} {:?}", i.type_(), i.name);
+        // Use a dedicated hidden item for fields, variants, and modules.
+        // We need to keep private fields and variants, so that the docs
+        // can show a placeholder "// some variants omitted". We need to keep
+        // private modules, because they can contain impl blocks, and impl
+        // block privacy is inherited from the type and trait, not from the
+        // module it's defined in. Both of these are marked "stripped," and
+        // not included in the final docs, but since they still have an effect
+        // on the final doc, cannot be completely removed from the Clean IR.
+        match *i.kind {
+            clean::StructFieldItem(..) | clean::ModuleItem(..) | clean::VariantItem(..) => {
+                // We need to recurse into stripped modules to
+                // strip things like impl methods but when doing so
+                // we must not add any items to the `retained` set.
+                let old = mem::replace(&mut self.update_retained, false);
+                let ret = strip_item(self.set_is_in_hidden_item_and_fold(true, i));
+                self.update_retained = old;
+                Some(ret)
+            }
+            _ => {
+                let ret = self.set_is_in_hidden_item_and_fold(true, i);
+                if has_doc_hidden {
+                    // If the item itself has `#[doc(hidden)]`, then we simply remove it.
+                    None
+                } else {
+                    // However if it's a "descendant" of a `#[doc(hidden)]` item, then we strip it.
+                    Some(strip_item(ret))
+                }
+            }
         }
-        Some(self.fold_item_recur(i))
     }
 }
diff --git a/src/librustdoc/passes/stripper.rs b/src/librustdoc/passes/stripper.rs
index 048ed2646..cba55e5fe 100644
--- a/src/librustdoc/passes/stripper.rs
+++ b/src/librustdoc/passes/stripper.rs
@@ -201,27 +201,25 @@ impl<'a> DocFolder for ImplStripper<'a, '_> {
             // Because we don't inline in `maybe_inline_local` if the output format is JSON,
             // we need to make a special check for JSON output: we want to keep it unless it has
             // a `#[doc(hidden)]` attribute if the `for_` type is exported.
-            if let Some(did) = imp.for_.def_id(self.cache) {
-                if !imp.for_.is_assoc_ty() && !self.should_keep_impl(&i, did) {
-                    debug!("ImplStripper: impl item for stripped type; removing");
-                    return None;
-                }
+            if let Some(did) = imp.for_.def_id(self.cache) &&
+                !imp.for_.is_assoc_ty() && !self.should_keep_impl(&i, did)
+            {
+                debug!("ImplStripper: impl item for stripped type; removing");
+                return None;
             }
-            if let Some(did) = imp.trait_.as_ref().map(|t| t.def_id()) {
-                if !self.should_keep_impl(&i, did) {
-                    debug!("ImplStripper: impl item for stripped trait; removing");
-                    return None;
-                }
+            if let Some(did) = imp.trait_.as_ref().map(|t| t.def_id()) &&
+                !self.should_keep_impl(&i, did) {
+                debug!("ImplStripper: impl item for stripped trait; removing");
+                return None;
             }
             if let Some(generics) = imp.trait_.as_ref().and_then(|t| t.generics()) {
                 for typaram in generics {
-                    if let Some(did) = typaram.def_id(self.cache) {
-                        if !self.should_keep_impl(&i, did) {
-                            debug!(
-                                "ImplStripper: stripped item in trait's generics; removing impl"
-                            );
-                            return None;
-                        }
+                    if let Some(did) = typaram.def_id(self.cache) && !self.should_keep_impl(&i, did)
+                    {
+                        debug!(
+                            "ImplStripper: stripped item in trait's generics; removing impl"
+                        );
+                        return None;
                     }
                 }
             }
diff --git a/src/librustdoc/scrape_examples.rs b/src/librustdoc/scrape_examples.rs
index f2ee99cd9..f28c164d6 100644
--- a/src/librustdoc/scrape_examples.rs
+++ b/src/librustdoc/scrape_examples.rs
@@ -169,7 +169,7 @@ where
                 };
 
                 let ident_span = path.ident.span;
-                (tcx.type_of(def_id), call_span, ident_span)
+                (tcx.type_of(def_id).subst_identity(), call_span, ident_span)
             }
             _ => {
                 return;
diff --git a/src/librustdoc/visit_ast.rs b/src/librustdoc/visit_ast.rs
index 22068ebe0..157e042e4 100644
--- a/src/librustdoc/visit_ast.rs
+++ b/src/librustdoc/visit_ast.rs
@@ -1,13 +1,14 @@
 //! The Rust AST Visitor. Extracts useful information and massages it into a form
 //! usable for `clean`.
 
-use rustc_data_structures::fx::{FxHashMap, FxHashSet};
+use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::def_id::DefId;
-use rustc_hir::Node;
-use rustc_hir::CRATE_HIR_ID;
-use rustc_middle::ty::TyCtxt;
+use rustc_hir::def_id::{DefId, DefIdMap, LocalDefId, LocalDefIdSet};
+use rustc_hir::intravisit::{walk_item, Visitor};
+use rustc_hir::{Node, CRATE_HIR_ID};
+use rustc_middle::hir::nested_filter;
+use rustc_middle::ty::{DefIdTree, TyCtxt};
 use rustc_span::def_id::{CRATE_DEF_ID, LOCAL_CRATE};
 use rustc_span::symbol::{kw, sym, Symbol};
 use rustc_span::Span;
@@ -24,19 +25,30 @@ pub(crate) struct Module<'hir> {
     pub(crate) name: Symbol,
     pub(crate) where_inner: Span,
     pub(crate) mods: Vec<Module<'hir>>,
-    pub(crate) id: hir::HirId,
-    // (item, renamed, import_id)
-    pub(crate) items: Vec<(&'hir hir::Item<'hir>, Option<Symbol>, Option<hir::HirId>)>,
+    pub(crate) def_id: LocalDefId,
+    /// The key is the item `ItemId` and the value is: (item, renamed, import_id).
+    /// We use `FxIndexMap` to keep the insert order.
+    pub(crate) items: FxIndexMap<
+        (LocalDefId, Option<Symbol>),
+        (&'hir hir::Item<'hir>, Option<Symbol>, Option<LocalDefId>),
+    >,
     pub(crate) foreigns: Vec<(&'hir hir::ForeignItem<'hir>, Option<Symbol>)>,
 }
 
 impl Module<'_> {
-    pub(crate) fn new(name: Symbol, id: hir::HirId, where_inner: Span) -> Self {
-        Module { name, id, where_inner, mods: Vec::new(), items: Vec::new(), foreigns: Vec::new() }
+    pub(crate) fn new(name: Symbol, def_id: LocalDefId, where_inner: Span) -> Self {
+        Module {
+            name,
+            def_id,
+            where_inner,
+            mods: Vec::new(),
+            items: FxIndexMap::default(),
+            foreigns: Vec::new(),
+        }
     }
 
     pub(crate) fn where_outer(&self, tcx: TyCtxt<'_>) -> Span {
-        tcx.hir().span(self.id)
+        tcx.def_span(self.def_id)
     }
 }
 
@@ -47,39 +59,54 @@ fn def_id_to_path(tcx: TyCtxt<'_>, did: DefId) -> Vec<Symbol> {
     std::iter::once(crate_name).chain(relative).collect()
 }
 
-pub(crate) fn inherits_doc_hidden(tcx: TyCtxt<'_>, mut node: hir::HirId) -> bool {
-    while let Some(id) = tcx.hir().get_enclosing_scope(node) {
-        node = id;
-        if tcx.hir().attrs(node).lists(sym::doc).has_word(sym::hidden) {
+pub(crate) fn inherits_doc_hidden(tcx: TyCtxt<'_>, mut def_id: LocalDefId) -> bool {
+    let hir = tcx.hir();
+    while let Some(id) = tcx.opt_local_parent(def_id) {
+        def_id = id;
+        if tcx.is_doc_hidden(def_id.to_def_id()) {
             return true;
+        } else if let Some(node) = hir.find_by_def_id(def_id) &&
+            matches!(
+                node,
+                hir::Node::Item(hir::Item { kind: hir::ItemKind::Impl(_), .. }),
+            )
+        {
+            // `impl` blocks stand a bit on their own: unless they have `#[doc(hidden)]` directly
+            // on them, they don't inherit it from the parent context.
+            return false;
         }
     }
     false
 }
 
-// Also, is there some reason that this doesn't use the 'visit'
-// framework from syntax?.
-
 pub(crate) struct RustdocVisitor<'a, 'tcx> {
     cx: &'a mut core::DocContext<'tcx>,
-    view_item_stack: FxHashSet<hir::HirId>,
+    view_item_stack: LocalDefIdSet,
     inlining: bool,
     /// Are the current module and all of its parents public?
     inside_public_path: bool,
-    exact_paths: FxHashMap<DefId, Vec<Symbol>>,
+    exact_paths: DefIdMap<Vec<Symbol>>,
+    modules: Vec<Module<'tcx>>,
 }
 
 impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
     pub(crate) fn new(cx: &'a mut core::DocContext<'tcx>) -> RustdocVisitor<'a, 'tcx> {
         // If the root is re-exported, terminate all recursion.
-        let mut stack = FxHashSet::default();
-        stack.insert(hir::CRATE_HIR_ID);
+        let mut stack = LocalDefIdSet::default();
+        stack.insert(CRATE_DEF_ID);
+        let om = Module::new(
+            cx.tcx.crate_name(LOCAL_CRATE),
+            CRATE_DEF_ID,
+            cx.tcx.hir().root_module().spans.inner_span,
+        );
+
         RustdocVisitor {
             cx,
             view_item_stack: stack,
             inlining: false,
             inside_public_path: true,
-            exact_paths: FxHashMap::default(),
+            exact_paths: Default::default(),
+            modules: vec![om],
         }
     }
 
@@ -89,12 +116,10 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
     }
 
     pub(crate) fn visit(mut self) -> Module<'tcx> {
-        let mut top_level_module = self.visit_mod_contents(
-            hir::CRATE_HIR_ID,
-            self.cx.tcx.hir().root_module(),
-            self.cx.tcx.crate_name(LOCAL_CRATE),
-            None,
-        );
+        let root_module = self.cx.tcx.hir().root_module();
+        self.visit_mod_contents(CRATE_DEF_ID, root_module);
+
+        let mut top_level_module = self.modules.pop().unwrap();
 
         // `#[macro_export] macro_rules!` items are reexported at the top level of the
         // crate, regardless of where they're defined. We want to document the
@@ -109,15 +134,13 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         // macro in the same module.
         let mut inserted = FxHashSet::default();
         for export in self.cx.tcx.module_reexports(CRATE_DEF_ID).unwrap_or(&[]) {
-            if let Res::Def(DefKind::Macro(_), def_id) = export.res {
-                if let Some(local_def_id) = def_id.as_local() {
-                    if self.cx.tcx.has_attr(def_id, sym::macro_export) {
-                        if inserted.insert(def_id) {
-                            let item = self.cx.tcx.hir().expect_item(local_def_id);
-                            top_level_module.items.push((item, None, None));
-                        }
-                    }
-                }
+            if let Res::Def(DefKind::Macro(_), def_id) = export.res &&
+                let Some(local_def_id) = def_id.as_local() &&
+                self.cx.tcx.has_attr(def_id, sym::macro_export) &&
+                inserted.insert(def_id)
+            {
+                    let item = self.cx.tcx.hir().expect_item(local_def_id);
+                    top_level_module.items.insert((local_def_id, Some(item.ident.name)), (item, None, None));
             }
         }
 
@@ -151,24 +174,22 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         top_level_module
     }
 
-    fn visit_mod_contents(
-        &mut self,
-        id: hir::HirId,
-        m: &'tcx hir::Mod<'tcx>,
-        name: Symbol,
-        parent_id: Option<hir::HirId>,
-    ) -> Module<'tcx> {
-        let mut om = Module::new(name, id, m.spans.inner_span);
-        let def_id = self.cx.tcx.hir().local_def_id(id).to_def_id();
+    /// This method will go through the given module items in two passes:
+    /// 1. The items which are not glob imports/reexports.
+    /// 2. The glob imports/reexports.
+    fn visit_mod_contents(&mut self, def_id: LocalDefId, m: &'tcx hir::Mod<'tcx>) {
+        debug!("Going through module {:?}", m);
         // Keep track of if there were any private modules in the path.
         let orig_inside_public_path = self.inside_public_path;
-        self.inside_public_path &= self.cx.tcx.visibility(def_id).is_public();
+        self.inside_public_path &= self.cx.tcx.local_visibility(def_id).is_public();
+
+        // Reimplementation of `walk_mod` because we need to do it in two passes (explanations in
+        // the second loop):
         for &i in m.item_ids {
             let item = self.cx.tcx.hir().item(i);
-            if matches!(item.kind, hir::ItemKind::Use(_, hir::UseKind::Glob)) {
-                continue;
+            if !matches!(item.kind, hir::ItemKind::Use(_, hir::UseKind::Glob)) {
+                self.visit_item(item);
             }
-            self.visit_item(item, None, &mut om, parent_id);
         }
         for &i in m.item_ids {
             let item = self.cx.tcx.hir().item(i);
@@ -176,11 +197,11 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             // Later passes in rustdoc will de-duplicate by name and kind, so if glob-
             // imported items appear last, then they'll be the ones that get discarded.
             if matches!(item.kind, hir::ItemKind::Use(_, hir::UseKind::Glob)) {
-                self.visit_item(item, None, &mut om, parent_id);
+                self.visit_item(item);
             }
         }
         self.inside_public_path = orig_inside_public_path;
-        om
+        debug!("Leaving module {:?}", m);
     }
 
     /// Tries to resolve the target of a `pub use` statement and inlines the
@@ -194,11 +215,10 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
     /// Returns `true` if the target has been inlined.
     fn maybe_inline_local(
         &mut self,
-        id: hir::HirId,
+        def_id: LocalDefId,
         res: Res,
         renamed: Option<Symbol>,
         glob: bool,
-        om: &mut Module<'tcx>,
         please_inline: bool,
     ) -> bool {
         debug!("maybe_inline_local res: {:?}", res);
@@ -208,11 +228,11 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         }
 
         let tcx = self.cx.tcx;
-        let Some(res_did) = res.opt_def_id() else {
+        let Some(ori_res_did) = res.opt_def_id() else {
             return false;
         };
 
-        let use_attrs = tcx.hir().attrs(id);
+        let use_attrs = tcx.hir().attrs(tcx.hir().local_def_id_to_hir_id(def_id));
         // Don't inline `doc(hidden)` imports so they can be stripped at a later stage.
         let is_no_inline = use_attrs.lists(sym::doc).has_word(sym::no_inline)
             || use_attrs.lists(sym::doc).has_word(sym::hidden);
@@ -221,69 +241,82 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         // reachable in documentation -- a previously unreachable item can be
         // made reachable by cross-crate inlining which we're checking here.
         // (this is done here because we need to know this upfront).
-        if !res_did.is_local() && !is_no_inline {
-            crate::visit_lib::lib_embargo_visit_item(self.cx, res_did);
+        if !ori_res_did.is_local() && !is_no_inline {
+            crate::visit_lib::lib_embargo_visit_item(self.cx, ori_res_did);
             return false;
         }
 
-        let res_hir_id = match res_did.as_local() {
-            Some(n) => tcx.hir().local_def_id_to_hir_id(n),
-            None => return false,
+        let Some(res_did) = ori_res_did.as_local() else {
+            return false;
         };
 
         let is_private =
-            !self.cx.cache.effective_visibilities.is_directly_public(self.cx.tcx, res_did);
-        let is_hidden = inherits_doc_hidden(self.cx.tcx, res_hir_id);
+            !self.cx.cache.effective_visibilities.is_directly_public(self.cx.tcx, ori_res_did);
+        let is_hidden = inherits_doc_hidden(self.cx.tcx, res_did);
 
         // Only inline if requested or if the item would otherwise be stripped.
         if (!please_inline && !is_private && !is_hidden) || is_no_inline {
             return false;
         }
 
-        if !self.view_item_stack.insert(res_hir_id) {
+        if !self.view_item_stack.insert(res_did) {
             return false;
         }
 
-        let ret = match tcx.hir().get(res_hir_id) {
+        let ret = match tcx.hir().get_by_def_id(res_did) {
             Node::Item(&hir::Item { kind: hir::ItemKind::Mod(ref m), .. }) if glob => {
                 let prev = mem::replace(&mut self.inlining, true);
                 for &i in m.item_ids {
                     let i = self.cx.tcx.hir().item(i);
-                    self.visit_item(i, None, om, Some(id));
+                    self.visit_item_inner(i, None, Some(def_id));
                 }
                 self.inlining = prev;
                 true
             }
             Node::Item(it) if !glob => {
                 let prev = mem::replace(&mut self.inlining, true);
-                self.visit_item(it, renamed, om, Some(id));
+                self.visit_item_inner(it, renamed, Some(def_id));
                 self.inlining = prev;
                 true
             }
             Node::ForeignItem(it) if !glob => {
                 let prev = mem::replace(&mut self.inlining, true);
-                self.visit_foreign_item(it, renamed, om);
+                self.visit_foreign_item_inner(it, renamed);
                 self.inlining = prev;
                 true
             }
             _ => false,
         };
-        self.view_item_stack.remove(&res_hir_id);
+        self.view_item_stack.remove(&res_did);
         ret
     }
 
-    fn visit_item(
+    #[inline]
+    fn add_to_current_mod(
         &mut self,
         item: &'tcx hir::Item<'_>,
         renamed: Option<Symbol>,
-        om: &mut Module<'tcx>,
-        parent_id: Option<hir::HirId>,
+        parent_id: Option<LocalDefId>,
     ) {
+        self.modules
+            .last_mut()
+            .unwrap()
+            .items
+            .insert((item.owner_id.def_id, renamed), (item, renamed, parent_id));
+    }
+
+    fn visit_item_inner(
+        &mut self,
+        item: &'tcx hir::Item<'_>,
+        renamed: Option<Symbol>,
+        import_id: Option<LocalDefId>,
+    ) -> bool {
         debug!("visiting item {:?}", item);
         let name = renamed.unwrap_or(item.ident.name);
+        let tcx = self.cx.tcx;
 
         let def_id = item.owner_id.to_def_id();
-        let is_pub = self.cx.tcx.visibility(def_id).is_public();
+        let is_pub = tcx.visibility(def_id).is_public();
 
         if is_pub {
             self.store_path(item.owner_id.to_def_id());
@@ -292,8 +325,8 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         match item.kind {
             hir::ItemKind::ForeignMod { items, .. } => {
                 for item in items {
-                    let item = self.cx.tcx.hir().foreign_item(item.id);
-                    self.visit_foreign_item(item, None, om);
+                    let item = tcx.hir().foreign_item(item.id);
+                    self.visit_foreign_item_inner(item, None);
                 }
             }
             // If we're inlining, skip private items or item reexported as "_".
@@ -308,7 +341,8 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                         continue;
                     }
 
-                    let attrs = self.cx.tcx.hir().attrs(item.hir_id());
+                    let attrs =
+                        tcx.hir().attrs(tcx.hir().local_def_id_to_hir_id(item.owner_id.def_id));
 
                     // If there was a private module in the current path then don't bother inlining
                     // anything as it will probably be stripped anyway.
@@ -322,18 +356,17 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                         let is_glob = kind == hir::UseKind::Glob;
                         let ident = if is_glob { None } else { Some(name) };
                         if self.maybe_inline_local(
-                            item.hir_id(),
+                            item.owner_id.def_id,
                             res,
                             ident,
                             is_glob,
-                            om,
                             please_inline,
                         ) {
                             continue;
                         }
                     }
 
-                    om.items.push((item, renamed, parent_id))
+                    self.add_to_current_mod(item, renamed, import_id);
                 }
             }
             hir::ItemKind::Macro(ref macro_def, _) => {
@@ -350,14 +383,14 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
 
                 let def_id = item.owner_id.to_def_id();
                 let is_macro_2_0 = !macro_def.macro_rules;
-                let nonexported = !self.cx.tcx.has_attr(def_id, sym::macro_export);
+                let nonexported = !tcx.has_attr(def_id, sym::macro_export);
 
                 if is_macro_2_0 || nonexported || self.inlining {
-                    om.items.push((item, renamed, None));
+                    self.add_to_current_mod(item, renamed, import_id);
                 }
             }
             hir::ItemKind::Mod(ref m) => {
-                om.mods.push(self.visit_mod_contents(item.hir_id(), m, name, parent_id));
+                self.enter_mod(item.owner_id.def_id, m, name);
             }
             hir::ItemKind::Fn(..)
             | hir::ItemKind::ExternCrate(..)
@@ -365,36 +398,98 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             | hir::ItemKind::Struct(..)
             | hir::ItemKind::Union(..)
             | hir::ItemKind::TyAlias(..)
-            | hir::ItemKind::OpaqueTy(..)
+            | hir::ItemKind::OpaqueTy(hir::OpaqueTy {
+                origin: hir::OpaqueTyOrigin::TyAlias, ..
+            })
             | hir::ItemKind::Static(..)
             | hir::ItemKind::Trait(..)
-            | hir::ItemKind::TraitAlias(..) => om.items.push((item, renamed, parent_id)),
+            | hir::ItemKind::TraitAlias(..) => {
+                self.add_to_current_mod(item, renamed, import_id);
+            }
+            hir::ItemKind::OpaqueTy(hir::OpaqueTy {
+                origin: hir::OpaqueTyOrigin::AsyncFn(_) | hir::OpaqueTyOrigin::FnReturn(_),
+                ..
+            }) => {
+                // return-position impl traits are never nameable, and should never be documented.
+            }
             hir::ItemKind::Const(..) => {
                 // Underscore constants do not correspond to a nameable item and
                 // so are never useful in documentation.
                 if name != kw::Underscore {
-                    om.items.push((item, renamed, parent_id));
+                    self.add_to_current_mod(item, renamed, import_id);
                 }
             }
             hir::ItemKind::Impl(impl_) => {
                 // Don't duplicate impls when inlining or if it's implementing a trait, we'll pick
                 // them up regardless of where they're located.
                 if !self.inlining && impl_.of_trait.is_none() {
-                    om.items.push((item, None, None));
+                    self.add_to_current_mod(item, None, None);
                 }
             }
         }
+        true
     }
 
-    fn visit_foreign_item(
+    fn visit_foreign_item_inner(
         &mut self,
         item: &'tcx hir::ForeignItem<'_>,
         renamed: Option<Symbol>,
-        om: &mut Module<'tcx>,
     ) {
         // If inlining we only want to include public functions.
         if !self.inlining || self.cx.tcx.visibility(item.owner_id).is_public() {
-            om.foreigns.push((item, renamed));
+            self.modules.last_mut().unwrap().foreigns.push((item, renamed));
+        }
+    }
+
+    /// This method will create a new module and push it onto the "modules stack" then call
+    /// `visit_mod_contents`. Once done, it'll remove it from the "modules stack" and instead
+    /// add into the list of modules of the current module.
+    fn enter_mod(&mut self, id: LocalDefId, m: &'tcx hir::Mod<'tcx>, name: Symbol) {
+        self.modules.push(Module::new(name, id, m.spans.inner_span));
+
+        self.visit_mod_contents(id, m);
+
+        let last = self.modules.pop().unwrap();
+        self.modules.last_mut().unwrap().mods.push(last);
+    }
+}
+
+// We need to implement this visitor so it'll go everywhere and retrieve items we're interested in
+// such as impl blocks in const blocks.
+impl<'a, 'tcx> Visitor<'tcx> for RustdocVisitor<'a, 'tcx> {
+    type NestedFilter = nested_filter::All;
+
+    fn nested_visit_map(&mut self) -> Self::Map {
+        self.cx.tcx.hir()
+    }
+
+    fn visit_item(&mut self, i: &'tcx hir::Item<'tcx>) {
+        if self.visit_item_inner(i, None, None) {
+            walk_item(self, i);
         }
     }
+
+    fn visit_mod(&mut self, _: &hir::Mod<'tcx>, _: Span, _: hir::HirId) {
+        // Handled in `visit_item_inner`
+    }
+
+    fn visit_use(&mut self, _: &hir::UsePath<'tcx>, _: hir::HirId) {
+        // Handled in `visit_item_inner`
+    }
+
+    fn visit_path(&mut self, _: &hir::Path<'tcx>, _: hir::HirId) {
+        // Handled in `visit_item_inner`
+    }
+
+    fn visit_label(&mut self, _: &rustc_ast::Label) {
+        // Unneeded.
+    }
+
+    fn visit_infer(&mut self, _: &hir::InferArg) {
+        // Unneeded.
+    }
+
+    fn visit_lifetime(&mut self, _: &hir::Lifetime) {
+        // Unneeded.
+    }
 }
diff --git a/src/librustdoc/visit_lib.rs b/src/librustdoc/visit_lib.rs
index e490559b0..fd4f92541 100644
--- a/src/librustdoc/visit_lib.rs
+++ b/src/librustdoc/visit_lib.rs
@@ -1,14 +1,13 @@
 use crate::core::DocContext;
-use rustc_data_structures::fx::FxHashSet;
 use rustc_hir::def::DefKind;
-use rustc_hir::def_id::DefId;
+use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_middle::ty::TyCtxt;
 
 // FIXME: this may not be exhaustive, but is sufficient for rustdocs current uses
 
 #[derive(Default)]
 pub(crate) struct RustdocEffectiveVisibilities {
-    extern_public: FxHashSet<DefId>,
+    extern_public: DefIdSet,
 }
 
 macro_rules! define_method {
@@ -43,9 +42,9 @@ pub(crate) fn lib_embargo_visit_item(cx: &mut DocContext<'_>, def_id: DefId) {
 struct LibEmbargoVisitor<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,
     // Effective visibilities for reachable nodes
-    extern_public: &'a mut FxHashSet<DefId>,
+    extern_public: &'a mut DefIdSet,
     // Keeps track of already visited modules, in case a module re-exports its parent
-    visited_mods: FxHashSet<DefId>,
+    visited_mods: DefIdSet,
 }
 
 impl LibEmbargoVisitor<'_, '_> {