Merging upstream version 1.67.1+dfsg1.

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

180 files changed, 3603 insertions, 1413 deletions

diff --git a/src/tools/rust-analyzer/crates/base-db/Cargo.toml b/src/tools/rust-analyzer/crates/base-db/Cargo.toml
index f02a51ab6..a484ecec6 100644
--- a/src/tools/rust-analyzer/crates/base-db/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/base-db/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/cfg/Cargo.toml b/src/tools/rust-analyzer/crates/cfg/Cargo.toml
index ee1ad677a..2857420c2 100644
--- a/src/tools/rust-analyzer/crates/cfg/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/cfg/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/flycheck/Cargo.toml b/src/tools/rust-analyzer/crates/flycheck/Cargo.toml
index 2ad32d248..514d567fc 100644
--- a/src/tools/rust-analyzer/crates/flycheck/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/flycheck/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
@@ -17,6 +17,7 @@ rustc-hash = "1.1.0"
 serde = { version = "1.0.137", features = ["derive"] }
 serde_json = "1.0.86"
 jod-thread = "0.1.2"
+command-group = "1.0.8"
 
 toolchain = { path = "../toolchain", version = "0.0.0" }
 stdx = { path = "../stdx", version = "0.0.0" }
diff --git a/src/tools/rust-analyzer/crates/flycheck/src/lib.rs b/src/tools/rust-analyzer/crates/flycheck/src/lib.rs
index 73c3a48b4..8f93dad06 100644
--- a/src/tools/rust-analyzer/crates/flycheck/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/flycheck/src/lib.rs
@@ -10,11 +10,12 @@ use std::{
     time::Duration,
 };
 
+use command_group::{CommandGroup, GroupChild};
 use crossbeam_channel::{never, select, unbounded, Receiver, Sender};
 use paths::AbsPathBuf;
 use rustc_hash::FxHashMap;
 use serde::Deserialize;
-use stdx::{process::streaming_output, JodChild};
+use stdx::process::streaming_output;
 
 pub use cargo_metadata::diagnostic::{
     Applicability, Diagnostic, DiagnosticCode, DiagnosticLevel, DiagnosticSpan,
@@ -39,7 +40,7 @@ pub enum InvocationLocation {
 pub enum FlycheckConfig {
     CargoCommand {
         command: String,
-        target_triple: Option<String>,
+        target_triples: Vec<String>,
         all_targets: bool,
         no_default_features: bool,
         all_features: bool,
@@ -285,7 +286,7 @@ impl FlycheckActor {
         let (mut cmd, args) = match &self.config {
             FlycheckConfig::CargoCommand {
                 command,
-                target_triple,
+                target_triples,
                 no_default_features,
                 all_targets,
                 all_features,
@@ -295,9 +296,11 @@ impl FlycheckActor {
             } => {
                 let mut cmd = Command::new(toolchain::cargo());
                 cmd.arg(command);
-                cmd.args(&["--workspace", "--message-format=json"]);
+                cmd.current_dir(&self.root);
+                cmd.args(&["--workspace", "--message-format=json", "--manifest-path"])
+                    .arg(self.root.join("Cargo.toml").as_os_str());
 
-                if let Some(target) = target_triple {
+                for target in target_triples {
                     cmd.args(&["--target", target.as_str()]);
                 }
                 if *all_targets {
@@ -357,10 +360,12 @@ impl FlycheckActor {
     }
 }
 
+struct JodChild(GroupChild);
+
 /// A handle to a cargo process used for fly-checking.
 struct CargoHandle {
     /// The handle to the actual cargo process. As we cannot cancel directly from with
-    /// a read syscall dropping and therefor terminating the process is our best option.
+    /// a read syscall dropping and therefore terminating the process is our best option.
     child: JodChild,
     thread: jod_thread::JoinHandle<io::Result<(bool, String)>>,
     receiver: Receiver<CargoMessage>,
@@ -369,10 +374,10 @@ struct CargoHandle {
 impl CargoHandle {
     fn spawn(mut command: Command) -> std::io::Result<CargoHandle> {
         command.stdout(Stdio::piped()).stderr(Stdio::piped()).stdin(Stdio::null());
-        let mut child = JodChild::spawn(command)?;
+        let mut child = command.group_spawn().map(JodChild)?;
 
-        let stdout = child.stdout.take().unwrap();
-        let stderr = child.stderr.take().unwrap();
+        let stdout = child.0.inner().stdout.take().unwrap();
+        let stderr = child.0.inner().stderr.take().unwrap();
 
         let (sender, receiver) = unbounded();
         let actor = CargoActor::new(sender, stdout, stderr);
@@ -384,13 +389,13 @@ impl CargoHandle {
     }
 
     fn cancel(mut self) {
-        let _ = self.child.kill();
-        let _ = self.child.wait();
+        let _ = self.child.0.kill();
+        let _ = self.child.0.wait();
     }
 
     fn join(mut self) -> io::Result<()> {
-        let _ = self.child.kill();
-        let exit_status = self.child.wait()?;
+        let _ = self.child.0.kill();
+        let exit_status = self.child.0.wait()?;
         let (read_at_least_one_message, error) = self.thread.join()?;
         if read_at_least_one_message || exit_status.success() {
             Ok(())
diff --git a/src/tools/rust-analyzer/crates/hir-def/Cargo.toml b/src/tools/rust-analyzer/crates/hir-def/Cargo.toml
index 4ad8e7597..22f98ea7c 100644
--- a/src/tools/rust-analyzer/crates/hir-def/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/hir-def/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/data.rs b/src/tools/rust-analyzer/crates/hir-def/src/data.rs
index 2dc69b00a..9c7696908 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/data.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/data.rs
@@ -236,11 +236,19 @@ impl TraitData {
             .by_key("rustc_skip_array_during_method_dispatch")
             .exists();
 
-        let mut collector =
-            AssocItemCollector::new(db, module_id, tree_id.file_id(), ItemContainerId::TraitId(tr));
-        collector.collect(&item_tree, tree_id.tree_id(), &tr_def.items);
-        let (items, attribute_calls, diagnostics) = collector.finish();
-
+        let (items, attribute_calls, diagnostics) = match &tr_def.items {
+            Some(items) => {
+                let mut collector = AssocItemCollector::new(
+                    db,
+                    module_id,
+                    tree_id.file_id(),
+                    ItemContainerId::TraitId(tr),
+                );
+                collector.collect(&item_tree, tree_id.tree_id(), items);
+                collector.finish()
+            }
+            None => Default::default(),
+        };
         (
             Arc::new(TraitData {
                 name,
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/item_tree.rs b/src/tools/rust-analyzer/crates/hir-def/src/item_tree.rs
index 570344596..0aa531eff 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/item_tree.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/item_tree.rs
@@ -666,7 +666,8 @@ pub struct Trait {
     pub generic_params: Interned<GenericParams>,
     pub is_auto: bool,
     pub is_unsafe: bool,
-    pub items: Box<[AssocItem]>,
+    /// This is [`None`] if this Trait is a trait alias.
+    pub items: Option<Box<[AssocItem]>>,
     pub ast_id: FileAstId<ast::Trait>,
 }
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs
index 077a1b619..b25274bcc 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs
@@ -451,15 +451,7 @@ impl<'a> Ctx<'a> {
                 .collect()
         });
         let ast_id = self.source_ast_id_map.ast_id(trait_def);
-        let res = Trait {
-            name,
-            visibility,
-            generic_params,
-            is_auto,
-            is_unsafe,
-            items: items.unwrap_or_default(),
-            ast_id,
-        };
+        let res = Trait { name, visibility, generic_params, is_auto, is_unsafe, items, ast_id };
         Some(id(self.data().traits.alloc(res)))
     }
 
@@ -662,8 +654,12 @@ fn desugar_future_path(orig: TypeRef) -> Path {
     let mut generic_args: Vec<_> =
         std::iter::repeat(None).take(path.segments().len() - 1).collect();
     let mut last = GenericArgs::empty();
-    let binding =
-        AssociatedTypeBinding { name: name![Output], type_ref: Some(orig), bounds: Vec::new() };
+    let binding = AssociatedTypeBinding {
+        name: name![Output],
+        args: None,
+        type_ref: Some(orig),
+        bounds: Vec::new(),
+    };
     last.bindings.push(binding);
     generic_args.push(Some(Interned::new(last)));
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/pretty.rs b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/pretty.rs
index da1643152..48c40df22 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/pretty.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/pretty.rs
@@ -375,12 +375,21 @@ impl<'a> Printer<'a> {
                 }
                 w!(self, "trait {}", name);
                 self.print_generic_params(generic_params);
-                self.print_where_clause_and_opening_brace(generic_params);
-                self.indented(|this| {
-                    for item in &**items {
-                        this.print_mod_item((*item).into());
+                match items {
+                    Some(items) => {
+                        self.print_where_clause_and_opening_brace(generic_params);
+                        self.indented(|this| {
+                            for item in &**items {
+                                this.print_mod_item((*item).into());
+                            }
+                        });
                     }
-                });
+                    None => {
+                        w!(self, " = ");
+                        // FIXME: Print the aliased traits
+                        self.print_where_clause_and_opening_brace(generic_params);
+                    }
+                }
                 wln!(self, "}}");
             }
             ModItem::Impl(it) => {
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe/matching.rs b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe/matching.rs
index bc162d0fa..fc90c6e9f 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe/matching.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe/matching.rs
@@ -94,11 +94,11 @@ macro_rules! m {
     ($($s:stmt)*) => (stringify!($($s |)*);)
 }
 stringify!(;
-|;
-|92|;
-|let x = 92|;
+| ;
+|92| ;
+|let x = 92| ;
 |loop {}
-|;
+| ;
 |);
 "#]],
     );
@@ -118,7 +118,7 @@ m!(.. .. ..);
 macro_rules! m {
     ($($p:pat)*) => (stringify!($($p |)*);)
 }
-stringify!(.. .. ..|);
+stringify!(.. .. .. |);
 "#]],
     );
 }
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
index 029821e5e..118c14ed8 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
@@ -82,14 +82,14 @@ fn attribute_macro_syntax_completion_2() {
 #[proc_macros::identity_when_valid]
 fn foo() { bar.; blub }
 "#,
-        expect![[r##"
+        expect![[r#"
 #[proc_macros::identity_when_valid]
 fn foo() { bar.; blub }
 
 fn foo() {
-    bar.;
+    bar. ;
     blub
-}"##]],
+}"#]],
     );
 }
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs b/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs
index 9ffc21881..b0dd01f9d 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs
@@ -212,6 +212,7 @@ impl Import {
 
 #[derive(Debug, Eq, PartialEq)]
 struct ImportDirective {
+    /// The module this import directive is in.
     module_id: LocalModuleId,
     import: Import,
     status: PartialResolvedImport,
@@ -963,8 +964,10 @@ impl DefCollector<'_> {
 
     fn update(
         &mut self,
+        // The module for which `resolutions` have been resolve
         module_id: LocalModuleId,
         resolutions: &[(Option<Name>, PerNs)],
+        // Visibility this import will have
         vis: Visibility,
         import_type: ImportType,
     ) {
@@ -974,6 +977,7 @@ impl DefCollector<'_> {
 
     fn update_recursive(
         &mut self,
+        // The module for which `resolutions` have been resolve
         module_id: LocalModuleId,
         resolutions: &[(Option<Name>, PerNs)],
         // All resolutions are imported with this visibility; the visibilities in
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/nameres/path_resolution.rs b/src/tools/rust-analyzer/crates/hir-def/src/nameres/path_resolution.rs
index 8dfda6df6..20d39ec6c 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/nameres/path_resolution.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/nameres/path_resolution.rs
@@ -73,7 +73,10 @@ impl DefMap {
     pub(crate) fn resolve_visibility(
         &self,
         db: &dyn DefDatabase,
+        // module to import to
         original_module: LocalModuleId,
+        // pub(path)
+        //     ^^^^ this
         visibility: &RawVisibility,
     ) -> Option<Visibility> {
         let mut vis = match visibility {
@@ -115,6 +118,7 @@ impl DefMap {
         &self,
         db: &dyn DefDatabase,
         mode: ResolveMode,
+        // module to import to
         mut original_module: LocalModuleId,
         path: &ModPath,
         shadow: BuiltinShadowMode,
@@ -361,6 +365,9 @@ impl DefMap {
                     );
                 }
             };
+
+            curr_per_ns = curr_per_ns
+                .filter_visibility(|vis| vis.is_visible_from_def_map(db, self, original_module));
         }
 
         ResolvePathResult::with(curr_per_ns, ReachedFixedPoint::Yes, None, Some(self.krate))
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests.rs b/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests.rs
index 70dd2eb3a..0d90047c2 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests.rs
@@ -58,9 +58,9 @@ extern {
 "#,
         expect![[r#"
             crate
-            E: t
+            E: _
             S: t v
-            V: t v
+            V: _
             foo: t
 
             crate::foo
@@ -307,7 +307,7 @@ pub struct FromLib;
             Bar: t v
 
             crate::foo
-            Bar: t v
+            Bar: _
             FromLib: t v
         "#]],
     );
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/globs.rs b/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/globs.rs
index b2a6a592c..88a3c7639 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/globs.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/globs.rs
@@ -119,7 +119,7 @@ use foo::*;
 use foo::bar::*;
 
 //- /foo/mod.rs
-mod bar;
+pub mod bar;
 fn Foo() {};
 pub struct Foo {};
 
@@ -132,6 +132,7 @@ pub(crate) struct PubCrateStruct;
             crate
             Foo: t
             PubCrateStruct: t v
+            bar: t
             foo: t
 
             crate::foo
@@ -336,3 +337,33 @@ mod d {
         "#]],
     );
 }
+
+#[test]
+fn glob_name_collision_check_visibility() {
+    check(
+        r#"
+mod event {
+    mod serenity {
+        pub fn Event() {}
+    }
+    use serenity::*;
+
+    pub struct Event {}
+}
+
+use event::Event;
+        "#,
+        expect![[r#"
+            crate
+            Event: t
+            event: t
+
+            crate::event
+            Event: t v
+            serenity: t
+
+            crate::event::serenity
+            Event: v
+        "#]],
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/mod_resolution.rs b/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/mod_resolution.rs
index ba3bf8b5a..c575bf7ca 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/mod_resolution.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/nameres/tests/mod_resolution.rs
@@ -580,7 +580,7 @@ fn module_resolution_decl_inside_inline_module_in_crate_root() {
 //- /main.rs
 mod foo {
     #[path = "baz.rs"]
-    mod bar;
+    pub mod bar;
 }
 use self::foo::bar::Baz;
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/path.rs b/src/tools/rust-analyzer/crates/hir-def/src/path.rs
index 2f13a9fbf..592223f7d 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/path.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/path.rs
@@ -68,6 +68,9 @@ pub struct GenericArgs {
 pub struct AssociatedTypeBinding {
     /// The name of the associated type.
     pub name: Name,
+    /// The generic arguments to the associated type. e.g. For `Trait<Assoc<'a, T> = &'a T>`, this
+    /// would be `['a, T]`.
+    pub args: Option<Interned<GenericArgs>>,
     /// The type bound to this associated type (in `Item = T`, this would be the
     /// `T`). This can be `None` if there are bounds instead.
     pub type_ref: Option<TypeRef>,
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/path/lower.rs b/src/tools/rust-analyzer/crates/hir-def/src/path/lower.rs
index 0428f1a39..cfa3a6baa 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/path/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/path/lower.rs
@@ -163,6 +163,10 @@ pub(super) fn lower_generic_args(
             ast::GenericArg::AssocTypeArg(assoc_type_arg) => {
                 if let Some(name_ref) = assoc_type_arg.name_ref() {
                     let name = name_ref.as_name();
+                    let args = assoc_type_arg
+                        .generic_arg_list()
+                        .and_then(|args| lower_generic_args(lower_ctx, args))
+                        .map(Interned::new);
                     let type_ref = assoc_type_arg.ty().map(|it| TypeRef::from_ast(lower_ctx, it));
                     let bounds = if let Some(l) = assoc_type_arg.type_bound_list() {
                         l.bounds()
@@ -171,7 +175,7 @@ pub(super) fn lower_generic_args(
                     } else {
                         Vec::new()
                     };
-                    bindings.push(AssociatedTypeBinding { name, type_ref, bounds });
+                    bindings.push(AssociatedTypeBinding { name, args, type_ref, bounds });
                 }
             }
             ast::GenericArg::LifetimeArg(lifetime_arg) => {
@@ -214,6 +218,7 @@ fn lower_generic_args_from_fn_path(
         let type_ref = TypeRef::from_ast_opt(ctx, ret_type.ty());
         bindings.push(AssociatedTypeBinding {
             name: name![Output],
+            args: None,
             type_ref: Some(type_ref),
             bounds: Vec::new(),
         });
@@ -222,6 +227,7 @@ fn lower_generic_args_from_fn_path(
         let type_ref = TypeRef::Tuple(Vec::new());
         bindings.push(AssociatedTypeBinding {
             name: name![Output],
+            args: None,
             type_ref: Some(type_ref),
             bounds: Vec::new(),
         });
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/pretty.rs b/src/tools/rust-analyzer/crates/hir-def/src/pretty.rs
index 6636c8a23..933970d10 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/pretty.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/pretty.rs
@@ -143,9 +143,12 @@ pub(crate) fn print_type_ref(type_ref: &TypeRef, buf: &mut dyn Write) -> fmt::Re
             print_type_ref(elem, buf)?;
             write!(buf, "]")?;
         }
-        TypeRef::Fn(args_and_ret, varargs) => {
+        TypeRef::Fn(args_and_ret, varargs, is_unsafe) => {
             let ((_, return_type), args) =
                 args_and_ret.split_last().expect("TypeRef::Fn is missing return type");
+            if *is_unsafe {
+                write!(buf, "unsafe ")?;
+            }
             write!(buf, "fn(")?;
             for (i, (_, typeref)) in args.iter().enumerate() {
                 if i != 0 {
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/type_ref.rs b/src/tools/rust-analyzer/crates/hir-def/src/type_ref.rs
index 5b4c71be7..f8bb78ddc 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/type_ref.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/type_ref.rs
@@ -119,7 +119,7 @@ pub enum TypeRef {
     Array(Box<TypeRef>, ConstScalarOrPath),
     Slice(Box<TypeRef>),
     /// A fn pointer. Last element of the vector is the return type.
-    Fn(Vec<(Option<Name>, TypeRef)>, bool /*varargs*/),
+    Fn(Vec<(Option<Name>, TypeRef)>, bool /*varargs*/, bool /*is_unsafe*/),
     ImplTrait(Vec<Interned<TypeBound>>),
     DynTrait(Vec<Interned<TypeBound>>),
     Macro(AstId<ast::MacroCall>),
@@ -229,7 +229,7 @@ impl TypeRef {
                     Vec::new()
                 };
                 params.push((None, ret_ty));
-                TypeRef::Fn(params, is_varargs)
+                TypeRef::Fn(params, is_varargs, inner.unsafe_token().is_some())
             }
             // for types are close enough for our purposes to the inner type for now...
             ast::Type::ForType(inner) => TypeRef::from_ast_opt(ctx, inner.ty()),
@@ -263,7 +263,7 @@ impl TypeRef {
         fn go(type_ref: &TypeRef, f: &mut impl FnMut(&TypeRef)) {
             f(type_ref);
             match type_ref {
-                TypeRef::Fn(params, _) => {
+                TypeRef::Fn(params, _, _) => {
                     params.iter().for_each(|(_, param_type)| go(param_type, f))
                 }
                 TypeRef::Tuple(types) => types.iter().for_each(|t| go(t, f)),
diff --git a/src/tools/rust-analyzer/crates/hir-expand/Cargo.toml b/src/tools/rust-analyzer/crates/hir-expand/Cargo.toml
index 3359c99b3..77eb1fd45 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/hir-expand/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/fixup.rs b/src/tools/rust-analyzer/crates/hir-expand/src/fixup.rs
index 893e6fe4b..a4abe7562 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/fixup.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/fixup.rs
@@ -4,6 +4,7 @@ use std::mem;
 
 use mbe::{SyntheticToken, SyntheticTokenId, TokenMap};
 use rustc_hash::FxHashMap;
+use smallvec::SmallVec;
 use syntax::{
     ast::{self, AstNode, HasLoopBody},
     match_ast, SyntaxElement, SyntaxKind, SyntaxNode, TextRange,
@@ -292,25 +293,34 @@ pub(crate) fn reverse_fixups(
     token_map: &TokenMap,
     undo_info: &SyntaxFixupUndoInfo,
 ) {
-    tt.token_trees.retain(|tt| match tt {
-        tt::TokenTree::Leaf(leaf) => {
-            token_map.synthetic_token_id(leaf.id()).is_none()
-                || token_map.synthetic_token_id(leaf.id()) != Some(EMPTY_ID)
-        }
-        tt::TokenTree::Subtree(st) => st.delimiter.map_or(true, |d| {
-            token_map.synthetic_token_id(d.id).is_none()
-                || token_map.synthetic_token_id(d.id) != Some(EMPTY_ID)
-        }),
-    });
-    tt.token_trees.iter_mut().for_each(|tt| match tt {
-        tt::TokenTree::Subtree(tt) => reverse_fixups(tt, token_map, undo_info),
-        tt::TokenTree::Leaf(leaf) => {
-            if let Some(id) = token_map.synthetic_token_id(leaf.id()) {
-                let original = &undo_info.original[id.0 as usize];
-                *tt = tt::TokenTree::Subtree(original.clone());
+    let tts = std::mem::take(&mut tt.token_trees);
+    tt.token_trees = tts
+        .into_iter()
+        .filter(|tt| match tt {
+            tt::TokenTree::Leaf(leaf) => token_map.synthetic_token_id(leaf.id()) != Some(EMPTY_ID),
+            tt::TokenTree::Subtree(st) => {
+                st.delimiter.map_or(true, |d| token_map.synthetic_token_id(d.id) != Some(EMPTY_ID))
             }
-        }
-    });
+        })
+        .flat_map(|tt| match tt {
+            tt::TokenTree::Subtree(mut tt) => {
+                reverse_fixups(&mut tt, token_map, undo_info);
+                SmallVec::from_const([tt.into()])
+            }
+            tt::TokenTree::Leaf(leaf) => {
+                if let Some(id) = token_map.synthetic_token_id(leaf.id()) {
+                    let original = undo_info.original[id.0 as usize].clone();
+                    if original.delimiter.is_none() {
+                        original.token_trees.into()
+                    } else {
+                        SmallVec::from_const([original.into()])
+                    }
+                } else {
+                    SmallVec::from_const([leaf.into()])
+                }
+            }
+        })
+        .collect();
 }
 
 #[cfg(test)]
@@ -319,6 +329,31 @@ mod tests {
 
     use super::reverse_fixups;
 
+    // The following three functions are only meant to check partial structural equivalence of
+    // `TokenTree`s, see the last assertion in `check()`.
+    fn check_leaf_eq(a: &tt::Leaf, b: &tt::Leaf) -> bool {
+        match (a, b) {
+            (tt::Leaf::Literal(a), tt::Leaf::Literal(b)) => a.text == b.text,
+            (tt::Leaf::Punct(a), tt::Leaf::Punct(b)) => a.char == b.char,
+            (tt::Leaf::Ident(a), tt::Leaf::Ident(b)) => a.text == b.text,
+            _ => false,
+        }
+    }
+
+    fn check_subtree_eq(a: &tt::Subtree, b: &tt::Subtree) -> bool {
+        a.delimiter.map(|it| it.kind) == b.delimiter.map(|it| it.kind)
+            && a.token_trees.len() == b.token_trees.len()
+            && a.token_trees.iter().zip(&b.token_trees).all(|(a, b)| check_tt_eq(a, b))
+    }
+
+    fn check_tt_eq(a: &tt::TokenTree, b: &tt::TokenTree) -> bool {
+        match (a, b) {
+            (tt::TokenTree::Leaf(a), tt::TokenTree::Leaf(b)) => check_leaf_eq(a, b),
+            (tt::TokenTree::Subtree(a), tt::TokenTree::Subtree(b)) => check_subtree_eq(a, b),
+            _ => false,
+        }
+    }
+
     #[track_caller]
     fn check(ra_fixture: &str, mut expect: Expect) {
         let parsed = syntax::SourceFile::parse(ra_fixture);
@@ -331,17 +366,15 @@ mod tests {
             fixups.append,
         );
 
-        let mut actual = tt.to_string();
-        actual.push('\n');
+        let actual = format!("{}\n", tt);
 
         expect.indent(false);
         expect.assert_eq(&actual);
 
         // the fixed-up tree should be syntactically valid
         let (parse, _) = mbe::token_tree_to_syntax_node(&tt, ::mbe::TopEntryPoint::MacroItems);
-        assert_eq!(
-            parse.errors(),
-            &[],
+        assert!(
+            parse.errors().is_empty(),
             "parse has syntax errors. parse tree:\n{:#?}",
             parse.syntax_node()
         );
@@ -349,9 +382,12 @@ mod tests {
         reverse_fixups(&mut tt, &tmap, &fixups.undo_info);
 
         // the fixed-up + reversed version should be equivalent to the original input
-        // (but token IDs don't matter)
+        // modulo token IDs and `Punct`s' spacing.
         let (original_as_tt, _) = mbe::syntax_node_to_token_tree(&parsed.syntax_node());
-        assert_eq!(tt.to_string(), original_as_tt.to_string());
+        assert!(
+            check_subtree_eq(&tt, &original_as_tt),
+            "different token tree: {tt:?}, {original_as_tt:?}"
+        );
     }
 
     #[test]
@@ -468,7 +504,7 @@ fn foo() {
 }
 "#,
             expect![[r#"
-fn foo () {a .__ra_fixup}
+fn foo () {a . __ra_fixup}
 "#]],
         )
     }
@@ -482,7 +518,7 @@ fn foo() {
 }
 "#,
             expect![[r#"
-fn foo () {a .__ra_fixup ;}
+fn foo () {a . __ra_fixup ;}
 "#]],
         )
     }
@@ -497,7 +533,7 @@ fn foo() {
 }
 "#,
             expect![[r#"
-fn foo () {a .__ra_fixup ; bar () ;}
+fn foo () {a . __ra_fixup ; bar () ;}
 "#]],
         )
     }
@@ -525,7 +561,7 @@ fn foo() {
 }
 "#,
             expect![[r#"
-fn foo () {let x = a .__ra_fixup ;}
+fn foo () {let x = a . __ra_fixup ;}
 "#]],
         )
     }
@@ -541,7 +577,7 @@ fn foo() {
 }
 "#,
             expect![[r#"
-fn foo () {a .b ; bar () ;}
+fn foo () {a . b ; bar () ;}
 "#]],
         )
     }
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/lib.rs b/src/tools/rust-analyzer/crates/hir-expand/src/lib.rs
index a5b499fe8..7352b003a 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/lib.rs
@@ -814,7 +814,7 @@ impl<'a> InFile<&'a SyntaxNode> {
 
     pub fn original_syntax_node(self, db: &dyn db::AstDatabase) -> Option<InFile<SyntaxNode>> {
         // This kind of upmapping can only be achieved in attribute expanded files,
-        // as we don't have node inputs otherwise and  therefor can't find an `N` node in the input
+        // as we don't have node inputs otherwise and therefore can't find an `N` node in the input
         if !self.file_id.is_macro() {
             return Some(self.map(Clone::clone));
         } else if !self.file_id.is_attr_macro(db) {
@@ -926,7 +926,7 @@ impl<N: AstNode> InFile<N> {
 
     pub fn original_ast_node(self, db: &dyn db::AstDatabase) -> Option<InFile<N>> {
         // This kind of upmapping can only be achieved in attribute expanded files,
-        // as we don't have node inputs otherwise and  therefor can't find an `N` node in the input
+        // as we don't have node inputs otherwise and therefore can't find an `N` node in the input
         if !self.file_id.is_macro() {
             return Some(self);
         } else if !self.file_id.is_attr_macro(db) {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/Cargo.toml b/src/tools/rust-analyzer/crates/hir-ty/Cargo.toml
index ed13275ba..a1d6835bf 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/hir-ty/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/chalk_ext.rs b/src/tools/rust-analyzer/crates/hir-ty/src/chalk_ext.rs
index e2099d7e5..996b42f5b 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/chalk_ext.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/chalk_ext.rs
@@ -11,9 +11,9 @@ use syntax::SmolStr;
 
 use crate::{
     db::HirDatabase, from_assoc_type_id, from_chalk_trait_id, from_foreign_def_id,
-    from_placeholder_idx, to_chalk_trait_id, AdtId, AliasEq, AliasTy, Binders, CallableDefId,
-    CallableSig, FnPointer, ImplTraitId, Interner, Lifetime, ProjectionTy, QuantifiedWhereClause,
-    Substitution, TraitRef, Ty, TyBuilder, TyKind, WhereClause,
+    from_placeholder_idx, to_chalk_trait_id, utils::generics, AdtId, AliasEq, AliasTy, Binders,
+    CallableDefId, CallableSig, FnPointer, ImplTraitId, Interner, Lifetime, ProjectionTy,
+    QuantifiedWhereClause, Substitution, TraitRef, Ty, TyBuilder, TyKind, WhereClause,
 };
 
 pub trait TyExt {
@@ -338,10 +338,13 @@ pub trait ProjectionTyExt {
 
 impl ProjectionTyExt for ProjectionTy {
     fn trait_ref(&self, db: &dyn HirDatabase) -> TraitRef {
-        TraitRef {
-            trait_id: to_chalk_trait_id(self.trait_(db)),
-            substitution: self.substitution.clone(),
-        }
+        // FIXME: something like `Split` trait from chalk-solve might be nice.
+        let generics = generics(db.upcast(), from_assoc_type_id(self.associated_ty_id).into());
+        let substitution = Substitution::from_iter(
+            Interner,
+            self.substitution.iter(Interner).skip(generics.len_self()),
+        );
+        TraitRef { trait_id: to_chalk_trait_id(self.trait_(db)), substitution }
     }
 
     fn trait_(&self, db: &dyn HirDatabase) -> TraitId {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/display.rs b/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
index 0221f922f..a22a4b170 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
@@ -289,16 +289,18 @@ impl HirDisplay for ProjectionTy {
             return write!(f, "{}", TYPE_HINT_TRUNCATION);
         }
 
-        let trait_ = f.db.trait_data(self.trait_(f.db));
+        let trait_ref = self.trait_ref(f.db);
         write!(f, "<")?;
-        self.self_type_parameter(f.db).hir_fmt(f)?;
-        write!(f, " as {}", trait_.name)?;
-        if self.substitution.len(Interner) > 1 {
+        fmt_trait_ref(&trait_ref, f, true)?;
+        write!(f, ">::{}", f.db.type_alias_data(from_assoc_type_id(self.associated_ty_id)).name)?;
+        let proj_params_count =
+            self.substitution.len(Interner) - trait_ref.substitution.len(Interner);
+        let proj_params = &self.substitution.as_slice(Interner)[..proj_params_count];
+        if !proj_params.is_empty() {
             write!(f, "<")?;
-            f.write_joined(&self.substitution.as_slice(Interner)[1..], ", ")?;
+            f.write_joined(proj_params, ", ")?;
             write!(f, ">")?;
         }
-        write!(f, ">::{}", f.db.type_alias_data(from_assoc_type_id(self.associated_ty_id)).name)?;
         Ok(())
     }
 }
@@ -641,9 +643,12 @@ impl HirDisplay for Ty {
                 // Use placeholder associated types when the target is test (https://rust-lang.github.io/chalk/book/clauses/type_equality.html#placeholder-associated-types)
                 if f.display_target.is_test() {
                     write!(f, "{}::{}", trait_.name, type_alias_data.name)?;
+                    // Note that the generic args for the associated type come before those for the
+                    // trait (including the self type).
+                    // FIXME: reconsider the generic args order upon formatting?
                     if parameters.len(Interner) > 0 {
                         write!(f, "<")?;
-                        f.write_joined(&*parameters.as_slice(Interner), ", ")?;
+                        f.write_joined(parameters.as_slice(Interner), ", ")?;
                         write!(f, ">")?;
                     }
                 } else {
@@ -972,9 +977,20 @@ fn write_bounds_like_dyn_trait(
                     angle_open = true;
                 }
                 if let AliasTy::Projection(proj) = alias {
-                    let type_alias =
-                        f.db.type_alias_data(from_assoc_type_id(proj.associated_ty_id));
-                    write!(f, "{} = ", type_alias.name)?;
+                    let assoc_ty_id = from_assoc_type_id(proj.associated_ty_id);
+                    let type_alias = f.db.type_alias_data(assoc_ty_id);
+                    write!(f, "{}", type_alias.name)?;
+
+                    let proj_arg_count = generics(f.db.upcast(), assoc_ty_id.into()).len_self();
+                    if proj_arg_count > 0 {
+                        write!(f, "<")?;
+                        f.write_joined(
+                            &proj.substitution.as_slice(Interner)[..proj_arg_count],
+                            ", ",
+                        )?;
+                        write!(f, ">")?;
+                    }
+                    write!(f, " = ")?;
                 }
                 ty.hir_fmt(f)?;
             }
@@ -1171,8 +1187,11 @@ impl HirDisplay for TypeRef {
                 inner.hir_fmt(f)?;
                 write!(f, "]")?;
             }
-            TypeRef::Fn(parameters, is_varargs) => {
+            &TypeRef::Fn(ref parameters, is_varargs, is_unsafe) => {
                 // FIXME: Function pointer qualifiers.
+                if is_unsafe {
+                    write!(f, "unsafe ")?;
+                }
                 write!(f, "fn(")?;
                 if let Some(((_, return_type), function_parameters)) = parameters.split_last() {
                     for index in 0..function_parameters.len() {
@@ -1187,7 +1206,7 @@ impl HirDisplay for TypeRef {
                             write!(f, ", ")?;
                         }
                     }
-                    if *is_varargs {
+                    if is_varargs {
                         write!(f, "{}...", if parameters.len() == 1 { "" } else { ", " })?;
                     }
                     write!(f, ")")?;
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs
index 0efff651c..0b3c23f57 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs
@@ -1020,7 +1020,7 @@ impl Expectation {
     /// The primary use case is where the expected type is a fat pointer,
     /// like `&[isize]`. For example, consider the following statement:
     ///
-    ///    let x: &[isize] = &[1, 2, 3];
+    ///     let x: &[isize] = &[1, 2, 3];
     ///
     /// In this case, the expected type for the `&[1, 2, 3]` expression is
     /// `&[isize]`. If however we were to say that `[1, 2, 3]` has the
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs
index f56108b26..b1f4de826 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs
@@ -85,6 +85,7 @@ impl<'a> InferenceContext<'a> {
         let ty = match &self.body[tgt_expr] {
             Expr::Missing => self.err_ty(),
             &Expr::If { condition, then_branch, else_branch } => {
+                let expected = &expected.adjust_for_branches(&mut self.table);
                 self.infer_expr(
                     condition,
                     &Expectation::has_type(TyKind::Scalar(Scalar::Bool).intern(Interner)),
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs
index 7a4754cdc..ebe9d6fb5 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs
@@ -157,7 +157,7 @@ impl<'a> InferenceContext<'a> {
                     remaining_segments_for_ty,
                     true,
                 );
-                if let TyKind::Error = ty.kind(Interner) {
+                if ty.is_unknown() {
                     return None;
                 }
 
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/unify.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/unify.rs
index b00e3216b..12f45f00f 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/unify.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/unify.rs
@@ -340,8 +340,8 @@ impl<'a> InferenceTable<'a> {
         self.resolve_with_fallback(t, &|_, _, d, _| d)
     }
 
-    /// Unify two types and register new trait goals that arise from that.
-    pub(crate) fn unify(&mut self, ty1: &Ty, ty2: &Ty) -> bool {
+    /// Unify two relatable values (e.g. `Ty`) and register new trait goals that arise from that.
+    pub(crate) fn unify<T: ?Sized + Zip<Interner>>(&mut self, ty1: &T, ty2: &T) -> bool {
         let result = match self.try_unify(ty1, ty2) {
             Ok(r) => r,
             Err(_) => return false,
@@ -350,9 +350,13 @@ impl<'a> InferenceTable<'a> {
         true
     }
 
-    /// Unify two types and return new trait goals arising from it, so the
+    /// Unify two relatable values (e.g. `Ty`) and return new trait goals arising from it, so the
     /// caller needs to deal with them.
-    pub(crate) fn try_unify<T: Zip<Interner>>(&mut self, t1: &T, t2: &T) -> InferResult<()> {
+    pub(crate) fn try_unify<T: ?Sized + Zip<Interner>>(
+        &mut self,
+        t1: &T,
+        t2: &T,
+    ) -> InferResult<()> {
         match self.var_unification_table.relate(
             Interner,
             &self.db,
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs b/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs
index c4b700cbc..39514fc44 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs
@@ -38,10 +38,12 @@ use std::sync::Arc;
 use chalk_ir::{
     fold::{Shift, TypeFoldable},
     interner::HasInterner,
-    NoSolution,
+    NoSolution, UniverseIndex,
 };
 use hir_def::{expr::ExprId, type_ref::Rawness, TypeOrConstParamId};
+use hir_expand::name;
 use itertools::Either;
+use traits::FnTrait;
 use utils::Generics;
 
 use crate::{consteval::unknown_const, db::HirDatabase, utils::generics};
@@ -51,7 +53,7 @@ pub use builder::{ParamKind, TyBuilder};
 pub use chalk_ext::*;
 pub use infer::{
     could_coerce, could_unify, Adjust, Adjustment, AutoBorrow, BindingMode, InferenceDiagnostic,
-    InferenceResult,
+    InferenceResult, OverloadedDeref, PointerCast,
 };
 pub use interner::Interner;
 pub use lower::{
@@ -81,7 +83,20 @@ pub type PlaceholderIndex = chalk_ir::PlaceholderIndex;
 pub type VariableKind = chalk_ir::VariableKind<Interner>;
 pub type VariableKinds = chalk_ir::VariableKinds<Interner>;
 pub type CanonicalVarKinds = chalk_ir::CanonicalVarKinds<Interner>;
+/// Represents generic parameters and an item bound by them. When the item has parent, the binders
+/// also contain the generic parameters for its parent. See chalk's documentation for details.
+///
+/// One thing to keep in mind when working with `Binders` (and `Substitution`s, which represent
+/// generic arguments) in rust-analyzer is that the ordering within *is* significant - the generic
+/// parameters/arguments for an item MUST come before those for its parent. This is to facilitate
+/// the integration with chalk-solve, which mildly puts constraints as such. See #13335 for its
+/// motivation in detail.
 pub type Binders<T> = chalk_ir::Binders<T>;
+/// Interned list of generic arguments for an item. When an item has parent, the `Substitution` for
+/// it contains generic arguments for both its parent and itself. See chalk's documentation for
+/// details.
+///
+/// See `Binders` for the constraint on the ordering.
 pub type Substitution = chalk_ir::Substitution<Interner>;
 pub type GenericArg = chalk_ir::GenericArg<Interner>;
 pub type GenericArgData = chalk_ir::GenericArgData<Interner>;
@@ -124,14 +139,6 @@ pub type ConstrainedSubst = chalk_ir::ConstrainedSubst<Interner>;
 pub type Guidance = chalk_solve::Guidance<Interner>;
 pub type WhereClause = chalk_ir::WhereClause<Interner>;
 
-// FIXME: get rid of this
-pub fn subst_prefix(s: &Substitution, n: usize) -> Substitution {
-    Substitution::from_iter(
-        Interner,
-        s.as_slice(Interner)[..std::cmp::min(s.len(Interner), n)].iter().cloned(),
-    )
-}
-
 /// Return an index of a parameter in the generic type parameter list by it's id.
 pub fn param_idx(db: &dyn HirDatabase, id: TypeOrConstParamId) -> Option<usize> {
     generics(db.upcast(), id.parent).param_idx(id)
@@ -203,6 +210,7 @@ pub(crate) fn make_binders<T: HasInterner<Interner = Interner>>(
 pub struct CallableSig {
     params_and_return: Arc<[Ty]>,
     is_varargs: bool,
+    safety: Safety,
 }
 
 has_interner!(CallableSig);
@@ -211,9 +219,14 @@ has_interner!(CallableSig);
 pub type PolyFnSig = Binders<CallableSig>;
 
 impl CallableSig {
-    pub fn from_params_and_return(mut params: Vec<Ty>, ret: Ty, is_varargs: bool) -> CallableSig {
+    pub fn from_params_and_return(
+        mut params: Vec<Ty>,
+        ret: Ty,
+        is_varargs: bool,
+        safety: Safety,
+    ) -> CallableSig {
         params.push(ret);
-        CallableSig { params_and_return: params.into(), is_varargs }
+        CallableSig { params_and_return: params.into(), is_varargs, safety }
     }
 
     pub fn from_fn_ptr(fn_ptr: &FnPointer) -> CallableSig {
@@ -230,13 +243,14 @@ impl CallableSig {
                 .map(|arg| arg.assert_ty_ref(Interner).clone())
                 .collect(),
             is_varargs: fn_ptr.sig.variadic,
+            safety: fn_ptr.sig.safety,
         }
     }
 
     pub fn to_fn_ptr(&self) -> FnPointer {
         FnPointer {
             num_binders: 0,
-            sig: FnSig { abi: (), safety: Safety::Safe, variadic: self.is_varargs },
+            sig: FnSig { abi: (), safety: self.safety, variadic: self.is_varargs },
             substitution: FnSubst(Substitution::from_iter(
                 Interner,
                 self.params_and_return.iter().cloned(),
@@ -261,7 +275,11 @@ impl TypeFoldable<Interner> for CallableSig {
     ) -> Result<Self, E> {
         let vec = self.params_and_return.to_vec();
         let folded = vec.try_fold_with(folder, outer_binder)?;
-        Ok(CallableSig { params_and_return: folded.into(), is_varargs: self.is_varargs })
+        Ok(CallableSig {
+            params_and_return: folded.into(),
+            is_varargs: self.is_varargs,
+            safety: self.safety,
+        })
     }
 }
 
@@ -382,7 +400,6 @@ pub(crate) fn fold_tys_and_consts<T: HasInterner<Interner = Interner> + TypeFold
 pub fn replace_errors_with_variables<T>(t: &T) -> Canonical<T>
 where
     T: HasInterner<Interner = Interner> + TypeFoldable<Interner> + Clone,
-    T: HasInterner<Interner = Interner>,
 {
     use chalk_ir::{
         fold::{FallibleTypeFolder, TypeSuperFoldable},
@@ -504,3 +521,64 @@ where
     });
     Canonical { value, binders: chalk_ir::CanonicalVarKinds::from_iter(Interner, kinds) }
 }
+
+pub fn callable_sig_from_fnonce(
+    self_ty: &Ty,
+    env: Arc<TraitEnvironment>,
+    db: &dyn HirDatabase,
+) -> Option<CallableSig> {
+    let krate = env.krate;
+    let fn_once_trait = FnTrait::FnOnce.get_id(db, krate)?;
+    let output_assoc_type = db.trait_data(fn_once_trait).associated_type_by_name(&name![Output])?;
+
+    let b = TyBuilder::trait_ref(db, fn_once_trait);
+    if b.remaining() != 2 {
+        return None;
+    }
+    let fn_once = b.push(self_ty.clone()).fill_with_bound_vars(DebruijnIndex::INNERMOST, 0).build();
+    let kinds = fn_once
+        .substitution
+        .iter(Interner)
+        .skip(1)
+        .map(|x| {
+            let vk = match x.data(Interner) {
+                chalk_ir::GenericArgData::Ty(_) => {
+                    chalk_ir::VariableKind::Ty(chalk_ir::TyVariableKind::General)
+                }
+                chalk_ir::GenericArgData::Lifetime(_) => chalk_ir::VariableKind::Lifetime,
+                chalk_ir::GenericArgData::Const(c) => {
+                    chalk_ir::VariableKind::Const(c.data(Interner).ty.clone())
+                }
+            };
+            chalk_ir::WithKind::new(vk, UniverseIndex::ROOT)
+        })
+        .collect::<Vec<_>>();
+
+    // FIXME: chalk refuses to solve `<Self as FnOnce<^0.0>>::Output == ^0.1`, so we first solve
+    // `<Self as FnOnce<^0.0>>` and then replace `^0.0` with the concrete argument tuple.
+    let trait_env = env.env.clone();
+    let obligation = InEnvironment { goal: fn_once.cast(Interner), environment: trait_env };
+    let canonical =
+        Canonical { binders: CanonicalVarKinds::from_iter(Interner, kinds), value: obligation };
+    let subst = match db.trait_solve(krate, canonical) {
+        Some(Solution::Unique(vars)) => vars.value.subst,
+        _ => return None,
+    };
+    let args = subst.at(Interner, 0).ty(Interner)?;
+    let params = match args.kind(Interner) {
+        chalk_ir::TyKind::Tuple(_, subst) => {
+            subst.iter(Interner).filter_map(|arg| arg.ty(Interner).cloned()).collect::<Vec<_>>()
+        }
+        _ => return None,
+    };
+
+    let fn_once =
+        TyBuilder::trait_ref(db, fn_once_trait).push(self_ty.clone()).push(args.clone()).build();
+    let projection =
+        TyBuilder::assoc_type_projection(db, output_assoc_type, Some(fn_once.substitution.clone()))
+            .build();
+
+    let ret_ty = db.normalize_projection(projection, env);
+
+    Some(CallableSig::from_params_and_return(params, ret_ty.clone(), false, Safety::Safe))
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs b/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs
index 223d705b1..baf9842d5 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs
@@ -227,13 +227,17 @@ impl<'a> TyLoweringContext<'a> {
                     .intern(Interner)
             }
             TypeRef::Placeholder => TyKind::Error.intern(Interner),
-            TypeRef::Fn(params, is_varargs) => {
+            &TypeRef::Fn(ref params, variadic, is_unsafe) => {
                 let substs = self.with_shifted_in(DebruijnIndex::ONE, |ctx| {
                     Substitution::from_iter(Interner, params.iter().map(|(_, tr)| ctx.lower_ty(tr)))
                 });
                 TyKind::Function(FnPointer {
                     num_binders: 0, // FIXME lower `for<'a> fn()` correctly
-                    sig: FnSig { abi: (), safety: Safety::Safe, variadic: *is_varargs },
+                    sig: FnSig {
+                        abi: (),
+                        safety: if is_unsafe { Safety::Unsafe } else { Safety::Safe },
+                        variadic,
+                    },
                     substitution: FnSubst(substs),
                 })
                 .intern(Interner)
@@ -447,12 +451,31 @@ impl<'a> TyLoweringContext<'a> {
                             .db
                             .trait_data(trait_ref.hir_trait_id())
                             .associated_type_by_name(segment.name);
+
                         match found {
                             Some(associated_ty) => {
-                                // FIXME handle type parameters on the segment
+                                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
+                                // generic params. It's inefficient to splice the `Substitution`s, so we may want
+                                // that method to optionally take parent `Substitution` as we already know them at
+                                // this point (`trait_ref.substitution`).
+                                let substitution = self.substs_from_path_segment(
+                                    segment,
+                                    Some(associated_ty.into()),
+                                    false,
+                                    None,
+                                );
+                                let len_self =
+                                    generics(self.db.upcast(), associated_ty.into()).len_self();
+                                let substitution = Substitution::from_iter(
+                                    Interner,
+                                    substitution
+                                        .iter(Interner)
+                                        .take(len_self)
+                                        .chain(trait_ref.substitution.iter(Interner)),
+                                );
                                 TyKind::Alias(AliasTy::Projection(ProjectionTy {
                                     associated_ty_id: to_assoc_type_id(associated_ty),
-                                    substitution: trait_ref.substitution,
+                                    substitution,
                                 }))
                                 .intern(Interner)
                             }
@@ -590,36 +613,48 @@ impl<'a> TyLoweringContext<'a> {
             res,
             Some(segment.name.clone()),
             move |name, t, associated_ty| {
-                if name == segment.name {
-                    let substs = match self.type_param_mode {
-                        ParamLoweringMode::Placeholder => {
-                            // if we're lowering to placeholders, we have to put
-                            // them in now
-                            let generics = generics(
-                                self.db.upcast(),
-                                self.resolver
-                                    .generic_def()
-                                    .expect("there should be generics if there's a generic param"),
-                            );
-                            let s = generics.placeholder_subst(self.db);
-                            s.apply(t.substitution.clone(), Interner)
-                        }
-                        ParamLoweringMode::Variable => t.substitution.clone(),
-                    };
-                    // We need to shift in the bound vars, since
-                    // associated_type_shorthand_candidates does not do that
-                    let substs = substs.shifted_in_from(Interner, self.in_binders);
-                    // FIXME handle type parameters on the segment
-                    Some(
-                        TyKind::Alias(AliasTy::Projection(ProjectionTy {
-                            associated_ty_id: to_assoc_type_id(associated_ty),
-                            substitution: substs,
-                        }))
-                        .intern(Interner),
-                    )
-                } else {
-                    None
+                if name != segment.name {
+                    return None;
                 }
+
+                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
+                // generic params. It's inefficient to splice the `Substitution`s, so we may want
+                // that method to optionally take parent `Substitution` as we already know them at
+                // this point (`t.substitution`).
+                let substs = self.substs_from_path_segment(
+                    segment.clone(),
+                    Some(associated_ty.into()),
+                    false,
+                    None,
+                );
+
+                let len_self = generics(self.db.upcast(), associated_ty.into()).len_self();
+
+                let substs = Substitution::from_iter(
+                    Interner,
+                    substs.iter(Interner).take(len_self).chain(t.substitution.iter(Interner)),
+                );
+
+                let substs = match self.type_param_mode {
+                    ParamLoweringMode::Placeholder => {
+                        // if we're lowering to placeholders, we have to put
+                        // them in now
+                        let generics = generics(self.db.upcast(), def);
+                        let s = generics.placeholder_subst(self.db);
+                        s.apply(substs, Interner)
+                    }
+                    ParamLoweringMode::Variable => substs,
+                };
+                // We need to shift in the bound vars, since
+                // associated_type_shorthand_candidates does not do that
+                let substs = substs.shifted_in_from(Interner, self.in_binders);
+                Some(
+                    TyKind::Alias(AliasTy::Projection(ProjectionTy {
+                        associated_ty_id: to_assoc_type_id(associated_ty),
+                        substitution: substs,
+                    }))
+                    .intern(Interner),
+                )
             },
         );
 
@@ -777,7 +812,15 @@ impl<'a> TyLoweringContext<'a> {
         // handle defaults. In expression or pattern path segments without
         // explicitly specified type arguments, missing type arguments are inferred
         // (i.e. defaults aren't used).
-        if !infer_args || had_explicit_args {
+        // Generic parameters for associated types are not supposed to have defaults, so we just
+        // ignore them.
+        let is_assoc_ty = if let GenericDefId::TypeAliasId(id) = def {
+            let container = id.lookup(self.db.upcast()).container;
+            matches!(container, ItemContainerId::TraitId(_))
+        } else {
+            false
+        };
+        if !is_assoc_ty && (!infer_args || had_explicit_args) {
             let defaults = self.db.generic_defaults(def);
             assert_eq!(total_len, defaults.len());
             let parent_from = item_len - substs.len();
@@ -966,9 +1009,28 @@ impl<'a> TyLoweringContext<'a> {
                     None => return SmallVec::new(),
                     Some(t) => t,
                 };
+                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
+                // generic params. It's inefficient to splice the `Substitution`s, so we may want
+                // that method to optionally take parent `Substitution` as we already know them at
+                // this point (`super_trait_ref.substitution`).
+                let substitution = self.substs_from_path_segment(
+                    // FIXME: This is hack. We shouldn't really build `PathSegment` directly.
+                    PathSegment { name: &binding.name, args_and_bindings: binding.args.as_deref() },
+                    Some(associated_ty.into()),
+                    false, // this is not relevant
+                    Some(super_trait_ref.self_type_parameter(Interner)),
+                );
+                let self_params = generics(self.db.upcast(), associated_ty.into()).len_self();
+                let substitution = Substitution::from_iter(
+                    Interner,
+                    substitution
+                        .iter(Interner)
+                        .take(self_params)
+                        .chain(super_trait_ref.substitution.iter(Interner)),
+                );
                 let projection_ty = ProjectionTy {
                     associated_ty_id: to_assoc_type_id(associated_ty),
-                    substitution: super_trait_ref.substitution,
+                    substitution,
                 };
                 let mut preds: SmallVec<[_; 1]> = SmallVec::with_capacity(
                     binding.type_ref.as_ref().map_or(0, |_| 1) + binding.bounds.len(),
@@ -1515,7 +1577,12 @@ fn fn_sig_for_fn(db: &dyn HirDatabase, def: FunctionId) -> PolyFnSig {
         .with_type_param_mode(ParamLoweringMode::Variable);
     let ret = ctx_ret.lower_ty(&data.ret_type);
     let generics = generics(db.upcast(), def.into());
-    let sig = CallableSig::from_params_and_return(params, ret, data.is_varargs());
+    let sig = CallableSig::from_params_and_return(
+        params,
+        ret,
+        data.is_varargs(),
+        if data.has_unsafe_kw() { Safety::Unsafe } else { Safety::Safe },
+    );
     make_binders(db, &generics, sig)
 }
 
@@ -1559,7 +1626,7 @@ fn fn_sig_for_struct_constructor(db: &dyn HirDatabase, def: StructId) -> PolyFnS
         TyLoweringContext::new(db, &resolver).with_type_param_mode(ParamLoweringMode::Variable);
     let params = fields.iter().map(|(_, field)| ctx.lower_ty(&field.type_ref)).collect::<Vec<_>>();
     let (ret, binders) = type_for_adt(db, def.into()).into_value_and_skipped_binders();
-    Binders::new(binders, CallableSig::from_params_and_return(params, ret, false))
+    Binders::new(binders, CallableSig::from_params_and_return(params, ret, false, Safety::Safe))
 }
 
 /// Build the type of a tuple struct constructor.
@@ -1586,7 +1653,7 @@ fn fn_sig_for_enum_variant_constructor(db: &dyn HirDatabase, def: EnumVariantId)
         TyLoweringContext::new(db, &resolver).with_type_param_mode(ParamLoweringMode::Variable);
     let params = fields.iter().map(|(_, field)| ctx.lower_ty(&field.type_ref)).collect::<Vec<_>>();
     let (ret, binders) = type_for_adt(db, def.parent.into()).into_value_and_skipped_binders();
-    Binders::new(binders, CallableSig::from_params_and_return(params, ret, false))
+    Binders::new(binders, CallableSig::from_params_and_return(params, ret, false, Safety::Safe))
 }
 
 /// Build the type of a tuple enum variant constructor.
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/method_resolution.rs b/src/tools/rust-analyzer/crates/hir-ty/src/method_resolution.rs
index 3a1a3f4fd..8bcfa2728 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/method_resolution.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/method_resolution.rs
@@ -22,10 +22,10 @@ use crate::{
     from_foreign_def_id,
     infer::{unify::InferenceTable, Adjust, Adjustment, AutoBorrow, OverloadedDeref, PointerCast},
     primitive::{FloatTy, IntTy, UintTy},
-    static_lifetime,
+    static_lifetime, to_chalk_trait_id,
     utils::all_super_traits,
     AdtId, Canonical, CanonicalVarKinds, DebruijnIndex, ForeignDefId, InEnvironment, Interner,
-    Scalar, TraitEnvironment, TraitRefExt, Ty, TyBuilder, TyExt, TyKind,
+    Scalar, Substitution, TraitEnvironment, TraitRef, TraitRefExt, Ty, TyBuilder, TyExt, TyKind,
 };
 
 /// This is used as a key for indexing impls.
@@ -541,7 +541,7 @@ pub struct ReceiverAdjustments {
 
 impl ReceiverAdjustments {
     pub(crate) fn apply(&self, table: &mut InferenceTable<'_>, ty: Ty) -> (Ty, Vec<Adjustment>) {
-        let mut ty = ty;
+        let mut ty = table.resolve_ty_shallow(&ty);
         let mut adjust = Vec::new();
         for _ in 0..self.autoderefs {
             match autoderef::autoderef_step(table, ty.clone()) {
@@ -624,52 +624,76 @@ pub(crate) fn iterate_method_candidates<T>(
     slot
 }
 
+/// Looks up the impl method that actually runs for the trait method `func`.
+///
+/// Returns `func` if it's not a method defined in a trait or the lookup failed.
 pub fn lookup_impl_method(
-    self_ty: &Ty,
     db: &dyn HirDatabase,
     env: Arc<TraitEnvironment>,
-    trait_: TraitId,
+    func: FunctionId,
+    fn_subst: Substitution,
+) -> FunctionId {
+    let trait_id = match func.lookup(db.upcast()).container {
+        ItemContainerId::TraitId(id) => id,
+        _ => return func,
+    };
+    let trait_params = db.generic_params(trait_id.into()).type_or_consts.len();
+    let fn_params = fn_subst.len(Interner) - trait_params;
+    let trait_ref = TraitRef {
+        trait_id: to_chalk_trait_id(trait_id),
+        substitution: Substitution::from_iter(Interner, fn_subst.iter(Interner).skip(fn_params)),
+    };
+
+    let name = &db.function_data(func).name;
+    lookup_impl_method_for_trait_ref(trait_ref, db, env, name).unwrap_or(func)
+}
+
+fn lookup_impl_method_for_trait_ref(
+    trait_ref: TraitRef,
+    db: &dyn HirDatabase,
+    env: Arc<TraitEnvironment>,
     name: &Name,
 ) -> Option<FunctionId> {
-    let self_ty_fp = TyFingerprint::for_trait_impl(self_ty)?;
-    let trait_impls = db.trait_impls_in_deps(env.krate);
-    let impls = trait_impls.for_trait_and_self_ty(trait_, self_ty_fp);
-    let mut table = InferenceTable::new(db, env.clone());
-    find_matching_impl(impls, &mut table, &self_ty).and_then(|data| {
-        data.items.iter().find_map(|it| match it {
-            AssocItemId::FunctionId(f) => (db.function_data(*f).name == *name).then(|| *f),
-            _ => None,
-        })
+    let self_ty = trait_ref.self_type_parameter(Interner);
+    let self_ty_fp = TyFingerprint::for_trait_impl(&self_ty)?;
+    let impls = db.trait_impls_in_deps(env.krate);
+    let impls = impls.for_trait_and_self_ty(trait_ref.hir_trait_id(), self_ty_fp);
+
+    let table = InferenceTable::new(db, env);
+
+    let impl_data = find_matching_impl(impls, table, trait_ref)?;
+    impl_data.items.iter().find_map(|it| match it {
+        AssocItemId::FunctionId(f) => (db.function_data(*f).name == *name).then(|| *f),
+        _ => None,
     })
 }
 
 fn find_matching_impl(
     mut impls: impl Iterator<Item = ImplId>,
-    table: &mut InferenceTable<'_>,
-    self_ty: &Ty,
+    mut table: InferenceTable<'_>,
+    actual_trait_ref: TraitRef,
 ) -> Option<Arc<ImplData>> {
     let db = table.db;
     loop {
         let impl_ = impls.next()?;
         let r = table.run_in_snapshot(|table| {
             let impl_data = db.impl_data(impl_);
-            let substs =
+            let impl_substs =
                 TyBuilder::subst_for_def(db, impl_, None).fill_with_inference_vars(table).build();
-            let impl_ty = db.impl_self_ty(impl_).substitute(Interner, &substs);
-
-            table
-                .unify(self_ty, &impl_ty)
-                .then(|| {
-                    let wh_goals =
-                        crate::chalk_db::convert_where_clauses(db, impl_.into(), &substs)
-                            .into_iter()
-                            .map(|b| b.cast(Interner));
+            let trait_ref = db
+                .impl_trait(impl_)
+                .expect("non-trait method in find_matching_impl")
+                .substitute(Interner, &impl_substs);
 
-                    let goal = crate::Goal::all(Interner, wh_goals);
+            if !table.unify(&trait_ref, &actual_trait_ref) {
+                return None;
+            }
 
-                    table.try_obligation(goal).map(|_| impl_data)
-                })
-                .flatten()
+            let wcs = crate::chalk_db::convert_where_clauses(db, impl_.into(), &impl_substs)
+                .into_iter()
+                .map(|b| b.cast(Interner));
+            let goal = crate::Goal::all(Interner, wcs);
+            table.try_obligation(goal).map(|_| impl_data)
         });
         if r.is_some() {
             break r;
@@ -1214,7 +1238,7 @@ fn is_valid_fn_candidate(
             let expected_receiver =
                 sig.map(|s| s.params()[0].clone()).substitute(Interner, &fn_subst);
 
-            check_that!(table.unify(&receiver_ty, &expected_receiver));
+            check_that!(table.unify(receiver_ty, &expected_receiver));
         }
 
         if let ItemContainerId::ImplId(impl_id) = container {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs
index d301595bc..7e3aecc2a 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs
@@ -123,6 +123,23 @@ fn test() {
 }
 
 #[test]
+fn if_else_adjust_for_branches_discard_type_var() {
+    check_no_mismatches(
+        r#"
+fn test() {
+    let f = || {
+        if true {
+            &""
+        } else {
+            ""
+        }
+    };
+}
+"#,
+    );
+}
+
+#[test]
 fn match_first_coerce() {
     check_no_mismatches(
         r#"
@@ -183,6 +200,22 @@ fn test() {
 }
 
 #[test]
+fn match_adjust_for_branches_discard_type_var() {
+    check_no_mismatches(
+        r#"
+fn test() {
+    let f = || {
+        match 0i32 {
+            0i32 => &"",
+            _ => "",
+        }
+    };
+}
+"#,
+    );
+}
+
+#[test]
 fn return_coerce_unknown() {
     check_types(
         r"
@@ -357,7 +390,7 @@ fn test() {
     let f: fn(u32) -> isize = foo;
                            // ^^^ adjustments: Pointer(ReifyFnPointer)
     let f: unsafe fn(u32) -> isize = foo;
-                                  // ^^^ adjustments: Pointer(ReifyFnPointer)
+                                  // ^^^ adjustments: Pointer(ReifyFnPointer), Pointer(UnsafeFnPointer)
 }",
     );
 }
@@ -388,7 +421,10 @@ fn coerce_closure_to_fn_ptr() {
     check_no_mismatches(
         r"
 fn test() {
-    let f: fn(u32) -> isize = |x| { 1 };
+    let f: fn(u32) -> u32 = |x| x;
+                         // ^^^^^ adjustments: Pointer(ClosureFnPointer(Safe))
+    let f: unsafe fn(u32) -> u32 = |x| x;
+                                // ^^^^^ adjustments: Pointer(ClosureFnPointer(Unsafe))
 }",
     );
 }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/display_source_code.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/display_source_code.rs
index 8a8ff08cf..425432479 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/display_source_code.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/display_source_code.rs
@@ -196,3 +196,34 @@ fn test(
 "#,
     );
 }
+
+#[test]
+fn projection_type_correct_arguments_order() {
+    check_types_source_code(
+        r#"
+trait Foo<T> {
+    type Assoc<U>;
+}
+fn f<T: Foo<i32>>(a: T::Assoc<usize>) {
+    a;
+  //^ <T as Foo<i32>>::Assoc<usize>
+}
+"#,
+    );
+}
+
+#[test]
+fn generic_associated_type_binding_in_impl_trait() {
+    check_types_source_code(
+        r#"
+//- minicore: sized
+trait Foo<T> {
+    type Assoc<U>;
+}
+fn f(a: impl Foo<i8, Assoc<i16> = i32>) {
+    a;
+  //^ impl Foo<i8, Assoc<i16> = i32>
+}
+        "#,
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs
index ac8edb841..5d76d185f 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs
@@ -164,16 +164,16 @@ fn infer_associated_method_with_modules() {
     check_infer(
         r#"
         mod a {
-            struct A;
+            pub struct A;
             impl A { pub fn thing() -> A { A {} }}
         }
 
         mod b {
-            struct B;
+            pub struct B;
             impl B { pub fn thing() -> u32 { 99 }}
 
-            mod c {
-                struct C;
+            pub mod c {
+                pub struct C;
                 impl C { pub fn thing() -> C { C {} }}
             }
         }
@@ -186,22 +186,22 @@ fn infer_associated_method_with_modules() {
         }
         "#,
         expect![[r#"
-            55..63 '{ A {} }': A
-            57..61 'A {}': A
-            125..131 '{ 99 }': u32
-            127..129 '99': u32
-            201..209 '{ C {} }': C
-            203..207 'C {}': C
-            240..324 '{     ...g(); }': ()
-            250..251 'x': A
-            254..265 'a::A::thing': fn thing() -> A
-            254..267 'a::A::thing()': A
-            277..278 'y': u32
-            281..292 'b::B::thing': fn thing() -> u32
-            281..294 'b::B::thing()': u32
-            304..305 'z': C
-            308..319 'c::C::thing': fn thing() -> C
-            308..321 'c::C::thing()': C
+            59..67 '{ A {} }': A
+            61..65 'A {}': A
+            133..139 '{ 99 }': u32
+            135..137 '99': u32
+            217..225 '{ C {} }': C
+            219..223 'C {}': C
+            256..340 '{     ...g(); }': ()
+            266..267 'x': A
+            270..281 'a::A::thing': fn thing() -> A
+            270..283 'a::A::thing()': A
+            293..294 'y': u32
+            297..308 'b::B::thing': fn thing() -> u32
+            297..310 'b::B::thing()': u32
+            320..321 'z': C
+            324..335 'c::C::thing': fn thing() -> C
+            324..337 'c::C::thing()': C
         "#]],
     );
 }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/regression.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/regression.rs
index a155adcec..4e4639745 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/regression.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/regression.rs
@@ -1707,3 +1707,19 @@ impl<T, const N: usize> Trait for [T; N] {
         "#,
     );
 }
+
+#[test]
+fn unsize_array_with_inference_variable() {
+    check_types(
+        r#"
+//- minicore: try, slice
+use core::ops::ControlFlow;
+fn foo() -> ControlFlow<(), [usize; 1]> { loop {} }
+fn bar() -> ControlFlow<(), ()> {
+    let a = foo()?.len();
+      //^ usize
+    ControlFlow::Continue(())
+}
+"#,
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/simple.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/simple.rs
index 080e2ac1b..d7431443b 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/simple.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/simple.rs
@@ -214,7 +214,7 @@ fn infer_paths() {
 fn a() -> u32 { 1 }
 
 mod b {
-    fn c() -> u32 { 1 }
+    pub fn c() -> u32 { 1 }
 }
 
 fn test() {
@@ -225,13 +225,13 @@ fn test() {
         expect![[r#"
             14..19 '{ 1 }': u32
             16..17 '1': u32
-            47..52 '{ 1 }': u32
-            49..50 '1': u32
-            66..90 '{     ...c(); }': ()
-            72..73 'a': fn a() -> u32
-            72..75 'a()': u32
-            81..85 'b::c': fn c() -> u32
-            81..87 'b::c()': u32
+            51..56 '{ 1 }': u32
+            53..54 '1': u32
+            70..94 '{     ...c(); }': ()
+            76..77 'a': fn a() -> u32
+            76..79 'a()': u32
+            85..89 'b::c': fn c() -> u32
+            85..91 'b::c()': u32
         "#]],
     );
 }
@@ -1856,7 +1856,7 @@ fn not_shadowing_module_by_primitive() {
     check_types(
         r#"
 //- /str.rs
-fn foo() -> u32 {0}
+pub fn foo() -> u32 {0}
 
 //- /main.rs
 mod str;
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs
index 555b6972f..3d7194b6f 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs
@@ -1706,7 +1706,7 @@ fn where_clause_trait_in_scope_for_method_resolution() {
     check_types(
         r#"
 mod foo {
-    trait Trait {
+    pub trait Trait {
         fn foo(&self) -> u32 { 0 }
     }
 }
@@ -1723,7 +1723,7 @@ fn super_trait_method_resolution() {
     check_infer(
         r#"
 mod foo {
-    trait SuperTrait {
+    pub trait SuperTrait {
         fn foo(&self) -> u32 {}
     }
 }
@@ -1735,15 +1735,15 @@ fn test<T: Trait1, U: Trait2>(x: T, y: U) {
     y.foo();
 }"#,
         expect![[r#"
-            49..53 'self': &Self
-            62..64 '{}': u32
-            181..182 'x': T
-            187..188 'y': U
-            193..222 '{     ...o(); }': ()
-            199..200 'x': T
-            199..206 'x.foo()': u32
-            212..213 'y': U
-            212..219 'y.foo()': u32
+            53..57 'self': &Self
+            66..68 '{}': u32
+            185..186 'x': T
+            191..192 'y': U
+            197..226 '{     ...o(); }': ()
+            203..204 'x': T
+            203..210 'x.foo()': u32
+            216..217 'y': U
+            216..223 'y.foo()': u32
         "#]],
     );
 }
@@ -1754,7 +1754,7 @@ fn super_trait_impl_trait_method_resolution() {
         r#"
 //- minicore: sized
 mod foo {
-    trait SuperTrait {
+    pub trait SuperTrait {
         fn foo(&self) -> u32 {}
     }
 }
@@ -1764,12 +1764,12 @@ fn test(x: &impl Trait1) {
     x.foo();
 }"#,
         expect![[r#"
-            49..53 'self': &Self
-            62..64 '{}': u32
-            115..116 'x': &impl Trait1
-            132..148 '{     ...o(); }': ()
-            138..139 'x': &impl Trait1
-            138..145 'x.foo()': u32
+            53..57 'self': &Self
+            66..68 '{}': u32
+            119..120 'x': &impl Trait1
+            136..152 '{     ...o(); }': ()
+            142..143 'x': &impl Trait1
+            142..149 'x.foo()': u32
         "#]],
     );
 }
@@ -3963,3 +3963,124 @@ fn g(t: &(dyn T + Send)) {
         "#,
     );
 }
+
+#[test]
+fn gats_in_path() {
+    check_types(
+        r#"
+//- minicore: deref
+use core::ops::Deref;
+trait PointerFamily {
+    type Pointer<T>: Deref<Target = T>;
+}
+
+fn f<P: PointerFamily>(p: P::Pointer<i32>) {
+    let a = *p;
+      //^ i32
+}
+fn g<P: PointerFamily>(p: <P as PointerFamily>::Pointer<i32>) {
+    let a = *p;
+      //^ i32
+}
+        "#,
+    );
+}
+
+#[test]
+fn gats_with_impl_trait() {
+    // FIXME: the last function (`fn i()`) is not valid Rust as of this writing because you cannot
+    // specify the same associated type multiple times even if their arguments are different (c.f.
+    // `fn h()`, which is valid). Reconsider how to treat these invalid types.
+    check_types(
+        r#"
+//- minicore: deref
+use core::ops::Deref;
+
+trait Trait {
+    type Assoc<T>: Deref<Target = T>;
+    fn get<U>(&self) -> Self::Assoc<U>;
+}
+
+fn f<T>(v: impl Trait) {
+    let a = v.get::<i32>().deref();
+      //^ &i32
+    let a = v.get::<T>().deref();
+      //^ &T
+}
+fn g<'a, T: 'a>(v: impl Trait<Assoc<T> = &'a T>) {
+    let a = v.get::<T>();
+      //^ &T
+    let a = v.get::<()>();
+      //^ Trait::Assoc<(), impl Trait<Assoc<T> = &T>>
+}
+fn h<'a>(v: impl Trait<Assoc<i32> = &'a i32> + Trait<Assoc<i64> = &'a i64>) {
+    let a = v.get::<i32>();
+      //^ &i32
+    let a = v.get::<i64>();
+      //^ &i64
+}
+fn i<'a>(v: impl Trait<Assoc<i32> = &'a i32, Assoc<i64> = &'a i64>) {
+    let a = v.get::<i32>();
+      //^ &i32
+    let a = v.get::<i64>();
+      //^ &i64
+}
+    "#,
+    );
+}
+
+#[test]
+fn gats_with_dyn() {
+    // This test is here to keep track of how we infer things despite traits with GATs being not
+    // object-safe currently.
+    // FIXME: reconsider how to treat these invalid types.
+    check_infer_with_mismatches(
+        r#"
+//- minicore: deref
+use core::ops::Deref;
+
+trait Trait {
+    type Assoc<T>: Deref<Target = T>;
+    fn get<U>(&self) -> Self::Assoc<U>;
+}
+
+fn f<'a>(v: &dyn Trait<Assoc<i32> = &'a i32>) {
+    v.get::<i32>().deref();
+}
+    "#,
+        expect![[r#"
+            90..94 'self': &Self
+            127..128 'v': &(dyn Trait<Assoc<i32> = &i32>)
+            164..195 '{     ...f(); }': ()
+            170..171 'v': &(dyn Trait<Assoc<i32> = &i32>)
+            170..184 'v.get::<i32>()': &i32
+            170..192 'v.get:...eref()': &i32
+        "#]],
+    );
+}
+
+#[test]
+fn gats_in_associated_type_binding() {
+    check_types(
+        r#"
+trait Trait {
+    type Assoc<T>;
+    fn get<U>(&self) -> Self::Assoc<U>;
+}
+
+fn f<T>(t: T)
+where
+    T: Trait<Assoc<i32> = u32>,
+    T: Trait<Assoc<isize> = usize>,
+{
+    let a = t.get::<i32>();
+      //^ u32
+    let a = t.get::<isize>();
+      //^ usize
+    let a = t.get::<()>();
+      //^ Trait::Assoc<(), T>
+}
+
+    "#,
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tls.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tls.rs
index 547850b02..92711a24f 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tls.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tls.rs
@@ -5,7 +5,7 @@ use itertools::Itertools;
 
 use crate::{
     chalk_db, db::HirDatabase, from_assoc_type_id, from_chalk_trait_id, mapping::from_chalk,
-    CallableDefId, Interner,
+    CallableDefId, Interner, ProjectionTyExt,
 };
 use hir_def::{AdtId, ItemContainerId, Lookup, TypeAliasId};
 
@@ -63,17 +63,31 @@ impl DebugContext<'_> {
             ItemContainerId::TraitId(t) => t,
             _ => panic!("associated type not in trait"),
         };
-        let trait_data = self.0.trait_data(trait_);
-        let params = projection_ty.substitution.as_slice(Interner);
-        write!(fmt, "<{:?} as {}", &params[0], trait_data.name,)?;
-        if params.len() > 1 {
+        let trait_name = &self.0.trait_data(trait_).name;
+        let trait_ref = projection_ty.trait_ref(self.0);
+        let trait_params = trait_ref.substitution.as_slice(Interner);
+        let self_ty = trait_ref.self_type_parameter(Interner);
+        write!(fmt, "<{:?} as {}", self_ty, trait_name)?;
+        if trait_params.len() > 1 {
+            write!(
+                fmt,
+                "<{}>",
+                trait_params[1..].iter().format_with(", ", |x, f| f(&format_args!("{:?}", x))),
+            )?;
+        }
+        write!(fmt, ">::{}", type_alias_data.name)?;
+
+        let proj_params_count = projection_ty.substitution.len(Interner) - trait_params.len();
+        let proj_params = &projection_ty.substitution.as_slice(Interner)[..proj_params_count];
+        if !proj_params.is_empty() {
             write!(
                 fmt,
                 "<{}>",
-                &params[1..].iter().format_with(", ", |x, f| f(&format_args!("{:?}", x))),
+                proj_params.iter().format_with(", ", |x, f| f(&format_args!("{:?}", x))),
             )?;
         }
-        write!(fmt, ">::{}", type_alias_data.name)
+
+        Ok(())
     }
 
     pub(crate) fn debug_fn_def_id(
diff --git a/src/tools/rust-analyzer/crates/hir/Cargo.toml b/src/tools/rust-analyzer/crates/hir/Cargo.toml
index e1418de3c..f780e3f53 100644
--- a/src/tools/rust-analyzer/crates/hir/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/hir/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/hir/src/lib.rs b/src/tools/rust-analyzer/crates/hir/src/lib.rs
index f5324208c..cbbcaebb4 100644
--- a/src/tools/rust-analyzer/crates/hir/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/lib.rs
@@ -117,7 +117,7 @@ pub use {
         name::{known, Name},
         ExpandResult, HirFileId, InFile, MacroFile, Origin,
     },
-    hir_ty::display::HirDisplay,
+    hir_ty::{display::HirDisplay, PointerCast, Safety},
 };
 
 // These are negative re-exports: pub using these names is forbidden, they
@@ -2995,7 +2995,16 @@ impl Type {
         let callee = match self.ty.kind(Interner) {
             TyKind::Closure(id, _) => Callee::Closure(*id),
             TyKind::Function(_) => Callee::FnPtr,
-            _ => Callee::Def(self.ty.callable_def(db)?),
+            TyKind::FnDef(..) => Callee::Def(self.ty.callable_def(db)?),
+            _ => {
+                let sig = hir_ty::callable_sig_from_fnonce(&self.ty, self.env.clone(), db)?;
+                return Some(Callable {
+                    ty: self.clone(),
+                    sig,
+                    callee: Callee::Other,
+                    is_bound_method: false,
+                });
+            }
         };
 
         let sig = self.ty.callable_sig(db)?;
@@ -3464,6 +3473,7 @@ enum Callee {
     Def(CallableDefId),
     Closure(ClosureId),
     FnPtr,
+    Other,
 }
 
 pub enum CallableKind {
@@ -3472,6 +3482,8 @@ pub enum CallableKind {
     TupleEnumVariant(Variant),
     Closure,
     FnPtr,
+    /// Some other type that implements `FnOnce`.
+    Other,
 }
 
 impl Callable {
@@ -3483,6 +3495,7 @@ impl Callable {
             Def(CallableDefId::EnumVariantId(it)) => CallableKind::TupleEnumVariant(it.into()),
             Closure(_) => CallableKind::Closure,
             FnPtr => CallableKind::FnPtr,
+            Other => CallableKind::Other,
         }
     }
     pub fn receiver_param(&self, db: &dyn HirDatabase) -> Option<ast::SelfParam> {
@@ -3637,6 +3650,28 @@ impl From<ItemInNs> for ScopeDef {
     }
 }
 
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum Adjust {
+    /// Go from ! to any type.
+    NeverToAny,
+    /// Dereference once, producing a place.
+    Deref(Option<OverloadedDeref>),
+    /// Take the address and produce either a `&` or `*` pointer.
+    Borrow(AutoBorrow),
+    Pointer(PointerCast),
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum AutoBorrow {
+    /// Converts from T to &T.
+    Ref(Mutability),
+    /// Converts from T to *T.
+    RawPtr(Mutability),
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub struct OverloadedDeref(pub Mutability);
+
 pub trait HasVisibility {
     fn visibility(&self, db: &dyn HirDatabase) -> Visibility;
     fn is_visible_from(&self, db: &dyn HirDatabase, module: Module) -> bool {
diff --git a/src/tools/rust-analyzer/crates/hir/src/semantics.rs b/src/tools/rust-analyzer/crates/hir/src/semantics.rs
index 119ec3210..2e1f88ba0 100644
--- a/src/tools/rust-analyzer/crates/hir/src/semantics.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/semantics.rs
@@ -29,9 +29,10 @@ use crate::{
     db::HirDatabase,
     semantics::source_to_def::{ChildContainer, SourceToDefCache, SourceToDefCtx},
     source_analyzer::{resolve_hir_path, SourceAnalyzer},
-    Access, BindingMode, BuiltinAttr, Callable, ConstParam, Crate, DeriveHelper, Field, Function,
-    HasSource, HirFileId, Impl, InFile, Label, LifetimeParam, Local, Macro, Module, ModuleDef,
-    Name, Path, ScopeDef, ToolModule, Trait, Type, TypeAlias, TypeParam, VariantDef,
+    Access, Adjust, AutoBorrow, BindingMode, BuiltinAttr, Callable, ConstParam, Crate,
+    DeriveHelper, Field, Function, HasSource, HirFileId, Impl, InFile, Label, LifetimeParam, Local,
+    Macro, Module, ModuleDef, Name, OverloadedDeref, Path, ScopeDef, ToolModule, Trait, Type,
+    TypeAlias, TypeParam, VariantDef,
 };
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -333,9 +334,8 @@ impl<'db, DB: HirDatabase> Semantics<'db, DB> {
         self.imp.resolve_trait(trait_)
     }
 
-    // FIXME: Figure out a nice interface to inspect adjustments
-    pub fn is_implicit_reborrow(&self, expr: &ast::Expr) -> Option<Mutability> {
-        self.imp.is_implicit_reborrow(expr)
+    pub fn expr_adjustments(&self, expr: &ast::Expr) -> Option<Vec<Adjust>> {
+        self.imp.expr_adjustments(expr)
     }
 
     pub fn type_of_expr(&self, expr: &ast::Expr) -> Option<TypeInfo> {
@@ -1067,8 +1067,29 @@ impl<'db> SemanticsImpl<'db> {
         }
     }
 
-    fn is_implicit_reborrow(&self, expr: &ast::Expr) -> Option<Mutability> {
-        self.analyze(expr.syntax())?.is_implicit_reborrow(self.db, expr)
+    fn expr_adjustments(&self, expr: &ast::Expr) -> Option<Vec<Adjust>> {
+        let mutability = |m| match m {
+            hir_ty::Mutability::Not => Mutability::Shared,
+            hir_ty::Mutability::Mut => Mutability::Mut,
+        };
+        self.analyze(expr.syntax())?.expr_adjustments(self.db, expr).map(|it| {
+            it.iter()
+                .map(|adjust| match adjust.kind {
+                    hir_ty::Adjust::NeverToAny => Adjust::NeverToAny,
+                    hir_ty::Adjust::Deref(Some(hir_ty::OverloadedDeref(m))) => {
+                        Adjust::Deref(Some(OverloadedDeref(mutability(m))))
+                    }
+                    hir_ty::Adjust::Deref(None) => Adjust::Deref(None),
+                    hir_ty::Adjust::Borrow(hir_ty::AutoBorrow::RawPtr(m)) => {
+                        Adjust::Borrow(AutoBorrow::RawPtr(mutability(m)))
+                    }
+                    hir_ty::Adjust::Borrow(hir_ty::AutoBorrow::Ref(m)) => {
+                        Adjust::Borrow(AutoBorrow::Ref(mutability(m)))
+                    }
+                    hir_ty::Adjust::Pointer(pc) => Adjust::Pointer(pc),
+                })
+                .collect()
+        })
     }
 
     fn type_of_expr(&self, expr: &ast::Expr) -> Option<TypeInfo> {
diff --git a/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs b/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
index 07bae2b38..91ea1c24d 100644
--- a/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
@@ -38,8 +38,7 @@ use hir_ty::{
         UnsafeExpr,
     },
     method_resolution::{self, lang_names_for_bin_op},
-    Adjust, Adjustment, AutoBorrow, InferenceResult, Interner, Substitution, Ty, TyExt, TyKind,
-    TyLoweringContext,
+    Adjustment, InferenceResult, Interner, Substitution, Ty, TyExt, TyKind, TyLoweringContext,
 };
 use itertools::Itertools;
 use smallvec::SmallVec;
@@ -156,21 +155,14 @@ impl SourceAnalyzer {
         Some(res)
     }
 
-    pub(crate) fn is_implicit_reborrow(
+    pub(crate) fn expr_adjustments(
         &self,
         db: &dyn HirDatabase,
         expr: &ast::Expr,
-    ) -> Option<Mutability> {
+    ) -> Option<&[Adjustment]> {
         let expr_id = self.expr_id(db, expr)?;
         let infer = self.infer.as_ref()?;
-        let adjustments = infer.expr_adjustments.get(&expr_id)?;
-        adjustments.windows(2).find_map(|slice| match slice {
-            &[Adjustment {kind: Adjust::Deref(None), ..}, Adjustment {kind: Adjust::Borrow(AutoBorrow::Ref(m)), ..}] => Some(match m {
-                hir_ty::Mutability::Mut => Mutability::Mut,
-                hir_ty::Mutability::Not => Mutability::Shared,
-            }),
-            _ => None,
-        })
+        infer.expr_adjustments.get(&expr_id).map(|v| &**v)
     }
 
     pub(crate) fn type_of_expr(
@@ -270,7 +262,7 @@ impl SourceAnalyzer {
         let expr_id = self.expr_id(db, &call.clone().into())?;
         let (f_in_trait, substs) = self.infer.as_ref()?.method_resolution(expr_id)?;
 
-        Some(self.resolve_impl_method_or_trait_def(db, f_in_trait, &substs))
+        Some(self.resolve_impl_method_or_trait_def(db, f_in_trait, substs))
     }
 
     pub(crate) fn resolve_await_to_poll(
@@ -311,7 +303,7 @@ impl SourceAnalyzer {
         // HACK: subst for `poll()` coincides with that for `Future` because `poll()` itself
         // doesn't have any generic parameters, so we skip building another subst for `poll()`.
         let substs = hir_ty::TyBuilder::subst_for_def(db, future_trait, None).push(ty).build();
-        Some(self.resolve_impl_method_or_trait_def(db, poll_fn, &substs))
+        Some(self.resolve_impl_method_or_trait_def(db, poll_fn, substs))
     }
 
     pub(crate) fn resolve_prefix_expr(
@@ -331,7 +323,7 @@ impl SourceAnalyzer {
         // don't have any generic parameters, so we skip building another subst for the methods.
         let substs = hir_ty::TyBuilder::subst_for_def(db, op_trait, None).push(ty.clone()).build();
 
-        Some(self.resolve_impl_method_or_trait_def(db, op_fn, &substs))
+        Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
     }
 
     pub(crate) fn resolve_index_expr(
@@ -351,7 +343,7 @@ impl SourceAnalyzer {
             .push(base_ty.clone())
             .push(index_ty.clone())
             .build();
-        Some(self.resolve_impl_method_or_trait_def(db, op_fn, &substs))
+        Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
     }
 
     pub(crate) fn resolve_bin_expr(
@@ -372,7 +364,7 @@ impl SourceAnalyzer {
             .push(rhs.clone())
             .build();
 
-        Some(self.resolve_impl_method_or_trait_def(db, op_fn, &substs))
+        Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
     }
 
     pub(crate) fn resolve_try_expr(
@@ -392,7 +384,7 @@ impl SourceAnalyzer {
         // doesn't have any generic parameters, so we skip building another subst for `branch()`.
         let substs = hir_ty::TyBuilder::subst_for_def(db, op_trait, None).push(ty.clone()).build();
 
-        Some(self.resolve_impl_method_or_trait_def(db, op_fn, &substs))
+        Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
     }
 
     pub(crate) fn resolve_field(
@@ -487,9 +479,9 @@ impl SourceAnalyzer {
 
         let mut prefer_value_ns = false;
         let resolved = (|| {
+            let infer = self.infer.as_deref()?;
             if let Some(path_expr) = parent().and_then(ast::PathExpr::cast) {
                 let expr_id = self.expr_id(db, &path_expr.into())?;
-                let infer = self.infer.as_ref()?;
                 if let Some(assoc) = infer.assoc_resolutions_for_expr(expr_id) {
                     let assoc = match assoc {
                         AssocItemId::FunctionId(f_in_trait) => {
@@ -497,9 +489,12 @@ impl SourceAnalyzer {
                                 None => assoc,
                                 Some(func_ty) => {
                                     if let TyKind::FnDef(_fn_def, subs) = func_ty.kind(Interner) {
-                                        self.resolve_impl_method(db, f_in_trait, subs)
-                                            .map(AssocItemId::FunctionId)
-                                            .unwrap_or(assoc)
+                                        self.resolve_impl_method_or_trait_def(
+                                            db,
+                                            f_in_trait,
+                                            subs.clone(),
+                                        )
+                                        .into()
                                     } else {
                                         assoc
                                     }
@@ -520,18 +515,18 @@ impl SourceAnalyzer {
                 prefer_value_ns = true;
             } else if let Some(path_pat) = parent().and_then(ast::PathPat::cast) {
                 let pat_id = self.pat_id(&path_pat.into())?;
-                if let Some(assoc) = self.infer.as_ref()?.assoc_resolutions_for_pat(pat_id) {
+                if let Some(assoc) = infer.assoc_resolutions_for_pat(pat_id) {
                     return Some(PathResolution::Def(AssocItem::from(assoc).into()));
                 }
                 if let Some(VariantId::EnumVariantId(variant)) =
-                    self.infer.as_ref()?.variant_resolution_for_pat(pat_id)
+                    infer.variant_resolution_for_pat(pat_id)
                 {
                     return Some(PathResolution::Def(ModuleDef::Variant(variant.into())));
                 }
             } else if let Some(rec_lit) = parent().and_then(ast::RecordExpr::cast) {
                 let expr_id = self.expr_id(db, &rec_lit.into())?;
                 if let Some(VariantId::EnumVariantId(variant)) =
-                    self.infer.as_ref()?.variant_resolution_for_expr(expr_id)
+                    infer.variant_resolution_for_expr(expr_id)
                 {
                     return Some(PathResolution::Def(ModuleDef::Variant(variant.into())));
                 }
@@ -541,8 +536,7 @@ impl SourceAnalyzer {
                     || parent().and_then(ast::TupleStructPat::cast).map(ast::Pat::from);
                 if let Some(pat) = record_pat.or_else(tuple_struct_pat) {
                     let pat_id = self.pat_id(&pat)?;
-                    let variant_res_for_pat =
-                        self.infer.as_ref()?.variant_resolution_for_pat(pat_id);
+                    let variant_res_for_pat = infer.variant_resolution_for_pat(pat_id);
                     if let Some(VariantId::EnumVariantId(variant)) = variant_res_for_pat {
                         return Some(PathResolution::Def(ModuleDef::Variant(variant.into())));
                     }
@@ -780,37 +774,22 @@ impl SourceAnalyzer {
         false
     }
 
-    fn resolve_impl_method(
+    fn resolve_impl_method_or_trait_def(
         &self,
         db: &dyn HirDatabase,
         func: FunctionId,
-        substs: &Substitution,
-    ) -> Option<FunctionId> {
-        let impled_trait = match func.lookup(db.upcast()).container {
-            ItemContainerId::TraitId(trait_id) => trait_id,
-            _ => return None,
-        };
-        if substs.is_empty(Interner) {
-            return None;
-        }
-        let self_ty = substs.at(Interner, 0).ty(Interner)?;
+        substs: Substitution,
+    ) -> FunctionId {
         let krate = self.resolver.krate();
-        let trait_env = self.resolver.body_owner()?.as_generic_def_id().map_or_else(
+        let owner = match self.resolver.body_owner() {
+            Some(it) => it,
+            None => return func,
+        };
+        let env = owner.as_generic_def_id().map_or_else(
             || Arc::new(hir_ty::TraitEnvironment::empty(krate)),
             |d| db.trait_environment(d),
         );
-
-        let fun_data = db.function_data(func);
-        method_resolution::lookup_impl_method(self_ty, db, trait_env, impled_trait, &fun_data.name)
-    }
-
-    fn resolve_impl_method_or_trait_def(
-        &self,
-        db: &dyn HirDatabase,
-        func: FunctionId,
-        substs: &Substitution,
-    ) -> FunctionId {
-        self.resolve_impl_method(db, func, substs).unwrap_or(func)
+        method_resolution::lookup_impl_method(db, env, func, substs)
     }
 
     fn lang_trait_fn(
diff --git a/src/tools/rust-analyzer/crates/ide-assists/Cargo.toml b/src/tools/rust-analyzer/crates/ide-assists/Cargo.toml
index 57a41f3d9..e781c0a01 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/ide-assists/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/assist_config.rs b/src/tools/rust-analyzer/crates/ide-assists/src/assist_config.rs
index 60d1588a4..b273ebc85 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/assist_config.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/assist_config.rs
@@ -14,4 +14,5 @@ pub struct AssistConfig {
     pub allowed: Option<Vec<AssistKind>>,
     pub insert_use: InsertUseConfig,
     pub prefer_no_std: bool,
+    pub assist_emit_must_use: bool,
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_explicit_type.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_explicit_type.rs
index bfa9759ec..b5f99726f 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_explicit_type.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_explicit_type.rs
@@ -69,14 +69,14 @@ pub(crate) fn add_explicit_type(acc: &mut Assists, ctx: &AssistContext<'_>) -> O
     let inferred_type = ty.display_source_code(ctx.db(), module.into()).ok()?;
     acc.add(
         AssistId("add_explicit_type", AssistKind::RefactorRewrite),
-        format!("Insert explicit type `{}`", inferred_type),
+        format!("Insert explicit type `{inferred_type}`"),
         pat_range,
         |builder| match ascribed_ty {
             Some(ascribed_ty) => {
                 builder.replace(ascribed_ty.syntax().text_range(), inferred_type);
             }
             None => {
-                builder.insert(pat_range.end(), format!(": {}", inferred_type));
+                builder.insert(pat_range.end(), format!(": {inferred_type}"));
             }
         },
     )
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_impl_members.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_impl_members.rs
index 62cf5ab4f..2b3793659 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_impl_members.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_impl_members.rs
@@ -196,6 +196,7 @@ trait Foo {
     type Output;
 
     const CONST: usize = 42;
+    const CONST_2: i32;
 
     fn foo(&self);
     fn bar(&self);
@@ -213,6 +214,7 @@ trait Foo {
     type Output;
 
     const CONST: usize = 42;
+    const CONST_2: i32;
 
     fn foo(&self);
     fn bar(&self);
@@ -226,7 +228,7 @@ impl Foo for S {
 
     $0type Output;
 
-    const CONST: usize = 42;
+    const CONST_2: i32;
 
     fn foo(&self) {
         todo!()
@@ -379,14 +381,14 @@ impl Foo for S {
             r#"
 mod foo {
     pub struct Bar;
-    trait Foo { fn foo(&self, bar: Bar); }
+    pub trait Foo { fn foo(&self, bar: Bar); }
 }
 struct S;
 impl foo::Foo for S { $0 }"#,
             r#"
 mod foo {
     pub struct Bar;
-    trait Foo { fn foo(&self, bar: Bar); }
+    pub trait Foo { fn foo(&self, bar: Bar); }
 }
 struct S;
 impl foo::Foo for S {
@@ -439,14 +441,14 @@ impl bar::Foo for S {
             r#"
 mod foo {
     pub struct Bar<T>;
-    trait Foo { fn foo(&self, bar: Bar<u32>); }
+    pub trait Foo { fn foo(&self, bar: Bar<u32>); }
 }
 struct S;
 impl foo::Foo for S { $0 }"#,
             r#"
 mod foo {
     pub struct Bar<T>;
-    trait Foo { fn foo(&self, bar: Bar<u32>); }
+    pub trait Foo { fn foo(&self, bar: Bar<u32>); }
 }
 struct S;
 impl foo::Foo for S {
@@ -464,14 +466,14 @@ impl foo::Foo for S {
             r#"
 mod foo {
     pub struct Bar<T>;
-    trait Foo<T> { fn foo(&self, bar: Bar<T>); }
+    pub trait Foo<T> { fn foo(&self, bar: Bar<T>); }
 }
 struct S;
 impl foo::Foo<u32> for S { $0 }"#,
             r#"
 mod foo {
     pub struct Bar<T>;
-    trait Foo<T> { fn foo(&self, bar: Bar<T>); }
+    pub trait Foo<T> { fn foo(&self, bar: Bar<T>); }
 }
 struct S;
 impl foo::Foo<u32> for S {
@@ -489,7 +491,7 @@ impl foo::Foo<u32> for S {
             add_missing_impl_members,
             r#"
 mod foo {
-    trait Foo<T> { fn foo(&self, bar: T); }
+    pub trait Foo<T> { fn foo(&self, bar: T); }
     pub struct Param;
 }
 struct Param;
@@ -497,7 +499,7 @@ struct S;
 impl foo::Foo<Param> for S { $0 }"#,
             r#"
 mod foo {
-    trait Foo<T> { fn foo(&self, bar: T); }
+    pub trait Foo<T> { fn foo(&self, bar: T); }
     pub struct Param;
 }
 struct Param;
@@ -518,7 +520,7 @@ impl foo::Foo<Param> for S {
 mod foo {
     pub struct Bar<T>;
     impl Bar<T> { type Assoc = u32; }
-    trait Foo { fn foo(&self, bar: Bar<u32>::Assoc); }
+    pub trait Foo { fn foo(&self, bar: Bar<u32>::Assoc); }
 }
 struct S;
 impl foo::Foo for S { $0 }"#,
@@ -526,7 +528,7 @@ impl foo::Foo for S { $0 }"#,
 mod foo {
     pub struct Bar<T>;
     impl Bar<T> { type Assoc = u32; }
-    trait Foo { fn foo(&self, bar: Bar<u32>::Assoc); }
+    pub trait Foo { fn foo(&self, bar: Bar<u32>::Assoc); }
 }
 struct S;
 impl foo::Foo for S {
@@ -545,7 +547,7 @@ impl foo::Foo for S {
 mod foo {
     pub struct Bar<T>;
     pub struct Baz;
-    trait Foo { fn foo(&self, bar: Bar<Baz>); }
+    pub trait Foo { fn foo(&self, bar: Bar<Baz>); }
 }
 struct S;
 impl foo::Foo for S { $0 }"#,
@@ -553,7 +555,7 @@ impl foo::Foo for S { $0 }"#,
 mod foo {
     pub struct Bar<T>;
     pub struct Baz;
-    trait Foo { fn foo(&self, bar: Bar<Baz>); }
+    pub trait Foo { fn foo(&self, bar: Bar<Baz>); }
 }
 struct S;
 impl foo::Foo for S {
@@ -571,14 +573,14 @@ impl foo::Foo for S {
             r#"
 mod foo {
     pub trait Fn<Args> { type Output; }
-    trait Foo { fn foo(&self, bar: dyn Fn(u32) -> i32); }
+    pub trait Foo { fn foo(&self, bar: dyn Fn(u32) -> i32); }
 }
 struct S;
 impl foo::Foo for S { $0 }"#,
             r#"
 mod foo {
     pub trait Fn<Args> { type Output; }
-    trait Foo { fn foo(&self, bar: dyn Fn(u32) -> i32); }
+    pub trait Foo { fn foo(&self, bar: dyn Fn(u32) -> i32); }
 }
 struct S;
 impl foo::Foo for S {
@@ -658,6 +660,7 @@ trait Foo {
     type Output;
 
     const CONST: usize = 42;
+    const CONST_2: i32;
 
     fn valid(some: u32) -> bool { false }
     fn foo(some: u32) -> bool;
@@ -669,13 +672,16 @@ trait Foo {
     type Output;
 
     const CONST: usize = 42;
+    const CONST_2: i32;
 
     fn valid(some: u32) -> bool { false }
     fn foo(some: u32) -> bool;
 }
 struct S;
 impl Foo for S {
-    $0fn valid(some: u32) -> bool { false }
+    $0const CONST: usize = 42;
+
+    fn valid(some: u32) -> bool { false }
 }"#,
         )
     }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_return_type.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_return_type.rs
index f858d7a15..89040a856 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_return_type.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_return_type.rs
@@ -35,16 +35,16 @@ pub(crate) fn add_return_type(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opt
             match builder_edit_pos {
                 InsertOrReplace::Insert(insert_pos, needs_whitespace) => {
                     let preceeding_whitespace = if needs_whitespace { " " } else { "" };
-                    builder.insert(insert_pos, &format!("{}-> {} ", preceeding_whitespace, ty))
+                    builder.insert(insert_pos, &format!("{preceeding_whitespace}-> {ty} "))
                 }
                 InsertOrReplace::Replace(text_range) => {
-                    builder.replace(text_range, &format!("-> {}", ty))
+                    builder.replace(text_range, &format!("-> {ty}"))
                 }
             }
             if let FnType::Closure { wrap_expr: true } = fn_type {
                 cov_mark::hit!(wrap_closure_non_block_expr);
                 // `|x| x` becomes `|x| -> T x` which is invalid, so wrap it in a block
-                builder.replace(tail_expr.syntax().text_range(), &format!("{{{}}}", tail_expr));
+                builder.replace(tail_expr.syntax().text_range(), &format!("{{{tail_expr}}}"));
             }
         },
     )
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_turbo_fish.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_turbo_fish.rs
index c0bf238db..acf82e4b2 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_turbo_fish.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_turbo_fish.rs
@@ -93,12 +93,13 @@ pub(crate) fn add_turbo_fish(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
             builder.trigger_signature_help();
             match ctx.config.snippet_cap {
                 Some(cap) => {
-                    let snip = format!("::<{}>", get_snippet_fish_head(number_of_arguments));
+                    let fish_head = get_snippet_fish_head(number_of_arguments);
+                    let snip = format!("::<{fish_head}>");
                     builder.insert_snippet(cap, ident.text_range().end(), snip)
                 }
                 None => {
                     let fish_head = std::iter::repeat("_").take(number_of_arguments).format(", ");
-                    let snip = format!("::<{}>", fish_head);
+                    let snip = format!("::<{fish_head}>");
                     builder.insert(ident.text_range().end(), snip);
                 }
             }
@@ -109,7 +110,7 @@ pub(crate) fn add_turbo_fish(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
 /// This will create a snippet string with tabstops marked
 fn get_snippet_fish_head(number_of_arguments: usize) -> String {
     let mut fish_head = (1..number_of_arguments)
-        .format_with("", |i, f| f(&format_args!("${{{}:_}}, ", i)))
+        .format_with("", |i, f| f(&format_args!("${{{i}:_}}, ")))
         .to_string();
 
     // tabstop 0 is a special case and always the last one
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/apply_demorgan.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/apply_demorgan.rs
index 2853d1d1b..57cfa17cc 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/apply_demorgan.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/apply_demorgan.rs
@@ -123,20 +123,20 @@ pub(crate) fn apply_demorgan(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
                     let lhs_range = lhs.syntax().text_range();
                     let not_lhs = invert_boolean_expression(lhs);
 
-                    edit.replace(lhs_range, format!("!({}", not_lhs.syntax().text()));
+                    edit.replace(lhs_range, format!("!({not_lhs}"));
                 }
 
                 if let Some(rhs) = terms.pop_back() {
                     let rhs_range = rhs.syntax().text_range();
                     let not_rhs = invert_boolean_expression(rhs);
 
-                    edit.replace(rhs_range, format!("{})", not_rhs.syntax().text()));
+                    edit.replace(rhs_range, format!("{not_rhs})"));
                 }
 
                 for term in terms {
                     let term_range = term.syntax().text_range();
                     let not_term = invert_boolean_expression(term);
-                    edit.replace(term_range, not_term.syntax().text());
+                    edit.replace(term_range, not_term.to_string());
                 }
             }
         },
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/auto_import.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/auto_import.rs
index 678dc877d..a689270bc 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/auto_import.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/auto_import.rs
@@ -127,10 +127,12 @@ pub(crate) fn auto_import(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<
         .sort_by_key(|import| Reverse(relevance_score(ctx, import, current_module.as_ref())));
 
     for import in proposed_imports {
+        let import_path = import.import_path;
+
         acc.add_group(
             &group_label,
             AssistId("auto_import", AssistKind::QuickFix),
-            format!("Import `{}`", import.import_path),
+            format!("Import `{import_path}`"),
             range,
             |builder| {
                 let scope = match scope.clone() {
@@ -138,7 +140,7 @@ pub(crate) fn auto_import(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<
                     ImportScope::Module(it) => ImportScope::Module(builder.make_mut(it)),
                     ImportScope::Block(it) => ImportScope::Block(builder.make_mut(it)),
                 };
-                insert_use(&scope, mod_path_to_ast(&import.import_path), &ctx.config.insert_use);
+                insert_use(&scope, mod_path_to_ast(&import_path), &ctx.config.insert_use);
             },
         );
     }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_comment_block.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_comment_block.rs
index f171dd81a..312cb65ab 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_comment_block.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_comment_block.rs
@@ -54,16 +54,17 @@ fn block_to_line(acc: &mut Assists, comment: ast::Comment) -> Option<()> {
 
             let indent_spaces = indentation.to_string();
             let output = lines
-                .map(|l| l.trim_start_matches(&indent_spaces))
-                .map(|l| {
+                .map(|line| {
+                    let line = line.trim_start_matches(&indent_spaces);
+
                     // Don't introduce trailing whitespace
-                    if l.is_empty() {
+                    if line.is_empty() {
                         line_prefix.to_string()
                     } else {
-                        format!("{} {}", line_prefix, l.trim_start_matches(&indent_spaces))
+                        format!("{line_prefix} {line}")
                     }
                 })
-                .join(&format!("\n{}", indent_spaces));
+                .join(&format!("\n{indent_spaces}"));
 
             edit.replace(target, output)
         },
@@ -96,7 +97,7 @@ fn line_to_block(acc: &mut Assists, comment: ast::Comment) -> Option<()> {
             let block_prefix =
                 CommentKind { shape: CommentShape::Block, ..comment.kind() }.prefix();
 
-            let output = format!("{}\n{}\n{}*/", block_prefix, block_comment_body, indentation);
+            let output = format!("{block_prefix}\n{block_comment_body}\n{indentation}*/");
 
             edit.replace(target, output)
         },
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_integer_literal.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_integer_literal.rs
index 9060696cd..ff2195f7e 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_integer_literal.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_integer_literal.rs
@@ -32,19 +32,19 @@ pub(crate) fn convert_integer_literal(acc: &mut Assists, ctx: &AssistContext<'_>
         }
 
         let mut converted = match target_radix {
-            Radix::Binary => format!("0b{:b}", value),
-            Radix::Octal => format!("0o{:o}", value),
+            Radix::Binary => format!("0b{value:b}"),
+            Radix::Octal => format!("0o{value:o}"),
             Radix::Decimal => value.to_string(),
-            Radix::Hexadecimal => format!("0x{:X}", value),
+            Radix::Hexadecimal => format!("0x{value:X}"),
         };
 
-        let label = format!("Convert {} to {}{}", literal, converted, suffix.unwrap_or_default());
-
         // Appends the type suffix back into the new literal if it exists.
         if let Some(suffix) = suffix {
             converted.push_str(suffix);
         }
 
+        let label = format!("Convert {literal} to {converted}");
+
         acc.add_group(
             &group_id,
             AssistId("convert_integer_literal", AssistKind::RefactorInline),
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_into_to_from.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_into_to_from.rs
index 95d11abe8..872b52c98 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_into_to_from.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_into_to_from.rs
@@ -86,9 +86,9 @@ pub(crate) fn convert_into_to_from(acc: &mut Assists, ctx: &AssistContext<'_>) -
         impl_.syntax().text_range(),
         |builder| {
             builder.replace(src_type.syntax().text_range(), dest_type.to_string());
-            builder.replace(ast_trait.syntax().text_range(), format!("From<{}>", src_type));
+            builder.replace(ast_trait.syntax().text_range(), format!("From<{src_type}>"));
             builder.replace(into_fn_return.syntax().text_range(), "-> Self");
-            builder.replace(into_fn_params.syntax().text_range(), format!("(val: {})", src_type));
+            builder.replace(into_fn_params.syntax().text_range(), format!("(val: {src_type})"));
             builder.replace(into_fn_name.syntax().text_range(), "from");
 
             for s in selfs {
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_iter_for_each_to_for.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_iter_for_each_to_for.rs
index 2cf370c09..80eecf4a0 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_iter_for_each_to_for.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_iter_for_each_to_for.rs
@@ -119,19 +119,19 @@ pub(crate) fn convert_for_loop_with_for_each(
             {
                 // We have either "for x in &col" and col implements a method called iter
                 //             or "for x in &mut col" and col implements a method called iter_mut
-                format_to!(buf, "{}.{}()", expr_behind_ref, method);
+                format_to!(buf, "{expr_behind_ref}.{method}()");
             } else if let ast::Expr::RangeExpr(..) = iterable {
                 // range expressions need to be parenthesized for the syntax to be correct
-                format_to!(buf, "({})", iterable);
+                format_to!(buf, "({iterable})");
             } else if impls_core_iter(&ctx.sema, &iterable) {
-                format_to!(buf, "{}", iterable);
+                format_to!(buf, "{iterable}");
             } else if let ast::Expr::RefExpr(_) = iterable {
-                format_to!(buf, "({}).into_iter()", iterable);
+                format_to!(buf, "({iterable}).into_iter()");
             } else {
-                format_to!(buf, "{}.into_iter()", iterable);
+                format_to!(buf, "{iterable}.into_iter()");
             }
 
-            format_to!(buf, ".for_each(|{}| {});", pat, body);
+            format_to!(buf, ".for_each(|{pat}| {body});");
 
             builder.replace(for_loop.syntax().text_range(), buf)
         },
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_let_else_to_match.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_let_else_to_match.rs
index 00095de25..c82a3b530 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_let_else_to_match.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_let_else_to_match.rs
@@ -80,7 +80,7 @@ fn binders_to_str(binders: &[(Name, bool)], addmut: bool) -> String {
         .map(
             |(ident, ismut)| {
                 if *ismut && addmut {
-                    format!("mut {}", ident)
+                    format!("mut {ident}")
                 } else {
                     ident.to_string()
                 }
@@ -93,7 +93,7 @@ fn binders_to_str(binders: &[(Name, bool)], addmut: bool) -> String {
     } else if binders.len() == 1 {
         vars
     } else {
-        format!("({})", vars)
+        format!("({vars})")
     }
 }
 
@@ -153,7 +153,7 @@ pub(crate) fn convert_let_else_to_match(acc: &mut Assists, ctx: &AssistContext<'
 
             let only_expr = let_else_block.statements().next().is_none();
             let branch2 = match &let_else_block.tail_expr() {
-                Some(tail) if only_expr => format!("{},", tail.syntax().text()),
+                Some(tail) if only_expr => format!("{tail},"),
                 _ => let_else_block.syntax().text().to_string(),
             };
             let replace = if binders.is_empty() {
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_match_to_let_else.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_match_to_let_else.rs
new file mode 100644
index 000000000..5bf04a3ad
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_match_to_let_else.rs
@@ -0,0 +1,413 @@
+use ide_db::defs::{Definition, NameRefClass};
+use syntax::{
+    ast::{self, HasName},
+    ted, AstNode, SyntaxNode,
+};
+
+use crate::{
+    assist_context::{AssistContext, Assists},
+    AssistId, AssistKind,
+};
+
+// Assist: convert_match_to_let_else
+//
+// Converts let statement with match initializer to let-else statement.
+//
+// ```
+// # //- minicore: option
+// fn foo(opt: Option<()>) {
+//     let val = $0match opt {
+//         Some(it) => it,
+//         None => return,
+//     };
+// }
+// ```
+// ->
+// ```
+// fn foo(opt: Option<()>) {
+//     let Some(val) = opt else { return };
+// }
+// ```
+pub(crate) fn convert_match_to_let_else(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
+    let let_stmt: ast::LetStmt = ctx.find_node_at_offset()?;
+    let binding = find_binding(let_stmt.pat()?)?;
+
+    let initializer = match let_stmt.initializer() {
+        Some(ast::Expr::MatchExpr(it)) => it,
+        _ => return None,
+    };
+    let initializer_expr = initializer.expr()?;
+
+    let (extracting_arm, diverging_arm) = match find_arms(ctx, &initializer) {
+        Some(it) => it,
+        None => return None,
+    };
+    if extracting_arm.guard().is_some() {
+        cov_mark::hit!(extracting_arm_has_guard);
+        return None;
+    }
+
+    let diverging_arm_expr = diverging_arm.expr()?;
+    let extracting_arm_pat = extracting_arm.pat()?;
+    let extracted_variable = find_extracted_variable(ctx, &extracting_arm)?;
+
+    acc.add(
+        AssistId("convert_match_to_let_else", AssistKind::RefactorRewrite),
+        "Convert match to let-else",
+        let_stmt.syntax().text_range(),
+        |builder| {
+            let extracting_arm_pat = rename_variable(&extracting_arm_pat, extracted_variable, binding);
+            builder.replace(
+                let_stmt.syntax().text_range(),
+                format!("let {extracting_arm_pat} = {initializer_expr} else {{ {diverging_arm_expr} }};")
+            )
+        },
+    )
+}
+
+// Given a pattern, find the name introduced to the surrounding scope.
+fn find_binding(pat: ast::Pat) -> Option<ast::IdentPat> {
+    if let ast::Pat::IdentPat(ident) = pat {
+        Some(ident)
+    } else {
+        None
+    }
+}
+
+// Given a match expression, find extracting and diverging arms.
+fn find_arms(
+    ctx: &AssistContext<'_>,
+    match_expr: &ast::MatchExpr,
+) -> Option<(ast::MatchArm, ast::MatchArm)> {
+    let arms = match_expr.match_arm_list()?.arms().collect::<Vec<_>>();
+    if arms.len() != 2 {
+        return None;
+    }
+
+    let mut extracting = None;
+    let mut diverging = None;
+    for arm in arms {
+        if ctx.sema.type_of_expr(&arm.expr().unwrap()).unwrap().original().is_never() {
+            diverging = Some(arm);
+        } else {
+            extracting = Some(arm);
+        }
+    }
+
+    match (extracting, diverging) {
+        (Some(extracting), Some(diverging)) => Some((extracting, diverging)),
+        _ => {
+            cov_mark::hit!(non_diverging_match);
+            None
+        }
+    }
+}
+
+// Given an extracting arm, find the extracted variable.
+fn find_extracted_variable(ctx: &AssistContext<'_>, arm: &ast::MatchArm) -> Option<ast::Name> {
+    match arm.expr()? {
+        ast::Expr::PathExpr(path) => {
+            let name_ref = path.syntax().descendants().find_map(ast::NameRef::cast)?;
+            match NameRefClass::classify(&ctx.sema, &name_ref)? {
+                NameRefClass::Definition(Definition::Local(local)) => {
+                    let source = local.source(ctx.db()).value.left()?;
+                    Some(source.name()?)
+                }
+                _ => None,
+            }
+        }
+        _ => {
+            cov_mark::hit!(extracting_arm_is_not_an_identity_expr);
+            return None;
+        }
+    }
+}
+
+// Rename `extracted` with `binding` in `pat`.
+fn rename_variable(pat: &ast::Pat, extracted: ast::Name, binding: ast::IdentPat) -> SyntaxNode {
+    let syntax = pat.syntax().clone_for_update();
+    let extracted_syntax = syntax.covering_element(extracted.syntax().text_range());
+
+    // If `extracted` variable is a record field, we should rename it to `binding`,
+    // otherwise we just need to replace `extracted` with `binding`.
+
+    if let Some(record_pat_field) = extracted_syntax.ancestors().find_map(ast::RecordPatField::cast)
+    {
+        if let Some(name_ref) = record_pat_field.field_name() {
+            ted::replace(
+                record_pat_field.syntax(),
+                ast::make::record_pat_field(ast::make::name_ref(&name_ref.text()), binding.into())
+                    .syntax()
+                    .clone_for_update(),
+            );
+        }
+    } else {
+        ted::replace(extracted_syntax, binding.syntax().clone_for_update());
+    }
+
+    syntax
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::tests::{check_assist, check_assist_not_applicable};
+
+    use super::*;
+
+    #[test]
+    fn should_not_be_applicable_for_non_diverging_match() {
+        cov_mark::check!(non_diverging_match);
+        check_assist_not_applicable(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    let val = $0match opt {
+        Some(it) => it,
+        None => (),
+    };
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn should_not_be_applicable_if_extracting_arm_is_not_an_identity_expr() {
+        cov_mark::check_count!(extracting_arm_is_not_an_identity_expr, 2);
+        check_assist_not_applicable(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<i32>) {
+    let val = $0match opt {
+        Some(it) => it + 1,
+        None => return,
+    };
+}
+"#,
+        );
+
+        check_assist_not_applicable(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    let val = $0match opt {
+        Some(it) => {
+            let _ = 1 + 1;
+            it
+        },
+        None => return,
+    };
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn should_not_be_applicable_if_extracting_arm_has_guard() {
+        cov_mark::check!(extracting_arm_has_guard);
+        check_assist_not_applicable(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    let val = $0match opt {
+        Some(it) if 2 > 1 => it,
+        None => return,
+    };
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn basic_pattern() {
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    let val = $0match opt {
+        Some(it) => it,
+        None => return,
+    };
+}
+    "#,
+            r#"
+fn foo(opt: Option<()>) {
+    let Some(val) = opt else { return };
+}
+    "#,
+        );
+    }
+
+    #[test]
+    fn keeps_modifiers() {
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    let ref mut val = $0match opt {
+        Some(it) => it,
+        None => return,
+    };
+}
+    "#,
+            r#"
+fn foo(opt: Option<()>) {
+    let Some(ref mut val) = opt else { return };
+}
+    "#,
+        );
+    }
+
+    #[test]
+    fn nested_pattern() {
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option, result
+fn foo(opt: Option<Result<()>>) {
+    let val = $0match opt {
+        Some(Ok(it)) => it,
+        _ => return,
+    };
+}
+    "#,
+            r#"
+fn foo(opt: Option<Result<()>>) {
+    let Some(Ok(val)) = opt else { return };
+}
+    "#,
+        );
+    }
+
+    #[test]
+    fn works_with_any_diverging_block() {
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    loop {
+        let val = $0match opt {
+            Some(it) => it,
+            None => break,
+        };
+    }
+}
+    "#,
+            r#"
+fn foo(opt: Option<()>) {
+    loop {
+        let Some(val) = opt else { break };
+    }
+}
+    "#,
+        );
+
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    loop {
+        let val = $0match opt {
+            Some(it) => it,
+            None => continue,
+        };
+    }
+}
+    "#,
+            r#"
+fn foo(opt: Option<()>) {
+    loop {
+        let Some(val) = opt else { continue };
+    }
+}
+    "#,
+        );
+
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn panic() -> ! {}
+
+fn foo(opt: Option<()>) {
+    loop {
+        let val = $0match opt {
+            Some(it) => it,
+            None => panic(),
+        };
+    }
+}
+    "#,
+            r#"
+fn panic() -> ! {}
+
+fn foo(opt: Option<()>) {
+    loop {
+        let Some(val) = opt else { panic() };
+    }
+}
+    "#,
+        );
+    }
+
+    #[test]
+    fn struct_pattern() {
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn foo(opt: Option<Point>) {
+    let val = $0match opt {
+        Some(Point { x: 0, y }) => y,
+        _ => return,
+    };
+}
+    "#,
+            r#"
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn foo(opt: Option<Point>) {
+    let Some(Point { x: 0, y: val }) = opt else { return };
+}
+    "#,
+        );
+    }
+
+    #[test]
+    fn renames_whole_binding() {
+        check_assist(
+            convert_match_to_let_else,
+            r#"
+//- minicore: option
+fn foo(opt: Option<i32>) -> Option<i32> {
+    let val = $0match opt {
+        it @ Some(42) => it,
+        _ => return None,
+    };
+    val
+}
+    "#,
+            r#"
+fn foo(opt: Option<i32>) -> Option<i32> {
+    let val @ Some(42) = opt else { return None };
+    val
+}
+    "#,
+        );
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_to_guarded_return.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_to_guarded_return.rs
index cb75619ce..b97be34c5 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_to_guarded_return.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_to_guarded_return.rs
@@ -129,32 +129,15 @@ pub(crate) fn convert_to_guarded_return(acc: &mut Assists, ctx: &AssistContext<'
                 }
                 Some((path, bound_ident)) => {
                     // If-let.
-                    let match_expr = {
-                        let happy_arm = {
-                            let pat = make::tuple_struct_pat(
-                                path,
-                                once(make::ext::simple_ident_pat(make::name("it")).into()),
-                            );
-                            let expr = {
-                                let path = make::ext::ident_path("it");
-                                make::expr_path(path)
-                            };
-                            make::match_arm(once(pat.into()), None, expr)
-                        };
-
-                        let sad_arm = make::match_arm(
-                            // FIXME: would be cool to use `None` or `Err(_)` if appropriate
-                            once(make::wildcard_pat().into()),
-                            None,
-                            early_expression,
-                        );
-
-                        make::expr_match(cond_expr, make::match_arm_list(vec![happy_arm, sad_arm]))
-                    };
-
-                    let let_stmt = make::let_stmt(bound_ident, None, Some(match_expr));
-                    let let_stmt = let_stmt.indent(if_indent_level);
-                    let_stmt.syntax().clone_for_update()
+                    let pat = make::tuple_struct_pat(path, once(bound_ident));
+                    let let_else_stmt = make::let_else_stmt(
+                        pat.into(),
+                        None,
+                        cond_expr,
+                        ast::make::tail_only_block_expr(early_expression),
+                    );
+                    let let_else_stmt = let_else_stmt.indent(if_indent_level);
+                    let_else_stmt.syntax().clone_for_update()
                 }
             };
 
@@ -238,10 +221,7 @@ fn main(n: Option<String>) {
             r#"
 fn main(n: Option<String>) {
     bar();
-    let n = match n {
-        Some(it) => it,
-        _ => return,
-    };
+    let Some(n) = n else { return };
     foo(n);
 
     // comment
@@ -264,10 +244,7 @@ fn main() {
 "#,
             r#"
 fn main() {
-    let x = match Err(92) {
-        Ok(it) => it,
-        _ => return,
-    };
+    let Ok(x) = Err(92) else { return };
     foo(x);
 }
 "#,
@@ -292,10 +269,7 @@ fn main(n: Option<String>) {
             r#"
 fn main(n: Option<String>) {
     bar();
-    let n = match n {
-        Some(it) => it,
-        _ => return,
-    };
+    let Some(n) = n else { return };
     foo(n);
 
     // comment
@@ -323,10 +297,7 @@ fn main(n: Option<String>) {
             r#"
 fn main(n: Option<String>) {
     bar();
-    let mut n = match n {
-        Some(it) => it,
-        _ => return,
-    };
+    let Some(mut n) = n else { return };
     foo(n);
 
     // comment
@@ -354,10 +325,7 @@ fn main(n: Option<&str>) {
             r#"
 fn main(n: Option<&str>) {
     bar();
-    let ref n = match n {
-        Some(it) => it,
-        _ => return,
-    };
+    let Some(ref n) = n else { return };
     foo(n);
 
     // comment
@@ -412,10 +380,7 @@ fn main() {
             r#"
 fn main() {
     while true {
-        let n = match n {
-            Some(it) => it,
-            _ => continue,
-        };
+        let Some(n) = n else { continue };
         foo(n);
         bar();
     }
@@ -469,10 +434,7 @@ fn main() {
             r#"
 fn main() {
     loop {
-        let n = match n {
-            Some(it) => it,
-            _ => continue,
-        };
+        let Some(n) = n else { continue };
         foo(n);
         bar();
     }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_tuple_struct_to_named_struct.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_tuple_struct_to_named_struct.rs
index d8f522708..92e091fca 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_tuple_struct_to_named_struct.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_tuple_struct_to_named_struct.rs
@@ -226,7 +226,13 @@ fn edit_field_references(
 }
 
 fn generate_names(fields: impl Iterator<Item = ast::TupleField>) -> Vec<ast::Name> {
-    fields.enumerate().map(|(i, _)| ast::make::name(&format!("field{}", i + 1))).collect()
+    fields
+        .enumerate()
+        .map(|(i, _)| {
+            let idx = i + 1;
+            ast::make::name(&format!("field{idx}"))
+        })
+        .collect()
 }
 
 #[cfg(test)]
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_two_arm_bool_match_to_matches_macro.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_two_arm_bool_match_to_matches_macro.rs
index 54a7f480a..b1b0f587c 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_two_arm_bool_match_to_matches_macro.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_two_arm_bool_match_to_matches_macro.rs
@@ -58,16 +58,16 @@ pub(crate) fn convert_two_arm_bool_match_to_matches_macro(
         target_range,
         |builder| {
             let mut arm_str = String::new();
-            if let Some(ref pat) = first_arm.pat() {
+            if let Some(pat) = &first_arm.pat() {
                 arm_str += &pat.to_string();
             }
-            if let Some(ref guard) = first_arm.guard() {
-                arm_str += &format!(" {}", &guard.to_string());
+            if let Some(guard) = &first_arm.guard() {
+                arm_str += &format!(" {guard}");
             }
             if invert_matches {
-                builder.replace(target_range, format!("!matches!({}, {})", expr, arm_str));
+                builder.replace(target_range, format!("!matches!({expr}, {arm_str})"));
             } else {
-                builder.replace(target_range, format!("matches!({}, {})", expr, arm_str));
+                builder.replace(target_range, format!("matches!({expr}, {arm_str})"));
             }
         },
     )
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/destructure_tuple_binding.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/destructure_tuple_binding.rs
index dc581ff3b..31c2ce7c1 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/destructure_tuple_binding.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/destructure_tuple_binding.rs
@@ -133,7 +133,7 @@ fn generate_name(
     _usages: &Option<UsageSearchResult>,
 ) -> String {
     // FIXME: detect if name already used
-    format!("_{}", index)
+    format!("_{index}")
 }
 
 enum RefType {
@@ -168,12 +168,12 @@ fn edit_tuple_assignment(
     let add_cursor = |text: &str| {
         // place cursor on first tuple item
         let first_tuple = &data.field_names[0];
-        text.replacen(first_tuple, &format!("$0{}", first_tuple), 1)
+        text.replacen(first_tuple, &format!("$0{first_tuple}"), 1)
     };
 
     // with sub_pattern: keep original tuple and add subpattern: `tup @ (_0, _1)`
     if in_sub_pattern {
-        let text = format!(" @ {}", tuple_pat);
+        let text = format!(" @ {tuple_pat}");
         match ctx.config.snippet_cap {
             Some(cap) => {
                 let snip = add_cursor(&text);
@@ -314,9 +314,9 @@ struct RefData {
 impl RefData {
     fn format(&self, field_name: &str) -> String {
         match (self.needs_deref, self.needs_parentheses) {
-            (true, true) => format!("(*{})", field_name),
-            (true, false) => format!("*{}", field_name),
-            (false, true) => format!("({})", field_name),
+            (true, true) => format!("(*{field_name})"),
+            (true, false) => format!("*{field_name}"),
+            (false, true) => format!("({field_name})"),
             (false, false) => field_name.to_string(),
         }
     }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_function.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_function.rs
index d6c8ea785..c1e2f19ab 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_function.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_function.rs
@@ -109,8 +109,6 @@ pub(crate) fn extract_function(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
             let params =
                 body.extracted_function_params(ctx, &container_info, locals_used.iter().copied());
 
-            let extracted_from_trait_impl = body.extracted_from_trait_impl();
-
             let name = make_function_name(&semantics_scope);
 
             let fun = Function {
@@ -129,8 +127,11 @@ pub(crate) fn extract_function(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
 
             builder.replace(target_range, make_call(ctx, &fun, old_indent));
 
+            let has_impl_wrapper =
+                insert_after.ancestors().any(|a| a.kind() == SyntaxKind::IMPL && a != insert_after);
+
             let fn_def = match fun.self_param_adt(ctx) {
-                Some(adt) if extracted_from_trait_impl => {
+                Some(adt) if anchor == Anchor::Method && !has_impl_wrapper => {
                     let fn_def = format_function(ctx, module, &fun, old_indent, new_indent + 1);
                     generate_impl_text(&adt, &fn_def).replace("{\n\n", "{")
                 }
@@ -181,7 +182,7 @@ fn make_function_name(semantics_scope: &hir::SemanticsScope<'_>) -> ast::NameRef
     let mut counter = 0;
     while names_in_scope.contains(&name) {
         counter += 1;
-        name = format!("{}{}", &default_name, counter)
+        name = format!("{default_name}{counter}")
     }
     make::name_ref(&name)
 }
@@ -272,7 +273,7 @@ enum FunType {
 }
 
 /// Where to put extracted function definition
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq, Clone, Copy)]
 enum Anchor {
     /// Extract free function and put right after current top-level function
     Freestanding,
@@ -1245,6 +1246,14 @@ fn node_to_insert_after(body: &FunctionBody, anchor: Anchor) -> Option<SyntaxNod
     while let Some(next_ancestor) = ancestors.next() {
         match next_ancestor.kind() {
             SyntaxKind::SOURCE_FILE => break,
+            SyntaxKind::IMPL => {
+                if body.extracted_from_trait_impl() && matches!(anchor, Anchor::Method) {
+                    let impl_node = find_non_trait_impl(&next_ancestor);
+                    if let target_node @ Some(_) = impl_node.as_ref().and_then(last_impl_member) {
+                        return target_node;
+                    }
+                }
+            }
             SyntaxKind::ITEM_LIST if !matches!(anchor, Anchor::Freestanding) => continue,
             SyntaxKind::ITEM_LIST => {
                 if ancestors.peek().map(SyntaxNode::kind) == Some(SyntaxKind::MODULE) {
@@ -1265,6 +1274,29 @@ fn node_to_insert_after(body: &FunctionBody, anchor: Anchor) -> Option<SyntaxNod
     last_ancestor
 }
 
+fn find_non_trait_impl(trait_impl: &SyntaxNode) -> Option<ast::Impl> {
+    let as_impl = ast::Impl::cast(trait_impl.clone())?;
+    let impl_type = Some(impl_type_name(&as_impl)?);
+
+    let sibblings = trait_impl.parent()?.children();
+    sibblings
+        .filter_map(ast::Impl::cast)
+        .find(|s| impl_type_name(s) == impl_type && !is_trait_impl(s))
+}
+
+fn last_impl_member(impl_node: &ast::Impl) -> Option<SyntaxNode> {
+    let last_child = impl_node.assoc_item_list()?.assoc_items().last()?;
+    Some(last_child.syntax().clone())
+}
+
+fn is_trait_impl(node: &ast::Impl) -> bool {
+    node.trait_().is_some()
+}
+
+fn impl_type_name(impl_node: &ast::Impl) -> Option<String> {
+    Some(impl_node.self_ty()?.to_string())
+}
+
 fn make_call(ctx: &AssistContext<'_>, fun: &Function, indent: IndentLevel) -> String {
     let ret_ty = fun.return_type(ctx);
 
@@ -1291,19 +1323,23 @@ fn make_call(ctx: &AssistContext<'_>, fun: &Function, indent: IndentLevel) -> St
     match fun.outliving_locals.as_slice() {
         [] => {}
         [var] => {
-            format_to!(buf, "let {}{} = ", mut_modifier(var), var.local.name(ctx.db()))
+            let modifier = mut_modifier(var);
+            let name = var.local.name(ctx.db());
+            format_to!(buf, "let {modifier}{name} = ")
         }
         vars => {
             buf.push_str("let (");
             let bindings = vars.iter().format_with(", ", |local, f| {
-                f(&format_args!("{}{}", mut_modifier(local), local.local.name(ctx.db())))
+                let modifier = mut_modifier(local);
+                let name = local.local.name(ctx.db());
+                f(&format_args!("{modifier}{name}"))
             });
-            format_to!(buf, "{}", bindings);
+            format_to!(buf, "{bindings}");
             buf.push_str(") = ");
         }
     }
 
-    format_to!(buf, "{}", expr);
+    format_to!(buf, "{expr}");
     let insert_comma = fun
         .body
         .parent()
@@ -1447,6 +1483,8 @@ fn format_function(
     new_indent: IndentLevel,
 ) -> String {
     let mut fn_def = String::new();
+
+    let fun_name = &fun.name;
     let params = fun.make_param_list(ctx, module);
     let ret_ty = fun.make_ret_ty(ctx, module);
     let body = make_body(ctx, old_indent, new_indent, fun);
@@ -1454,42 +1492,28 @@ fn format_function(
     let async_kw = if fun.control_flow.is_async { "async " } else { "" };
     let unsafe_kw = if fun.control_flow.is_unsafe { "unsafe " } else { "" };
     let (generic_params, where_clause) = make_generic_params_and_where_clause(ctx, fun);
+
+    format_to!(fn_def, "\n\n{new_indent}{const_kw}{async_kw}{unsafe_kw}");
     match ctx.config.snippet_cap {
-        Some(_) => format_to!(
-            fn_def,
-            "\n\n{}{}{}{}fn $0{}",
-            new_indent,
-            const_kw,
-            async_kw,
-            unsafe_kw,
-            fun.name,
-        ),
-        None => format_to!(
-            fn_def,
-            "\n\n{}{}{}{}fn {}",
-            new_indent,
-            const_kw,
-            async_kw,
-            unsafe_kw,
-            fun.name,
-        ),
+        Some(_) => format_to!(fn_def, "fn $0{fun_name}"),
+        None => format_to!(fn_def, "fn {fun_name}"),
     }
 
     if let Some(generic_params) = generic_params {
-        format_to!(fn_def, "{}", generic_params);
+        format_to!(fn_def, "{generic_params}");
     }
 
-    format_to!(fn_def, "{}", params);
+    format_to!(fn_def, "{params}");
 
     if let Some(ret_ty) = ret_ty {
-        format_to!(fn_def, " {}", ret_ty);
+        format_to!(fn_def, " {ret_ty}");
     }
 
     if let Some(where_clause) = where_clause {
-        format_to!(fn_def, " {}", where_clause);
+        format_to!(fn_def, " {where_clause}");
     }
 
-    format_to!(fn_def, " {}", body);
+    format_to!(fn_def, " {body}");
 
     fn_def
 }
@@ -5060,6 +5084,236 @@ impl Struct {
     }
 
     #[test]
+    fn extract_method_from_trait_with_existing_non_empty_impl_block() {
+        check_assist(
+            extract_function,
+            r#"
+struct Struct(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+
+impl Struct {
+    fn foo() {}
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        $0self.0 + 2$0
+    }
+}
+"#,
+            r#"
+struct Struct(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+
+impl Struct {
+    fn foo() {}
+
+    fn $0fun_name(&self) -> i32 {
+        self.0 + 2
+    }
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        self.fun_name()
+    }
+}
+"#,
+        )
+    }
+
+    #[test]
+    fn extract_function_from_trait_with_existing_non_empty_impl_block() {
+        check_assist(
+            extract_function,
+            r#"
+struct Struct(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+
+impl Struct {
+    fn foo() {}
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        let three_squared = $03 * 3$0;
+        self.0 + three_squared
+    }
+}
+"#,
+            r#"
+struct Struct(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+
+impl Struct {
+    fn foo() {}
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        let three_squared = fun_name();
+        self.0 + three_squared
+    }
+}
+
+fn $0fun_name() -> i32 {
+    3 * 3
+}
+"#,
+        )
+    }
+
+    #[test]
+    fn extract_method_from_trait_with_multiple_existing_impl_blocks() {
+        check_assist(
+            extract_function,
+            r#"
+struct Struct(i32);
+struct StructBefore(i32);
+struct StructAfter(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+
+impl StructBefore {
+    fn foo(){}
+}
+
+impl Struct {
+    fn foo(){}
+}
+
+impl StructAfter {
+    fn foo(){}
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        $0self.0 + 2$0
+    }
+}
+"#,
+            r#"
+struct Struct(i32);
+struct StructBefore(i32);
+struct StructAfter(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+
+impl StructBefore {
+    fn foo(){}
+}
+
+impl Struct {
+    fn foo(){}
+
+    fn $0fun_name(&self) -> i32 {
+        self.0 + 2
+    }
+}
+
+impl StructAfter {
+    fn foo(){}
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        self.fun_name()
+    }
+}
+"#,
+        )
+    }
+
+    #[test]
+    fn extract_method_from_trait_with_multiple_existing_trait_impl_blocks() {
+        check_assist(
+            extract_function,
+            r#"
+struct Struct(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+trait TraitBefore {
+    fn before(&self) -> i32;
+}
+trait TraitAfter {
+    fn after(&self) -> i32;
+}
+
+impl TraitBefore for Struct {
+    fn before(&self) -> i32 {
+        42
+    }
+}
+
+impl Struct {
+    fn foo(){}
+}
+
+impl TraitAfter for Struct {
+    fn after(&self) -> i32 {
+        42
+    }
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        $0self.0 + 2$0
+    }
+}
+"#,
+            r#"
+struct Struct(i32);
+trait Trait {
+    fn bar(&self) -> i32;
+}
+trait TraitBefore {
+    fn before(&self) -> i32;
+}
+trait TraitAfter {
+    fn after(&self) -> i32;
+}
+
+impl TraitBefore for Struct {
+    fn before(&self) -> i32 {
+        42
+    }
+}
+
+impl Struct {
+    fn foo(){}
+
+    fn $0fun_name(&self) -> i32 {
+        self.0 + 2
+    }
+}
+
+impl TraitAfter for Struct {
+    fn after(&self) -> i32 {
+        42
+    }
+}
+
+impl Trait for Struct {
+    fn bar(&self) -> i32 {
+        self.fun_name()
+    }
+}
+"#,
+        )
+    }
+
+    #[test]
     fn closure_arguments() {
         check_assist(
             extract_function,
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_module.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_module.rs
index 897980c66..56834394a 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_module.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_module.rs
@@ -127,7 +127,7 @@ pub(crate) fn extract_module(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
             for item in items_to_be_processed {
                 let item = item.indent(IndentLevel(1));
                 let mut indented_item = String::new();
-                format_to!(indented_item, "{}{}", new_item_indent, item.to_string());
+                format_to!(indented_item, "{new_item_indent}{item}");
                 body_items.push(indented_item);
             }
 
@@ -137,30 +137,28 @@ pub(crate) fn extract_module(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
                 let mut impl_body_def = String::new();
 
                 if let Some(self_ty) = impl_.self_ty() {
-                    format_to!(
-                        impl_body_def,
-                        "{}impl {} {{\n{}\n{}}}",
-                        old_item_indent + 1,
-                        self_ty.to_string(),
-                        body,
-                        old_item_indent + 1
-                    );
-
+                    {
+                        let impl_indent = old_item_indent + 1;
+                        format_to!(
+                            impl_body_def,
+                            "{impl_indent}impl {self_ty} {{\n{body}\n{impl_indent}}}",
+                        );
+                    }
                     body = impl_body_def;
 
                     // Add the import for enum/struct corresponding to given impl block
                     module.make_use_stmt_of_node_with_super(self_ty.syntax());
                     for item in module.use_items {
-                        let mut indented_item = String::new();
-                        format_to!(indented_item, "{}{}", old_item_indent + 1, item.to_string());
-                        body = format!("{}\n\n{}", indented_item, body);
+                        let item_indent = old_item_indent + 1;
+                        body = format!("{item_indent}{item}\n\n{body}");
                     }
                 }
             }
 
             let mut module_def = String::new();
 
-            format_to!(module_def, "mod {} {{\n{}\n{}}}", module.name, body, old_item_indent);
+            let module_name = module.name;
+            format_to!(module_def, "mod {module_name} {{\n{body}\n{old_item_indent}}}");
 
             let mut usages_to_be_updated_for_curr_file = vec![];
             for usages_to_be_updated_for_file in usages_to_be_processed {
@@ -199,7 +197,7 @@ pub(crate) fn extract_module(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
                     builder.delete(range);
                 }
 
-                builder.insert(impl_.syntax().text_range().end(), format!("\n\n{}", module_def));
+                builder.insert(impl_.syntax().text_range().end(), format!("\n\n{module_def}"));
             } else {
                 builder.replace(module.text_range, module_def)
             }
@@ -343,9 +341,10 @@ impl Module {
                 && !self.text_range.contains_range(desc.text_range())
             {
                 if let Some(name_ref) = ast::NameRef::cast(desc) {
+                    let mod_name = self.name;
                     return Some((
                         name_ref.syntax().text_range(),
-                        format!("{}::{}", self.name, name_ref),
+                        format!("{mod_name}::{name_ref}"),
                     ));
                 }
             }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_struct_from_enum_variant.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_struct_from_enum_variant.rs
index 970e948df..b4e10667b 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_struct_from_enum_variant.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_struct_from_enum_variant.rs
@@ -296,10 +296,14 @@ fn create_struct_def(
 
 fn update_variant(variant: &ast::Variant, generics: Option<ast::GenericParamList>) -> Option<()> {
     let name = variant.name()?;
-    let ty = generics
+    let generic_args = generics
         .filter(|generics| generics.generic_params().count() > 0)
-        .map(|generics| make::ty(&format!("{}{}", &name.text(), generics.to_generic_args())))
-        .unwrap_or_else(|| make::ty(&name.text()));
+        .map(|generics| generics.to_generic_args());
+    // FIXME: replace with a `ast::make` constructor
+    let ty = match generic_args {
+        Some(generic_args) => make::ty(&format!("{name}{generic_args}")),
+        None => make::ty(&name.text()),
+    };
 
     // change from a record to a tuple field list
     let tuple_field = make::tuple_field(None, ty);
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_type_alias.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_type_alias.rs
index 03aa8601d..3116935fc 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_type_alias.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_type_alias.rs
@@ -1,8 +1,7 @@
 use either::Either;
 use ide_db::syntax_helpers::node_ext::walk_ty;
-use itertools::Itertools;
 use syntax::{
-    ast::{self, edit::IndentLevel, AstNode, HasGenericParams, HasName},
+    ast::{self, edit::IndentLevel, make, AstNode, HasGenericParams, HasName},
     match_ast,
 };
 
@@ -64,41 +63,29 @@ pub(crate) fn extract_type_alias(acc: &mut Assists, ctx: &AssistContext<'_>) ->
                 known_generics.extend(it.generic_params());
             }
             let generics = collect_used_generics(&ty, &known_generics);
+            let generic_params =
+                generics.map(|it| make::generic_param_list(it.into_iter().cloned()));
 
-            let replacement = if !generics.is_empty() {
-                format!(
-                    "Type<{}>",
-                    generics.iter().format_with(", ", |generic, f| {
-                        match generic {
-                            ast::GenericParam::ConstParam(cp) => f(&cp.name().unwrap()),
-                            ast::GenericParam::LifetimeParam(lp) => f(&lp.lifetime().unwrap()),
-                            ast::GenericParam::TypeParam(tp) => f(&tp.name().unwrap()),
-                        }
-                    })
-                )
-            } else {
-                String::from("Type")
-            };
+            let ty_args = generic_params
+                .as_ref()
+                .map_or(String::new(), |it| it.to_generic_args().to_string());
+            let replacement = format!("Type{ty_args}");
             builder.replace(target, replacement);
 
             let indent = IndentLevel::from_node(node);
-            let generics = if !generics.is_empty() {
-                format!("<{}>", generics.iter().format(", "))
-            } else {
-                String::new()
-            };
+            let generic_params = generic_params.map_or(String::new(), |it| it.to_string());
             match ctx.config.snippet_cap {
                 Some(cap) => {
                     builder.insert_snippet(
                         cap,
                         insert_pos,
-                        format!("type $0Type{} = {};\n\n{}", generics, ty, indent),
+                        format!("type $0Type{generic_params} = {ty};\n\n{indent}"),
                     );
                 }
                 None => {
                     builder.insert(
                         insert_pos,
-                        format!("type Type{} = {};\n\n{}", generics, ty, indent),
+                        format!("type Type{generic_params} = {ty};\n\n{indent}"),
                     );
                 }
             }
@@ -109,7 +96,7 @@ pub(crate) fn extract_type_alias(acc: &mut Assists, ctx: &AssistContext<'_>) ->
 fn collect_used_generics<'gp>(
     ty: &ast::Type,
     known_generics: &'gp [ast::GenericParam],
-) -> Vec<&'gp ast::GenericParam> {
+) -> Option<Vec<&'gp ast::GenericParam>> {
     // can't use a closure -> closure here cause lifetime inference fails for that
     fn find_lifetime(text: &str) -> impl Fn(&&ast::GenericParam) -> bool + '_ {
         move |gp: &&ast::GenericParam| match gp {
@@ -198,7 +185,8 @@ fn collect_used_generics<'gp>(
         ast::GenericParam::LifetimeParam(_) => 0,
         ast::GenericParam::TypeParam(_) => 1,
     });
-    generics
+
+    Some(generics).filter(|it| it.len() > 0)
 }
 
 #[cfg(test)]
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_variable.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_variable.rs
index 3596b6f82..a738deffb 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_variable.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_variable.rs
@@ -91,13 +91,13 @@ pub(crate) fn extract_variable(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
 
             match anchor {
                 Anchor::Before(_) | Anchor::Replace(_) => {
-                    format_to!(buf, "let {}{} = {}", var_modifier, var_name, reference_modifier)
+                    format_to!(buf, "let {var_modifier}{var_name} = {reference_modifier}")
                 }
                 Anchor::WrapInBlock(_) => {
-                    format_to!(buf, "{{ let {} = {}", var_name, reference_modifier)
+                    format_to!(buf, "{{ let {var_name} = {reference_modifier}")
                 }
             };
-            format_to!(buf, "{}", to_extract.syntax());
+            format_to!(buf, "{to_extract}");
 
             if let Anchor::Replace(stmt) = anchor {
                 cov_mark::hit!(test_extract_var_expr_stmt);
@@ -107,8 +107,8 @@ pub(crate) fn extract_variable(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
                 match ctx.config.snippet_cap {
                     Some(cap) => {
                         let snip = buf.replace(
-                            &format!("let {}{}", var_modifier, var_name),
-                            &format!("let {}$0{}", var_modifier, var_name),
+                            &format!("let {var_modifier}{var_name}"),
+                            &format!("let {var_modifier}$0{var_name}"),
                         );
                         edit.replace_snippet(cap, expr_range, snip)
                     }
@@ -135,8 +135,8 @@ pub(crate) fn extract_variable(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
             match ctx.config.snippet_cap {
                 Some(cap) => {
                     let snip = buf.replace(
-                        &format!("let {}{}", var_modifier, var_name),
-                        &format!("let {}$0{}", var_modifier, var_name),
+                        &format!("let {var_modifier}{var_name}"),
+                        &format!("let {var_modifier}$0{var_name}"),
                     );
                     edit.insert_snippet(cap, offset, snip)
                 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/fix_visibility.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/fix_visibility.rs
index b33846f54..d9e00435e 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/fix_visibility.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/fix_visibility.rs
@@ -1,4 +1,4 @@
-use hir::{db::HirDatabase, HasSource, HasVisibility, PathResolution};
+use hir::{db::HirDatabase, HasSource, HasVisibility, ModuleDef, PathResolution, ScopeDef};
 use ide_db::base_db::FileId;
 use syntax::{
     ast::{self, HasVisibility as _},
@@ -18,7 +18,7 @@ use crate::{utils::vis_offset, AssistContext, AssistId, AssistKind, Assists};
 //     fn frobnicate() {}
 // }
 // fn main() {
-//     m::frobnicate$0() {}
+//     m::frobnicate$0();
 // }
 // ```
 // ->
@@ -27,7 +27,7 @@ use crate::{utils::vis_offset, AssistContext, AssistId, AssistKind, Assists};
 //     $0pub(crate) fn frobnicate() {}
 // }
 // fn main() {
-//     m::frobnicate() {}
+//     m::frobnicate();
 // }
 // ```
 pub(crate) fn fix_visibility(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
@@ -37,11 +37,15 @@ pub(crate) fn fix_visibility(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
 
 fn add_vis_to_referenced_module_def(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
     let path: ast::Path = ctx.find_node_at_offset()?;
-    let path_res = ctx.sema.resolve_path(&path)?;
-    let def = match path_res {
-        PathResolution::Def(def) => def,
-        _ => return None,
-    };
+    let qualifier = path.qualifier()?;
+    let name_ref = path.segment()?.name_ref()?;
+    let qualifier_res = ctx.sema.resolve_path(&qualifier)?;
+    let PathResolution::Def(ModuleDef::Module(module)) = qualifier_res else { return None; };
+    let (_, def) = module
+        .scope(ctx.db(), None)
+        .into_iter()
+        .find(|(name, _)| name.to_smol_str() == name_ref.text().as_str())?;
+    let ScopeDef::ModuleDef(def) = def else { return None; };
 
     let current_module = ctx.sema.scope(path.syntax())?.module();
     let target_module = def.module(ctx.db())?;
@@ -57,8 +61,8 @@ fn add_vis_to_referenced_module_def(acc: &mut Assists, ctx: &AssistContext<'_>)
         if current_module.krate() == target_module.krate() { "pub(crate)" } else { "pub" };
 
     let assist_label = match target_name {
-        None => format!("Change visibility to {}", missing_visibility),
-        Some(name) => format!("Change visibility of {} to {}", name, missing_visibility),
+        None => format!("Change visibility to {missing_visibility}"),
+        Some(name) => format!("Change visibility of {name} to {missing_visibility}"),
     };
 
     acc.add(AssistId("fix_visibility", AssistKind::QuickFix), assist_label, target, |builder| {
@@ -68,15 +72,15 @@ fn add_vis_to_referenced_module_def(acc: &mut Assists, ctx: &AssistContext<'_>)
                 Some(current_visibility) => builder.replace_snippet(
                     cap,
                     current_visibility.syntax().text_range(),
-                    format!("$0{}", missing_visibility),
+                    format!("$0{missing_visibility}"),
                 ),
-                None => builder.insert_snippet(cap, offset, format!("$0{} ", missing_visibility)),
+                None => builder.insert_snippet(cap, offset, format!("$0{missing_visibility} ")),
             },
             None => match current_visibility {
                 Some(current_visibility) => {
                     builder.replace(current_visibility.syntax().text_range(), missing_visibility)
                 }
-                None => builder.insert(offset, format!("{} ", missing_visibility)),
+                None => builder.insert(offset, format!("{missing_visibility} ")),
             },
         }
     })
@@ -114,7 +118,7 @@ fn add_vis_to_referenced_record_field(acc: &mut Assists, ctx: &AssistContext<'_>
 
     let target_name = record_field_def.name(ctx.db());
     let assist_label =
-        format!("Change visibility of {}.{} to {}", parent_name, target_name, missing_visibility);
+        format!("Change visibility of {parent_name}.{target_name} to {missing_visibility}");
 
     acc.add(AssistId("fix_visibility", AssistKind::QuickFix), assist_label, target, |builder| {
         builder.edit_file(target_file);
@@ -123,15 +127,15 @@ fn add_vis_to_referenced_record_field(acc: &mut Assists, ctx: &AssistContext<'_>
                 Some(current_visibility) => builder.replace_snippet(
                     cap,
                     current_visibility.syntax().text_range(),
-                    format!("$0{}", missing_visibility),
+                    format!("$0{missing_visibility}"),
                 ),
-                None => builder.insert_snippet(cap, offset, format!("$0{} ", missing_visibility)),
+                None => builder.insert_snippet(cap, offset, format!("$0{missing_visibility} ")),
             },
             None => match current_visibility {
                 Some(current_visibility) => {
                     builder.replace(current_visibility.syntax().text_range(), missing_visibility)
                 }
-                None => builder.insert(offset, format!("{} ", missing_visibility)),
+                None => builder.insert(offset, format!("{missing_visibility} ")),
             },
         }
     })
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_projection_method.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_projection_method.rs
index bdd3cf4f0..c9aa41c84 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_projection_method.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_projection_method.rs
@@ -124,6 +124,7 @@ fn generate_enum_projection_method(
         happy_case,
         sad_case,
     } = props;
+
     let variant = ctx.find_node_at_offset::<ast::Variant>()?;
     let variant_name = variant.name()?;
     let parent_enum = ast::Adt::Enum(variant.parent_enum());
@@ -144,7 +145,7 @@ fn generate_enum_projection_method(
         ast::StructKind::Unit => return None,
     };
 
-    let fn_name = format!("{}_{}", fn_name_prefix, &to_lower_snake_case(&variant_name.text()));
+    let fn_name = format!("{fn_name_prefix}_{}", &to_lower_snake_case(&variant_name.text()));
 
     // Return early if we've found an existing new fn
     let impl_def = find_struct_impl(ctx, &parent_enum, &[fn_name.clone()])?;
@@ -156,15 +157,25 @@ fn generate_enum_projection_method(
         assist_description,
         target,
         |builder| {
-            let vis = parent_enum.visibility().map_or(String::new(), |v| format!("{v} "));
+            let vis = parent_enum.visibility().map_or(String::new(), |v| format!("{} ", v));
+
+            let field_type_syntax = field_type.syntax();
+
+            let must_use = if ctx.config.assist_emit_must_use {
+                "#[must_use]\n    "
+            } else {
+                ""
+            };
+
             let method = format!(
-                "    {vis}fn {fn_name}({self_param}) -> {return_prefix}{field_type}{return_suffix} {{
+                "    {must_use}{vis}fn {fn_name}({self_param}) -> {return_prefix}{field_type_syntax}{return_suffix} {{
         if let Self::{variant_name}{pattern_suffix} = self {{
             {happy_case}({bound_name})
         }} else {{
             {sad_case}
         }}
-    }}");
+    }}"
+            );
 
             add_method_to_adt(builder, &parent_enum, impl_def, &method);
         },
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_variant.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_variant.rs
index 35cd42908..0bcb57283 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_variant.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_enum_variant.rs
@@ -261,12 +261,12 @@ fn main() {
 }
 
 //- /foo.rs
-enum Foo {
+pub enum Foo {
     Bar,
 }
 ",
             r"
-enum Foo {
+pub enum Foo {
     Bar,
     Baz,
 }
@@ -310,7 +310,7 @@ fn main() {
             generate_enum_variant,
             r"
 mod m {
-    enum Foo {
+    pub enum Foo {
         Bar,
     }
 }
@@ -320,7 +320,7 @@ fn main() {
 ",
             r"
 mod m {
-    enum Foo {
+    pub enum Foo {
         Bar,
         Baz,
     }
@@ -516,10 +516,10 @@ mod foo;
 use foo::Foo::Bar$0;
 
 //- /foo.rs
-enum Foo {}
+pub enum Foo {}
 ",
             r"
-enum Foo {
+pub enum Foo {
     Bar,
 }
 ",
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_function.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_function.rs
index c229127e4..57f198748 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_function.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_function.rs
@@ -1324,7 +1324,7 @@ fn foo() {
             generate_function,
             r"
 mod bar {
-    mod baz {}
+    pub mod baz {}
 }
 
 fn foo() {
@@ -1333,7 +1333,7 @@ fn foo() {
 ",
             r"
 mod bar {
-    mod baz {
+    pub mod baz {
         pub(crate) fn my_fn() {
             ${0:todo!()}
         }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_call.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_call.rs
index 9f51cdaf8..0c546ce5d 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_call.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_call.rs
@@ -1,3 +1,5 @@
+use std::collections::BTreeSet;
+
 use ast::make;
 use either::Either;
 use hir::{db::HirDatabase, PathResolution, Semantics, TypeInfo};
@@ -190,10 +192,10 @@ pub(crate) fn inline_call(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<
                 PathResolution::Def(hir::ModuleDef::Function(f)) => f,
                 _ => return None,
             };
-            (function, format!("Inline `{}`", path))
+            (function, format!("Inline `{path}`"))
         }
         ast::CallableExpr::MethodCall(call) => {
-            (ctx.sema.resolve_method_call(call)?, format!("Inline `{}`", name_ref))
+            (ctx.sema.resolve_method_call(call)?, format!("Inline `{name_ref}`"))
         }
     };
 
@@ -373,8 +375,44 @@ fn inline(
                 })
         }
     }
+
+    let mut func_let_vars: BTreeSet<String> = BTreeSet::new();
+
+    // grab all of the local variable declarations in the function
+    for stmt in fn_body.statements() {
+        if let Some(let_stmt) = ast::LetStmt::cast(stmt.syntax().to_owned()) {
+            for has_token in let_stmt.syntax().children_with_tokens() {
+                if let Some(node) = has_token.as_node() {
+                    if let Some(ident_pat) = ast::IdentPat::cast(node.to_owned()) {
+                        func_let_vars.insert(ident_pat.syntax().text().to_string());
+                    }
+                }
+            }
+        }
+    }
+
     // Inline parameter expressions or generate `let` statements depending on whether inlining works or not.
     for ((pat, param_ty, _), usages, expr) in izip!(params, param_use_nodes, arguments).rev() {
+        // izip confuses RA due to our lack of hygiene info currently losing us type info causing incorrect errors
+        let usages: &[ast::PathExpr] = &*usages;
+        let expr: &ast::Expr = expr;
+
+        let insert_let_stmt = || {
+            let ty = sema.type_of_expr(expr).filter(TypeInfo::has_adjustment).and(param_ty.clone());
+            if let Some(stmt_list) = body.stmt_list() {
+                stmt_list.push_front(
+                    make::let_stmt(pat.clone(), ty, Some(expr.clone())).clone_for_update().into(),
+                )
+            }
+        };
+
+        // check if there is a local var in the function that conflicts with parameter
+        // if it does then emit a let statement and continue
+        if func_let_vars.contains(&expr.syntax().text().to_string()) {
+            insert_let_stmt();
+            continue;
+        }
+
         let inline_direct = |usage, replacement: &ast::Expr| {
             if let Some(field) = path_expr_as_record_field(usage) {
                 cov_mark::hit!(inline_call_inline_direct_field);
@@ -383,9 +421,7 @@ fn inline(
                 ted::replace(usage.syntax(), &replacement.syntax().clone_for_update());
             }
         };
-        // izip confuses RA due to our lack of hygiene info currently losing us type info causing incorrect errors
-        let usages: &[ast::PathExpr] = &*usages;
-        let expr: &ast::Expr = expr;
+
         match usages {
             // inline single use closure arguments
             [usage]
@@ -408,18 +444,11 @@ fn inline(
             }
             // can't inline, emit a let statement
             _ => {
-                let ty =
-                    sema.type_of_expr(expr).filter(TypeInfo::has_adjustment).and(param_ty.clone());
-                if let Some(stmt_list) = body.stmt_list() {
-                    stmt_list.push_front(
-                        make::let_stmt(pat.clone(), ty, Some(expr.clone()))
-                            .clone_for_update()
-                            .into(),
-                    )
-                }
+                insert_let_stmt();
             }
         }
     }
+
     if let Some(generic_arg_list) = generic_arg_list.clone() {
         if let Some((target, source)) = &sema.scope(node.syntax()).zip(sema.scope(fn_body.syntax()))
         {
@@ -1256,4 +1285,37 @@ impl A {
 "#,
         )
     }
+
+    #[test]
+    fn local_variable_shadowing_callers_argument() {
+        check_assist(
+            inline_call,
+            r#"
+fn foo(bar: u32, baz: u32) -> u32 {
+    let a = 1;
+    bar * baz * a * 6
+}
+fn main() {
+    let a = 7;
+    let b = 1;
+    let res = foo$0(a, b);
+}
+"#,
+            r#"
+fn foo(bar: u32, baz: u32) -> u32 {
+    let a = 1;
+    bar * baz * a * 6
+}
+fn main() {
+    let a = 7;
+    let b = 1;
+    let res = {
+        let bar = a;
+        let a = 1;
+        bar * b * a * 6
+    };
+}
+"#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_local_variable.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_local_variable.rs
index 7259d6781..ce44100e3 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_local_variable.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/inline_local_variable.rs
@@ -113,7 +113,7 @@ pub(crate) fn inline_local_variable(acc: &mut Assists, ctx: &AssistContext<'_>)
         .collect::<Option<Vec<_>>>()?;
 
     let init_str = initializer_expr.syntax().text().to_string();
-    let init_in_paren = format!("({})", &init_str);
+    let init_in_paren = format!("({init_str})");
 
     let target = match target {
         ast::NameOrNameRef::Name(it) => it.syntax().text_range(),
@@ -132,7 +132,7 @@ pub(crate) fn inline_local_variable(acc: &mut Assists, ctx: &AssistContext<'_>)
                 let replacement = if should_wrap { &init_in_paren } else { &init_str };
                 if ast::RecordExprField::for_field_name(&name).is_some() {
                     cov_mark::hit!(inline_field_shorthand);
-                    builder.insert(range.end(), format!(": {}", replacement));
+                    builder.insert(range.end(), format!(": {replacement}"));
                 } else {
                     builder.replace(range, replacement.clone())
                 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/introduce_named_lifetime.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/introduce_named_lifetime.rs
index 2fc754e3e..a54dc4f96 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/introduce_named_lifetime.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/introduce_named_lifetime.rs
@@ -127,7 +127,7 @@ fn generate_unique_lifetime_param_name(
         Some(type_params) => {
             let used_lifetime_params: FxHashSet<_> =
                 type_params.lifetime_params().map(|p| p.syntax().text().to_string()).collect();
-            ('a'..='z').map(|it| format!("'{}", it)).find(|it| !used_lifetime_params.contains(it))
+            ('a'..='z').map(|it| format!("'{it}")).find(|it| !used_lifetime_params.contains(it))
         }
         None => Some("'a".to_string()),
     }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/merge_match_arms.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/merge_match_arms.rs
index c24015b1c..641c90885 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/merge_match_arms.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/merge_match_arms.rs
@@ -78,7 +78,7 @@ pub(crate) fn merge_match_arms(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
                     .join(" | ")
             };
 
-            let arm = format!("{} => {},", pats, current_expr.syntax().text());
+            let arm = format!("{pats} => {current_expr},");
 
             if let [first, .., last] = &*arms_to_merge {
                 let start = first.syntax().text_range().start();
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_format_string_arg.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_format_string_arg.rs
index aa710d2ce..11db6ae7f 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_format_string_arg.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_format_string_arg.rs
@@ -92,7 +92,7 @@ pub(crate) fn move_format_string_arg(acc: &mut Assists, ctx: &AssistContext<'_>)
                         NodeOrToken::Node(n) => {
                             format_to!(current_arg, "{n}");
                         },
-                        NodeOrToken::Token(t) if t.kind() == COMMA=> {
+                        NodeOrToken::Token(t) if t.kind() == COMMA => {
                             existing_args.push(current_arg.trim().into());
                             current_arg.clear();
                         },
@@ -238,14 +238,14 @@ fn main() {
             &add_macro_decl(
                 r#"
 fn main() {
-    print!("{} {x + 1:b} {Struct(1, 2)}$0", 1);
+    print!("{:b} {x + 1:b} {Struct(1, 2)}$0", 1);
 }
 "#,
             ),
             &add_macro_decl(
                 r#"
 fn main() {
-    print!("{} {:b} {}"$0, 1, x + 1, Struct(1, 2));
+    print!("{:b} {:b} {}"$0, 1, x + 1, Struct(1, 2));
 }
 "#,
             ),
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_from_mod_rs.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_from_mod_rs.rs
index a6c85a2b1..1728c03cd 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_from_mod_rs.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_from_mod_rs.rs
@@ -40,11 +40,11 @@ pub(crate) fn move_from_mod_rs(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
 
     let target = source_file.syntax().text_range();
     let module_name = module.name(ctx.db())?.to_string();
-    let path = format!("../{}.rs", module_name);
+    let path = format!("../{module_name}.rs");
     let dst = AnchoredPathBuf { anchor: ctx.file_id(), path };
     acc.add(
         AssistId("move_from_mod_rs", AssistKind::Refactor),
-        format!("Convert {}/mod.rs to {}.rs", module_name, module_name),
+        format!("Convert {module_name}/mod.rs to {module_name}.rs"),
         target,
         |builder| {
             builder.move_file(ctx.file_id(), dst);
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_guard.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_guard.rs
index b8f1b36de..ec3281619 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_guard.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_guard.rs
@@ -133,16 +133,16 @@ pub(crate) fn move_arm_cond_to_match_guard(
             };
             let then_arm_end = match_arm.syntax().text_range().end();
             let indent_level = match_arm.indent_level();
-            let spaces = "    ".repeat(indent_level.0 as _);
+            let spaces = indent_level;
 
             let mut first = true;
             for (cond, block) in conds_blocks {
                 if !first {
-                    edit.insert(then_arm_end, format!("\n{}", spaces));
+                    edit.insert(then_arm_end, format!("\n{spaces}"));
                 } else {
                     first = false;
                 }
-                let guard = format!("{} if {} => ", match_pat, cond.syntax().text());
+                let guard = format!("{match_pat} if {cond} => ");
                 edit.insert(then_arm_end, guard);
                 let only_expr = block.statements().next().is_none();
                 match &block.tail_expr() {
@@ -158,7 +158,7 @@ pub(crate) fn move_arm_cond_to_match_guard(
             }
             if let Some(e) = tail {
                 cov_mark::hit!(move_guard_ifelse_else_tail);
-                let guard = format!("\n{}{} => ", spaces, match_pat);
+                let guard = format!("\n{spaces}{match_pat} => ");
                 edit.insert(then_arm_end, guard);
                 let only_expr = e.statements().next().is_none();
                 match &e.tail_expr() {
@@ -183,7 +183,7 @@ pub(crate) fn move_arm_cond_to_match_guard(
                     {
                         cov_mark::hit!(move_guard_ifelse_has_wildcard);
                     }
-                    _ => edit.insert(then_arm_end, format!("\n{}{} => {{}}", spaces, match_pat)),
+                    _ => edit.insert(then_arm_end, format!("\n{spaces}{match_pat} => {{}}")),
                 }
             }
         },
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_module_to_file.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_module_to_file.rs
index 7468318a5..a7c605325 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_module_to_file.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_module_to_file.rs
@@ -52,7 +52,7 @@ pub(crate) fn move_module_to_file(acc: &mut Assists, ctx: &AssistContext<'_>) ->
                 let mut buf = String::from("./");
                 match parent_module.name(ctx.db()) {
                     Some(name) if !parent_module.is_mod_rs(ctx.db()) => {
-                        format_to!(buf, "{}/", name)
+                        format_to!(buf, "{name}/")
                     }
                     _ => (),
                 }
@@ -82,7 +82,7 @@ pub(crate) fn move_module_to_file(acc: &mut Assists, ctx: &AssistContext<'_>) ->
                 items
             };
 
-            let buf = format!("mod {};", module_name);
+            let buf = format!("mod {module_name};");
 
             let replacement_start = match module_ast.mod_token() {
                 Some(mod_token) => mod_token.text_range(),
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_to_mod_rs.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_to_mod_rs.rs
index a909ce8b2..076d25411 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_to_mod_rs.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/move_to_mod_rs.rs
@@ -40,11 +40,11 @@ pub(crate) fn move_to_mod_rs(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opti
 
     let target = source_file.syntax().text_range();
     let module_name = module.name(ctx.db())?.to_string();
-    let path = format!("./{}/mod.rs", module_name);
+    let path = format!("./{module_name}/mod.rs");
     let dst = AnchoredPathBuf { anchor: ctx.file_id(), path };
     acc.add(
         AssistId("move_to_mod_rs", AssistKind::Refactor),
-        format!("Convert {}.rs to {}/mod.rs", module_name, module_name),
+        format!("Convert {module_name}.rs to {module_name}/mod.rs"),
         target,
         |builder| {
             builder.move_file(ctx.file_id(), dst);
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/number_representation.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/number_representation.rs
index 424db7437..7e3fef516 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/number_representation.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/number_representation.rs
@@ -38,7 +38,7 @@ pub(crate) fn reformat_number_literal(acc: &mut Assists, ctx: &AssistContext<'_>
     converted.push_str(suffix);
 
     let group_id = GroupLabel("Reformat number literal".into());
-    let label = format!("Convert {} to {}", literal, converted);
+    let label = format!("Convert {literal} to {converted}");
     let range = literal.syntax().text_range();
     acc.add_group(
         &group_id,
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_method_call.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_method_call.rs
index e57d1d065..1ea87429c 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_method_call.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_method_call.rs
@@ -54,7 +54,7 @@ pub(crate) fn qualify_method_call(acc: &mut Assists, ctx: &AssistContext<'_>) ->
 
     acc.add(
         AssistId("qualify_method_call", AssistKind::RefactorInline),
-        format!("Qualify `{}` method call", ident.text()),
+        format!("Qualify `{ident}` method call"),
         range,
         |builder| {
             qualify_candidate.qualify(
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_path.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_path.rs
index 4b2af550b..e759e1561 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_path.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/qualify_path.rs
@@ -118,14 +118,14 @@ impl QualifyCandidate<'_> {
         match self {
             QualifyCandidate::QualifierStart(segment, generics) => {
                 let generics = generics.as_ref().map_or_else(String::new, ToString::to_string);
-                replacer(format!("{}{}::{}", import, generics, segment));
+                replacer(format!("{import}{generics}::{segment}"));
             }
             QualifyCandidate::UnqualifiedName(generics) => {
                 let generics = generics.as_ref().map_or_else(String::new, ToString::to_string);
-                replacer(format!("{}{}", import, generics));
+                replacer(format!("{import}{generics}"));
             }
             QualifyCandidate::TraitAssocItem(qualifier, segment) => {
-                replacer(format!("<{} as {}>::{}", qualifier, import, segment));
+                replacer(format!("<{qualifier} as {import}>::{segment}"));
             }
             QualifyCandidate::TraitMethod(db, mcall_expr) => {
                 Self::qualify_trait_method(db, mcall_expr, replacer, import, item);
@@ -155,16 +155,11 @@ impl QualifyCandidate<'_> {
                 hir::Access::Exclusive => make::expr_ref(receiver, true),
                 hir::Access::Owned => receiver,
             };
-            replacer(format!(
-                "{}::{}{}{}",
-                import,
-                method_name,
-                generics,
-                match arg_list {
-                    Some(args) => make::arg_list(iter::once(receiver).chain(args)),
-                    None => make::arg_list(iter::once(receiver)),
-                }
-            ));
+            let arg_list = match arg_list {
+                Some(args) => make::arg_list(iter::once(receiver).chain(args)),
+                None => make::arg_list(iter::once(receiver)),
+            };
+            replacer(format!("{import}::{method_name}{generics}{arg_list}"));
         }
         Some(())
     }
@@ -218,15 +213,17 @@ fn group_label(candidate: &ImportCandidate) -> GroupLabel {
         }
     }
     .text();
-    GroupLabel(format!("Qualify {}", name))
+    GroupLabel(format!("Qualify {name}"))
 }
 
 fn label(candidate: &ImportCandidate, import: &LocatedImport) -> String {
+    let import_path = &import.import_path;
+
     match candidate {
         ImportCandidate::Path(candidate) if candidate.qualifier.is_none() => {
-            format!("Qualify as `{}`", import.import_path)
+            format!("Qualify as `{import_path}`")
         }
-        _ => format!("Qualify with `{}`", import.import_path),
+        _ => format!("Qualify with `{import_path}`"),
     }
 }
 
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/raw_string.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/raw_string.rs
index dbe8cb7bf..c9bc25b27 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/raw_string.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/raw_string.rs
@@ -34,13 +34,10 @@ pub(crate) fn make_raw_string(acc: &mut Assists, ctx: &AssistContext<'_>) -> Opt
             let hashes = "#".repeat(required_hashes(&value).max(1));
             if matches!(value, Cow::Borrowed(_)) {
                 // Avoid replacing the whole string to better position the cursor.
-                edit.insert(token.syntax().text_range().start(), format!("r{}", hashes));
+                edit.insert(token.syntax().text_range().start(), format!("r{hashes}"));
                 edit.insert(token.syntax().text_range().end(), hashes);
             } else {
-                edit.replace(
-                    token.syntax().text_range(),
-                    format!("r{}\"{}\"{}", hashes, value, hashes),
-                );
+                edit.replace(token.syntax().text_range(), format!("r{hashes}\"{value}\"{hashes}"));
             }
         },
     )
@@ -83,7 +80,7 @@ pub(crate) fn make_usual_string(acc: &mut Assists, ctx: &AssistContext<'_>) -> O
                 }
             }
 
-            edit.replace(token.syntax().text_range(), format!("\"{}\"", escaped));
+            edit.replace(token.syntax().text_range(), format!("\"{escaped}\""));
         },
     )
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs
index afaa7c933..99ae60e07 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs
@@ -1,7 +1,7 @@
 use itertools::Itertools;
 use syntax::{
     ast::{self, AstNode, AstToken},
-    match_ast, NodeOrToken, SyntaxElement, TextSize, T,
+    match_ast, NodeOrToken, SyntaxElement, TextRange, TextSize, T,
 };
 
 use crate::{AssistContext, AssistId, AssistKind, Assists};
@@ -22,7 +22,36 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 // }
 // ```
 pub(crate) fn remove_dbg(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
-    let macro_call = ctx.find_node_at_offset::<ast::MacroCall>()?;
+    let macro_calls = if ctx.has_empty_selection() {
+        vec![ctx.find_node_at_offset::<ast::MacroCall>()?]
+    } else {
+        ctx.covering_element()
+            .as_node()?
+            .descendants()
+            .filter(|node| ctx.selection_trimmed().contains_range(node.text_range()))
+            .filter_map(ast::MacroCall::cast)
+            .collect()
+    };
+
+    let replacements =
+        macro_calls.into_iter().filter_map(compute_dbg_replacement).collect::<Vec<_>>();
+    if replacements.is_empty() {
+        return None;
+    }
+
+    acc.add(
+        AssistId("remove_dbg", AssistKind::Refactor),
+        "Remove dbg!()",
+        ctx.selection_trimmed(),
+        |builder| {
+            for (range, text) in replacements {
+                builder.replace(range, text);
+            }
+        },
+    )
+}
+
+fn compute_dbg_replacement(macro_call: ast::MacroCall) -> Option<(TextRange, String)> {
     let tt = macro_call.token_tree()?;
     let r_delim = NodeOrToken::Token(tt.right_delimiter_token()?);
     if macro_call.path()?.segment()?.name_ref()?.text() != "dbg"
@@ -41,7 +70,7 @@ pub(crate) fn remove_dbg(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<(
 
     let macro_expr = ast::MacroExpr::cast(macro_call.syntax().parent()?)?;
     let parent = macro_expr.syntax().parent()?;
-    let (range, text) = match &*input_expressions {
+    Some(match &*input_expressions {
         // dbg!()
         [] => {
             match_ast! {
@@ -102,15 +131,11 @@ pub(crate) fn remove_dbg(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<(
             };
             (
                 macro_call.syntax().text_range(),
-                if wrap { format!("({})", expr) } else { expr.to_string() },
+                if wrap { format!("({expr})") } else { expr.to_string() },
             )
         }
         // dbg!(expr0, expr1, ...)
         exprs => (macro_call.syntax().text_range(), format!("({})", exprs.iter().format(", "))),
-    };
-
-    acc.add(AssistId("remove_dbg", AssistKind::Refactor), "Remove dbg!()", range, |builder| {
-        builder.replace(range, text);
     })
 }
 
@@ -127,8 +152,8 @@ mod tests {
     fn check(ra_fixture_before: &str, ra_fixture_after: &str) {
         check_assist(
             remove_dbg,
-            &format!("fn main() {{\n{}\n}}", ra_fixture_before),
-            &format!("fn main() {{\n{}\n}}", ra_fixture_after),
+            &format!("fn main() {{\n{ra_fixture_before}\n}}"),
+            &format!("fn main() {{\n{ra_fixture_after}\n}}"),
         );
     }
 
@@ -238,4 +263,28 @@ fn foo() {
         check(r#"$0dbg!(0, 1)"#, r#"(0, 1)"#);
         check(r#"$0dbg!(0, (1, 2))"#, r#"(0, (1, 2))"#);
     }
+
+    #[test]
+    fn test_range() {
+        check(
+            r#"
+fn f() {
+    dbg!(0) + $0dbg!(1);
+    dbg!(())$0
+}
+"#,
+            r#"
+fn f() {
+    dbg!(0) + 1;
+    ()
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn test_range_partial() {
+        check_assist_not_applicable(remove_dbg, r#"$0dbg$0!(0)"#);
+        check_assist_not_applicable(remove_dbg, r#"$0dbg!(0$0)"#);
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_derive_with_manual_impl.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_derive_with_manual_impl.rs
index 9fd5e1886..6fa15b28e 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_derive_with_manual_impl.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_derive_with_manual_impl.rs
@@ -124,7 +124,7 @@ fn add_assist(
 ) -> Option<()> {
     let target = attr.syntax().text_range();
     let annotated_name = adt.name()?;
-    let label = format!("Convert to manual `impl {} for {}`", replace_trait_path, annotated_name);
+    let label = format!("Convert to manual `impl {replace_trait_path} for {annotated_name}`");
 
     acc.add(
         AssistId("replace_derive_with_manual_impl", AssistKind::Refactor),
@@ -158,11 +158,8 @@ fn add_assist(
                         }
                     }
 
-                    builder.insert_snippet(
-                        cap,
-                        insert_pos,
-                        format!("\n\n{}", render_snippet(cap, impl_def.syntax(), cursor)),
-                    )
+                    let rendered = render_snippet(cap, impl_def.syntax(), cursor);
+                    builder.insert_snippet(cap, insert_pos, format!("\n\n{rendered}"))
                 }
             };
         },
@@ -1022,8 +1019,6 @@ struct Foo {
 impl foo::Bar for Foo {
     $0type Qux;
 
-    const Baz: usize = 42;
-
     const Fez: usize;
 
     fn foo() {
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_or_with_or_else.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_or_with_or_else.rs
index 7d91be621..77382056c 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_or_with_or_else.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_or_with_or_else.rs
@@ -62,7 +62,7 @@ pub(crate) fn replace_or_with_or_else(acc: &mut Assists, ctx: &AssistContext<'_>
 
     acc.add(
         AssistId("replace_or_with_or_else", AssistKind::RefactorRewrite),
-        format!("Replace {} with {}", name.text(), replace),
+        format!("Replace {name} with {replace}"),
         call.syntax().text_range(),
         |builder| {
             builder.replace(name.syntax().text_range(), replace);
@@ -138,7 +138,7 @@ pub(crate) fn replace_or_else_with_or(acc: &mut Assists, ctx: &AssistContext<'_>
 
     acc.add(
         AssistId("replace_or_else_with_or", AssistKind::RefactorRewrite),
-        format!("Replace {} with {}", name.text(), replace),
+        format!("Replace {name} with {replace}"),
         call.syntax().text_range(),
         |builder| {
             builder.replace(name.syntax().text_range(), replace);
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_turbofish_with_explicit_type.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_turbofish_with_explicit_type.rs
index 521447c26..c177adc7a 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_turbofish_with_explicit_type.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_turbofish_with_explicit_type.rs
@@ -79,7 +79,7 @@ pub(crate) fn replace_turbofish_with_explicit_type(
             "Replace turbofish with explicit type",
             TextRange::new(initializer_start, turbofish_range.end()),
             |builder| {
-                builder.insert(ident_range.end(), format!(": {}", returned_type));
+                builder.insert(ident_range.end(), format!(": {returned_type}"));
                 builder.delete(turbofish_range);
             },
         );
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unnecessary_async.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unnecessary_async.rs
index d5cd2d551..043988322 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unnecessary_async.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unnecessary_async.rs
@@ -44,6 +44,12 @@ pub(crate) fn unnecessary_async(acc: &mut Assists, ctx: &AssistContext<'_>) -> O
     if function.body()?.syntax().descendants().find_map(ast::AwaitExpr::cast).is_some() {
         return None;
     }
+    // Do nothing if the method is a member of trait.
+    if let Some(impl_) = function.syntax().ancestors().nth(2).and_then(ast::Impl::cast) {
+        if let Some(_) = impl_.trait_() {
+            return None;
+        }
+    }
 
     // Remove the `async` keyword plus whitespace after it, if any.
     let async_range = {
@@ -254,4 +260,18 @@ pub async fn f(s: &S) { s.f2() }"#,
     fn does_not_apply_when_not_on_prototype() {
         check_assist_not_applicable(unnecessary_async, "pub async fn f() { $0f2() }")
     }
+
+    #[test]
+    fn does_not_apply_on_async_trait_method() {
+        check_assist_not_applicable(
+            unnecessary_async,
+            r#"
+trait Trait {
+    async fn foo();
+}
+impl Trait for () {
+    $0async fn foo() {}
+}"#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs
index 25c58d086..d09614c51 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs
@@ -69,13 +69,13 @@ pub(crate) fn unwrap_tuple(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option
                 for (pat, ty, expr) in
                     itertools::izip!(tuple_pat.fields(), tys.fields(), tuple_init.fields())
                 {
-                    zipped_decls.push_str(&format!("{}let {pat}: {ty} = {expr};\n", indents))
+                    zipped_decls.push_str(&format!("{indents}let {pat}: {ty} = {expr};\n"))
                 }
                 edit.replace(parent.text_range(), zipped_decls.trim());
             } else {
                 let mut zipped_decls = String::new();
                 for (pat, expr) in itertools::izip!(tuple_pat.fields(), tuple_init.fields()) {
-                    zipped_decls.push_str(&format!("{}let {pat} = {expr};\n", indents));
+                    zipped_decls.push_str(&format!("{indents}let {pat} = {expr};\n"));
                 }
                 edit.replace(parent.text_range(), zipped_decls.trim());
             }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/wrap_return_type_in_result.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/wrap_return_type_in_result.rs
index 83446387d..b6c489eb6 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/wrap_return_type_in_result.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/wrap_return_type_in_result.rs
@@ -76,11 +76,11 @@ pub(crate) fn wrap_return_type_in_result(acc: &mut Assists, ctx: &AssistContext<
 
             match ctx.config.snippet_cap {
                 Some(cap) => {
-                    let snippet = format!("Result<{}, ${{0:_}}>", type_ref);
+                    let snippet = format!("Result<{type_ref}, ${{0:_}}>");
                     builder.replace_snippet(cap, type_ref.syntax().text_range(), snippet)
                 }
                 None => builder
-                    .replace(type_ref.syntax().text_range(), format!("Result<{}, _>", type_ref)),
+                    .replace(type_ref.syntax().text_range(), format!("Result<{type_ref}, _>")),
             }
         },
     )
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs b/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
index a07318cef..387cc6314 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
@@ -120,6 +120,7 @@ mod handlers {
     mod convert_into_to_from;
     mod convert_iter_for_each_to_for;
     mod convert_let_else_to_match;
+    mod convert_match_to_let_else;
     mod convert_tuple_struct_to_named_struct;
     mod convert_named_struct_to_tuple_struct;
     mod convert_to_guarded_return;
@@ -220,6 +221,7 @@ mod handlers {
             convert_iter_for_each_to_for::convert_for_loop_with_for_each,
             convert_let_else_to_match::convert_let_else_to_match,
             convert_named_struct_to_tuple_struct::convert_named_struct_to_tuple_struct,
+            convert_match_to_let_else::convert_match_to_let_else,
             convert_to_guarded_return::convert_to_guarded_return,
             convert_tuple_struct_to_named_struct::convert_tuple_struct_to_named_struct,
             convert_two_arm_bool_match_to_matches_macro::convert_two_arm_bool_match_to_matches_macro,
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/tests.rs b/src/tools/rust-analyzer/crates/ide-assists/src/tests.rs
index f7f2417d0..92ced27c7 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/tests.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/tests.rs
@@ -30,6 +30,7 @@ pub(crate) const TEST_CONFIG: AssistConfig = AssistConfig {
         skip_glob_imports: true,
     },
     prefer_no_std: false,
+    assist_emit_must_use: false,
 };
 
 pub(crate) fn with_single_file(text: &str) -> (RootDatabase, FileId) {
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs b/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
index 2c4000efe..c09317572 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
@@ -408,6 +408,27 @@ fn main() {
 }
 
 #[test]
+fn doctest_convert_match_to_let_else() {
+    check_doc_test(
+        "convert_match_to_let_else",
+        r#####"
+//- minicore: option
+fn foo(opt: Option<()>) {
+    let val = $0match opt {
+        Some(it) => it,
+        None => return,
+    };
+}
+"#####,
+        r#####"
+fn foo(opt: Option<()>) {
+    let Some(val) = opt else { return };
+}
+"#####,
+    )
+}
+
+#[test]
 fn doctest_convert_named_struct_to_tuple_struct() {
     check_doc_test(
         "convert_named_struct_to_tuple_struct",
@@ -720,7 +741,7 @@ mod m {
     fn frobnicate() {}
 }
 fn main() {
-    m::frobnicate$0() {}
+    m::frobnicate$0();
 }
 "#####,
         r#####"
@@ -728,7 +749,7 @@ mod m {
     $0pub(crate) fn frobnicate() {}
 }
 fn main() {
-    m::frobnicate() {}
+    m::frobnicate();
 }
 "#####,
     )
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs b/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs
index db32e7182..68c31b4f8 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs
@@ -119,6 +119,10 @@ pub fn filter_assoc_items(
                 (default_methods, def.body()),
                 (DefaultMethods::Only, Some(_)) | (DefaultMethods::No, None)
             ),
+            ast::AssocItem::Const(def) => matches!(
+                (default_methods, def.body()),
+                (DefaultMethods::Only, Some(_)) | (DefaultMethods::No, None)
+            ),
             _ => default_methods == DefaultMethods::No,
         })
         .collect::<Vec<_>>()
@@ -189,8 +193,8 @@ pub(crate) fn render_snippet(_cap: SnippetCap, node: &SyntaxNode, cursor: Cursor
     let mut placeholder = cursor.node().to_string();
     escape(&mut placeholder);
     let tab_stop = match cursor {
-        Cursor::Replace(placeholder) => format!("${{0:{}}}", placeholder),
-        Cursor::Before(placeholder) => format!("$0{}", placeholder),
+        Cursor::Replace(placeholder) => format!("${{0:{placeholder}}}"),
+        Cursor::Before(placeholder) => format!("$0{placeholder}"),
     };
 
     let mut buf = node.to_string();
@@ -539,17 +543,17 @@ impl ReferenceConversion {
             ReferenceConversionType::AsRefSlice => {
                 let type_argument_name =
                     self.ty.type_arguments().next().unwrap().display(db).to_string();
-                format!("&[{}]", type_argument_name)
+                format!("&[{type_argument_name}]")
             }
             ReferenceConversionType::Dereferenced => {
                 let type_argument_name =
                     self.ty.type_arguments().next().unwrap().display(db).to_string();
-                format!("&{}", type_argument_name)
+                format!("&{type_argument_name}")
             }
             ReferenceConversionType::Option => {
                 let type_argument_name =
                     self.ty.type_arguments().next().unwrap().display(db).to_string();
-                format!("Option<&{}>", type_argument_name)
+                format!("Option<&{type_argument_name}>")
             }
             ReferenceConversionType::Result => {
                 let mut type_arguments = self.ty.type_arguments();
@@ -557,19 +561,19 @@ impl ReferenceConversion {
                     type_arguments.next().unwrap().display(db).to_string();
                 let second_type_argument_name =
                     type_arguments.next().unwrap().display(db).to_string();
-                format!("Result<&{}, &{}>", first_type_argument_name, second_type_argument_name)
+                format!("Result<&{first_type_argument_name}, &{second_type_argument_name}>")
             }
         }
     }
 
     pub(crate) fn getter(&self, field_name: String) -> String {
         match self.conversion {
-            ReferenceConversionType::Copy => format!("self.{}", field_name),
+            ReferenceConversionType::Copy => format!("self.{field_name}"),
             ReferenceConversionType::AsRefStr
             | ReferenceConversionType::AsRefSlice
             | ReferenceConversionType::Dereferenced
             | ReferenceConversionType::Option
-            | ReferenceConversionType::Result => format!("self.{}.as_ref()", field_name),
+            | ReferenceConversionType::Result => format!("self.{field_name}.as_ref()"),
         }
     }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/utils/gen_trait_fn_body.rs b/src/tools/rust-analyzer/crates/ide-assists/src/utils/gen_trait_fn_body.rs
index 7a0c91295..6c87e66c1 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/utils/gen_trait_fn_body.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/utils/gen_trait_fn_body.rs
@@ -41,7 +41,7 @@ fn gen_clone_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
             let mut arms = vec![];
             for variant in list.variants() {
                 let name = variant.name()?;
-                let variant_name = make::ext::path_from_idents(["Self", &format!("{}", name)])?;
+                let variant_name = make::ext::path_from_idents(["Self", &format!("{name}")])?;
 
                 match variant.field_list() {
                     // => match self { Self::Name { x } => Self::Name { x: x.clone() } }
@@ -70,7 +70,7 @@ fn gen_clone_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                         let mut pats = vec![];
                         let mut fields = vec![];
                         for (i, _) in list.fields().enumerate() {
-                            let field_name = format!("arg{}", i);
+                            let field_name = format!("arg{i}");
                             let pat = make::ident_pat(false, false, make::name(&field_name));
                             pats.push(pat.into());
 
@@ -118,7 +118,7 @@ fn gen_clone_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                     let mut fields = vec![];
                     for (i, _) in field_list.fields().enumerate() {
                         let f_path = make::expr_path(make::ext::ident_path("self"));
-                        let target = make::expr_field(f_path, &format!("{}", i));
+                        let target = make::expr_field(f_path, &format!("{i}"));
                         fields.push(gen_clone_call(target));
                     }
                     let struct_name = make::expr_path(make::ext::ident_path("Self"));
@@ -151,7 +151,7 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
             let mut arms = vec![];
             for variant in list.variants() {
                 let name = variant.name()?;
-                let variant_name = make::ext::path_from_idents(["Self", &format!("{}", name)])?;
+                let variant_name = make::ext::path_from_idents(["Self", &format!("{name}")])?;
                 let target = make::expr_path(make::ext::ident_path("f"));
 
                 match variant.field_list() {
@@ -159,7 +159,7 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                         // => f.debug_struct(name)
                         let target = make::expr_path(make::ext::ident_path("f"));
                         let method = make::name_ref("debug_struct");
-                        let struct_name = format!("\"{}\"", name);
+                        let struct_name = format!("\"{name}\"");
                         let args = make::arg_list(Some(make::expr_literal(&struct_name).into()));
                         let mut expr = make::expr_method_call(target, method, args);
 
@@ -173,8 +173,8 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
 
                             // => <expr>.field("field_name", field)
                             let method_name = make::name_ref("field");
-                            let name = make::expr_literal(&(format!("\"{}\"", field_name))).into();
-                            let path = &format!("{}", field_name);
+                            let name = make::expr_literal(&(format!("\"{field_name}\""))).into();
+                            let path = &format!("{field_name}");
                             let path = make::expr_path(make::ext::ident_path(path));
                             let args = make::arg_list(vec![name, path]);
                             expr = make::expr_method_call(expr, method_name, args);
@@ -192,13 +192,13 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                         // => f.debug_tuple(name)
                         let target = make::expr_path(make::ext::ident_path("f"));
                         let method = make::name_ref("debug_tuple");
-                        let struct_name = format!("\"{}\"", name);
+                        let struct_name = format!("\"{name}\"");
                         let args = make::arg_list(Some(make::expr_literal(&struct_name).into()));
                         let mut expr = make::expr_method_call(target, method, args);
 
                         let mut pats = vec![];
                         for (i, _) in list.fields().enumerate() {
-                            let name = format!("arg{}", i);
+                            let name = format!("arg{i}");
 
                             // create a field pattern for use in `MyStruct(fields..)`
                             let field_name = make::name(&name);
@@ -222,7 +222,7 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                         arms.push(make::match_arm(Some(pat.into()), None, expr));
                     }
                     None => {
-                        let fmt_string = make::expr_literal(&(format!("\"{}\"", name))).into();
+                        let fmt_string = make::expr_literal(&(format!("\"{name}\""))).into();
                         let args = make::arg_list([target, fmt_string]);
                         let macro_name = make::expr_path(make::ext::ident_path("write"));
                         let macro_call = make::expr_macro_call(macro_name, args);
@@ -244,7 +244,7 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
         }
 
         ast::Adt::Struct(strukt) => {
-            let name = format!("\"{}\"", annotated_name);
+            let name = format!("\"{annotated_name}\"");
             let args = make::arg_list(Some(make::expr_literal(&name).into()));
             let target = make::expr_path(make::ext::ident_path("f"));
 
@@ -258,10 +258,10 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                     let mut expr = make::expr_method_call(target, method, args);
                     for field in field_list.fields() {
                         let name = field.name()?;
-                        let f_name = make::expr_literal(&(format!("\"{}\"", name))).into();
+                        let f_name = make::expr_literal(&(format!("\"{name}\""))).into();
                         let f_path = make::expr_path(make::ext::ident_path("self"));
                         let f_path = make::expr_ref(f_path, false);
-                        let f_path = make::expr_field(f_path, &format!("{}", name));
+                        let f_path = make::expr_field(f_path, &format!("{name}"));
                         let args = make::arg_list([f_name, f_path]);
                         expr = make::expr_method_call(expr, make::name_ref("field"), args);
                     }
@@ -275,7 +275,7 @@ fn gen_debug_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                     for (i, _) in field_list.fields().enumerate() {
                         let f_path = make::expr_path(make::ext::ident_path("self"));
                         let f_path = make::expr_ref(f_path, false);
-                        let f_path = make::expr_field(f_path, &format!("{}", i));
+                        let f_path = make::expr_field(f_path, &format!("{i}"));
                         let method = make::name_ref("field");
                         expr = make::expr_method_call(expr, method, make::arg_list(Some(f_path)));
                     }
@@ -379,7 +379,7 @@ fn gen_hash_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                 let mut stmts = vec![];
                 for (i, _) in field_list.fields().enumerate() {
                     let base = make::expr_path(make::ext::ident_path("self"));
-                    let target = make::expr_field(base, &format!("{}", i));
+                    let target = make::expr_field(base, &format!("{i}"));
                     stmts.push(gen_hash_call(target));
                 }
                 make::block_expr(stmts, None).indent(ast::edit::IndentLevel(1))
@@ -453,10 +453,10 @@ fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                         for field in list.fields() {
                             let field_name = field.name()?.to_string();
 
-                            let l_name = &format!("l_{}", field_name);
+                            let l_name = &format!("l_{field_name}");
                             l_fields.push(gen_record_pat_field(&field_name, l_name));
 
-                            let r_name = &format!("r_{}", field_name);
+                            let r_name = &format!("r_{field_name}");
                             r_fields.push(gen_record_pat_field(&field_name, r_name));
 
                             let lhs = make::expr_path(make::ext::ident_path(l_name));
@@ -484,12 +484,12 @@ fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                         let mut r_fields = vec![];
 
                         for (i, _) in list.fields().enumerate() {
-                            let field_name = format!("{}", i);
+                            let field_name = format!("{i}");
 
-                            let l_name = format!("l{}", field_name);
+                            let l_name = format!("l{field_name}");
                             l_fields.push(gen_tuple_field(&l_name));
 
-                            let r_name = format!("r{}", field_name);
+                            let r_name = format!("r{field_name}");
                             r_fields.push(gen_tuple_field(&r_name));
 
                             let lhs = make::expr_path(make::ext::ident_path(&l_name));
@@ -548,7 +548,7 @@ fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
             Some(ast::FieldList::TupleFieldList(field_list)) => {
                 let mut expr = None;
                 for (i, _) in field_list.fields().enumerate() {
-                    let idx = format!("{}", i);
+                    let idx = format!("{i}");
                     let lhs = make::expr_path(make::ext::ident_path("self"));
                     let lhs = make::expr_field(lhs, &idx);
                     let rhs = make::expr_path(make::ext::ident_path("other"));
@@ -628,7 +628,7 @@ fn gen_partial_ord(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
             Some(ast::FieldList::TupleFieldList(field_list)) => {
                 let mut exprs = vec![];
                 for (i, _) in field_list.fields().enumerate() {
-                    let idx = format!("{}", i);
+                    let idx = format!("{i}");
                     let lhs = make::expr_path(make::ext::ident_path("self"));
                     let lhs = make::expr_field(lhs, &idx);
                     let rhs = make::expr_path(make::ext::ident_path("other"));
diff --git a/src/tools/rust-analyzer/crates/ide-completion/Cargo.toml b/src/tools/rust-analyzer/crates/ide-completion/Cargo.toml
index 75835bce9..11310e2f1 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/ide-completion/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs b/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs
index e82cbfdcb..7384a3f2d 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs
@@ -157,7 +157,7 @@ fn complete_trait_impl(
                     add_function_impl(acc, ctx, replacement_range, func, hir_impl)
                 }
                 (hir::AssocItem::TypeAlias(type_alias), All | TypeAlias) => {
-                    add_type_alias_impl(acc, ctx, replacement_range, type_alias)
+                    add_type_alias_impl(acc, ctx, replacement_range, type_alias, hir_impl)
                 }
                 (hir::AssocItem::Const(const_), All | Const) => {
                     add_const_impl(acc, ctx, replacement_range, const_, hir_impl)
@@ -236,9 +236,7 @@ fn get_transformed_assoc_item(
     );
 
     transform.apply(assoc_item.syntax());
-    if let ast::AssocItem::Fn(func) = &assoc_item {
-        func.remove_attrs_and_docs();
-    }
+    assoc_item.remove_attrs_and_docs();
     Some(assoc_item)
 }
 
@@ -247,24 +245,50 @@ fn add_type_alias_impl(
     ctx: &CompletionContext<'_>,
     replacement_range: TextRange,
     type_alias: hir::TypeAlias,
+    impl_def: hir::Impl,
 ) {
-    let alias_name = type_alias.name(ctx.db);
-    let (alias_name, escaped_name) =
-        (alias_name.unescaped().to_smol_str(), alias_name.to_smol_str());
+    let alias_name = type_alias.name(ctx.db).unescaped().to_smol_str();
 
     let label = format!("type {} =", alias_name);
-    let replacement = format!("type {} = ", escaped_name);
 
     let mut item = CompletionItem::new(SymbolKind::TypeAlias, replacement_range, label);
     item.lookup_by(format!("type {}", alias_name))
         .set_documentation(type_alias.docs(ctx.db))
         .set_relevance(CompletionRelevance { is_item_from_trait: true, ..Default::default() });
-    match ctx.config.snippet_cap {
-        Some(cap) => item
-            .snippet_edit(cap, TextEdit::replace(replacement_range, format!("{}$0;", replacement))),
-        None => item.text_edit(TextEdit::replace(replacement_range, replacement)),
-    };
-    item.add_to(acc);
+
+    if let Some(source) = ctx.sema.source(type_alias) {
+        let assoc_item = ast::AssocItem::TypeAlias(source.value);
+        if let Some(transformed_item) = get_transformed_assoc_item(ctx, assoc_item, impl_def) {
+            let transformed_ty = match transformed_item {
+                ast::AssocItem::TypeAlias(ty) => ty,
+                _ => unreachable!(),
+            };
+
+            let start = transformed_ty.syntax().text_range().start();
+            let Some(end) = transformed_ty
+                .eq_token()
+                .map(|tok| tok.text_range().start())
+                .or(transformed_ty.semicolon_token().map(|tok| tok.text_range().start())) else { return };
+
+            let len = end - start;
+            let mut decl = transformed_ty.syntax().text().slice(..len).to_string();
+            if !decl.ends_with(' ') {
+                decl.push(' ');
+            }
+            decl.push_str("= ");
+
+            match ctx.config.snippet_cap {
+                Some(cap) => {
+                    let snippet = format!("{}$0;", decl);
+                    item.snippet_edit(cap, TextEdit::replace(replacement_range, snippet));
+                }
+                None => {
+                    item.text_edit(TextEdit::replace(replacement_range, decl));
+                }
+            };
+            item.add_to(acc);
+        }
+    }
 }
 
 fn add_const_impl(
@@ -309,7 +333,6 @@ fn add_const_impl(
 }
 
 fn make_const_compl_syntax(const_: &ast::Const, needs_whitespace: bool) -> String {
-    const_.remove_attrs_and_docs();
     let const_ = if needs_whitespace {
         insert_whitespace_into_node::insert_ws_into(const_.syntax().clone())
     } else {
@@ -333,8 +356,6 @@ fn make_const_compl_syntax(const_: &ast::Const, needs_whitespace: bool) -> Strin
 }
 
 fn function_declaration(node: &ast::Fn, needs_whitespace: bool) -> String {
-    node.remove_attrs_and_docs();
-
     let node = if needs_whitespace {
         insert_whitespace_into_node::insert_ws_into(node.syntax().clone())
     } else {
@@ -350,9 +371,7 @@ fn function_declaration(node: &ast::Fn, needs_whitespace: bool) -> String {
         .map_or(end, |f| f.text_range().start());
 
     let len = end - start;
-    let range = TextRange::new(0.into(), len);
-
-    let syntax = node.text().slice(range).to_string();
+    let syntax = node.text().slice(..len).to_string();
 
     syntax.trim_end().to_owned()
 }
@@ -1163,4 +1182,104 @@ impl Foo for Test {
 "#,
         );
     }
+
+    #[test]
+    fn includes_gat_generics() {
+        check_edit(
+            "type Ty",
+            r#"
+trait Tr<'b> {
+    type Ty<'a: 'b, T: Copy, const C: usize>;
+}
+
+impl<'b> Tr<'b> for () {
+    $0
+}
+"#,
+            r#"
+trait Tr<'b> {
+    type Ty<'a: 'b, T: Copy, const C: usize>;
+}
+
+impl<'b> Tr<'b> for () {
+    type Ty<'a: 'b, T: Copy, const C: usize> = $0;
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn strips_comments() {
+        check_edit(
+            "fn func",
+            r#"
+trait Tr {
+    /// docs
+    #[attr]
+    fn func();
+}
+impl Tr for () {
+    $0
+}
+"#,
+            r#"
+trait Tr {
+    /// docs
+    #[attr]
+    fn func();
+}
+impl Tr for () {
+    fn func() {
+    $0
+}
+}
+"#,
+        );
+        check_edit(
+            "const C",
+            r#"
+trait Tr {
+    /// docs
+    #[attr]
+    const C: usize;
+}
+impl Tr for () {
+    $0
+}
+"#,
+            r#"
+trait Tr {
+    /// docs
+    #[attr]
+    const C: usize;
+}
+impl Tr for () {
+    const C: usize = $0;
+}
+"#,
+        );
+        check_edit(
+            "type Item",
+            r#"
+trait Tr {
+    /// docs
+    #[attr]
+    type Item;
+}
+impl Tr for () {
+    $0
+}
+"#,
+            r#"
+trait Tr {
+    /// docs
+    #[attr]
+    type Item;
+}
+impl Tr for () {
+    type Item = $0;
+}
+"#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs b/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
index 9a891cea2..b9bd47f7d 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
@@ -69,10 +69,6 @@ pub(crate) fn complete_postfix(
         }
     }
 
-    if !ctx.config.snippets.is_empty() {
-        add_custom_postfix_completions(acc, ctx, &postfix_snippet, &receiver_text);
-    }
-
     let try_enum = TryEnum::from_ty(&ctx.sema, &receiver_ty.strip_references());
     if let Some(try_enum) = &try_enum {
         match try_enum {
@@ -140,6 +136,10 @@ pub(crate) fn complete_postfix(
         None => return,
     };
 
+    if !ctx.config.snippets.is_empty() {
+        add_custom_postfix_completions(acc, ctx, &postfix_snippet, &receiver_text);
+    }
+
     match try_enum {
         Some(try_enum) => match try_enum {
             TryEnum::Result => {
@@ -613,4 +613,25 @@ fn main() {
             r#"fn main() { log::error!("{}", 2+2) }"#,
         );
     }
+
+    #[test]
+    fn postfix_custom_snippets_completion_for_references() {
+        check_edit_with_config(
+            CompletionConfig {
+                snippets: vec![Snippet::new(
+                    &[],
+                    &["ok".into()],
+                    &["Ok(${receiver})".into()],
+                    "",
+                    &[],
+                    crate::SnippetScope::Expr,
+                )
+                .unwrap()],
+                ..TEST_CONFIG
+            },
+            "ok",
+            r#"fn main() { &&42.$0 }"#,
+            r#"fn main() { Ok(&&42) }"#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/context/analysis.rs b/src/tools/rust-analyzer/crates/ide-completion/src/context/analysis.rs
index 04111ec7e..c142a7305 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/context/analysis.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/context/analysis.rs
@@ -681,9 +681,13 @@ fn classify_name_ref(
                     ast::Item::ExternBlock(it) => it.extern_item_list().is_none(),
                     ast::Item::Fn(it) => it.body().is_none(),
                     ast::Item::Impl(it) => it.assoc_item_list().is_none(),
-                    ast::Item::Module(it) => it.item_list().is_none(),
+                    ast::Item::Module(it) => {
+                        it.item_list().is_none() && it.semicolon_token().is_none()
+                    }
                     ast::Item::Static(it) => it.body().is_none(),
-                    ast::Item::Struct(it) => it.field_list().is_none(),
+                    ast::Item::Struct(it) => {
+                        it.field_list().is_none() && it.semicolon_token().is_none()
+                    }
                     ast::Item::Trait(it) => it.assoc_item_list().is_none(),
                     ast::Item::TypeAlias(it) => it.ty().is_none(),
                     ast::Item::Union(it) => it.record_field_list().is_none(),
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs b/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs
index 5076c6e86..8ed6cb3cf 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs
@@ -245,3 +245,35 @@ impl Test for () {
         "#]],
     );
 }
+
+#[test]
+fn after_unit_struct() {
+    check(
+        r#"struct S; f$0"#,
+        expect![[r#"
+            ma makro!(…)           macro_rules! makro
+            md module
+            kw const
+            kw crate::
+            kw enum
+            kw extern
+            kw fn
+            kw impl
+            kw mod
+            kw pub
+            kw pub(crate)
+            kw pub(super)
+            kw self::
+            kw static
+            kw struct
+            kw trait
+            kw type
+            kw union
+            kw unsafe
+            kw use
+            sn macro_rules
+            sn tfn (Test function)
+            sn tmod (Test module)
+        "#]],
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/ide-db/Cargo.toml b/src/tools/rust-analyzer/crates/ide-db/Cargo.toml
index cf0bcd5c9..f48cce58c 100644
--- a/src/tools/rust-analyzer/crates/ide-db/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/ide-db/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/line_index.rs b/src/tools/rust-analyzer/crates/ide-db/src/line_index.rs
index 75d49ff2f..1b8f56187 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/line_index.rs
+++ b/src/tools/rust-analyzer/crates/ide-db/src/line_index.rs
@@ -58,8 +58,11 @@ impl LineIndex {
         let mut utf16_lines = NoHashHashMap::default();
         let mut utf16_chars = Vec::new();
 
-        let mut newlines = vec![0.into()];
-        let mut curr_row @ mut curr_col = 0.into();
+        let mut newlines = Vec::with_capacity(16);
+        newlines.push(TextSize::from(0));
+
+        let mut curr_row = 0.into();
+        let mut curr_col = 0.into();
         let mut line = 0;
         for c in text.chars() {
             let c_len = TextSize::of(c);
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/search.rs b/src/tools/rust-analyzer/crates/ide-db/src/search.rs
index 82b85f2fa..aa5d7e9be 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/search.rs
+++ b/src/tools/rust-analyzer/crates/ide-db/src/search.rs
@@ -446,33 +446,47 @@ impl<'a> FindUsages<'a> {
             })
         }
 
-        // FIXME: There should be optimization potential here
-        // Currently we try to descend everything we find which
-        // means we call `Semantics::descend_into_macros` on
-        // every textual hit. That function is notoriously
-        // expensive even for things that do not get down mapped
-        // into macros.
+        let find_nodes = move |name: &str, node: &syntax::SyntaxNode, offset: TextSize| {
+            node.token_at_offset(offset).find(|it| it.text() == name).map(|token| {
+                // FIXME: There should be optimization potential here
+                // Currently we try to descend everything we find which
+                // means we call `Semantics::descend_into_macros` on
+                // every textual hit. That function is notoriously
+                // expensive even for things that do not get down mapped
+                // into macros.
+                sema.descend_into_macros(token).into_iter().filter_map(|it| it.parent())
+            })
+        };
+
         for (text, file_id, search_range) in scope_files(sema, &search_scope) {
             let tree = Lazy::new(move || sema.parse(file_id).syntax().clone());
 
             // Search for occurrences of the items name
             for offset in match_indices(&text, finder, search_range) {
-                for name in sema.find_nodes_at_offset_with_descend(&tree, offset) {
-                    if match name {
-                        ast::NameLike::NameRef(name_ref) => self.found_name_ref(&name_ref, sink),
-                        ast::NameLike::Name(name) => self.found_name(&name, sink),
-                        ast::NameLike::Lifetime(lifetime) => self.found_lifetime(&lifetime, sink),
-                    } {
-                        return;
+                if let Some(iter) = find_nodes(name, &tree, offset) {
+                    for name in iter.filter_map(ast::NameLike::cast) {
+                        if match name {
+                            ast::NameLike::NameRef(name_ref) => {
+                                self.found_name_ref(&name_ref, sink)
+                            }
+                            ast::NameLike::Name(name) => self.found_name(&name, sink),
+                            ast::NameLike::Lifetime(lifetime) => {
+                                self.found_lifetime(&lifetime, sink)
+                            }
+                        } {
+                            return;
+                        }
                     }
                 }
             }
             // Search for occurrences of the `Self` referring to our type
             if let Some((self_ty, finder)) = &include_self_kw_refs {
                 for offset in match_indices(&text, finder, search_range) {
-                    for name_ref in sema.find_nodes_at_offset_with_descend(&tree, offset) {
-                        if self.found_self_ty_name_ref(self_ty, &name_ref, sink) {
-                            return;
+                    if let Some(iter) = find_nodes("Self", &tree, offset) {
+                        for name_ref in iter.filter_map(ast::NameRef::cast) {
+                            if self.found_self_ty_name_ref(self_ty, &name_ref, sink) {
+                                return;
+                            }
                         }
                     }
                 }
@@ -493,17 +507,21 @@ impl<'a> FindUsages<'a> {
                     let tree = Lazy::new(move || sema.parse(file_id).syntax().clone());
 
                     for offset in match_indices(&text, finder, search_range) {
-                        for name_ref in sema.find_nodes_at_offset_with_descend(&tree, offset) {
-                            if self.found_name_ref(&name_ref, sink) {
-                                return;
+                        if let Some(iter) = find_nodes("super", &tree, offset) {
+                            for name_ref in iter.filter_map(ast::NameRef::cast) {
+                                if self.found_name_ref(&name_ref, sink) {
+                                    return;
+                                }
                             }
                         }
                     }
                     if let Some(finder) = &is_crate_root {
                         for offset in match_indices(&text, finder, search_range) {
-                            for name_ref in sema.find_nodes_at_offset_with_descend(&tree, offset) {
-                                if self.found_name_ref(&name_ref, sink) {
-                                    return;
+                            if let Some(iter) = find_nodes("crate", &tree, offset) {
+                                for name_ref in iter.filter_map(ast::NameRef::cast) {
+                                    if self.found_name_ref(&name_ref, sink) {
+                                        return;
+                                    }
                                 }
                             }
                         }
@@ -544,9 +562,11 @@ impl<'a> FindUsages<'a> {
                 let finder = &Finder::new("self");
 
                 for offset in match_indices(&text, finder, search_range) {
-                    for name_ref in sema.find_nodes_at_offset_with_descend(&tree, offset) {
-                        if self.found_self_module_name_ref(&name_ref, sink) {
-                            return;
+                    if let Some(iter) = find_nodes("self", &tree, offset) {
+                        for name_ref in iter.filter_map(ast::NameRef::cast) {
+                            if self.found_self_module_name_ref(&name_ref, sink) {
+                                return;
+                            }
                         }
                     }
                 }
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/syntax_helpers/format_string_exprs.rs b/src/tools/rust-analyzer/crates/ide-db/src/syntax_helpers/format_string_exprs.rs
index ac6c6e8fe..313346ee1 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/syntax_helpers/format_string_exprs.rs
+++ b/src/tools/rust-analyzer/crates/ide-db/src/syntax_helpers/format_string_exprs.rs
@@ -104,6 +104,11 @@ pub fn parse_format_exprs(input: &str) -> Result<(String, Vec<Arg>), ()> {
                 extracted_expressions.push(Arg::Placeholder);
                 state = State::NotArg;
             }
+            (State::MaybeArg, ':') => {
+                output.push(chr);
+                extracted_expressions.push(Arg::Placeholder);
+                state = State::FormatOpts;
+            }
             (State::MaybeArg, _) => {
                 if matches!(chr, '\\' | '$') {
                     current_expr.push('\\');
@@ -118,44 +123,41 @@ pub fn parse_format_exprs(input: &str) -> Result<(String, Vec<Arg>), ()> {
                     state = State::Expr;
                 }
             }
-            (State::Ident | State::Expr, '}') => {
-                if inexpr_open_count == 0 {
-                    output.push(chr);
-
-                    if matches!(state, State::Expr) {
-                        extracted_expressions.push(Arg::Expr(current_expr.trim().into()));
-                    } else {
-                        extracted_expressions.push(Arg::Ident(current_expr.trim().into()));
-                    }
-
-                    current_expr = String::new();
-                    state = State::NotArg;
-                } else {
-                    // We're closing one brace met before inside of the expression.
-                    current_expr.push(chr);
-                    inexpr_open_count -= 1;
-                }
-            }
             (State::Ident | State::Expr, ':') if matches!(chars.peek(), Some(':')) => {
                 // path separator
                 state = State::Expr;
                 current_expr.push_str("::");
                 chars.next();
             }
-            (State::Ident | State::Expr, ':') => {
+            (State::Ident | State::Expr, ':' | '}') => {
                 if inexpr_open_count == 0 {
-                    // We're outside of braces, thus assume that it's a specifier, like "{Some(value):?}"
-                    output.push(chr);
+                    let trimmed = current_expr.trim();
 
-                    if matches!(state, State::Expr) {
-                        extracted_expressions.push(Arg::Expr(current_expr.trim().into()));
+                    // if the expression consists of a single number, like "0" or "12", it can refer to
+                    // format args in the order they are specified.
+                    // see: https://doc.rust-lang.org/std/fmt/#positional-parameters
+                    if trimmed.chars().fold(true, |only_num, c| c.is_ascii_digit() && only_num) {
+                        output.push_str(trimmed);
+                    } else if matches!(state, State::Expr) {
+                        extracted_expressions.push(Arg::Expr(trimmed.into()));
                     } else {
-                        extracted_expressions.push(Arg::Ident(current_expr.trim().into()));
+                        extracted_expressions.push(Arg::Ident(trimmed.into()));
                     }
 
-                    current_expr = String::new();
-                    state = State::FormatOpts;
-                } else {
+                    output.push(chr);
+                    current_expr.clear();
+                    state = if chr == ':' {
+                        State::FormatOpts
+                    } else if chr == '}' {
+                        State::NotArg
+                    } else {
+                        unreachable!()
+                    };
+                } else if chr == '}' {
+                    // We're closing one brace met before inside of the expression.
+                    current_expr.push(chr);
+                    inexpr_open_count -= 1;
+                } else if chr == ':' {
                     // We're inside of braced expression, assume that it's a struct field name/value delimiter.
                     current_expr.push(chr);
                 }
@@ -219,6 +221,10 @@ mod tests {
             ("{expr} is {2 + 2}", expect![["{} is {}; expr, 2 + 2"]]),
             ("{expr:?}", expect![["{:?}; expr"]]),
             ("{expr:1$}", expect![[r"{:1\$}; expr"]]),
+            ("{:1$}", expect![[r"{:1\$}; $1"]]),
+            ("{:>padding$}", expect![[r"{:>padding\$}; $1"]]),
+            ("{}, {}, {0}", expect![[r"{}, {}, {0}; $1, $2"]]),
+            ("{}, {}, {0:b}", expect![[r"{}, {}, {0:b}; $1, $2"]]),
             ("{$0}", expect![[r"{}; \$0"]]),
             ("{malformed", expect![["-"]]),
             ("malformed}", expect![["-"]]),
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/Cargo.toml b/src/tools/rust-analyzer/crates/ide-diagnostics/Cargo.toml
index e1d146f4e..7e9a1125d 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/macro_error.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/macro_error.rs
index 43ff4ed5a..870c78d1f 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/macro_error.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/macro_error.rs
@@ -5,10 +5,7 @@ use crate::{Diagnostic, DiagnosticsContext};
 // This diagnostic is shown for macro expansion errors.
 pub(crate) fn macro_error(ctx: &DiagnosticsContext<'_>, d: &hir::MacroError) -> Diagnostic {
     // Use more accurate position if available.
-    let display_range = d
-        .precise_location
-        .unwrap_or_else(|| ctx.sema.diagnostics_display_range(d.node.clone()).range);
-
+    let display_range = ctx.resolve_precise_location(&d.node, d.precise_location);
     Diagnostic::new("macro-error", d.message.clone(), display_range).experimental()
 }
 
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/no_such_field.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/no_such_field.rs
index a80299106..d8f2a9de9 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/no_such_field.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/no_such_field.rs
@@ -268,12 +268,12 @@ fn main() {
     foo::Foo { bar: 3, $0baz: false};
 }
 //- /foo.rs
-struct Foo {
+pub struct Foo {
     bar: i32
 }
 "#,
             r#"
-struct Foo {
+pub struct Foo {
     bar: i32,
     pub(crate) baz: bool
 }
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_macro_call.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_macro_call.rs
index 4b4312475..87531f4ac 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_macro_call.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_macro_call.rs
@@ -9,10 +9,7 @@ pub(crate) fn unresolved_macro_call(
     d: &hir::UnresolvedMacroCall,
 ) -> Diagnostic {
     // Use more accurate position if available.
-    let display_range = d
-        .precise_location
-        .unwrap_or_else(|| ctx.sema.diagnostics_display_range(d.macro_call.clone()).range);
-
+    let display_range = ctx.resolve_precise_location(&d.macro_call, d.precise_location);
     let bang = if d.is_bang { "!" } else { "" };
     Diagnostic::new(
         "unresolved-macro-call",
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs
index 760f51f90..23818d883 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs
@@ -1,5 +1,4 @@
 use hir::db::DefDatabase;
-use syntax::NodeOrToken;
 
 use crate::{Diagnostic, DiagnosticsContext, Severity};
 
@@ -19,16 +18,7 @@ pub(crate) fn unresolved_proc_macro(
     proc_attr_macros_enabled: bool,
 ) -> Diagnostic {
     // Use more accurate position if available.
-    let display_range = (|| {
-        let precise_location = d.precise_location?;
-        let root = ctx.sema.parse_or_expand(d.node.file_id)?;
-        match root.covering_element(precise_location) {
-            NodeOrToken::Node(it) => Some(ctx.sema.original_range(&it)),
-            NodeOrToken::Token(it) => d.node.with_value(it).original_file_range_opt(ctx.sema.db),
-        }
-    })()
-    .unwrap_or_else(|| ctx.sema.diagnostics_display_range(d.node.clone()))
-    .range;
+    let display_range = ctx.resolve_precise_location(&d.node, d.precise_location);
 
     let config_enabled = match d.kind {
         hir::MacroKind::Attr => proc_macros_enabled && proc_attr_macros_enabled,
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/useless_braces.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/useless_braces.rs
index 8b9330e04..289ed0458 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/useless_braces.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/useless_braces.rs
@@ -71,9 +71,9 @@ use a;
 use a::{c, d::e};
 
 mod a {
-    mod c {}
-    mod d {
-        mod e {}
+    pub mod c {}
+    pub mod d {
+        pub mod e {}
     }
 }
 "#,
@@ -87,9 +87,9 @@ use a::{
 };
 
 mod a {
-    mod c {}
-    mod d {
-        mod e {}
+    pub mod c {}
+    pub mod d {
+        pub mod e {}
     }
 }
 "#,
@@ -116,11 +116,11 @@ use b;
         );
         check_fix(
             r#"
-mod a { mod c {} }
+mod a { pub mod c {} }
 use a::{c$0};
 "#,
             r#"
-mod a { mod c {} }
+mod a { pub mod c {} }
 use a::c;
 "#,
         );
@@ -136,11 +136,11 @@ use a;
         );
         check_fix(
             r#"
-mod a { mod c {} mod d { mod e {} } }
+mod a { pub mod c {} pub mod d { pub mod e {} } }
 use a::{c, d::{e$0}};
 "#,
             r#"
-mod a { mod c {} mod d { mod e {} } }
+mod a { pub mod c {} pub mod d { pub mod e {} } }
 use a::{c, d::e};
 "#,
         );
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs
index ae299f058..d81e36a1f 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs
@@ -182,6 +182,28 @@ struct DiagnosticsContext<'a> {
     resolve: &'a AssistResolveStrategy,
 }
 
+impl<'a> DiagnosticsContext<'a> {
+    fn resolve_precise_location(
+        &self,
+        node: &InFile<SyntaxNodePtr>,
+        precise_location: Option<TextRange>,
+    ) -> TextRange {
+        let sema = &self.sema;
+        (|| {
+            let precise_location = precise_location?;
+            let root = sema.parse_or_expand(node.file_id)?;
+            match root.covering_element(precise_location) {
+                syntax::NodeOrToken::Node(it) => Some(sema.original_range(&it)),
+                syntax::NodeOrToken::Token(it) => {
+                    node.with_value(it).original_file_range_opt(sema.db)
+                }
+            }
+        })()
+        .unwrap_or_else(|| sema.diagnostics_display_range(node.clone()))
+        .range
+    }
+}
+
 pub fn diagnostics(
     db: &RootDatabase,
     config: &DiagnosticsConfig,
diff --git a/src/tools/rust-analyzer/crates/ide-ssr/Cargo.toml b/src/tools/rust-analyzer/crates/ide-ssr/Cargo.toml
index 4baf786c4..7be62a8d9 100644
--- a/src/tools/rust-analyzer/crates/ide-ssr/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/ide-ssr/Cargo.toml
@@ -5,7 +5,7 @@ description = "Structural search and replace of Rust code"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/rust-analyzer"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/ide/Cargo.toml b/src/tools/rust-analyzer/crates/ide/Cargo.toml
index 712459a7e..73f202630 100644
--- a/src/tools/rust-analyzer/crates/ide/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/ide/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs b/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs
index d0be1b3f4..43f7a529b 100644
--- a/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs
@@ -289,10 +289,10 @@ mod b;
 enum E { X(Foo$0) }
 
 //- /a.rs
-struct Foo;
-     //^^^
+pub struct Foo;
+         //^^^
 //- /b.rs
-struct Foo;
+pub struct Foo;
 "#,
         );
     }
@@ -1834,4 +1834,86 @@ fn f() {
 "#,
         );
     }
+
+    #[test]
+    fn goto_bin_op_multiple_impl() {
+        check(
+            r#"
+//- minicore: add
+struct S;
+impl core::ops::Add for S {
+    fn add(
+     //^^^
+    ) {}
+}
+impl core::ops::Add<usize> for S {
+    fn add(
+    ) {}
+}
+
+fn f() {
+    S +$0 S
+}
+"#,
+        );
+
+        check(
+            r#"
+//- minicore: add
+struct S;
+impl core::ops::Add for S {
+    fn add(
+    ) {}
+}
+impl core::ops::Add<usize> for S {
+    fn add(
+     //^^^
+    ) {}
+}
+
+fn f() {
+    S +$0 0usize
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn path_call_multiple_trait_impl() {
+        check(
+            r#"
+trait Trait<T> {
+    fn f(_: T);
+}
+impl Trait<i32> for usize {
+    fn f(_: i32) {}
+     //^
+}
+impl Trait<i64> for usize {
+    fn f(_: i64) {}
+}
+fn main() {
+    usize::f$0(0i32);
+}
+"#,
+        );
+
+        check(
+            r#"
+trait Trait<T> {
+    fn f(_: T);
+}
+impl Trait<i32> for usize {
+    fn f(_: i32) {}
+}
+impl Trait<i64> for usize {
+    fn f(_: i64) {}
+     //^
+}
+fn main() {
+    usize::f$0(0i64);
+}
+"#,
+        )
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide/src/hover.rs b/src/tools/rust-analyzer/crates/ide/src/hover.rs
index 3687b597f..838fb18c3 100644
--- a/src/tools/rust-analyzer/crates/ide/src/hover.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/hover.rs
@@ -119,7 +119,14 @@ pub(crate) fn hover(
         });
     }
 
-    let in_attr = matches!(original_token.parent().and_then(ast::TokenTree::cast), Some(tt) if tt.syntax().ancestors().any(|it| ast::Meta::can_cast(it.kind())));
+    let in_attr = original_token
+        .parent_ancestors()
+        .filter_map(ast::Item::cast)
+        .any(|item| sema.is_attr_macro_call(&item))
+        && !matches!(
+            original_token.parent().and_then(ast::TokenTree::cast),
+            Some(tt) if tt.syntax().ancestors().any(|it| ast::Meta::can_cast(it.kind()))
+        );
     // prefer descending the same token kind in attribute expansions, in normal macros text
     // equivalency is more important
     let descended = if in_attr {
diff --git a/src/tools/rust-analyzer/crates/ide/src/inlay_hints.rs b/src/tools/rust-analyzer/crates/ide/src/inlay_hints.rs
index 34d8bf67a..37384c4e7 100644
--- a/src/tools/rust-analyzer/crates/ide/src/inlay_hints.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/inlay_hints.rs
@@ -1,7 +1,10 @@
 use std::fmt;
 
 use either::Either;
-use hir::{known, Callable, HasVisibility, HirDisplay, Mutability, Semantics, TypeInfo};
+use hir::{
+    known, Adjust, AutoBorrow, Callable, HasVisibility, HirDisplay, Mutability, OverloadedDeref,
+    PointerCast, Safety, Semantics, TypeInfo,
+};
 use ide_db::{
     base_db::FileRange, famous_defs::FamousDefs, syntax_helpers::node_ext::walk_ty, FxHashMap,
     RootDatabase,
@@ -22,7 +25,7 @@ pub struct InlayHintsConfig {
     pub type_hints: bool,
     pub parameter_hints: bool,
     pub chaining_hints: bool,
-    pub reborrow_hints: ReborrowHints,
+    pub adjustment_hints: AdjustmentHints,
     pub closure_return_type_hints: ClosureReturnTypeHints,
     pub binding_mode_hints: bool,
     pub lifetime_elision_hints: LifetimeElisionHints,
@@ -48,9 +51,9 @@ pub enum LifetimeElisionHints {
 }
 
 #[derive(Clone, Debug, PartialEq, Eq)]
-pub enum ReborrowHints {
+pub enum AdjustmentHints {
     Always,
-    MutableOnly,
+    ReborrowOnly,
     Never,
 }
 
@@ -61,7 +64,8 @@ pub enum InlayKind {
     ClosingBraceHint,
     ClosureReturnTypeHint,
     GenericParamListHint,
-    ImplicitReborrowHint,
+    AdjustmentHint,
+    AdjustmentHintClosingParenthesis,
     LifetimeHint,
     ParameterHint,
     TypeHint,
@@ -115,6 +119,12 @@ impl From<String> for InlayHintLabel {
     }
 }
 
+impl From<&str> for InlayHintLabel {
+    fn from(s: &str) -> Self {
+        Self { parts: vec![InlayHintLabelPart { text: s.into(), linked_location: None }] }
+    }
+}
+
 impl fmt::Display for InlayHintLabel {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "{}", self.parts.iter().map(|part| &part.text).format(""))
@@ -180,7 +190,7 @@ impl fmt::Debug for InlayHintLabelPart {
 pub(crate) fn inlay_hints(
     db: &RootDatabase,
     file_id: FileId,
-    range_limit: Option<FileRange>,
+    range_limit: Option<TextRange>,
     config: &InlayHintsConfig,
 ) -> Vec<InlayHint> {
     let _p = profile::span("inlay_hints");
@@ -195,7 +205,7 @@ pub(crate) fn inlay_hints(
 
         let hints = |node| hints(&mut acc, &famous_defs, config, file_id, node);
         match range_limit {
-            Some(FileRange { range, .. }) => match file.covering_element(range) {
+            Some(range) => match file.covering_element(range) {
                 NodeOrToken::Token(_) => return acc,
                 NodeOrToken::Node(n) => n
                     .descendants()
@@ -221,6 +231,7 @@ fn hints(
         match node {
             ast::Expr(expr) => {
                 chaining_hints(hints, sema, &famous_defs, config, file_id, &expr);
+                adjustment_hints(hints, sema, config, &expr);
                 match expr {
                     ast::Expr::CallExpr(it) => param_name_hints(hints, sema, config, ast::Expr::from(it)),
                     ast::Expr::MethodCallExpr(it) => {
@@ -229,7 +240,7 @@ fn hints(
                     ast::Expr::ClosureExpr(it) => closure_ret_hints(hints, sema, &famous_defs, config, file_id, it),
                     // We could show reborrows for all expressions, but usually that is just noise to the user
                     // and the main point here is to show why "moving" a mutable reference doesn't necessarily move it
-                    ast::Expr::PathExpr(_) => reborrow_hints(hints, sema, config, &expr),
+                    // ast::Expr::PathExpr(_) => reborrow_hints(hints, sema, config, &expr),
                     _ => None,
                 }
             },
@@ -617,30 +628,95 @@ fn closure_ret_hints(
     Some(())
 }
 
-fn reborrow_hints(
+fn adjustment_hints(
     acc: &mut Vec<InlayHint>,
     sema: &Semantics<'_, RootDatabase>,
     config: &InlayHintsConfig,
     expr: &ast::Expr,
 ) -> Option<()> {
-    if config.reborrow_hints == ReborrowHints::Never {
+    if config.adjustment_hints == AdjustmentHints::Never {
+        return None;
+    }
+
+    if let ast::Expr::ParenExpr(_) = expr {
+        // These inherit from the inner expression which would result in duplicate hints
         return None;
     }
 
+    let parent = expr.syntax().parent().and_then(ast::Expr::cast);
     let descended = sema.descend_node_into_attributes(expr.clone()).pop();
     let desc_expr = descended.as_ref().unwrap_or(expr);
-    let mutability = sema.is_implicit_reborrow(desc_expr)?;
-    let label = match mutability {
-        hir::Mutability::Shared if config.reborrow_hints != ReborrowHints::MutableOnly => "&*",
-        hir::Mutability::Mut => "&mut *",
-        _ => return None,
+    let adjustments = sema.expr_adjustments(desc_expr).filter(|it| !it.is_empty())?;
+    let needs_parens = match parent {
+        Some(parent) => {
+            match parent {
+                ast::Expr::AwaitExpr(_)
+                | ast::Expr::CallExpr(_)
+                | ast::Expr::CastExpr(_)
+                | ast::Expr::FieldExpr(_)
+                | ast::Expr::MethodCallExpr(_)
+                | ast::Expr::TryExpr(_) => true,
+                // FIXME: shorthands need special casing, though not sure if adjustments are even valid there
+                ast::Expr::RecordExpr(_) => false,
+                ast::Expr::IndexExpr(index) => index.base().as_ref() == Some(expr),
+                _ => false,
+            }
+        }
+        None => false,
     };
-    acc.push(InlayHint {
-        range: expr.syntax().text_range(),
-        kind: InlayKind::ImplicitReborrowHint,
-        label: label.to_string().into(),
-        tooltip: Some(InlayTooltip::String("Compiler inserted reborrow".into())),
-    });
+    if needs_parens {
+        acc.push(InlayHint {
+            range: expr.syntax().text_range(),
+            kind: InlayKind::AdjustmentHint,
+            label: "(".into(),
+            tooltip: None,
+        });
+    }
+    for adjustment in adjustments.into_iter().rev() {
+        // FIXME: Add some nicer tooltips to each of these
+        let text = match adjustment {
+            Adjust::NeverToAny if config.adjustment_hints == AdjustmentHints::Always => {
+                "<never-to-any>"
+            }
+            Adjust::Deref(None) => "*",
+            Adjust::Deref(Some(OverloadedDeref(Mutability::Mut))) => "*",
+            Adjust::Deref(Some(OverloadedDeref(Mutability::Shared))) => "*",
+            Adjust::Borrow(AutoBorrow::Ref(Mutability::Shared)) => "&",
+            Adjust::Borrow(AutoBorrow::Ref(Mutability::Mut)) => "&mut ",
+            Adjust::Borrow(AutoBorrow::RawPtr(Mutability::Shared)) => "&raw const ",
+            Adjust::Borrow(AutoBorrow::RawPtr(Mutability::Mut)) => "&raw mut ",
+            // some of these could be represented via `as` casts, but that's not too nice and
+            // handling everything as a prefix expr makes the `(` and `)` insertion easier
+            Adjust::Pointer(cast) if config.adjustment_hints == AdjustmentHints::Always => {
+                match cast {
+                    PointerCast::ReifyFnPointer => "<fn-item-to-fn-pointer>",
+                    PointerCast::UnsafeFnPointer => "<safe-fn-pointer-to-unsafe-fn-pointer>",
+                    PointerCast::ClosureFnPointer(Safety::Unsafe) => {
+                        "<closure-to-unsafe-fn-pointer>"
+                    }
+                    PointerCast::ClosureFnPointer(Safety::Safe) => "<closure-to-fn-pointer>",
+                    PointerCast::MutToConstPointer => "<mut-ptr-to-const-ptr>",
+                    PointerCast::ArrayToPointer => "<array-ptr-to-element-ptr>",
+                    PointerCast::Unsize => "<unsize>",
+                }
+            }
+            _ => continue,
+        };
+        acc.push(InlayHint {
+            range: expr.syntax().text_range(),
+            kind: InlayKind::AdjustmentHint,
+            label: text.into(),
+            tooltip: None,
+        });
+    }
+    if needs_parens {
+        acc.push(InlayHint {
+            range: expr.syntax().text_range(),
+            kind: InlayKind::AdjustmentHintClosingParenthesis,
+            label: ")".into(),
+            tooltip: None,
+        });
+    }
     Some(())
 }
 
@@ -1213,12 +1289,11 @@ fn get_callable(
 #[cfg(test)]
 mod tests {
     use expect_test::{expect, Expect};
-    use ide_db::base_db::FileRange;
     use itertools::Itertools;
     use syntax::{TextRange, TextSize};
     use test_utils::extract_annotations;
 
-    use crate::inlay_hints::ReborrowHints;
+    use crate::inlay_hints::AdjustmentHints;
     use crate::{fixture, inlay_hints::InlayHintsConfig, LifetimeElisionHints};
 
     use super::ClosureReturnTypeHints;
@@ -1230,7 +1305,7 @@ mod tests {
         chaining_hints: false,
         lifetime_elision_hints: LifetimeElisionHints::Never,
         closure_return_type_hints: ClosureReturnTypeHints::Never,
-        reborrow_hints: ReborrowHints::Always,
+        adjustment_hints: AdjustmentHints::Never,
         binding_mode_hints: false,
         hide_named_constructor_hints: false,
         hide_closure_initialization_hints: false,
@@ -1242,7 +1317,6 @@ mod tests {
         type_hints: true,
         parameter_hints: true,
         chaining_hints: true,
-        reborrow_hints: ReborrowHints::Always,
         closure_return_type_hints: ClosureReturnTypeHints::WithBlock,
         binding_mode_hints: true,
         lifetime_elision_hints: LifetimeElisionHints::Always,
@@ -1838,10 +1912,7 @@ fn main() {
             .inlay_hints(
                 &InlayHintsConfig { type_hints: true, ..DISABLED_CONFIG },
                 file_id,
-                Some(FileRange {
-                    file_id,
-                    range: TextRange::new(TextSize::from(500), TextSize::from(600)),
-                }),
+                Some(TextRange::new(TextSize::from(500), TextSize::from(600))),
             )
             .unwrap();
         let actual =
@@ -2846,48 +2917,6 @@ impl () {
     }
 
     #[test]
-    fn hints_implicit_reborrow() {
-        check_with_config(
-            InlayHintsConfig {
-                reborrow_hints: ReborrowHints::Always,
-                parameter_hints: true,
-                ..DISABLED_CONFIG
-            },
-            r#"
-fn __() {
-    let unique = &mut ();
-    let r_mov = unique;
-    let foo: &mut _ = unique;
-                    //^^^^^^ &mut *
-    ref_mut_id(unique);
-             //^^^^^^ mut_ref
-             //^^^^^^ &mut *
-    let shared = ref_id(unique);
-                      //^^^^^^ shared_ref
-                      //^^^^^^ &*
-    let mov = shared;
-    let r_mov: &_ = shared;
-    ref_id(shared);
-         //^^^^^^ shared_ref
-
-    identity(unique);
-    identity(shared);
-}
-fn identity<T>(t: T) -> T {
-    t
-}
-fn ref_mut_id(mut_ref: &mut ()) -> &mut () {
-    mut_ref
-  //^^^^^^^ &mut *
-}
-fn ref_id(shared_ref: &()) -> &() {
-    shared_ref
-}
-"#,
-        );
-    }
-
-    #[test]
     fn hints_binding_modes() {
         check_with_config(
             InlayHintsConfig { binding_mode_hints: true, ..DISABLED_CONFIG },
@@ -2994,4 +3023,76 @@ fn f() {
 "#,
         );
     }
+
+    #[test]
+    fn adjustment_hints() {
+        check_with_config(
+            InlayHintsConfig { adjustment_hints: AdjustmentHints::Always, ..DISABLED_CONFIG },
+            r#"
+//- minicore: coerce_unsized
+fn main() {
+    let _: u32         = loop {};
+                       //^^^^^^^<never-to-any>
+    let _: &u32        = &mut 0;
+                       //^^^^^^&
+                       //^^^^^^*
+    let _: &mut u32    = &mut 0;
+                       //^^^^^^&mut $
+                       //^^^^^^*
+    let _: *const u32  = &mut 0;
+                       //^^^^^^&raw const $
+                       //^^^^^^*
+    let _: *mut u32    = &mut 0;
+                       //^^^^^^&raw mut $
+                       //^^^^^^*
+    let _: fn()        = main;
+                       //^^^^<fn-item-to-fn-pointer>
+    let _: unsafe fn() = main;
+                       //^^^^<safe-fn-pointer-to-unsafe-fn-pointer>
+                       //^^^^<fn-item-to-fn-pointer>
+    let _: unsafe fn() = main as fn();
+                       //^^^^^^^^^^^^<safe-fn-pointer-to-unsafe-fn-pointer>
+    let _: fn()        = || {};
+                       //^^^^^<closure-to-fn-pointer>
+    let _: unsafe fn() = || {};
+                       //^^^^^<closure-to-unsafe-fn-pointer>
+    let _: *const u32  = &mut 0u32 as *mut u32;
+                       //^^^^^^^^^^^^^^^^^^^^^<mut-ptr-to-const-ptr>
+    let _: &mut [_]    = &mut [0; 0];
+                       //^^^^^^^^^^^<unsize>
+                       //^^^^^^^^^^^&mut $
+                       //^^^^^^^^^^^*
+
+    Struct.consume();
+    Struct.by_ref();
+  //^^^^^^(
+  //^^^^^^&
+  //^^^^^^)
+    Struct.by_ref_mut();
+  //^^^^^^(
+  //^^^^^^&mut $
+  //^^^^^^)
+
+    (&Struct).consume();
+   //^^^^^^^*
+    (&Struct).by_ref();
+
+    (&mut Struct).consume();
+   //^^^^^^^^^^^*
+    (&mut Struct).by_ref();
+   //^^^^^^^^^^^&
+   //^^^^^^^^^^^*
+    (&mut Struct).by_ref_mut();
+}
+
+#[derive(Copy, Clone)]
+struct Struct;
+impl Struct {
+    fn consume(self) {}
+    fn by_ref(&self) {}
+    fn by_ref_mut(&mut self) {}
+}
+"#,
+        )
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide/src/lib.rs b/src/tools/rust-analyzer/crates/ide/src/lib.rs
index 416817ca0..7402e86f3 100644
--- a/src/tools/rust-analyzer/crates/ide/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/lib.rs
@@ -81,8 +81,8 @@ pub use crate::{
     highlight_related::{HighlightRelatedConfig, HighlightedRange},
     hover::{HoverAction, HoverConfig, HoverDocFormat, HoverGotoTypeData, HoverResult},
     inlay_hints::{
-        ClosureReturnTypeHints, InlayHint, InlayHintLabel, InlayHintsConfig, InlayKind,
-        InlayTooltip, LifetimeElisionHints, ReborrowHints,
+        AdjustmentHints, ClosureReturnTypeHints, InlayHint, InlayHintLabel, InlayHintsConfig,
+        InlayKind, InlayTooltip, LifetimeElisionHints,
     },
     join_lines::JoinLinesConfig,
     markup::Markup,
@@ -367,7 +367,7 @@ impl Analysis {
         &self,
         config: &InlayHintsConfig,
         file_id: FileId,
-        range: Option<FileRange>,
+        range: Option<TextRange>,
     ) -> Cancellable<Vec<InlayHint>> {
         self.with_db(|db| inlay_hints::inlay_hints(db, file_id, range, config))
     }
diff --git a/src/tools/rust-analyzer/crates/ide/src/moniker.rs b/src/tools/rust-analyzer/crates/ide/src/moniker.rs
index 852a8fd83..fcbf6d8e5 100644
--- a/src/tools/rust-analyzer/crates/ide/src/moniker.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/moniker.rs
@@ -1,9 +1,9 @@
 //! This module generates [moniker](https://microsoft.github.io/language-server-protocol/specifications/lsif/0.6.0/specification/#exportsImports)
 //! for LSIF and LSP.
 
-use hir::{db::DefDatabase, AsAssocItem, AssocItemContainer, Crate, Name, Semantics};
+use hir::{AsAssocItem, AssocItemContainer, Crate, Name, Semantics};
 use ide_db::{
-    base_db::{CrateOrigin, FileId, FileLoader, FilePosition, LangCrateOrigin},
+    base_db::{CrateOrigin, FilePosition, LangCrateOrigin},
     defs::{Definition, IdentClass},
     helpers::pick_best_token,
     RootDatabase,
@@ -11,7 +11,7 @@ use ide_db::{
 use itertools::Itertools;
 use syntax::{AstNode, SyntaxKind::*, T};
 
-use crate::{doc_links::token_as_doc_comment, RangeInfo};
+use crate::{doc_links::token_as_doc_comment, parent_module::crates_for, RangeInfo};
 
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum MonikerDescriptorKind {
@@ -73,20 +73,8 @@ impl MonikerResult {
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct PackageInformation {
     pub name: String,
-    pub repo: String,
-    pub version: String,
-}
-
-pub(crate) fn crate_for_file(db: &RootDatabase, file_id: FileId) -> Option<Crate> {
-    for &krate in db.relevant_crates(file_id).iter() {
-        let crate_def_map = db.crate_def_map(krate);
-        for (_, data) in crate_def_map.modules() {
-            if data.origin.file_id() == Some(file_id) {
-                return Some(krate.into());
-            }
-        }
-    }
-    None
+    pub repo: Option<String>,
+    pub version: Option<String>,
 }
 
 pub(crate) fn moniker(
@@ -95,7 +83,7 @@ pub(crate) fn moniker(
 ) -> Option<RangeInfo<Vec<MonikerResult>>> {
     let sema = &Semantics::new(db);
     let file = sema.parse(file_id).syntax().clone();
-    let current_crate = crate_for_file(db, file_id)?;
+    let current_crate: hir::Crate = crates_for(db, file_id).pop()?.into();
     let original_token = pick_best_token(file.token_at_offset(offset), |kind| match kind {
         IDENT
         | INT_NUMBER
@@ -256,18 +244,18 @@ pub(crate) fn def_to_moniker(
             let (name, repo, version) = match krate.origin(db) {
                 CrateOrigin::CratesIo { repo, name } => (
                     name.unwrap_or(krate.display_name(db)?.canonical_name().to_string()),
-                    repo?,
-                    krate.version(db)?,
+                    repo,
+                    krate.version(db),
                 ),
                 CrateOrigin::Lang(lang) => (
                     krate.display_name(db)?.canonical_name().to_string(),
-                    "https://github.com/rust-lang/rust/".to_string(),
-                    match lang {
+                    Some("https://github.com/rust-lang/rust/".to_string()),
+                    Some(match lang {
                         LangCrateOrigin::Other => {
                             "https://github.com/rust-lang/rust/library/".into()
                         }
                         lang => format!("https://github.com/rust-lang/rust/library/{lang}",),
-                    },
+                    }),
                 ),
             };
             PackageInformation { name, repo, version }
@@ -315,7 +303,7 @@ pub mod module {
 }
 "#,
             "foo::module::func",
-            r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
+            r#"PackageInformation { name: "foo", repo: Some("https://a.b/foo.git"), version: Some("0.1.0") }"#,
             MonikerKind::Import,
         );
         check_moniker(
@@ -331,7 +319,7 @@ pub mod module {
 }
 "#,
             "foo::module::func",
-            r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
+            r#"PackageInformation { name: "foo", repo: Some("https://a.b/foo.git"), version: Some("0.1.0") }"#,
             MonikerKind::Export,
         );
     }
@@ -348,7 +336,7 @@ pub mod module {
 }
 "#,
             "foo::module::MyTrait::func",
-            r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
+            r#"PackageInformation { name: "foo", repo: Some("https://a.b/foo.git"), version: Some("0.1.0") }"#,
             MonikerKind::Export,
         );
     }
@@ -365,7 +353,7 @@ pub mod module {
 }
 "#,
             "foo::module::MyTrait::MY_CONST",
-            r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
+            r#"PackageInformation { name: "foo", repo: Some("https://a.b/foo.git"), version: Some("0.1.0") }"#,
             MonikerKind::Export,
         );
     }
@@ -382,7 +370,7 @@ pub mod module {
 }
 "#,
             "foo::module::MyTrait::MyType",
-            r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
+            r#"PackageInformation { name: "foo", repo: Some("https://a.b/foo.git"), version: Some("0.1.0") }"#,
             MonikerKind::Export,
         );
     }
@@ -405,7 +393,7 @@ pub mod module {
 }
 "#,
             "foo::module::MyStruct::MyTrait::func",
-            r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
+            r#"PackageInformation { name: "foo", repo: Some("https://a.b/foo.git"), version: Some("0.1.0") }"#,
             MonikerKind::Export,
         );
     }
@@ -425,7 +413,7 @@ pub struct St {
 }
 "#,
             "foo::St::a",
-            r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
+            r#"PackageInformation { name: "foo", repo: Some("https://a.b/foo.git"), version: Some("0.1.0") }"#,
             MonikerKind::Import,
         );
     }
diff --git a/src/tools/rust-analyzer/crates/ide/src/references.rs b/src/tools/rust-analyzer/crates/ide/src/references.rs
index e942413c1..0f758cfa2 100644
--- a/src/tools/rust-analyzer/crates/ide/src/references.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/references.rs
@@ -16,6 +16,7 @@ use ide_db::{
     search::{ReferenceCategory, SearchScope, UsageSearchResult},
     RootDatabase,
 };
+use itertools::Itertools;
 use stdx::hash::NoHashHashMap;
 use syntax::{
     algo::find_node_at_offset,
@@ -86,6 +87,7 @@ pub(crate) fn find_all_refs(
                         file_id,
                         refs.into_iter()
                             .map(|file_ref| (file_ref.range, file_ref.category))
+                            .unique()
                             .collect(),
                     )
                 })
diff --git a/src/tools/rust-analyzer/crates/ide/src/rename.rs b/src/tools/rust-analyzer/crates/ide/src/rename.rs
index fe44856dc..b4df04370 100644
--- a/src/tools/rust-analyzer/crates/ide/src/rename.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/rename.rs
@@ -40,7 +40,9 @@ pub(crate) fn prepare_rename(
             if def.range_for_rename(&sema).is_none() {
                 bail!("No references found at position")
             }
-            let frange = sema.original_range(name_like.syntax());
+            let Some(frange) = sema.original_range_opt(name_like.syntax()) else {
+                bail!("No references found at position");
+            };
 
             always!(
                 frange.range.contains_inclusive(position.offset)
@@ -51,7 +53,7 @@ pub(crate) fn prepare_rename(
         .reduce(|acc, cur| match (acc, cur) {
             // ensure all ranges are the same
             (Ok(acc_inner), Ok(cur_inner)) if acc_inner == cur_inner => Ok(acc_inner),
-            (Err(e), _) => Err(e),
+            (e @ Err(_), _) | (_, e @ Err(_)) => e,
             _ => bail!("inconsistent text range"),
         });
 
@@ -2249,4 +2251,33 @@ fn foo((bar | bar | bar): ()) {
 "#,
         );
     }
+
+    #[test]
+    fn regression_13498() {
+        check(
+            "Testing",
+            r"
+mod foo {
+    pub struct Test$0;
+}
+
+use foo::Test as Tester;
+
+fn main() {
+    let t = Tester;
+}
+",
+            r"
+mod foo {
+    pub struct Testing;
+}
+
+use foo::Testing as Tester;
+
+fn main() {
+    let t = Tester;
+}
+",
+        )
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide/src/signature_help.rs b/src/tools/rust-analyzer/crates/ide/src/signature_help.rs
index fedc1a435..e7412d27f 100644
--- a/src/tools/rust-analyzer/crates/ide/src/signature_help.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/signature_help.rs
@@ -149,7 +149,7 @@ fn signature_help_for_call(
                 variant.name(db)
             );
         }
-        hir::CallableKind::Closure | hir::CallableKind::FnPtr => (),
+        hir::CallableKind::Closure | hir::CallableKind::FnPtr | hir::CallableKind::Other => (),
     }
 
     res.signature.push('(');
@@ -189,9 +189,10 @@ fn signature_help_for_call(
         hir::CallableKind::Function(func) if callable.return_type().contains_unknown() => {
             render(func.ret_type(db))
         }
-        hir::CallableKind::Function(_) | hir::CallableKind::Closure | hir::CallableKind::FnPtr => {
-            render(callable.return_type())
-        }
+        hir::CallableKind::Function(_)
+        | hir::CallableKind::Closure
+        | hir::CallableKind::FnPtr
+        | hir::CallableKind::Other => render(callable.return_type()),
         hir::CallableKind::TupleStruct(_) | hir::CallableKind::TupleEnumVariant(_) => {}
     }
     Some(res)
@@ -387,10 +388,9 @@ mod tests {
     }
 
     fn check(ra_fixture: &str, expect: Expect) {
-        // Implicitly add `Sized` to avoid noisy `T: ?Sized` in the results.
         let fixture = format!(
             r#"
-#[lang = "sized"] trait Sized {{}}
+//- minicore: sized, fn
 {ra_fixture}
             "#
         );
@@ -1331,4 +1331,50 @@ fn f() {
             "#]],
         );
     }
+
+    #[test]
+    fn help_for_generic_call() {
+        check(
+            r#"
+fn f<F: FnOnce(u8, u16) -> i32>(f: F) {
+    f($0)
+}
+"#,
+            expect![[r#"
+                (u8, u16) -> i32
+                 ^^  ---
+            "#]],
+        );
+        check(
+            r#"
+fn f<T, F: FnOnce(&T, u16) -> &T>(f: F) {
+    f($0)
+}
+"#,
+            expect![[r#"
+                (&T, u16) -> &T
+                 ^^  ---
+            "#]],
+        );
+    }
+
+    #[test]
+    fn regression_13579() {
+        check(
+            r#"
+fn f() {
+    take(2)($0);
+}
+
+fn take<C, Error>(
+    count: C
+) -> impl Fn() -> C  {
+    move || count
+}
+"#,
+            expect![[r#"
+                () -> i32
+            "#]],
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide/src/static_index.rs b/src/tools/rust-analyzer/crates/ide/src/static_index.rs
index 27ad1a948..2380cf738 100644
--- a/src/tools/rust-analyzer/crates/ide/src/static_index.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/static_index.rs
@@ -13,7 +13,8 @@ use syntax::{AstNode, SyntaxKind::*, SyntaxToken, TextRange, T};
 
 use crate::{
     hover::hover_for_definition,
-    moniker::{crate_for_file, def_to_moniker, MonikerResult},
+    moniker::{def_to_moniker, MonikerResult},
+    parent_module::crates_for,
     Analysis, Fold, HoverConfig, HoverDocFormat, HoverResult, InlayHint, InlayHintsConfig,
     TryToNav,
 };
@@ -99,7 +100,7 @@ fn all_modules(db: &dyn HirDatabase) -> Vec<Module> {
 
 impl StaticIndex<'_> {
     fn add_file(&mut self, file_id: FileId) {
-        let current_crate = crate_for_file(self.db, file_id);
+        let current_crate = crates_for(self.db, file_id).pop().map(Into::into);
         let folds = self.analysis.folding_ranges(file_id).unwrap();
         let inlay_hints = self
             .analysis
@@ -111,7 +112,7 @@ impl StaticIndex<'_> {
                     chaining_hints: true,
                     closure_return_type_hints: crate::ClosureReturnTypeHints::WithBlock,
                     lifetime_elision_hints: crate::LifetimeElisionHints::Never,
-                    reborrow_hints: crate::ReborrowHints::Never,
+                    adjustment_hints: crate::AdjustmentHints::Never,
                     hide_named_constructor_hints: false,
                     hide_closure_initialization_hints: false,
                     param_names_for_lifetime_elision_hints: false,
diff --git a/src/tools/rust-analyzer/crates/limit/Cargo.toml b/src/tools/rust-analyzer/crates/limit/Cargo.toml
index 893db436d..3536f73da 100644
--- a/src/tools/rust-analyzer/crates/limit/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/limit/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [features]
 tracking = []
diff --git a/src/tools/rust-analyzer/crates/mbe/Cargo.toml b/src/tools/rust-analyzer/crates/mbe/Cargo.toml
index 13cd89010..bce2fc9a7 100644
--- a/src/tools/rust-analyzer/crates/mbe/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/mbe/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/mbe/src/syntax_bridge.rs b/src/tools/rust-analyzer/crates/mbe/src/syntax_bridge.rs
index e4c56565b..cf53c1672 100644
--- a/src/tools/rust-analyzer/crates/mbe/src/syntax_bridge.rs
+++ b/src/tools/rust-analyzer/crates/mbe/src/syntax_bridge.rs
@@ -12,6 +12,9 @@ use tt::buffer::{Cursor, TokenBuffer};
 
 use crate::{to_parser_input::to_parser_input, tt_iter::TtIter, TokenMap};
 
+#[cfg(test)]
+mod tests;
+
 /// Convert the syntax node to a `TokenTree` (what macro
 /// will consume).
 pub fn syntax_node_to_token_tree(node: &SyntaxNode) -> (tt::Subtree, TokenMap) {
@@ -35,7 +38,7 @@ pub fn syntax_node_to_token_tree_with_modifications(
     append: FxHashMap<SyntaxElement, Vec<SyntheticToken>>,
 ) -> (tt::Subtree, TokenMap, u32) {
     let global_offset = node.text_range().start();
-    let mut c = Convertor::new(node, global_offset, existing_token_map, next_id, replace, append);
+    let mut c = Converter::new(node, global_offset, existing_token_map, next_id, replace, append);
     let subtree = convert_tokens(&mut c);
     c.id_alloc.map.shrink_to_fit();
     always!(c.replace.is_empty(), "replace: {:?}", c.replace);
@@ -100,7 +103,7 @@ pub fn parse_to_token_tree(text: &str) -> Option<(tt::Subtree, TokenMap)> {
         return None;
     }
 
-    let mut conv = RawConvertor {
+    let mut conv = RawConverter {
         lexed,
         pos: 0,
         id_alloc: TokenIdAlloc {
@@ -148,7 +151,7 @@ pub fn parse_exprs_with_sep(tt: &tt::Subtree, sep: char) -> Vec<tt::Subtree> {
     res
 }
 
-fn convert_tokens<C: TokenConvertor>(conv: &mut C) -> tt::Subtree {
+fn convert_tokens<C: TokenConverter>(conv: &mut C) -> tt::Subtree {
     struct StackEntry {
         subtree: tt::Subtree,
         idx: usize,
@@ -228,7 +231,7 @@ fn convert_tokens<C: TokenConvertor>(conv: &mut C) -> tt::Subtree {
             }
 
             let spacing = match conv.peek().map(|next| next.kind(conv)) {
-                Some(kind) if !kind.is_trivia() => tt::Spacing::Joint,
+                Some(kind) if is_single_token_op(kind) => tt::Spacing::Joint,
                 _ => tt::Spacing::Alone,
             };
             let char = match token.to_char(conv) {
@@ -307,6 +310,35 @@ fn convert_tokens<C: TokenConvertor>(conv: &mut C) -> tt::Subtree {
     }
 }
 
+fn is_single_token_op(kind: SyntaxKind) -> bool {
+    matches!(
+        kind,
+        EQ | L_ANGLE
+            | R_ANGLE
+            | BANG
+            | AMP
+            | PIPE
+            | TILDE
+            | AT
+            | DOT
+            | COMMA
+            | SEMICOLON
+            | COLON
+            | POUND
+            | DOLLAR
+            | QUESTION
+            | PLUS
+            | MINUS
+            | STAR
+            | SLASH
+            | PERCENT
+            | CARET
+            // LIFETIME_IDENT will be split into a sequence of `'` (a single quote) and an
+            // identifier.
+            | LIFETIME_IDENT
+    )
+}
+
 /// Returns the textual content of a doc comment block as a quoted string
 /// That is, strips leading `///` (or `/**`, etc)
 /// and strips the ending `*/`
@@ -425,8 +457,8 @@ impl TokenIdAlloc {
     }
 }
 
-/// A raw token (straight from lexer) convertor
-struct RawConvertor<'a> {
+/// A raw token (straight from lexer) converter
+struct RawConverter<'a> {
     lexed: parser::LexedStr<'a>,
     pos: usize,
     id_alloc: TokenIdAlloc,
@@ -442,7 +474,7 @@ trait SrcToken<Ctx>: std::fmt::Debug {
     fn synthetic_id(&self, ctx: &Ctx) -> Option<SyntheticTokenId>;
 }
 
-trait TokenConvertor: Sized {
+trait TokenConverter: Sized {
     type Token: SrcToken<Self>;
 
     fn convert_doc_comment(&self, token: &Self::Token) -> Option<Vec<tt::TokenTree>>;
@@ -454,25 +486,25 @@ trait TokenConvertor: Sized {
     fn id_alloc(&mut self) -> &mut TokenIdAlloc;
 }
 
-impl<'a> SrcToken<RawConvertor<'a>> for usize {
-    fn kind(&self, ctx: &RawConvertor<'a>) -> SyntaxKind {
+impl<'a> SrcToken<RawConverter<'a>> for usize {
+    fn kind(&self, ctx: &RawConverter<'a>) -> SyntaxKind {
         ctx.lexed.kind(*self)
     }
 
-    fn to_char(&self, ctx: &RawConvertor<'a>) -> Option<char> {
+    fn to_char(&self, ctx: &RawConverter<'a>) -> Option<char> {
         ctx.lexed.text(*self).chars().next()
     }
 
-    fn to_text(&self, ctx: &RawConvertor<'_>) -> SmolStr {
+    fn to_text(&self, ctx: &RawConverter<'_>) -> SmolStr {
         ctx.lexed.text(*self).into()
     }
 
-    fn synthetic_id(&self, _ctx: &RawConvertor<'a>) -> Option<SyntheticTokenId> {
+    fn synthetic_id(&self, _ctx: &RawConverter<'a>) -> Option<SyntheticTokenId> {
         None
     }
 }
 
-impl<'a> TokenConvertor for RawConvertor<'a> {
+impl<'a> TokenConverter for RawConverter<'a> {
     type Token = usize;
 
     fn convert_doc_comment(&self, &token: &usize) -> Option<Vec<tt::TokenTree>> {
@@ -504,7 +536,7 @@ impl<'a> TokenConvertor for RawConvertor<'a> {
     }
 }
 
-struct Convertor {
+struct Converter {
     id_alloc: TokenIdAlloc,
     current: Option<SyntaxToken>,
     current_synthetic: Vec<SyntheticToken>,
@@ -515,7 +547,7 @@ struct Convertor {
     punct_offset: Option<(SyntaxToken, TextSize)>,
 }
 
-impl Convertor {
+impl Converter {
     fn new(
         node: &SyntaxNode,
         global_offset: TextSize,
@@ -523,11 +555,11 @@ impl Convertor {
         next_id: u32,
         mut replace: FxHashMap<SyntaxElement, Vec<SyntheticToken>>,
         mut append: FxHashMap<SyntaxElement, Vec<SyntheticToken>>,
-    ) -> Convertor {
+    ) -> Converter {
         let range = node.text_range();
         let mut preorder = node.preorder_with_tokens();
         let (first, synthetic) = Self::next_token(&mut preorder, &mut replace, &mut append);
-        Convertor {
+        Converter {
             id_alloc: { TokenIdAlloc { map: existing_token_map, global_offset, next_id } },
             current: first,
             current_synthetic: synthetic,
@@ -590,15 +622,15 @@ impl SynToken {
     }
 }
 
-impl SrcToken<Convertor> for SynToken {
-    fn kind(&self, _ctx: &Convertor) -> SyntaxKind {
+impl SrcToken<Converter> for SynToken {
+    fn kind(&self, ctx: &Converter) -> SyntaxKind {
         match self {
             SynToken::Ordinary(token) => token.kind(),
-            SynToken::Punch(token, _) => token.kind(),
+            SynToken::Punch(..) => SyntaxKind::from_char(self.to_char(ctx).unwrap()).unwrap(),
             SynToken::Synthetic(token) => token.kind,
         }
     }
-    fn to_char(&self, _ctx: &Convertor) -> Option<char> {
+    fn to_char(&self, _ctx: &Converter) -> Option<char> {
         match self {
             SynToken::Ordinary(_) => None,
             SynToken::Punch(it, i) => it.text().chars().nth((*i).into()),
@@ -606,7 +638,7 @@ impl SrcToken<Convertor> for SynToken {
             SynToken::Synthetic(_) => None,
         }
     }
-    fn to_text(&self, _ctx: &Convertor) -> SmolStr {
+    fn to_text(&self, _ctx: &Converter) -> SmolStr {
         match self {
             SynToken::Ordinary(token) => token.text().into(),
             SynToken::Punch(token, _) => token.text().into(),
@@ -614,7 +646,7 @@ impl SrcToken<Convertor> for SynToken {
         }
     }
 
-    fn synthetic_id(&self, _ctx: &Convertor) -> Option<SyntheticTokenId> {
+    fn synthetic_id(&self, _ctx: &Converter) -> Option<SyntheticTokenId> {
         match self {
             SynToken::Synthetic(token) => Some(token.id),
             _ => None,
@@ -622,7 +654,7 @@ impl SrcToken<Convertor> for SynToken {
     }
 }
 
-impl TokenConvertor for Convertor {
+impl TokenConverter for Converter {
     type Token = SynToken;
     fn convert_doc_comment(&self, token: &Self::Token) -> Option<Vec<tt::TokenTree>> {
         convert_doc_comment(token.token()?)
@@ -651,7 +683,7 @@ impl TokenConvertor for Convertor {
         }
 
         let curr = self.current.clone()?;
-        if !&self.range.contains_range(curr.text_range()) {
+        if !self.range.contains_range(curr.text_range()) {
             return None;
         }
         let (new_current, new_synth) =
@@ -809,12 +841,15 @@ impl<'a> TtTreeSink<'a> {
         let next = last.bump();
         if let (
             Some(tt::buffer::TokenTreeRef::Leaf(tt::Leaf::Punct(curr), _)),
-            Some(tt::buffer::TokenTreeRef::Leaf(tt::Leaf::Punct(_), _)),
+            Some(tt::buffer::TokenTreeRef::Leaf(tt::Leaf::Punct(next), _)),
         ) = (last.token_tree(), next.token_tree())
         {
             // Note: We always assume the semi-colon would be the last token in
             // other parts of RA such that we don't add whitespace here.
-            if curr.spacing == tt::Spacing::Alone && curr.char != ';' {
+            //
+            // When `next` is a `Punct` of `'`, that's a part of a lifetime identifier so we don't
+            // need to add whitespace either.
+            if curr.spacing == tt::Spacing::Alone && curr.char != ';' && next.char != '\'' {
                 self.inner.token(WHITESPACE, " ");
                 self.text_pos += TextSize::of(' ');
             }
diff --git a/src/tools/rust-analyzer/crates/mbe/src/syntax_bridge/tests.rs b/src/tools/rust-analyzer/crates/mbe/src/syntax_bridge/tests.rs
new file mode 100644
index 000000000..4e04d2bc1
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/mbe/src/syntax_bridge/tests.rs
@@ -0,0 +1,93 @@
+use std::collections::HashMap;
+
+use syntax::{ast, AstNode};
+use test_utils::extract_annotations;
+use tt::{
+    buffer::{TokenBuffer, TokenTreeRef},
+    Leaf, Punct, Spacing,
+};
+
+use super::syntax_node_to_token_tree;
+
+fn check_punct_spacing(fixture: &str) {
+    let source_file = ast::SourceFile::parse(fixture).ok().unwrap();
+    let (subtree, token_map) = syntax_node_to_token_tree(source_file.syntax());
+    let mut annotations: HashMap<_, _> = extract_annotations(fixture)
+        .into_iter()
+        .map(|(range, annotation)| {
+            let token = token_map.token_by_range(range).expect("no token found");
+            let spacing = match annotation.as_str() {
+                "Alone" => Spacing::Alone,
+                "Joint" => Spacing::Joint,
+                a => panic!("unknown annotation: {}", a),
+            };
+            (token, spacing)
+        })
+        .collect();
+
+    let buf = TokenBuffer::from_subtree(&subtree);
+    let mut cursor = buf.begin();
+    while !cursor.eof() {
+        while let Some(token_tree) = cursor.token_tree() {
+            if let TokenTreeRef::Leaf(Leaf::Punct(Punct { spacing, id, .. }), _) = token_tree {
+                if let Some(expected) = annotations.remove(&id) {
+                    assert_eq!(expected, *spacing);
+                }
+            }
+            cursor = cursor.bump_subtree();
+        }
+        cursor = cursor.bump();
+    }
+
+    assert!(annotations.is_empty(), "unchecked annotations: {:?}", annotations);
+}
+
+#[test]
+fn punct_spacing() {
+    check_punct_spacing(
+        r#"
+fn main() {
+    0+0;
+   //^ Alone
+    0+(0);
+   //^ Alone
+    0<=0;
+   //^ Joint
+   // ^ Alone
+    0<=(0);
+   // ^ Alone
+    a=0;
+   //^ Alone
+    a=(0);
+   //^ Alone
+    a+=0;
+   //^ Joint
+   // ^ Alone
+    a+=(0);
+   // ^ Alone
+    a&&b;
+   //^ Joint
+   // ^ Alone
+    a&&(b);
+   // ^ Alone
+    foo::bar;
+   //  ^ Joint
+   //   ^ Alone
+    use foo::{bar,baz,};
+   //       ^ Alone
+   //            ^ Alone
+   //                ^ Alone
+    struct Struct<'a> {};
+   //            ^ Joint
+   //             ^ Joint
+    Struct::<0>;
+   //       ^ Alone
+    Struct::<{0}>;
+   //       ^ Alone
+    ;;
+  //^ Joint
+  // ^ Alone
+}
+        "#,
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/parser/Cargo.toml b/src/tools/rust-analyzer/crates/parser/Cargo.toml
index a286a6bcd..d1420de89 100644
--- a/src/tools/rust-analyzer/crates/parser/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/parser/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/paths/Cargo.toml b/src/tools/rust-analyzer/crates/paths/Cargo.toml
index 5e83de7d9..d23a63d2a 100644
--- a/src/tools/rust-analyzer/crates/paths/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/paths/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml b/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml
index 54879c187..f261f3def 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv-cli/Cargo.toml b/src/tools/rust-analyzer/crates/proc-macro-srv-cli/Cargo.toml
index 9d0da5dee..7991e125a 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv-cli/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv-cli/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [dependencies]
 proc-macro-srv = { version = "0.0.0", path = "../proc-macro-srv" }
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml b/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml
index e39026ac7..a136abc12 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/abis/mod.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/abis/mod.rs
index 2f854bc15..0ce099ae0 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/abis/mod.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/abis/mod.rs
@@ -117,7 +117,7 @@ impl Abi {
                 let inner = unsafe { Abi_1_63::from_lib(lib, symbol_name) }?;
                 Ok(Abi::Abi1_63(inner))
             }
-            _ => Err(LoadProcMacroDylibError::UnsupportedABI),
+            _ => Err(LoadProcMacroDylibError::UnsupportedABI(info.version_string.clone())),
         }
     }
 
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs
index 7aba74e53..0722cd89d 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs
@@ -80,14 +80,14 @@ fn load_library(file: &Path) -> Result<Library, libloading::Error> {
 pub enum LoadProcMacroDylibError {
     Io(io::Error),
     LibLoading(libloading::Error),
-    UnsupportedABI,
+    UnsupportedABI(String),
 }
 
 impl fmt::Display for LoadProcMacroDylibError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             Self::Io(e) => e.fmt(f),
-            Self::UnsupportedABI => write!(f, "unsupported ABI version"),
+            Self::UnsupportedABI(v) => write!(f, "unsupported ABI `{v}`"),
             Self::LibLoading(e) => e.fmt(f),
         }
     }
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs
index 72a2dfe72..b4f5ebd15 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs
@@ -113,12 +113,12 @@ impl ProcMacroSrv {
 
     fn expander(&mut self, path: &Path) -> Result<&dylib::Expander, String> {
         let time = fs::metadata(path).and_then(|it| it.modified()).map_err(|err| {
-            format!("Failed to get file metadata for {}: {:?}", path.display(), err)
+            format!("Failed to get file metadata for {}: {}", path.display(), err)
         })?;
 
         Ok(match self.expanders.entry((path.to_path_buf(), time)) {
             Entry::Vacant(v) => v.insert(dylib::Expander::new(path).map_err(|err| {
-                format!("Cannot create expander for {}: {:?}", path.display(), err)
+                format!("Cannot create expander for {}: {}", path.display(), err)
             })?),
             Entry::Occupied(e) => e.into_mut(),
         })
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/mod.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/mod.rs
index b46cdddcf..cc0fc91fe 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/mod.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/mod.rs
@@ -19,7 +19,7 @@ fn test_derive_error() {
         expect![[r##"
             SUBTREE $
               IDENT   compile_error 4294967295
-              PUNCH   ! [joint] 4294967295
+              PUNCH   ! [alone] 4294967295
               SUBTREE () 4294967295
                 LITERAL "#[derive(DeriveError)] struct S ;" 4294967295
               PUNCH   ; [alone] 4294967295"##]],
@@ -109,7 +109,7 @@ fn test_fn_like_macro_clone_literals() {
               PUNCH   , [alone] 4294967295
               LITERAL 2_u32 4294967295
               PUNCH   , [alone] 4294967295
-              PUNCH   - [joint] 4294967295
+              PUNCH   - [alone] 4294967295
               LITERAL 4i64 4294967295
               PUNCH   , [alone] 4294967295
               LITERAL 3.14f32 4294967295
@@ -130,7 +130,7 @@ fn test_attr_macro() {
         expect![[r##"
             SUBTREE $
               IDENT   compile_error 4294967295
-              PUNCH   ! [joint] 4294967295
+              PUNCH   ! [alone] 4294967295
               SUBTREE () 4294967295
                 LITERAL "#[attr_error(some arguments)] mod m {}" 4294967295
               PUNCH   ; [alone] 4294967295"##]],
diff --git a/src/tools/rust-analyzer/crates/proc-macro-test/Cargo.toml b/src/tools/rust-analyzer/crates/proc-macro-test/Cargo.toml
index 684477191..d2a79f910 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-test/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/proc-macro-test/Cargo.toml
@@ -3,7 +3,7 @@ name = "proc-macro-test"
 version = "0.0.0"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 publish = false
 
 [lib]
diff --git a/src/tools/rust-analyzer/crates/proc-macro-test/imp/Cargo.toml b/src/tools/rust-analyzer/crates/proc-macro-test/imp/Cargo.toml
index 2d1fc3c5c..1bd14070e 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-test/imp/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/proc-macro-test/imp/Cargo.toml
@@ -3,7 +3,7 @@ name = "proc-macro-test-impl"
 version = "0.0.0"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 publish = false
 
 [lib]
diff --git a/src/tools/rust-analyzer/crates/profile/Cargo.toml b/src/tools/rust-analyzer/crates/profile/Cargo.toml
index 5697aea96..01d1735bf 100644
--- a/src/tools/rust-analyzer/crates/profile/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/profile/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/project-model/Cargo.toml b/src/tools/rust-analyzer/crates/project-model/Cargo.toml
index cf9868740..39902a532 100644
--- a/src/tools/rust-analyzer/crates/project-model/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/project-model/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/project-model/src/build_scripts.rs b/src/tools/rust-analyzer/crates/project-model/src/build_scripts.rs
index a26a7c57a..ae2b41f27 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/build_scripts.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/build_scripts.rs
@@ -69,7 +69,7 @@ impl WorkspaceBuildScripts {
                 cmd.args(&["check", "--quiet", "--workspace", "--message-format=json"]);
 
                 // --all-targets includes tests, benches and examples in addition to the
-                // default lib and bins. This is an independent concept from the --targets
+                // default lib and bins. This is an independent concept from the --target
                 // flag below.
                 cmd.arg("--all-targets");
 
diff --git a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
index b4c2ba436..02ec7a4f6 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
@@ -270,11 +270,7 @@ impl CargoWorkspace {
         config: &CargoConfig,
         progress: &dyn Fn(String),
     ) -> Result<cargo_metadata::Metadata> {
-        let target = config
-            .target
-            .clone()
-            .or_else(|| cargo_config_build_target(cargo_toml, &config.extra_env))
-            .or_else(|| rustc_discover_host_triple(cargo_toml, &config.extra_env));
+        let targets = find_list_of_build_targets(config, cargo_toml);
 
         let mut meta = MetadataCommand::new();
         meta.cargo_path(toolchain::cargo());
@@ -294,8 +290,12 @@ impl CargoWorkspace {
         }
         meta.current_dir(current_dir.as_os_str());
 
-        if let Some(target) = target {
-            meta.other_options(vec![String::from("--filter-platform"), target]);
+        if !targets.is_empty() {
+            let other_options: Vec<_> = targets
+                .into_iter()
+                .flat_map(|target| ["--filter-platform".to_string(), target])
+                .collect();
+            meta.other_options(other_options);
         }
 
         // FIXME: Fetching metadata is a slow process, as it might require
@@ -469,6 +469,19 @@ impl CargoWorkspace {
     }
 }
 
+fn find_list_of_build_targets(config: &CargoConfig, cargo_toml: &ManifestPath) -> Vec<String> {
+    if let Some(target) = &config.target {
+        return [target.into()].to_vec();
+    }
+
+    let build_targets = cargo_config_build_target(cargo_toml, &config.extra_env);
+    if !build_targets.is_empty() {
+        return build_targets;
+    }
+
+    rustc_discover_host_triple(cargo_toml, &config.extra_env).into_iter().collect()
+}
+
 fn rustc_discover_host_triple(
     cargo_toml: &ManifestPath,
     extra_env: &FxHashMap<String, String>,
@@ -499,7 +512,7 @@ fn rustc_discover_host_triple(
 fn cargo_config_build_target(
     cargo_toml: &ManifestPath,
     extra_env: &FxHashMap<String, String>,
-) -> Option<String> {
+) -> Vec<String> {
     let mut cargo_config = Command::new(toolchain::cargo());
     cargo_config.envs(extra_env);
     cargo_config
@@ -507,12 +520,21 @@ fn cargo_config_build_target(
         .args(&["-Z", "unstable-options", "config", "get", "build.target"])
         .env("RUSTC_BOOTSTRAP", "1");
     // if successful we receive `build.target = "target-triple"`
+    // or `build.target = ["<target 1>", ..]`
     tracing::debug!("Discovering cargo config target by {:?}", cargo_config);
-    match utf8_stdout(cargo_config) {
-        Ok(stdout) => stdout
-            .strip_prefix("build.target = \"")
-            .and_then(|stdout| stdout.strip_suffix('"'))
-            .map(ToOwned::to_owned),
-        Err(_) => None,
+    utf8_stdout(cargo_config).map(parse_output_cargo_config_build_target).unwrap_or_default()
+}
+
+fn parse_output_cargo_config_build_target(stdout: String) -> Vec<String> {
+    let trimmed = stdout.trim_start_matches("build.target = ").trim_matches('"');
+
+    if !trimmed.starts_with('[') {
+        return [trimmed.to_string()].to_vec();
+    }
+
+    let res = serde_json::from_str(trimmed);
+    if let Err(e) = &res {
+        tracing::warn!("Failed to parse `build.target` as an array of target: {}`", e);
     }
+    res.unwrap_or_default()
 }
diff --git a/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs b/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
index fa8d76f3f..f6c09a27c 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
@@ -128,14 +128,18 @@ impl Sysroot {
         }
 
         if let Some(alloc) = sysroot.by_name("alloc") {
-            if let Some(core) = sysroot.by_name("core") {
-                sysroot.crates[alloc].deps.push(core);
+            for dep in ALLOC_DEPS.trim().lines() {
+                if let Some(dep) = sysroot.by_name(dep) {
+                    sysroot.crates[alloc].deps.push(dep)
+                }
             }
         }
 
         if let Some(proc_macro) = sysroot.by_name("proc_macro") {
-            if let Some(std) = sysroot.by_name("std") {
-                sysroot.crates[proc_macro].deps.push(std);
+            for dep in PROC_MACRO_DEPS.trim().lines() {
+                if let Some(dep) = sysroot.by_name(dep) {
+                    sysroot.crates[proc_macro].deps.push(dep)
+                }
             }
         }
 
@@ -239,6 +243,7 @@ fn get_rust_src(sysroot_path: &AbsPath) -> Option<AbsPathBuf> {
 
 const SYSROOT_CRATES: &str = "
 alloc
+backtrace
 core
 panic_abort
 panic_unwind
@@ -246,17 +251,19 @@ proc_macro
 profiler_builtins
 std
 stdarch/crates/std_detect
-term
 test
 unwind";
 
+const ALLOC_DEPS: &str = "core";
+
 const STD_DEPS: &str = "
 alloc
-core
-panic_abort
 panic_unwind
+panic_abort
+core
 profiler_builtins
+unwind
 std_detect
-term
-test
-unwind";
+test";
+
+const PROC_MACRO_DEPS: &str = "std";
diff --git a/src/tools/rust-analyzer/crates/project-model/src/tests.rs b/src/tools/rust-analyzer/crates/project-model/src/tests.rs
index e2444e249..a1cb438bd 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/tests.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/tests.rs
@@ -1566,10 +1566,10 @@ fn rust_project_hello_world_project_model() {
                             },
                             Dependency {
                                 crate_id: CrateId(
-                                    1,
+                                    3,
                                 ),
                                 name: CrateName(
-                                    "core",
+                                    "panic_unwind",
                                 ),
                                 prelude: true,
                             },
@@ -1584,10 +1584,10 @@ fn rust_project_hello_world_project_model() {
                             },
                             Dependency {
                                 crate_id: CrateId(
-                                    3,
+                                    1,
                                 ),
                                 name: CrateName(
-                                    "panic_unwind",
+                                    "core",
                                 ),
                                 prelude: true,
                             },
@@ -1602,40 +1602,31 @@ fn rust_project_hello_world_project_model() {
                             },
                             Dependency {
                                 crate_id: CrateId(
-                                    7,
+                                    9,
                                 ),
                                 name: CrateName(
-                                    "std_detect",
+                                    "unwind",
                                 ),
                                 prelude: true,
                             },
                             Dependency {
                                 crate_id: CrateId(
-                                    8,
+                                    7,
                                 ),
                                 name: CrateName(
-                                    "term",
+                                    "std_detect",
                                 ),
                                 prelude: true,
                             },
                             Dependency {
                                 crate_id: CrateId(
-                                    9,
+                                    8,
                                 ),
                                 name: CrateName(
                                     "test",
                                 ),
                                 prelude: true,
                             },
-                            Dependency {
-                                crate_id: CrateId(
-                                    10,
-                                ),
-                                name: CrateName(
-                                    "unwind",
-                                ),
-                                prelude: true,
-                            },
                         ],
                         proc_macro: Err(
                             "no proc macro loaded for sysroot crate",
@@ -1690,40 +1681,6 @@ fn rust_project_hello_world_project_model() {
                         display_name: Some(
                             CrateDisplayName {
                                 crate_name: CrateName(
-                                    "term",
-                                ),
-                                canonical_name: "term",
-                            },
-                        ),
-                        cfg_options: CfgOptions(
-                            [],
-                        ),
-                        potential_cfg_options: CfgOptions(
-                            [],
-                        ),
-                        env: Env {
-                            entries: {},
-                        },
-                        dependencies: [],
-                        proc_macro: Err(
-                            "no proc macro loaded for sysroot crate",
-                        ),
-                        origin: Lang(
-                            Other,
-                        ),
-                        is_proc_macro: false,
-                    },
-                    CrateId(
-                        9,
-                    ): CrateData {
-                        root_file_id: FileId(
-                            10,
-                        ),
-                        edition: Edition2018,
-                        version: None,
-                        display_name: Some(
-                            CrateDisplayName {
-                                crate_name: CrateName(
                                     "test",
                                 ),
                                 canonical_name: "test",
@@ -1748,10 +1705,10 @@ fn rust_project_hello_world_project_model() {
                         is_proc_macro: false,
                     },
                     CrateId(
-                        10,
+                        9,
                     ): CrateData {
                         root_file_id: FileId(
-                            11,
+                            10,
                         ),
                         edition: Edition2018,
                         version: None,
@@ -1782,10 +1739,10 @@ fn rust_project_hello_world_project_model() {
                         is_proc_macro: false,
                     },
                     CrateId(
-                        11,
+                        10,
                     ): CrateData {
                         root_file_id: FileId(
-                            12,
+                            11,
                         ),
                         edition: Edition2018,
                         version: None,
@@ -1836,7 +1793,7 @@ fn rust_project_hello_world_project_model() {
                             },
                             Dependency {
                                 crate_id: CrateId(
-                                    9,
+                                    8,
                                 ),
                                 name: CrateName(
                                     "test",
diff --git a/src/tools/rust-analyzer/crates/project-model/src/workspace.rs b/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
index 2780c62ed..3d199ed24 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
@@ -377,6 +377,21 @@ impl ProjectWorkspace {
         }
     }
 
+    pub fn find_sysroot_proc_macro_srv(&self) -> Option<AbsPathBuf> {
+        match self {
+            ProjectWorkspace::Cargo { sysroot: Some(sysroot), .. }
+            | ProjectWorkspace::Json { sysroot: Some(sysroot), .. } => {
+                let standalone_server_name =
+                    format!("rust-analyzer-proc-macro-srv{}", std::env::consts::EXE_SUFFIX);
+                ["libexec", "lib"]
+                    .into_iter()
+                    .map(|segment| sysroot.root().join(segment).join(&standalone_server_name))
+                    .find(|server_path| std::fs::metadata(&server_path).is_ok())
+            }
+            _ => None,
+        }
+    }
+
     /// Returns the roots for the current `ProjectWorkspace`
     /// The return type contains the path and whether or not
     /// the root is a member of the current workspace
@@ -509,14 +524,14 @@ impl ProjectWorkspace {
                 build_scripts,
                 toolchain: _,
             } => cargo_to_crate_graph(
-                rustc_cfg.clone(),
-                cfg_overrides,
                 load_proc_macro,
                 load,
+                rustc,
                 cargo,
-                build_scripts,
                 sysroot.as_ref(),
-                rustc,
+                rustc_cfg.clone(),
+                cfg_overrides,
+                build_scripts,
             ),
             ProjectWorkspace::DetachedFiles { files, sysroot, rustc_cfg } => {
                 detached_files_to_crate_graph(rustc_cfg.clone(), load, files, sysroot)
@@ -602,7 +617,7 @@ fn project_json_to_crate_graph(
     for (from, krate) in project.crates() {
         if let Some(&from) = crates.get(&from) {
             if let Some((public_deps, libproc_macro)) = &sysroot_deps {
-                public_deps.add(from, &mut crate_graph);
+                public_deps.add_to_crate_graph(&mut crate_graph, from);
                 if krate.is_proc_macro {
                     if let Some(proc_macro) = libproc_macro {
                         add_dep(
@@ -626,14 +641,14 @@ fn project_json_to_crate_graph(
 }
 
 fn cargo_to_crate_graph(
-    rustc_cfg: Vec<CfgFlag>,
-    override_cfg: &CfgOverrides,
     load_proc_macro: &mut dyn FnMut(&str, &AbsPath) -> ProcMacroLoadResult,
     load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
+    rustc: &Option<CargoWorkspace>,
     cargo: &CargoWorkspace,
-    build_scripts: &WorkspaceBuildScripts,
     sysroot: Option<&Sysroot>,
-    rustc: &Option<CargoWorkspace>,
+    rustc_cfg: Vec<CfgFlag>,
+    override_cfg: &CfgOverrides,
+    build_scripts: &WorkspaceBuildScripts,
 ) -> CrateGraph {
     let _p = profile::span("cargo_to_crate_graph");
     let mut crate_graph = CrateGraph::default();
@@ -642,13 +657,15 @@ fn cargo_to_crate_graph(
         None => (SysrootPublicDeps::default(), None),
     };
 
-    let mut cfg_options = CfgOptions::default();
-    cfg_options.extend(rustc_cfg);
+    let cfg_options = {
+        let mut cfg_options = CfgOptions::default();
+        cfg_options.extend(rustc_cfg);
+        cfg_options.insert_atom("debug_assertions".into());
+        cfg_options
+    };
 
     let mut pkg_to_lib_crate = FxHashMap::default();
 
-    cfg_options.insert_atom("debug_assertions".into());
-
     let mut pkg_crates = FxHashMap::default();
     // Does any crate signal to rust-analyzer that they need the rustc_private crates?
     let mut has_private = false;
@@ -723,7 +740,7 @@ fn cargo_to_crate_graph(
         // Set deps to the core, std and to the lib target of the current package
         for &(from, kind) in pkg_crates.get(&pkg).into_iter().flatten() {
             // Add sysroot deps first so that a lib target named `core` etc. can overwrite them.
-            public_deps.add(from, &mut crate_graph);
+            public_deps.add_to_crate_graph(&mut crate_graph, from);
 
             if let Some((to, name)) = lib_tgt.clone() {
                 if to != from && kind != TargetKind::BuildScript {
@@ -767,15 +784,16 @@ fn cargo_to_crate_graph(
         if let Some(rustc_workspace) = rustc {
             handle_rustc_crates(
                 &mut crate_graph,
-                rustc_workspace,
+                &mut pkg_to_lib_crate,
                 load,
-                &cfg_options,
-                override_cfg,
                 load_proc_macro,
-                &mut pkg_to_lib_crate,
-                &public_deps,
+                rustc_workspace,
                 cargo,
+                &public_deps,
+                libproc_macro,
                 &pkg_crates,
+                &cfg_options,
+                override_cfg,
                 build_scripts,
             );
         }
@@ -825,28 +843,29 @@ fn detached_files_to_crate_graph(
             },
         );
 
-        public_deps.add(detached_file_crate, &mut crate_graph);
+        public_deps.add_to_crate_graph(&mut crate_graph, detached_file_crate);
     }
     crate_graph
 }
 
 fn handle_rustc_crates(
     crate_graph: &mut CrateGraph,
-    rustc_workspace: &CargoWorkspace,
+    pkg_to_lib_crate: &mut FxHashMap<Package, CrateId>,
     load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
-    cfg_options: &CfgOptions,
-    override_cfg: &CfgOverrides,
     load_proc_macro: &mut dyn FnMut(&str, &AbsPath) -> ProcMacroLoadResult,
-    pkg_to_lib_crate: &mut FxHashMap<Package, CrateId>,
-    public_deps: &SysrootPublicDeps,
+    rustc_workspace: &CargoWorkspace,
     cargo: &CargoWorkspace,
+    public_deps: &SysrootPublicDeps,
+    libproc_macro: Option<CrateId>,
     pkg_crates: &FxHashMap<Package, Vec<(CrateId, TargetKind)>>,
+    cfg_options: &CfgOptions,
+    override_cfg: &CfgOverrides,
     build_scripts: &WorkspaceBuildScripts,
 ) {
     let mut rustc_pkg_crates = FxHashMap::default();
     // The root package of the rustc-dev component is rustc_driver, so we match that
     let root_pkg =
-        rustc_workspace.packages().find(|package| rustc_workspace[*package].name == "rustc_driver");
+        rustc_workspace.packages().find(|&package| rustc_workspace[package].name == "rustc_driver");
     // The rustc workspace might be incomplete (such as if rustc-dev is not
     // installed for the current toolchain) and `rustc_source` is set to discover.
     if let Some(root_pkg) = root_pkg {
@@ -901,7 +920,16 @@ fn handle_rustc_crates(
                     );
                     pkg_to_lib_crate.insert(pkg, crate_id);
                     // Add dependencies on core / std / alloc for this crate
-                    public_deps.add(crate_id, crate_graph);
+                    public_deps.add_to_crate_graph(crate_graph, crate_id);
+                    if let Some(proc_macro) = libproc_macro {
+                        add_dep_with_prelude(
+                            crate_graph,
+                            crate_id,
+                            CrateName::new("proc_macro").unwrap(),
+                            proc_macro,
+                            rustc_workspace[tgt].is_proc_macro,
+                        );
+                    }
                     rustc_pkg_crates.entry(pkg).or_insert_with(Vec::new).push(crate_id);
                 }
             }
@@ -1009,7 +1037,7 @@ struct SysrootPublicDeps {
 
 impl SysrootPublicDeps {
     /// Makes `from` depend on the public sysroot crates.
-    fn add(&self, from: CrateId, crate_graph: &mut CrateGraph) {
+    fn add_to_crate_graph(&self, crate_graph: &mut CrateGraph, from: CrateId) {
         for (name, krate, prelude) in &self.deps {
             add_dep_with_prelude(crate_graph, from, name.clone(), *krate, *prelude);
         }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml b/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml
index 544502853..56f14fe18 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml
@@ -8,7 +8,7 @@ documentation = "https://rust-analyzer.github.io/manual.html"
 license = "MIT OR Apache-2.0"
 autobins = false
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
@@ -23,7 +23,7 @@ crossbeam-channel = "0.5.5"
 dissimilar = "1.0.4"
 itertools = "0.10.5"
 scip = "0.1.1"
-lsp-types = { version = "0.93.1", features = ["proposed"] }
+lsp-types = { version = "=0.93.2", features = ["proposed"] }
 parking_lot = "0.12.1"
 xflags = "0.3.0"
 oorandom = "11.1.3"
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/bin/main.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/bin/main.rs
index eabfcf194..7bf595d2a 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/bin/main.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/bin/main.rs
@@ -11,7 +11,7 @@ use std::{env, fs, path::Path, process};
 
 use lsp_server::Connection;
 use project_model::ProjectManifest;
-use rust_analyzer::{cli::flags, config::Config, from_json, lsp_ext::supports_utf8, Result};
+use rust_analyzer::{cli::flags, config::Config, from_json, Result};
 use vfs::AbsPathBuf;
 
 #[cfg(all(feature = "mimalloc"))]
@@ -191,11 +191,7 @@ fn run_server() -> Result<()> {
             name: String::from("rust-analyzer"),
             version: Some(rust_analyzer::version().to_string()),
         }),
-        offset_encoding: if supports_utf8(config.caps()) {
-            Some("utf-8".to_string())
-        } else {
-            None
-        },
+        offset_encoding: None,
     };
 
     let initialize_result = serde_json::to_value(initialize_result).unwrap();
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/caps.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/caps.rs
index cda95cd86..723b888d9 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/caps.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/caps.rs
@@ -6,19 +6,25 @@ use lsp_types::{
     FileOperationFilter, FileOperationPattern, FileOperationPatternKind,
     FileOperationRegistrationOptions, FoldingRangeProviderCapability, HoverProviderCapability,
     ImplementationProviderCapability, InlayHintOptions, InlayHintServerCapabilities, OneOf,
-    RenameOptions, SaveOptions, SelectionRangeProviderCapability, SemanticTokensFullOptions,
-    SemanticTokensLegend, SemanticTokensOptions, ServerCapabilities, SignatureHelpOptions,
-    TextDocumentSyncCapability, TextDocumentSyncKind, TextDocumentSyncOptions,
-    TypeDefinitionProviderCapability, WorkDoneProgressOptions,
+    PositionEncodingKind, RenameOptions, SaveOptions, SelectionRangeProviderCapability,
+    SemanticTokensFullOptions, SemanticTokensLegend, SemanticTokensOptions, ServerCapabilities,
+    SignatureHelpOptions, TextDocumentSyncCapability, TextDocumentSyncKind,
+    TextDocumentSyncOptions, TypeDefinitionProviderCapability, WorkDoneProgressOptions,
     WorkspaceFileOperationsServerCapabilities, WorkspaceServerCapabilities,
 };
 use serde_json::json;
 
 use crate::config::{Config, RustfmtConfig};
+use crate::lsp_ext::supports_utf8;
 use crate::semantic_tokens;
 
 pub fn server_capabilities(config: &Config) -> ServerCapabilities {
     ServerCapabilities {
+        position_encoding: if supports_utf8(config.caps()) {
+            Some(PositionEncodingKind::UTF8)
+        } else {
+            None
+        },
         text_document_sync: Some(TextDocumentSyncCapability::Options(TextDocumentSyncOptions {
             open_close: Some(true),
             change: Some(TextDocumentSyncKind::INCREMENTAL),
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cargo_target_spec.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cargo_target_spec.rs
index 6ede194ba..cf51cf15a 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cargo_target_spec.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cargo_target_spec.rs
@@ -3,11 +3,11 @@
 use std::mem;
 
 use cfg::{CfgAtom, CfgExpr};
-use ide::{FileId, RunnableKind, TestId};
+use ide::{Cancellable, FileId, RunnableKind, TestId};
 use project_model::{self, CargoFeatures, ManifestPath, TargetKind};
 use vfs::AbsPathBuf;
 
-use crate::{global_state::GlobalStateSnapshot, Result};
+use crate::global_state::GlobalStateSnapshot;
 
 /// Abstract representation of Cargo target.
 ///
@@ -29,7 +29,7 @@ impl CargoTargetSpec {
         spec: Option<CargoTargetSpec>,
         kind: &RunnableKind,
         cfg: &Option<CfgExpr>,
-    ) -> Result<(Vec<String>, Vec<String>)> {
+    ) -> (Vec<String>, Vec<String>) {
         let mut args = Vec::new();
         let mut extra_args = Vec::new();
 
@@ -111,13 +111,13 @@ impl CargoTargetSpec {
                 }
             }
         }
-        Ok((args, extra_args))
+        (args, extra_args)
     }
 
     pub(crate) fn for_file(
         global_state_snapshot: &GlobalStateSnapshot,
         file_id: FileId,
-    ) -> Result<Option<CargoTargetSpec>> {
+    ) -> Cancellable<Option<CargoTargetSpec>> {
         let crate_id = match &*global_state_snapshot.analysis.crates_for(file_id)? {
             &[crate_id, ..] => crate_id,
             _ => return Ok(None),
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/load_cargo.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/load_cargo.rs
index 5dba545b8..762d7d3a1 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/load_cargo.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/load_cargo.rs
@@ -60,24 +60,12 @@ pub fn load_workspace(
     };
 
     let proc_macro_client = if load_config.with_proc_macro {
-        let mut path = AbsPathBuf::assert(std::env::current_exe()?);
-        let mut args = vec!["proc-macro"];
-
-        if let ProjectWorkspace::Cargo { sysroot, .. } | ProjectWorkspace::Json { sysroot, .. } =
-            &ws
-        {
-            if let Some(sysroot) = sysroot.as_ref() {
-                let standalone_server_name =
-                    format!("rust-analyzer-proc-macro-srv{}", std::env::consts::EXE_SUFFIX);
-                let server_path = sysroot.root().join("libexec").join(&standalone_server_name);
-                if std::fs::metadata(&server_path).is_ok() {
-                    path = server_path;
-                    args = vec![];
-                }
-            }
-        }
+        let (server_path, args): (_, &[_]) = match ws.find_sysroot_proc_macro_srv() {
+            Some(server_path) => (server_path, &[]),
+            None => (AbsPathBuf::assert(std::env::current_exe()?), &["proc-macro"]),
+        };
 
-        ProcMacroServer::spawn(path.clone(), args.clone()).map_err(|e| e.to_string())
+        ProcMacroServer::spawn(server_path, args).map_err(|e| e.to_string())
     } else {
         Err("proc macro server disabled".to_owned())
     };
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/lsif.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/lsif.rs
index 748306ea5..c74ddabb1 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/lsif.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/lsif.rs
@@ -20,7 +20,7 @@ use crate::cli::{
     load_cargo::{load_workspace, LoadCargoConfig},
     Result,
 };
-use crate::line_index::{LineEndings, LineIndex, OffsetEncoding};
+use crate::line_index::{LineEndings, LineIndex, PositionEncoding};
 use crate::to_proto;
 use crate::version::version;
 
@@ -106,12 +106,12 @@ impl LsifManager<'_> {
                 manager: "cargo".to_string(),
                 uri: None,
                 content: None,
-                repository: Some(lsif::Repository {
-                    url: pi.repo,
+                repository: pi.repo.map(|url| lsif::Repository {
+                    url,
                     r#type: "git".to_string(),
                     commit_id: None,
                 }),
-                version: Some(pi.version),
+                version: pi.version,
             }));
         self.package_map.insert(package_information, result_set_id);
         result_set_id
@@ -126,7 +126,7 @@ impl LsifManager<'_> {
         let line_index = self.db.line_index(file_id);
         let line_index = LineIndex {
             index: line_index,
-            encoding: OffsetEncoding::Utf16,
+            encoding: PositionEncoding::Utf16,
             endings: LineEndings::Unix,
         };
         let range_id = self.add_vertex(lsif::Vertex::Range {
@@ -248,7 +248,7 @@ impl LsifManager<'_> {
         let line_index = self.db.line_index(file_id);
         let line_index = LineIndex {
             index: line_index,
-            encoding: OffsetEncoding::Utf16,
+            encoding: PositionEncoding::Utf16,
             endings: LineEndings::Unix,
         };
         let result = folds
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs
index 8b77ccde0..9edd045ab 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs
@@ -5,7 +5,7 @@ use std::{
     time::Instant,
 };
 
-use crate::line_index::{LineEndings, LineIndex, OffsetEncoding};
+use crate::line_index::{LineEndings, LineIndex, PositionEncoding};
 use hir::Name;
 use ide::{
     LineCol, MonikerDescriptorKind, StaticIndex, StaticIndexedFile, TextRange, TokenId,
@@ -47,30 +47,27 @@ impl flags::Scip {
 
         let si = StaticIndex::compute(&analysis);
 
-        let mut index = scip_types::Index {
-            metadata: Some(scip_types::Metadata {
-                version: scip_types::ProtocolVersion::UnspecifiedProtocolVersion.into(),
-                tool_info: Some(scip_types::ToolInfo {
-                    name: "rust-analyzer".to_owned(),
-                    version: "0.1".to_owned(),
-                    arguments: vec![],
-                    ..Default::default()
-                })
-                .into(),
-                project_root: format!(
-                    "file://{}",
-                    path.normalize()
-                        .as_os_str()
-                        .to_str()
-                        .ok_or(anyhow::anyhow!("Unable to normalize project_root path"))?
-                        .to_string()
-                ),
-                text_document_encoding: scip_types::TextEncoding::UTF8.into(),
-                ..Default::default()
+        let metadata = scip_types::Metadata {
+            version: scip_types::ProtocolVersion::UnspecifiedProtocolVersion.into(),
+            tool_info: Some(scip_types::ToolInfo {
+                name: "rust-analyzer".to_owned(),
+                version: "0.1".to_owned(),
+                arguments: vec![],
+                special_fields: Default::default(),
             })
             .into(),
-            ..Default::default()
+            project_root: format!(
+                "file://{}",
+                path.normalize()
+                    .as_os_str()
+                    .to_str()
+                    .ok_or(anyhow::anyhow!("Unable to normalize project_root path"))?
+                    .to_string()
+            ),
+            text_document_encoding: scip_types::TextEncoding::UTF8.into(),
+            special_fields: Default::default(),
         };
+        let mut documents = Vec::new();
 
         let mut symbols_emitted: HashSet<TokenId> = HashSet::default();
         let mut tokens_to_symbol: HashMap<TokenId, String> = HashMap::new();
@@ -91,22 +88,18 @@ impl flags::Scip {
 
             let line_index = LineIndex {
                 index: db.line_index(file_id),
-                encoding: OffsetEncoding::Utf8,
+                encoding: PositionEncoding::Utf8,
                 endings: LineEndings::Unix,
             };
 
-            let mut doc = scip_types::Document {
-                relative_path,
-                language: "rust".to_string(),
-                ..Default::default()
-            };
+            let mut occurrences = Vec::new();
+            let mut symbols = Vec::new();
 
-            tokens.into_iter().for_each(|(range, id)| {
+            tokens.into_iter().for_each(|(text_range, id)| {
                 let token = si.tokens.get(id).unwrap();
 
-                let mut occurrence = scip_types::Occurrence::default();
-                occurrence.range = text_range_to_scip_range(&line_index, range);
-                occurrence.symbol = tokens_to_symbol
+                let range = text_range_to_scip_range(&line_index, text_range);
+                let symbol = tokens_to_symbol
                     .entry(id)
                     .or_insert_with(|| {
                         let symbol = token_to_symbol(&token).unwrap_or_else(&mut new_local_symbol);
@@ -114,34 +107,62 @@ impl flags::Scip {
                     })
                     .clone();
 
+                let mut symbol_roles = Default::default();
+
                 if let Some(def) = token.definition {
-                    if def.range == range {
-                        occurrence.symbol_roles |= scip_types::SymbolRole::Definition as i32;
+                    if def.range == text_range {
+                        symbol_roles |= scip_types::SymbolRole::Definition as i32;
                     }
 
                     if symbols_emitted.insert(id) {
-                        let mut symbol_info = scip_types::SymbolInformation::default();
-                        symbol_info.symbol = occurrence.symbol.clone();
-                        if let Some(hover) = &token.hover {
-                            if !hover.markup.as_str().is_empty() {
-                                symbol_info.documentation = vec![hover.markup.as_str().to_string()];
-                            }
-                        }
-
-                        doc.symbols.push(symbol_info)
+                        let documentation = token
+                            .hover
+                            .as_ref()
+                            .map(|hover| hover.markup.as_str())
+                            .filter(|it| !it.is_empty())
+                            .map(|it| vec![it.to_owned()]);
+                        let symbol_info = scip_types::SymbolInformation {
+                            symbol: symbol.clone(),
+                            documentation: documentation.unwrap_or_default(),
+                            relationships: Vec::new(),
+                            special_fields: Default::default(),
+                        };
+
+                        symbols.push(symbol_info)
                     }
                 }
 
-                doc.occurrences.push(occurrence);
+                occurrences.push(scip_types::Occurrence {
+                    range,
+                    symbol,
+                    symbol_roles,
+                    override_documentation: Vec::new(),
+                    syntax_kind: Default::default(),
+                    diagnostics: Vec::new(),
+                    special_fields: Default::default(),
+                });
             });
 
-            if doc.occurrences.is_empty() {
+            if occurrences.is_empty() {
                 continue;
             }
 
-            index.documents.push(doc);
+            documents.push(scip_types::Document {
+                relative_path,
+                language: "rust".to_string(),
+                occurrences,
+                symbols,
+                special_fields: Default::default(),
+            });
         }
 
+        let index = scip_types::Index {
+            metadata: Some(metadata).into(),
+            documents,
+            external_symbols: Vec::new(),
+            special_fields: Default::default(),
+        };
+
         scip::write_message_to_file("index.scip", index)
             .map_err(|err| anyhow::anyhow!("Failed to write scip to file: {}", err))?;
 
@@ -181,7 +202,7 @@ fn new_descriptor_str(
         name: name.to_string(),
         disambiguator: "".to_string(),
         suffix: suffix.into(),
-        ..Default::default()
+        special_fields: Default::default(),
     }
 }
 
@@ -231,12 +252,12 @@ fn token_to_symbol(token: &TokenStaticData) -> Option<scip_types::Symbol> {
         package: Some(scip_types::Package {
             manager: "cargo".to_string(),
             name: package_name,
-            version,
-            ..Default::default()
+            version: version.unwrap_or_else(|| ".".to_string()),
+            special_fields: Default::default(),
         })
         .into(),
         descriptors,
-        ..Default::default()
+        special_fields: Default::default(),
     })
 }
 
@@ -415,4 +436,42 @@ pub mod module {
             "",
         );
     }
+
+    #[test]
+    fn global_symbol_for_pub_struct() {
+        check_symbol(
+            r#"
+    //- /lib.rs crate:main
+    mod foo;
+
+    fn main() {
+        let _bar = foo::Bar { i: 0 };
+    }
+    //- /foo.rs
+    pub struct Bar$0 {
+        pub i: i32,
+    }
+    "#,
+            "rust-analyzer cargo main . foo/Bar#",
+        );
+    }
+
+    #[test]
+    fn global_symbol_for_pub_struct_reference() {
+        check_symbol(
+            r#"
+    //- /lib.rs crate:main
+    mod foo;
+
+    fn main() {
+        let _bar = foo::Bar$0 { i: 0 };
+    }
+    //- /foo.rs
+    pub struct Bar {
+        pub i: i32,
+    }
+    "#,
+            "rust-analyzer cargo main . foo/Bar#",
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs
index 85322f12a..6b2f22faa 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs
@@ -32,7 +32,7 @@ use vfs::AbsPathBuf;
 use crate::{
     caps::completion_item_edit_resolve,
     diagnostics::DiagnosticsMapConfig,
-    line_index::OffsetEncoding,
+    line_index::PositionEncoding,
     lsp_ext::{self, supports_utf8, WorkspaceSymbolSearchKind, WorkspaceSymbolSearchScope},
 };
 
@@ -56,6 +56,9 @@ mod patch_old_style;
 // parsing the old name.
 config_data! {
     struct ConfigData {
+        /// Whether to insert #[must_use] when generating `as_` methods
+        /// for enum variants.
+        assist_emitMustUse: bool               = "false",
         /// Placeholder expression to use for missing expressions in assists.
         assist_expressionFillDefault: ExprFillDefaultDef              = "\"todo\"",
 
@@ -115,9 +118,11 @@ config_data! {
         /// This option does not take effect until rust-analyzer is restarted.
         cargo_sysroot: Option<String>    = "\"discover\"",
         /// Compilation target override (target triple).
+        // FIXME(@poliorcetics): move to multiple targets here too, but this will need more work
+        // than `checkOnSave_target`
         cargo_target: Option<String>     = "null",
         /// Unsets `#[cfg(test)]` for the specified crates.
-        cargo_unsetTest: Vec<String>   = "[\"core\"]",
+        cargo_unsetTest: Vec<String>     = "[\"core\"]",
 
         /// Check all targets and tests (`--all-targets`).
         checkOnSave_allTargets: bool                     = "true",
@@ -154,7 +159,7 @@ config_data! {
         checkOnSave_noDefaultFeatures: Option<bool>      = "null",
         /// Override the command rust-analyzer uses instead of `cargo check` for
         /// diagnostics on save. The command is required to output json and
-        /// should therefor include `--message-format=json` or a similar option.
+        /// should therefore include `--message-format=json` or a similar option.
         ///
         /// If you're changing this because you're using some tool wrapping
         /// Cargo, you might also want to change
@@ -171,9 +176,13 @@ config_data! {
         /// ```
         /// .
         checkOnSave_overrideCommand: Option<Vec<String>> = "null",
-        /// Check for a specific target. Defaults to
-        /// `#rust-analyzer.cargo.target#`.
-        checkOnSave_target: Option<String>               = "null",
+        /// Check for specific targets. Defaults to `#rust-analyzer.cargo.target#` if empty.
+        ///
+        /// Can be a single target, e.g. `"x86_64-unknown-linux-gnu"` or a list of targets, e.g.
+        /// `["aarch64-apple-darwin", "x86_64-apple-darwin"]`.
+        ///
+        /// Aliased as `"checkOnSave.targets"`.
+        checkOnSave_target | checkOnSave_targets: CheckOnSaveTargets           = "[]",
 
         /// Toggles the additional completions that automatically add imports when completed.
         /// Note that your client must specify the `additionalTextEdits` LSP client capability to truly have this feature enabled.
@@ -258,6 +267,7 @@ config_data! {
         files_excludeDirs: Vec<PathBuf> = "[]",
         /// Controls file watching implementation.
         files_watcher: FilesWatcherDef = "\"client\"",
+
         /// Enables highlighting of related references while the cursor is on `break`, `loop`, `while`, or `for` keywords.
         highlightRelated_breakPoints_enable: bool = "true",
         /// Enables highlighting of all exit points while the cursor is on any `return`, `?`, `fn`, or return type arrow (`->`).
@@ -317,6 +327,8 @@ config_data! {
         inlayHints_closingBraceHints_minLines: usize               = "25",
         /// Whether to show inlay type hints for return types of closures.
         inlayHints_closureReturnTypeHints_enable: ClosureReturnTypeHintsDef  = "\"never\"",
+        /// Whether to show inlay hints for type adjustments.
+        inlayHints_expressionAdjustmentHints_enable: AdjustmentHintsDef = "\"never\"",
         /// Whether to show inlay type hints for elided lifetimes in function signatures.
         inlayHints_lifetimeElisionHints_enable: LifetimeElisionDef = "\"never\"",
         /// Whether to prefer using parameter names as the name for elided lifetime hints if possible.
@@ -326,7 +338,8 @@ config_data! {
         /// Whether to show function parameter name inlay hints at the call
         /// site.
         inlayHints_parameterHints_enable: bool                     = "true",
-        /// Whether to show inlay type hints for compiler inserted reborrows.
+        /// Whether to show inlay hints for compiler inserted reborrows.
+        /// This setting is deprecated in favor of #rust-analyzer.inlayHints.expressionAdjustmentHints.enable#.
         inlayHints_reborrowHints_enable: ReborrowHintsDef          = "\"never\"",
         /// Whether to render leading colons for type hints, and trailing colons for parameter hints.
         inlayHints_renderColons: bool                              = "true",
@@ -948,11 +961,11 @@ impl Config {
         .is_some()
     }
 
-    pub fn offset_encoding(&self) -> OffsetEncoding {
+    pub fn position_encoding(&self) -> PositionEncoding {
         if supports_utf8(&self.caps) {
-            OffsetEncoding::Utf8
+            PositionEncoding::Utf8
         } else {
-            OffsetEncoding::Utf16
+            PositionEncoding::Utf16
         }
     }
 
@@ -1140,11 +1153,10 @@ impl Config {
             }
             Some(_) | None => FlycheckConfig::CargoCommand {
                 command: self.data.checkOnSave_command.clone(),
-                target_triple: self
-                    .data
-                    .checkOnSave_target
-                    .clone()
-                    .or_else(|| self.data.cargo_target.clone()),
+                target_triples: match &self.data.checkOnSave_target.0[..] {
+                    [] => self.data.cargo_target.clone().into_iter().collect(),
+                    targets => targets.into(),
+                },
                 all_targets: self.data.checkOnSave_allTargets,
                 no_default_features: self
                     .data
@@ -1197,10 +1209,15 @@ impl Config {
             hide_closure_initialization_hints: self
                 .data
                 .inlayHints_typeHints_hideClosureInitialization,
-            reborrow_hints: match self.data.inlayHints_reborrowHints_enable {
-                ReborrowHintsDef::Always => ide::ReborrowHints::Always,
-                ReborrowHintsDef::Never => ide::ReborrowHints::Never,
-                ReborrowHintsDef::Mutable => ide::ReborrowHints::MutableOnly,
+            adjustment_hints: match self.data.inlayHints_expressionAdjustmentHints_enable {
+                AdjustmentHintsDef::Always => ide::AdjustmentHints::Always,
+                AdjustmentHintsDef::Never => match self.data.inlayHints_reborrowHints_enable {
+                    ReborrowHintsDef::Always | ReborrowHintsDef::Mutable => {
+                        ide::AdjustmentHints::ReborrowOnly
+                    }
+                    ReborrowHintsDef::Never => ide::AdjustmentHints::Never,
+                },
+                AdjustmentHintsDef::Reborrow => ide::AdjustmentHints::ReborrowOnly,
             },
             binding_mode_hints: self.data.inlayHints_bindingModeHints_enable,
             param_names_for_lifetime_elision_hints: self
@@ -1276,6 +1293,7 @@ impl Config {
             allowed: None,
             insert_use: self.insert_use_config(),
             prefer_no_std: self.data.imports_prefer_no_std,
+            assist_emit_must_use: self.data.assist_emitMustUse,
         }
     }
 
@@ -1534,6 +1552,7 @@ mod de_unit_v {
     named_unit_variant!(all);
     named_unit_variant!(skip_trivial);
     named_unit_variant!(mutable);
+    named_unit_variant!(reborrow);
     named_unit_variant!(with_block);
 }
 
@@ -1644,6 +1663,9 @@ enum InvocationStrategy {
 }
 
 #[derive(Deserialize, Debug, Clone)]
+struct CheckOnSaveTargets(#[serde(deserialize_with = "single_or_array")] Vec<String>);
+
+#[derive(Deserialize, Debug, Clone)]
 #[serde(rename_all = "snake_case")]
 enum InvocationLocation {
     Root,
@@ -1684,6 +1706,17 @@ enum ReborrowHintsDef {
 }
 
 #[derive(Deserialize, Debug, Clone)]
+#[serde(untagged)]
+enum AdjustmentHintsDef {
+    #[serde(deserialize_with = "true_or_always")]
+    Always,
+    #[serde(deserialize_with = "false_or_never")]
+    Never,
+    #[serde(deserialize_with = "de_unit_v::reborrow")]
+    Reborrow,
+}
+
+#[derive(Deserialize, Debug, Clone)]
 #[serde(rename_all = "snake_case")]
 enum FilesWatcherDef {
     Client,
@@ -1992,6 +2025,19 @@ fn field_props(field: &str, ty: &str, doc: &[&str], default: &str) -> serde_json
                 "Only show mutable reborrow hints."
             ]
         },
+        "AdjustmentHintsDef" => set! {
+            "type": "string",
+            "enum": [
+                "always",
+                "never",
+                "reborrow"
+            ],
+            "enumDescriptions": [
+                "Always show all adjustment hints.",
+                "Never show adjustment hints.",
+                "Only show auto borrow and dereference adjustment hints."
+            ]
+        },
         "CargoFeaturesDef" => set! {
             "anyOf": [
                 {
@@ -2080,6 +2126,17 @@ fn field_props(field: &str, ty: &str, doc: &[&str], default: &str) -> serde_json
                 "The command will be executed in the project root."
             ],
         },
+        "CheckOnSaveTargets" => set! {
+            "anyOf": [
+                {
+                    "type": "string",
+                },
+                {
+                    "type": "array",
+                    "items": { "type": "string" }
+                },
+            ],
+        },
         _ => panic!("missing entry for {}: {}", ty, default),
     }
 
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/diagnostics/to_proto.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/diagnostics/to_proto.rs
index 74689fd87..beb23c54c 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/diagnostics/to_proto.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/diagnostics/to_proto.rs
@@ -8,7 +8,7 @@ use stdx::format_to;
 use vfs::{AbsPath, AbsPathBuf};
 
 use crate::{
-    global_state::GlobalStateSnapshot, line_index::OffsetEncoding, lsp_ext,
+    global_state::GlobalStateSnapshot, line_index::PositionEncoding, lsp_ext,
     to_proto::url_from_abs_path,
 };
 
@@ -66,17 +66,17 @@ fn location(
     let uri = url_from_abs_path(&file_name);
 
     let range = {
-        let offset_encoding = snap.config.offset_encoding();
+        let position_encoding = snap.config.position_encoding();
         lsp_types::Range::new(
-            position(&offset_encoding, span, span.line_start, span.column_start),
-            position(&offset_encoding, span, span.line_end, span.column_end),
+            position(&position_encoding, span, span.line_start, span.column_start),
+            position(&position_encoding, span, span.line_end, span.column_end),
         )
     };
     lsp_types::Location::new(uri, range)
 }
 
 fn position(
-    offset_encoding: &OffsetEncoding,
+    position_encoding: &PositionEncoding,
     span: &DiagnosticSpan,
     line_offset: usize,
     column_offset: usize,
@@ -93,9 +93,9 @@ fn position(
             };
         }
         let mut char_offset = 0;
-        let len_func = match offset_encoding {
-            OffsetEncoding::Utf8 => char::len_utf8,
-            OffsetEncoding::Utf16 => char::len_utf16,
+        let len_func = match position_encoding {
+            PositionEncoding::Utf8 => char::len_utf8,
+            PositionEncoding::Utf16 => char::len_utf16,
         };
         for c in line.text.chars() {
             char_offset += 1;
@@ -359,14 +359,15 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
         .iter()
         .flat_map(|primary_span| {
             let primary_location = primary_location(config, workspace_root, primary_span, snap);
-
-            let mut message = message.clone();
-            if needs_primary_span_label {
-                if let Some(primary_span_label) = &primary_span.label {
-                    format_to!(message, "\n{}", primary_span_label);
+            let message = {
+                let mut message = message.clone();
+                if needs_primary_span_label {
+                    if let Some(primary_span_label) = &primary_span.label {
+                        format_to!(message, "\n{}", primary_span_label);
+                    }
                 }
-            }
-
+                message
+            };
             // Each primary diagnostic span may result in multiple LSP diagnostics.
             let mut diagnostics = Vec::new();
 
@@ -417,7 +418,7 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
                     message: message.clone(),
                     related_information: Some(information_for_additional_diagnostic),
                     tags: if tags.is_empty() { None } else { Some(tags.clone()) },
-                    data: None,
+                    data: Some(serde_json::json!({ "rendered": rd.rendered })),
                 };
                 diagnostics.push(MappedRustDiagnostic {
                     url: secondary_location.uri,
@@ -449,7 +450,7 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
                         }
                     },
                     tags: if tags.is_empty() { None } else { Some(tags.clone()) },
-                    data: None,
+                    data: Some(serde_json::json!({ "rendered": rd.rendered })),
                 },
                 fix: None,
             });
@@ -534,7 +535,8 @@ mod tests {
             Config::new(workspace_root.to_path_buf(), ClientCapabilities::default()),
         );
         let snap = state.snapshot();
-        let actual = map_rust_diagnostic_to_lsp(&config, &diagnostic, workspace_root, &snap);
+        let mut actual = map_rust_diagnostic_to_lsp(&config, &diagnostic, workspace_root, &snap);
+        actual.iter_mut().for_each(|diag| diag.diagnostic.data = None);
         expect.assert_debug_eq(&actual)
     }
 
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/from_proto.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/from_proto.rs
index f2db9a273..dd433b0f4 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/from_proto.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/from_proto.rs
@@ -8,7 +8,7 @@ use vfs::AbsPathBuf;
 use crate::{
     from_json,
     global_state::GlobalStateSnapshot,
-    line_index::{LineIndex, OffsetEncoding},
+    line_index::{LineIndex, PositionEncoding},
     lsp_ext,
     lsp_utils::invalid_params_error,
     Result,
@@ -25,10 +25,10 @@ pub(crate) fn vfs_path(url: &lsp_types::Url) -> Result<vfs::VfsPath> {
 
 pub(crate) fn offset(line_index: &LineIndex, position: lsp_types::Position) -> Result<TextSize> {
     let line_col = match line_index.encoding {
-        OffsetEncoding::Utf8 => {
+        PositionEncoding::Utf8 => {
             LineCol { line: position.line as u32, col: position.character as u32 }
         }
-        OffsetEncoding::Utf16 => {
+        PositionEncoding::Utf16 => {
             let line_col =
                 LineColUtf16 { line: position.line as u32, col: position.character as u32 };
             line_index.index.to_utf8(line_col)
@@ -42,8 +42,10 @@ pub(crate) fn offset(line_index: &LineIndex, position: lsp_types::Position) -> R
 pub(crate) fn text_range(line_index: &LineIndex, range: lsp_types::Range) -> Result<TextRange> {
     let start = offset(line_index, range.start)?;
     let end = offset(line_index, range.end)?;
-    let text_range = TextRange::new(start, end);
-    Ok(text_range)
+    match end < start {
+        true => Err(format_err!("Invalid Range").into()),
+        false => Ok(TextRange::new(start, end)),
+    }
 }
 
 pub(crate) fn file_id(snap: &GlobalStateSnapshot, url: &lsp_types::Url) -> Result<FileId> {
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs
index 3fb06c31f..4e8bc8d64 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs
@@ -100,7 +100,7 @@ pub(crate) struct GlobalState {
     /// the user just adds comments or whitespace to Cargo.toml, we do not want
     /// to invalidate any salsa caches.
     pub(crate) workspaces: Arc<Vec<ProjectWorkspace>>,
-    pub(crate) fetch_workspaces_queue: OpQueue<Vec<anyhow::Result<ProjectWorkspace>>>,
+    pub(crate) fetch_workspaces_queue: OpQueue<Option<Vec<anyhow::Result<ProjectWorkspace>>>>,
     pub(crate) fetch_build_data_queue:
         OpQueue<(Arc<Vec<ProjectWorkspace>>, Vec<anyhow::Result<WorkspaceBuildScripts>>)>,
 
@@ -383,7 +383,7 @@ impl GlobalStateSnapshot {
     pub(crate) fn file_line_index(&self, file_id: FileId) -> Cancellable<LineIndex> {
         let endings = self.vfs.read().1[&file_id];
         let index = self.analysis.file_line_index(file_id)?;
-        let res = LineIndex { index, endings, encoding: self.config.offset_encoding() };
+        let res = LineIndex { index, endings, encoding: self.config.position_encoding() };
         Ok(res)
     }
 
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers.rs
index 34795a8eb..d190a9f4e 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers.rs
@@ -9,9 +9,9 @@ use std::{
 
 use anyhow::Context;
 use ide::{
-    AnnotationConfig, AssistKind, AssistResolveStrategy, FileId, FilePosition, FileRange,
-    HoverAction, HoverGotoTypeData, Query, RangeInfo, ReferenceCategory, Runnable, RunnableKind,
-    SingleResolve, SourceChange, TextEdit,
+    AnnotationConfig, AssistKind, AssistResolveStrategy, Cancellable, FileId, FilePosition,
+    FileRange, HoverAction, HoverGotoTypeData, Query, RangeInfo, ReferenceCategory, Runnable,
+    RunnableKind, SingleResolve, SourceChange, TextEdit,
 };
 use ide_db::SymbolKind;
 use lsp_server::ErrorCode;
@@ -556,7 +556,7 @@ pub(crate) fn handle_will_rename_files(
     if source_change.source_file_edits.is_empty() {
         Ok(None)
     } else {
-        to_proto::workspace_edit(&snap, source_change).map(Some)
+        Ok(Some(to_proto::workspace_edit(&snap, source_change)?))
     }
 }
 
@@ -1313,7 +1313,7 @@ pub(crate) fn handle_ssr(
         position,
         selections,
     )??;
-    to_proto::workspace_edit(&snap, source_change)
+    to_proto::workspace_edit(&snap, source_change).map_err(Into::into)
 }
 
 pub(crate) fn publish_diagnostics(
@@ -1354,13 +1354,12 @@ pub(crate) fn handle_inlay_hints(
 ) -> Result<Option<Vec<InlayHint>>> {
     let _p = profile::span("handle_inlay_hints");
     let document_uri = &params.text_document.uri;
-    let file_id = from_proto::file_id(&snap, document_uri)?;
-    let line_index = snap.file_line_index(file_id)?;
-    let range = from_proto::file_range(
+    let FileRange { file_id, range } = from_proto::file_range(
         &snap,
         TextDocumentIdentifier::new(document_uri.to_owned()),
         params.range,
     )?;
+    let line_index = snap.file_line_index(file_id)?;
     let inlay_hints_config = snap.config.inlay_hints();
     Ok(Some(
         snap.analysis
@@ -1369,7 +1368,7 @@ pub(crate) fn handle_inlay_hints(
             .map(|it| {
                 to_proto::inlay_hint(&snap, &line_index, inlay_hints_config.render_colons, it)
             })
-            .collect::<Result<Vec<_>>>()?,
+            .collect::<Cancellable<Vec<_>>>()?,
     ))
 }
 
@@ -1426,7 +1425,7 @@ pub(crate) fn handle_call_hierarchy_prepare(
         .into_iter()
         .filter(|it| it.kind == Some(SymbolKind::Function))
         .map(|it| to_proto::call_hierarchy_item(&snap, it))
-        .collect::<Result<Vec<_>>>()?;
+        .collect::<Cancellable<Vec<_>>>()?;
 
     Ok(Some(res))
 }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/line_index.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/line_index.rs
index c116414da..2945dba12 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/line_index.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/line_index.rs
@@ -7,7 +7,7 @@
 
 use std::sync::Arc;
 
-pub enum OffsetEncoding {
+pub enum PositionEncoding {
     Utf8,
     Utf16,
 }
@@ -15,7 +15,7 @@ pub enum OffsetEncoding {
 pub(crate) struct LineIndex {
     pub(crate) index: Arc<ide::LineIndex>,
     pub(crate) endings: LineEndings,
-    pub(crate) encoding: OffsetEncoding,
+    pub(crate) encoding: PositionEncoding,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -27,10 +27,6 @@ pub(crate) enum LineEndings {
 impl LineEndings {
     /// Replaces `\r\n` with `\n` in-place in `src`.
     pub(crate) fn normalize(src: String) -> (String, LineEndings) {
-        if !src.as_bytes().contains(&b'\r') {
-            return (src, LineEndings::Unix);
-        }
-
         // We replace `\r\n` with `\n` in-place, which doesn't break utf-8 encoding.
         // While we *can* call `as_mut_vec` and do surgery on the live string
         // directly, let's rather steal the contents of `src`. This makes the code
@@ -39,10 +35,19 @@ impl LineEndings {
         let mut buf = src.into_bytes();
         let mut gap_len = 0;
         let mut tail = buf.as_mut_slice();
+        let mut crlf_seen = false;
+
+        let find_crlf = |src: &[u8]| src.windows(2).position(|it| it == b"\r\n");
+
         loop {
             let idx = match find_crlf(&tail[gap_len..]) {
-                None => tail.len(),
-                Some(idx) => idx + gap_len,
+                None if crlf_seen => tail.len(),
+                // SAFETY: buf is unchanged and therefore still contains utf8 data
+                None => return (unsafe { String::from_utf8_unchecked(buf) }, LineEndings::Unix),
+                Some(idx) => {
+                    crlf_seen = true;
+                    idx + gap_len
+                }
             };
             tail.copy_within(gap_len..idx, 0);
             tail = &mut tail[idx - gap_len..];
@@ -54,15 +59,48 @@ impl LineEndings {
 
         // Account for removed `\r`.
         // After `set_len`, `buf` is guaranteed to contain utf-8 again.
-        let new_len = buf.len() - gap_len;
         let src = unsafe {
+            let new_len = buf.len() - gap_len;
             buf.set_len(new_len);
             String::from_utf8_unchecked(buf)
         };
-        return (src, LineEndings::Dos);
+        (src, LineEndings::Dos)
+    }
+}
 
-        fn find_crlf(src: &[u8]) -> Option<usize> {
-            src.windows(2).position(|it| it == b"\r\n")
-        }
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn unix() {
+        let src = "a\nb\nc\n\n\n\n";
+        let (res, endings) = LineEndings::normalize(src.into());
+        assert_eq!(endings, LineEndings::Unix);
+        assert_eq!(res, src);
+    }
+
+    #[test]
+    fn dos() {
+        let src = "\r\na\r\n\r\nb\r\nc\r\n\r\n\r\n\r\n";
+        let (res, endings) = LineEndings::normalize(src.into());
+        assert_eq!(endings, LineEndings::Dos);
+        assert_eq!(res, "\na\n\nb\nc\n\n\n\n");
+    }
+
+    #[test]
+    fn mixed() {
+        let src = "a\r\nb\r\nc\r\n\n\r\n\n";
+        let (res, endings) = LineEndings::normalize(src.into());
+        assert_eq!(endings, LineEndings::Dos);
+        assert_eq!(res, "a\nb\nc\n\n\n\n");
+    }
+
+    #[test]
+    fn none() {
+        let src = "abc";
+        let (res, endings) = LineEndings::normalize(src.into());
+        assert_eq!(endings, LineEndings::Unix);
+        assert_eq!(res, src);
     }
 }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_ext.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_ext.rs
index e61c8b643..8cc5648f3 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_ext.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_ext.rs
@@ -3,6 +3,7 @@
 use std::{collections::HashMap, path::PathBuf};
 
 use lsp_types::request::Request;
+use lsp_types::PositionEncodingKind;
 use lsp_types::{
     notification::Notification, CodeActionKind, DocumentOnTypeFormattingParams,
     PartialResultParams, Position, Range, TextDocumentIdentifier, WorkDoneProgressParams,
@@ -455,7 +456,15 @@ pub(crate) enum CodeLensResolveData {
 }
 
 pub fn supports_utf8(caps: &lsp_types::ClientCapabilities) -> bool {
-    caps.offset_encoding.as_deref().unwrap_or_default().iter().any(|it| it == "utf-8")
+    match &caps.general {
+        Some(general) => general
+            .position_encodings
+            .as_deref()
+            .unwrap_or_default()
+            .iter()
+            .any(|it| it == &PositionEncodingKind::UTF8),
+        _ => false,
+    }
 }
 
 pub enum MoveItem {}
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_utils.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_utils.rs
index b3cea64d4..0971dc36f 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_utils.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp_utils.rs
@@ -1,12 +1,12 @@
 //! Utilities for LSP-related boilerplate code.
-use std::{ops::Range, sync::Arc};
+use std::{mem, ops::Range, sync::Arc};
 
 use lsp_server::Notification;
 
 use crate::{
     from_proto,
     global_state::GlobalState,
-    line_index::{LineEndings, LineIndex, OffsetEncoding},
+    line_index::{LineEndings, LineIndex, PositionEncoding},
     LspError,
 };
 
@@ -133,14 +133,40 @@ impl GlobalState {
 }
 
 pub(crate) fn apply_document_changes(
-    old_text: &mut String,
-    content_changes: Vec<lsp_types::TextDocumentContentChangeEvent>,
-) {
+    file_contents: impl FnOnce() -> String,
+    mut content_changes: Vec<lsp_types::TextDocumentContentChangeEvent>,
+) -> String {
+    // Skip to the last full document change, as it invalidates all previous changes anyways.
+    let mut start = content_changes
+        .iter()
+        .rev()
+        .position(|change| change.range.is_none())
+        .map(|idx| content_changes.len() - idx - 1)
+        .unwrap_or(0);
+
+    let mut text: String = match content_changes.get_mut(start) {
+        // peek at the first content change as an optimization
+        Some(lsp_types::TextDocumentContentChangeEvent { range: None, text, .. }) => {
+            let text = mem::take(text);
+            start += 1;
+
+            // The only change is a full document update
+            if start == content_changes.len() {
+                return text;
+            }
+            text
+        }
+        Some(_) => file_contents(),
+        // we received no content changes
+        None => return file_contents(),
+    };
+
     let mut line_index = LineIndex {
-        index: Arc::new(ide::LineIndex::new(old_text)),
+        // the index will be overwritten in the bottom loop's first iteration
+        index: Arc::new(ide::LineIndex::new(&text)),
         // We don't care about line endings or offset encoding here.
         endings: LineEndings::Unix,
-        encoding: OffsetEncoding::Utf16,
+        encoding: PositionEncoding::Utf16,
     };
 
     // The changes we got must be applied sequentially, but can cross lines so we
@@ -148,38 +174,20 @@ pub(crate) fn apply_document_changes(
     // Some clients (e.g. Code) sort the ranges in reverse. As an optimization, we
     // remember the last valid line in the index and only rebuild it if needed.
     // The VFS will normalize the end of lines to `\n`.
-    enum IndexValid {
-        All,
-        UpToLineExclusive(u32),
-    }
-
-    impl IndexValid {
-        fn covers(&self, line: u32) -> bool {
-            match *self {
-                IndexValid::UpToLineExclusive(to) => to > line,
-                _ => true,
-            }
-        }
-    }
-
-    let mut index_valid = IndexValid::All;
+    let mut index_valid = !0u32;
     for change in content_changes {
-        match change.range {
-            Some(range) => {
-                if !index_valid.covers(range.end.line) {
-                    line_index.index = Arc::new(ide::LineIndex::new(old_text));
-                }
-                index_valid = IndexValid::UpToLineExclusive(range.start.line);
-                if let Ok(range) = from_proto::text_range(&line_index, range) {
-                    old_text.replace_range(Range::<usize>::from(range), &change.text);
-                }
+        // The None case can't happen as we have handled it above already
+        if let Some(range) = change.range {
+            if index_valid <= range.end.line {
+                *Arc::make_mut(&mut line_index.index) = ide::LineIndex::new(&text);
             }
-            None => {
-                *old_text = change.text;
-                index_valid = IndexValid::UpToLineExclusive(0);
+            index_valid = range.start.line;
+            if let Ok(range) = from_proto::text_range(&line_index, range) {
+                text.replace_range(Range::<usize>::from(range), &change.text);
             }
         }
     }
+    text
 }
 
 /// Checks that the edits inside the completion and the additional edits do not overlap.
@@ -242,11 +250,10 @@ mod tests {
             };
         }
 
-        let mut text = String::new();
-        apply_document_changes(&mut text, vec![]);
+        let text = apply_document_changes(|| String::new(), vec![]);
         assert_eq!(text, "");
-        apply_document_changes(
-            &mut text,
+        let text = apply_document_changes(
+            || text,
             vec![TextDocumentContentChangeEvent {
                 range: None,
                 range_length: None,
@@ -254,39 +261,39 @@ mod tests {
             }],
         );
         assert_eq!(text, "the");
-        apply_document_changes(&mut text, c![0, 3; 0, 3 => " quick"]);
+        let text = apply_document_changes(|| text, c![0, 3; 0, 3 => " quick"]);
         assert_eq!(text, "the quick");
-        apply_document_changes(&mut text, c![0, 0; 0, 4 => "", 0, 5; 0, 5 => " foxes"]);
+        let text = apply_document_changes(|| text, c![0, 0; 0, 4 => "", 0, 5; 0, 5 => " foxes"]);
         assert_eq!(text, "quick foxes");
-        apply_document_changes(&mut text, c![0, 11; 0, 11 => "\ndream"]);
+        let text = apply_document_changes(|| text, c![0, 11; 0, 11 => "\ndream"]);
         assert_eq!(text, "quick foxes\ndream");
-        apply_document_changes(&mut text, c![1, 0; 1, 0 => "have "]);
+        let text = apply_document_changes(|| text, c![1, 0; 1, 0 => "have "]);
         assert_eq!(text, "quick foxes\nhave dream");
-        apply_document_changes(
-            &mut text,
+        let text = apply_document_changes(
+            || text,
             c![0, 0; 0, 0 => "the ", 1, 4; 1, 4 => " quiet", 1, 16; 1, 16 => "s\n"],
         );
         assert_eq!(text, "the quick foxes\nhave quiet dreams\n");
-        apply_document_changes(&mut text, c![0, 15; 0, 15 => "\n", 2, 17; 2, 17 => "\n"]);
+        let text = apply_document_changes(|| text, c![0, 15; 0, 15 => "\n", 2, 17; 2, 17 => "\n"]);
         assert_eq!(text, "the quick foxes\n\nhave quiet dreams\n\n");
-        apply_document_changes(
-            &mut text,
+        let text = apply_document_changes(
+            || text,
             c![1, 0; 1, 0 => "DREAM", 2, 0; 2, 0 => "they ", 3, 0; 3, 0 => "DON'T THEY?"],
         );
         assert_eq!(text, "the quick foxes\nDREAM\nthey have quiet dreams\nDON'T THEY?\n");
-        apply_document_changes(&mut text, c![0, 10; 1, 5 => "", 2, 0; 2, 12 => ""]);
+        let text = apply_document_changes(|| text, c![0, 10; 1, 5 => "", 2, 0; 2, 12 => ""]);
         assert_eq!(text, "the quick \nthey have quiet dreams\n");
 
-        text = String::from("❤️");
-        apply_document_changes(&mut text, c![0, 0; 0, 0 => "a"]);
+        let text = String::from("❤️");
+        let text = apply_document_changes(|| text, c![0, 0; 0, 0 => "a"]);
         assert_eq!(text, "a❤️");
 
-        text = String::from("a\nb");
-        apply_document_changes(&mut text, c![0, 1; 1, 0 => "\nțc", 0, 1; 1, 1 => "d"]);
+        let text = String::from("a\nb");
+        let text = apply_document_changes(|| text, c![0, 1; 1, 0 => "\nțc", 0, 1; 1, 1 => "d"]);
         assert_eq!(text, "adcb");
 
-        text = String::from("a\nb");
-        apply_document_changes(&mut text, c![0, 1; 1, 0 => "ț\nc", 0, 2; 0, 2 => "c"]);
+        let text = String::from("a\nb");
+        let text = apply_document_changes(|| text, c![0, 1; 1, 0 => "ț\nc", 0, 2; 0, 2 => "c"]);
         assert_eq!(text, "ațc\ncb");
     }
 
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs
index 2c928a580..274588ce0 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs
@@ -451,7 +451,7 @@ impl GlobalState {
                     ProjectWorkspaceProgress::Begin => (Progress::Begin, None),
                     ProjectWorkspaceProgress::Report(msg) => (Progress::Report, Some(msg)),
                     ProjectWorkspaceProgress::End(workspaces) => {
-                        self.fetch_workspaces_queue.op_completed(workspaces);
+                        self.fetch_workspaces_queue.op_completed(Some(workspaces));
 
                         let old = Arc::clone(&self.workspaces);
                         self.switch_workspaces("fetched workspace".to_string());
@@ -607,30 +607,34 @@ impl GlobalState {
 
     /// Handles a request.
     fn on_request(&mut self, req: Request) {
-        if self.shutdown_requested {
-            self.respond(lsp_server::Response::new_err(
-                req.id,
-                lsp_server::ErrorCode::InvalidRequest as i32,
-                "Shutdown already requested.".to_owned(),
-            ));
-            return;
-        }
+        let mut dispatcher = RequestDispatcher { req: Some(req), global_state: self };
+        dispatcher.on_sync_mut::<lsp_types::request::Shutdown>(|s, ()| {
+            s.shutdown_requested = true;
+            Ok(())
+        });
+
+        if let RequestDispatcher { req: Some(req), global_state: this } = &mut dispatcher {
+            if this.shutdown_requested {
+                this.respond(lsp_server::Response::new_err(
+                    req.id.clone(),
+                    lsp_server::ErrorCode::InvalidRequest as i32,
+                    "Shutdown already requested.".to_owned(),
+                ));
+                return;
+            }
 
-        // Avoid flashing a bunch of unresolved references during initial load.
-        if self.workspaces.is_empty() && !self.is_quiescent() {
-            self.respond(lsp_server::Response::new_err(
-                req.id,
-                lsp_server::ErrorCode::ContentModified as i32,
-                "waiting for cargo metadata or cargo check".to_owned(),
-            ));
-            return;
+            // Avoid flashing a bunch of unresolved references during initial load.
+            if this.workspaces.is_empty() && !this.is_quiescent() {
+                this.respond(lsp_server::Response::new_err(
+                    req.id.clone(),
+                    lsp_server::ErrorCode::ContentModified as i32,
+                    "waiting for cargo metadata or cargo check".to_owned(),
+                ));
+                return;
+            }
         }
 
-        RequestDispatcher { req: Some(req), global_state: self }
-            .on_sync_mut::<lsp_types::request::Shutdown>(|s, ()| {
-                s.shutdown_requested = true;
-                Ok(())
-            })
+        dispatcher
             .on_sync_mut::<lsp_ext::ReloadWorkspace>(handlers::handle_workspace_reload)
             .on_sync_mut::<lsp_ext::MemoryUsage>(handlers::handle_memory_usage)
             .on_sync_mut::<lsp_ext::ShuffleCrateGraph>(handlers::handle_shuffle_crate_graph)
@@ -755,8 +759,10 @@ impl GlobalState {
 
                     let vfs = &mut this.vfs.write().0;
                     let file_id = vfs.file_id(&path).unwrap();
-                    let mut text = String::from_utf8(vfs.file_contents(file_id).to_vec()).unwrap();
-                    apply_document_changes(&mut text, params.content_changes);
+                    let text = apply_document_changes(
+                        || std::str::from_utf8(vfs.file_contents(file_id)).unwrap().into(),
+                        params.content_changes,
+                    );
 
                     vfs.set_file_contents(path, Some(text.into_bytes()));
                 }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/mem_docs.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/mem_docs.rs
index f86a0f66a..45a1dab97 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/mem_docs.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/mem_docs.rs
@@ -7,7 +7,7 @@ use vfs::VfsPath;
 
 /// Holds the set of in-memory documents.
 ///
-/// For these document, there true contents is maintained by the client. It
+/// For these document, their true contents is maintained by the client. It
 /// might be different from what's on disk.
 #[derive(Default, Clone)]
 pub(crate) struct MemDocs {
@@ -19,6 +19,7 @@ impl MemDocs {
     pub(crate) fn contains(&self, path: &VfsPath) -> bool {
         self.mem_docs.contains_key(path)
     }
+
     pub(crate) fn insert(&mut self, path: VfsPath, data: DocumentData) -> Result<(), ()> {
         self.added_or_removed = true;
         match self.mem_docs.insert(path, data) {
@@ -26,6 +27,7 @@ impl MemDocs {
             None => Ok(()),
         }
     }
+
     pub(crate) fn remove(&mut self, path: &VfsPath) -> Result<(), ()> {
         self.added_or_removed = true;
         match self.mem_docs.remove(path) {
@@ -33,17 +35,21 @@ impl MemDocs {
             None => Err(()),
         }
     }
+
     pub(crate) fn get(&self, path: &VfsPath) -> Option<&DocumentData> {
         self.mem_docs.get(path)
     }
+
     pub(crate) fn get_mut(&mut self, path: &VfsPath) -> Option<&mut DocumentData> {
         // NB: don't set `self.added_or_removed` here, as that purposefully only
         // tracks changes to the key set.
         self.mem_docs.get_mut(path)
     }
+
     pub(crate) fn iter(&self) -> impl Iterator<Item = &VfsPath> {
         self.mem_docs.keys()
     }
+
     pub(crate) fn take_changes(&mut self) -> bool {
         mem::replace(&mut self.added_or_removed, false)
     }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs
index e1f651786..fcfe4be0b 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs
@@ -106,6 +106,14 @@ impl GlobalState {
             status.health = lsp_ext::Health::Error;
             status.message = Some(error)
         }
+
+        if self.config.linked_projects().is_empty()
+            && self.config.detached_files().is_empty()
+            && self.config.notifications().cargo_toml_not_found
+        {
+            status.health = lsp_ext::Health::Warning;
+            status.message = Some("Workspace reload required".to_string())
+        }
         status
     }
 
@@ -198,12 +206,9 @@ impl GlobalState {
             self.show_and_log_error("failed to run build scripts".to_string(), Some(error));
         }
 
-        let workspaces = self
-            .fetch_workspaces_queue
-            .last_op_result()
-            .iter()
-            .filter_map(|res| res.as_ref().ok().cloned())
-            .collect::<Vec<_>>();
+        let Some(workspaces) = self.fetch_workspaces_queue.last_op_result() else { return; };
+        let workspaces =
+            workspaces.iter().filter_map(|res| res.as_ref().ok().cloned()).collect::<Vec<_>>();
 
         fn eq_ignore_build_data<'a>(
             left: &'a ProjectWorkspace,
@@ -300,9 +305,6 @@ impl GlobalState {
         let files_config = self.config.files();
         let project_folders = ProjectFolders::new(&self.workspaces, &files_config.exclude);
 
-        let standalone_server_name =
-            format!("rust-analyzer-proc-macro-srv{}", std::env::consts::EXE_SUFFIX);
-
         if self.proc_macro_clients.is_empty() {
             if let Some((path, path_manually_set)) = self.config.proc_macro_srv() {
                 tracing::info!("Spawning proc-macro servers");
@@ -310,40 +312,17 @@ impl GlobalState {
                     .workspaces
                     .iter()
                     .map(|ws| {
-                        let (path, args) = if path_manually_set {
+                        let (path, args): (_, &[_]) = if path_manually_set {
                             tracing::debug!(
                                 "Pro-macro server path explicitly set: {}",
                                 path.display()
                             );
-                            (path.clone(), vec![])
+                            (path.clone(), &[])
                         } else {
-                            let mut sysroot_server = None;
-                            if let ProjectWorkspace::Cargo { sysroot, .. }
-                            | ProjectWorkspace::Json { sysroot, .. } = ws
-                            {
-                                if let Some(sysroot) = sysroot.as_ref() {
-                                    let server_path = sysroot
-                                        .root()
-                                        .join("libexec")
-                                        .join(&standalone_server_name);
-                                    if std::fs::metadata(&server_path).is_ok() {
-                                        tracing::debug!(
-                                            "Sysroot proc-macro server exists at {}",
-                                            server_path.display()
-                                        );
-                                        sysroot_server = Some(server_path);
-                                    } else {
-                                        tracing::debug!(
-                                            "Sysroot proc-macro server does not exist at {}",
-                                            server_path.display()
-                                        );
-                                    }
-                                }
+                            match ws.find_sysroot_proc_macro_srv() {
+                                Some(server_path) => (server_path, &[]),
+                                None => (path.clone(), &["proc-macro"]),
                             }
-                            sysroot_server.map_or_else(
-                                || (path.clone(), vec!["proc-macro".to_owned()]),
-                                |path| (path, vec![]),
-                            )
                         };
 
                         tracing::info!(?args, "Using proc-macro server at {}", path.display(),);
@@ -427,9 +406,14 @@ impl GlobalState {
     fn fetch_workspace_error(&self) -> Result<(), String> {
         let mut buf = String::new();
 
-        for ws in self.fetch_workspaces_queue.last_op_result() {
-            if let Err(err) = ws {
-                stdx::format_to!(buf, "rust-analyzer failed to load workspace: {:#}\n", err);
+        let Some(last_op_result) = self.fetch_workspaces_queue.last_op_result() else { return Ok(()) };
+        if last_op_result.is_empty() {
+            stdx::format_to!(buf, "rust-analyzer failed to discover workspace");
+        } else {
+            for ws in last_op_result {
+                if let Err(err) = ws {
+                    stdx::format_to!(buf, "rust-analyzer failed to load workspace: {:#}\n", err);
+                }
             }
         }
 
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/to_proto.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/to_proto.rs
index 5936454a7..81cc1952b 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/to_proto.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/to_proto.rs
@@ -21,17 +21,17 @@ use crate::{
     cargo_target_spec::CargoTargetSpec,
     config::{CallInfoConfig, Config},
     global_state::GlobalStateSnapshot,
-    line_index::{LineEndings, LineIndex, OffsetEncoding},
+    line_index::{LineEndings, LineIndex, PositionEncoding},
     lsp_ext,
     lsp_utils::invalid_params_error,
-    semantic_tokens, Result,
+    semantic_tokens,
 };
 
 pub(crate) fn position(line_index: &LineIndex, offset: TextSize) -> lsp_types::Position {
     let line_col = line_index.index.line_col(offset);
     match line_index.encoding {
-        OffsetEncoding::Utf8 => lsp_types::Position::new(line_col.line, line_col.col),
-        OffsetEncoding::Utf16 => {
+        PositionEncoding::Utf8 => lsp_types::Position::new(line_col.line, line_col.col),
+        PositionEncoding::Utf16 => {
             let line_col = line_index.index.to_utf16(line_col);
             lsp_types::Position::new(line_col.line, line_col.col)
         }
@@ -429,7 +429,7 @@ pub(crate) fn inlay_hint(
     line_index: &LineIndex,
     render_colons: bool,
     mut inlay_hint: InlayHint,
-) -> Result<lsp_types::InlayHint> {
+) -> Cancellable<lsp_types::InlayHint> {
     match inlay_hint.kind {
         InlayKind::ParameterHint if render_colons => inlay_hint.label.append_str(":"),
         InlayKind::TypeHint if render_colons => inlay_hint.label.prepend_str(": "),
@@ -440,32 +440,35 @@ pub(crate) fn inlay_hint(
     Ok(lsp_types::InlayHint {
         position: match inlay_hint.kind {
             // before annotated thing
-            InlayKind::ParameterHint
-            | InlayKind::ImplicitReborrowHint
-            | InlayKind::BindingModeHint => position(line_index, inlay_hint.range.start()),
+            InlayKind::ParameterHint | InlayKind::AdjustmentHint | InlayKind::BindingModeHint => {
+                position(line_index, inlay_hint.range.start())
+            }
             // after annotated thing
             InlayKind::ClosureReturnTypeHint
             | InlayKind::TypeHint
             | InlayKind::ChainingHint
             | InlayKind::GenericParamListHint
+            | InlayKind::AdjustmentHintClosingParenthesis
             | InlayKind::LifetimeHint
             | InlayKind::ClosingBraceHint => position(line_index, inlay_hint.range.end()),
         },
         padding_left: Some(match inlay_hint.kind {
             InlayKind::TypeHint => !render_colons,
             InlayKind::ChainingHint | InlayKind::ClosingBraceHint => true,
-            InlayKind::BindingModeHint
+            InlayKind::AdjustmentHintClosingParenthesis
+            | InlayKind::BindingModeHint
             | InlayKind::ClosureReturnTypeHint
             | InlayKind::GenericParamListHint
-            | InlayKind::ImplicitReborrowHint
+            | InlayKind::AdjustmentHint
             | InlayKind::LifetimeHint
             | InlayKind::ParameterHint => false,
         }),
         padding_right: Some(match inlay_hint.kind {
-            InlayKind::ChainingHint
+            InlayKind::AdjustmentHintClosingParenthesis
+            | InlayKind::ChainingHint
             | InlayKind::ClosureReturnTypeHint
             | InlayKind::GenericParamListHint
-            | InlayKind::ImplicitReborrowHint
+            | InlayKind::AdjustmentHint
             | InlayKind::TypeHint
             | InlayKind::ClosingBraceHint => false,
             InlayKind::BindingModeHint => inlay_hint.label.as_simple_str() != Some("&"),
@@ -476,10 +479,11 @@ pub(crate) fn inlay_hint(
             InlayKind::ClosureReturnTypeHint | InlayKind::TypeHint | InlayKind::ChainingHint => {
                 Some(lsp_types::InlayHintKind::TYPE)
             }
-            InlayKind::BindingModeHint
+            InlayKind::AdjustmentHintClosingParenthesis
+            | InlayKind::BindingModeHint
             | InlayKind::GenericParamListHint
             | InlayKind::LifetimeHint
-            | InlayKind::ImplicitReborrowHint
+            | InlayKind::AdjustmentHint
             | InlayKind::ClosingBraceHint => None,
         },
         text_edits: None,
@@ -518,7 +522,7 @@ pub(crate) fn inlay_hint(
 fn inlay_hint_label(
     snap: &GlobalStateSnapshot,
     label: InlayHintLabel,
-) -> Result<lsp_types::InlayHintLabel> {
+) -> Cancellable<lsp_types::InlayHintLabel> {
     Ok(match label.as_simple_str() {
         Some(s) => lsp_types::InlayHintLabel::String(s.into()),
         None => lsp_types::InlayHintLabel::LabelParts(
@@ -536,7 +540,7 @@ fn inlay_hint_label(
                         command: None,
                     })
                 })
-                .collect::<Result<Vec<_>>>()?,
+                .collect::<Cancellable<Vec<_>>>()?,
         ),
     })
 }
@@ -794,7 +798,7 @@ pub(crate) fn optional_versioned_text_document_identifier(
 pub(crate) fn location(
     snap: &GlobalStateSnapshot,
     frange: FileRange,
-) -> Result<lsp_types::Location> {
+) -> Cancellable<lsp_types::Location> {
     let url = url(snap, frange.file_id);
     let line_index = snap.file_line_index(frange.file_id)?;
     let range = range(&line_index, frange.range);
@@ -806,7 +810,7 @@ pub(crate) fn location(
 pub(crate) fn location_from_nav(
     snap: &GlobalStateSnapshot,
     nav: NavigationTarget,
-) -> Result<lsp_types::Location> {
+) -> Cancellable<lsp_types::Location> {
     let url = url(snap, nav.file_id);
     let line_index = snap.file_line_index(nav.file_id)?;
     let range = range(&line_index, nav.full_range);
@@ -818,7 +822,7 @@ pub(crate) fn location_link(
     snap: &GlobalStateSnapshot,
     src: Option<FileRange>,
     target: NavigationTarget,
-) -> Result<lsp_types::LocationLink> {
+) -> Cancellable<lsp_types::LocationLink> {
     let origin_selection_range = match src {
         Some(src) => {
             let line_index = snap.file_line_index(src.file_id)?;
@@ -840,7 +844,7 @@ pub(crate) fn location_link(
 fn location_info(
     snap: &GlobalStateSnapshot,
     target: NavigationTarget,
-) -> Result<(lsp_types::Url, lsp_types::Range, lsp_types::Range)> {
+) -> Cancellable<(lsp_types::Url, lsp_types::Range, lsp_types::Range)> {
     let line_index = snap.file_line_index(target.file_id)?;
 
     let target_uri = url(snap, target.file_id);
@@ -854,12 +858,12 @@ pub(crate) fn goto_definition_response(
     snap: &GlobalStateSnapshot,
     src: Option<FileRange>,
     targets: Vec<NavigationTarget>,
-) -> Result<lsp_types::GotoDefinitionResponse> {
+) -> Cancellable<lsp_types::GotoDefinitionResponse> {
     if snap.config.location_link() {
         let links = targets
             .into_iter()
             .map(|nav| location_link(snap, src, nav))
-            .collect::<Result<Vec<_>>>()?;
+            .collect::<Cancellable<Vec<_>>>()?;
         Ok(links.into())
     } else {
         let locations = targets
@@ -867,7 +871,7 @@ pub(crate) fn goto_definition_response(
             .map(|nav| {
                 location(snap, FileRange { file_id: nav.file_id, range: nav.focus_or_full_range() })
             })
-            .collect::<Result<Vec<_>>>()?;
+            .collect::<Cancellable<Vec<_>>>()?;
         Ok(locations.into())
     }
 }
@@ -881,7 +885,7 @@ pub(crate) fn snippet_text_document_edit(
     is_snippet: bool,
     file_id: FileId,
     edit: TextEdit,
-) -> Result<lsp_ext::SnippetTextDocumentEdit> {
+) -> Cancellable<lsp_ext::SnippetTextDocumentEdit> {
     let text_document = optional_versioned_text_document_identifier(snap, file_id);
     let line_index = snap.file_line_index(file_id)?;
     let mut edits: Vec<_> =
@@ -958,7 +962,7 @@ pub(crate) fn snippet_text_document_ops(
 pub(crate) fn snippet_workspace_edit(
     snap: &GlobalStateSnapshot,
     source_change: SourceChange,
-) -> Result<lsp_ext::SnippetWorkspaceEdit> {
+) -> Cancellable<lsp_ext::SnippetWorkspaceEdit> {
     let mut document_changes: Vec<lsp_ext::SnippetDocumentChangeOperation> = Vec::new();
 
     for op in source_change.file_system_edits {
@@ -995,7 +999,7 @@ pub(crate) fn snippet_workspace_edit(
 pub(crate) fn workspace_edit(
     snap: &GlobalStateSnapshot,
     source_change: SourceChange,
-) -> Result<lsp_types::WorkspaceEdit> {
+) -> Cancellable<lsp_types::WorkspaceEdit> {
     assert!(!source_change.is_snippet);
     snippet_workspace_edit(snap, source_change).map(|it| it.into())
 }
@@ -1048,7 +1052,7 @@ impl From<lsp_ext::SnippetTextEdit>
 pub(crate) fn call_hierarchy_item(
     snap: &GlobalStateSnapshot,
     target: NavigationTarget,
-) -> Result<lsp_types::CallHierarchyItem> {
+) -> Cancellable<lsp_types::CallHierarchyItem> {
     let name = target.name.to_string();
     let detail = target.description.clone();
     let kind = target.kind.map(symbol_kind).unwrap_or(lsp_types::SymbolKind::FUNCTION);
@@ -1080,7 +1084,7 @@ pub(crate) fn code_action(
     snap: &GlobalStateSnapshot,
     assist: Assist,
     resolve_data: Option<(usize, lsp_types::CodeActionParams)>,
-) -> Result<lsp_ext::CodeAction> {
+) -> Cancellable<lsp_ext::CodeAction> {
     let mut res = lsp_ext::CodeAction {
         title: assist.label.to_string(),
         group: assist.group.filter(|_| snap.config.code_action_group()).map(|gr| gr.0),
@@ -1113,13 +1117,13 @@ pub(crate) fn code_action(
 pub(crate) fn runnable(
     snap: &GlobalStateSnapshot,
     runnable: Runnable,
-) -> Result<lsp_ext::Runnable> {
+) -> Cancellable<lsp_ext::Runnable> {
     let config = snap.config.runnables();
     let spec = CargoTargetSpec::for_file(snap, runnable.nav.file_id)?;
     let workspace_root = spec.as_ref().map(|it| it.workspace_root.clone());
     let target = spec.as_ref().map(|s| s.target.clone());
     let (cargo_args, executable_args) =
-        CargoTargetSpec::runnable_args(snap, spec, &runnable.kind, &runnable.cfg)?;
+        CargoTargetSpec::runnable_args(snap, spec, &runnable.kind, &runnable.cfg);
     let label = runnable.label(target);
     let location = location_link(snap, None, runnable.nav)?;
 
@@ -1142,7 +1146,7 @@ pub(crate) fn code_lens(
     acc: &mut Vec<lsp_types::CodeLens>,
     snap: &GlobalStateSnapshot,
     annotation: Annotation,
-) -> Result<()> {
+) -> Cancellable<()> {
     let client_commands_config = snap.config.client_commands();
     match annotation.kind {
         AnnotationKind::Runnable(run) => {
@@ -1394,7 +1398,7 @@ fn main() {
         let line_index = LineIndex {
             index: Arc::new(ide::LineIndex::new(text)),
             endings: LineEndings::Unix,
-            encoding: OffsetEncoding::Utf16,
+            encoding: PositionEncoding::Utf16,
         };
         let converted: Vec<lsp_types::FoldingRange> =
             folds.into_iter().map(|it| folding_range(text, &line_index, true, it)).collect();
diff --git a/src/tools/rust-analyzer/crates/sourcegen/Cargo.toml b/src/tools/rust-analyzer/crates/sourcegen/Cargo.toml
index e75867e2d..593dc4e55 100644
--- a/src/tools/rust-analyzer/crates/sourcegen/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/sourcegen/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/stdx/Cargo.toml b/src/tools/rust-analyzer/crates/stdx/Cargo.toml
index e0657ab0f..f7b7d0964 100644
--- a/src/tools/rust-analyzer/crates/stdx/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/stdx/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
@@ -16,7 +16,7 @@ always-assert = { version = "0.1.2", features = ["log"] }
 # Think twice before adding anything here
 
 [target.'cfg(windows)'.dependencies]
-miow = "0.4.0"
+miow = "0.5.0"
 winapi = { version = "0.3.9", features = ["winerror"] }
 
 [features]
diff --git a/src/tools/rust-analyzer/crates/syntax/Cargo.toml b/src/tools/rust-analyzer/crates/syntax/Cargo.toml
index 1ef903371..00743cca5 100644
--- a/src/tools/rust-analyzer/crates/syntax/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/syntax/Cargo.toml
@@ -5,7 +5,7 @@ description = "Comment and whitespace preserving parser for the Rust language"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/rust-analyzer"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/syntax/fuzz/Cargo.toml b/src/tools/rust-analyzer/crates/syntax/fuzz/Cargo.toml
index ba2f515b0..f295c4006 100644
--- a/src/tools/rust-analyzer/crates/syntax/fuzz/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/syntax/fuzz/Cargo.toml
@@ -4,7 +4,7 @@ name = "syntax-fuzz"
 version = "0.0.1"
 publish = false
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [package.metadata]
 cargo-fuzz = true
diff --git a/src/tools/rust-analyzer/crates/syntax/rust.ungram b/src/tools/rust-analyzer/crates/syntax/rust.ungram
index 894795435..0a0cb0290 100644
--- a/src/tools/rust-analyzer/crates/syntax/rust.ungram
+++ b/src/tools/rust-analyzer/crates/syntax/rust.ungram
@@ -51,7 +51,7 @@ TypeArg =
   Type
 
 AssocTypeArg =
-  NameRef GenericParamList? (':' TypeBoundList | ('=' Type | ConstArg))
+  NameRef GenericArgList? (':' TypeBoundList | ('=' Type | ConstArg))
 
 LifetimeArg =
   Lifetime
@@ -239,8 +239,11 @@ Static =
 Trait =
   Attr* Visibility?
   'unsafe'? 'auto'?
-  'trait' Name GenericParamList? (':' TypeBoundList?)? WhereClause?
-  AssocItemList
+  'trait' Name GenericParamList?
+  (
+    (':' TypeBoundList?)? WhereClause? AssocItemList
+    | '=' TypeBoundList? WhereClause? ';'
+  )
 
 AssocItemList =
   '{' Attr* AssocItem* '}'
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs
index 449402e5f..2ea715f47 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs
@@ -120,7 +120,7 @@ pub struct AssocTypeArg {
 impl ast::HasTypeBounds for AssocTypeArg {}
 impl AssocTypeArg {
     pub fn name_ref(&self) -> Option<NameRef> { support::child(&self.syntax) }
-    pub fn generic_param_list(&self) -> Option<GenericParamList> { support::child(&self.syntax) }
+    pub fn generic_arg_list(&self) -> Option<GenericArgList> { support::child(&self.syntax) }
     pub fn eq_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![=]) }
     pub fn ty(&self) -> Option<Type> { support::child(&self.syntax) }
     pub fn const_arg(&self) -> Option<ConstArg> { support::child(&self.syntax) }
@@ -143,16 +143,6 @@ impl ConstArg {
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct GenericParamList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl GenericParamList {
-    pub fn l_angle_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![<]) }
-    pub fn generic_params(&self) -> AstChildren<GenericParam> { support::children(&self.syntax) }
-    pub fn r_angle_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![>]) }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct TypeBoundList {
     pub(crate) syntax: SyntaxNode,
 }
@@ -417,6 +407,8 @@ impl Trait {
     pub fn auto_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![auto]) }
     pub fn trait_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![trait]) }
     pub fn assoc_item_list(&self) -> Option<AssocItemList> { support::child(&self.syntax) }
+    pub fn eq_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![=]) }
+    pub fn semicolon_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![;]) }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
@@ -528,6 +520,16 @@ impl Abi {
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct GenericParamList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl GenericParamList {
+    pub fn l_angle_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![<]) }
+    pub fn generic_params(&self) -> AstChildren<GenericParam> { support::children(&self.syntax) }
+    pub fn r_angle_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![>]) }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct WhereClause {
     pub(crate) syntax: SyntaxNode,
 }
@@ -1834,17 +1836,6 @@ impl AstNode for ConstArg {
     }
     fn syntax(&self) -> &SyntaxNode { &self.syntax }
 }
-impl AstNode for GenericParamList {
-    fn can_cast(kind: SyntaxKind) -> bool { kind == GENERIC_PARAM_LIST }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode { &self.syntax }
-}
 impl AstNode for TypeBoundList {
     fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_BOUND_LIST }
     fn cast(syntax: SyntaxNode) -> Option<Self> {
@@ -2153,6 +2144,17 @@ impl AstNode for Abi {
     }
     fn syntax(&self) -> &SyntaxNode { &self.syntax }
 }
+impl AstNode for GenericParamList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == GENERIC_PARAM_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
 impl AstNode for WhereClause {
     fn can_cast(kind: SyntaxKind) -> bool { kind == WHERE_CLAUSE }
     fn cast(syntax: SyntaxNode) -> Option<Self> {
@@ -4263,11 +4265,6 @@ impl std::fmt::Display for ConstArg {
         std::fmt::Display::fmt(self.syntax(), f)
     }
 }
-impl std::fmt::Display for GenericParamList {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
 impl std::fmt::Display for TypeBoundList {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         std::fmt::Display::fmt(self.syntax(), f)
@@ -4408,6 +4405,11 @@ impl std::fmt::Display for Abi {
         std::fmt::Display::fmt(self.syntax(), f)
     }
 }
+impl std::fmt::Display for GenericParamList {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
 impl std::fmt::Display for WhereClause {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         std::fmt::Display::fmt(self.syntax(), f)
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
index 4057a75e7..8c26009ad 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
@@ -334,6 +334,10 @@ pub fn block_expr(
     ast_from_text(&format!("fn f() {buf}"))
 }
 
+pub fn tail_only_block_expr(tail_expr: ast::Expr) -> ast::BlockExpr {
+    ast_from_text(&format!("fn f() {{ {tail_expr} }}"))
+}
+
 /// Ideally this function wouldn't exist since it involves manual indenting.
 /// It differs from `make::block_expr` by also supporting comments.
 ///
@@ -656,6 +660,22 @@ pub fn let_stmt(
     };
     ast_from_text(&format!("fn f() {{ {text} }}"))
 }
+
+pub fn let_else_stmt(
+    pattern: ast::Pat,
+    ty: Option<ast::Type>,
+    expr: ast::Expr,
+    diverging: ast::BlockExpr,
+) -> ast::LetStmt {
+    let mut text = String::new();
+    format_to!(text, "let {pattern}");
+    if let Some(ty) = ty {
+        format_to!(text, ": {ty}");
+    }
+    format_to!(text, " = {expr} else {diverging};");
+    ast_from_text(&format!("fn f() {{ {text} }}"))
+}
+
 pub fn expr_stmt(expr: ast::Expr) -> ast::ExprStmt {
     let semi = if expr.is_block_like() { "" } else { ";" };
     ast_from_text(&format!("fn f() {{ {expr}{semi} (); }}"))
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/token_ext.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/token_ext.rs
index ba72e6442..8990f7a7d 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/token_ext.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/token_ext.rs
@@ -209,17 +209,19 @@ impl ast::String {
         let text = &text[self.text_range_between_quotes()? - self.syntax().text_range().start()];
 
         let mut buf = String::new();
-        let mut text_iter = text.chars();
+        let mut prev_end = 0;
         let mut has_error = false;
         unescape_literal(text, Mode::Str, &mut |char_range, unescaped_char| match (
             unescaped_char,
             buf.capacity() == 0,
         ) {
             (Ok(c), false) => buf.push(c),
-            (Ok(c), true) if char_range.len() == 1 && Some(c) == text_iter.next() => (),
+            (Ok(_), true) if char_range.len() == 1 && char_range.start == prev_end => {
+                prev_end = char_range.end
+            }
             (Ok(c), true) => {
                 buf.reserve_exact(text.len());
-                buf.push_str(&text[..char_range.start]);
+                buf.push_str(&text[..prev_end]);
                 buf.push(c);
             }
             (Err(_), _) => has_error = true,
@@ -252,17 +254,19 @@ impl ast::ByteString {
         let text = &text[self.text_range_between_quotes()? - self.syntax().text_range().start()];
 
         let mut buf: Vec<u8> = Vec::new();
-        let mut text_iter = text.chars();
+        let mut prev_end = 0;
         let mut has_error = false;
         unescape_literal(text, Mode::ByteStr, &mut |char_range, unescaped_char| match (
             unescaped_char,
             buf.capacity() == 0,
         ) {
             (Ok(c), false) => buf.push(c as u8),
-            (Ok(c), true) if char_range.len() == 1 && Some(c) == text_iter.next() => (),
+            (Ok(_), true) if char_range.len() == 1 && char_range.start == prev_end => {
+                prev_end = char_range.end
+            }
             (Ok(c), true) => {
                 buf.reserve_exact(text.len());
-                buf.extend_from_slice(text[..char_range.start].as_bytes());
+                buf.extend_from_slice(text[..prev_end].as_bytes());
                 buf.push(c as u8);
             }
             (Err(_), _) => has_error = true,
@@ -445,6 +449,36 @@ mod tests {
         check_string_value(r"\foobar", None);
         check_string_value(r"\nfoobar", "\nfoobar");
         check_string_value(r"C:\\Windows\\System32\\", "C:\\Windows\\System32\\");
+        check_string_value(r"\x61bcde", "abcde");
+        check_string_value(
+            r"a\
+bcde", "abcde",
+        );
+    }
+
+    fn check_byte_string_value<'a, const N: usize>(
+        lit: &str,
+        expected: impl Into<Option<&'a [u8; N]>>,
+    ) {
+        assert_eq!(
+            ast::ByteString { syntax: make::tokens::literal(&format!("b\"{}\"", lit)) }
+                .value()
+                .as_deref(),
+            expected.into().map(|value| &value[..])
+        );
+    }
+
+    #[test]
+    fn test_byte_string_escape() {
+        check_byte_string_value(r"foobar", b"foobar");
+        check_byte_string_value(r"\foobar", None::<&[u8; 0]>);
+        check_byte_string_value(r"\nfoobar", b"\nfoobar");
+        check_byte_string_value(r"C:\\Windows\\System32\\", b"C:\\Windows\\System32\\");
+        check_byte_string_value(r"\x61bcde", b"abcde");
+        check_byte_string_value(
+            r"a\
+bcde", b"abcde",
+        );
     }
 
     #[test]
diff --git a/src/tools/rust-analyzer/crates/syntax/src/tests/sourcegen_ast.rs b/src/tools/rust-analyzer/crates/syntax/src/tests/sourcegen_ast.rs
index 70b54843d..712ef5f63 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/tests/sourcegen_ast.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/tests/sourcegen_ast.rs
@@ -86,7 +86,7 @@ fn generate_nodes(kinds: KindsSrc<'_>, grammar: &AstSrc) -> String {
                 .traits
                 .iter()
                 .filter(|trait_name| {
-                    // Loops have two expressions so this might collide, therefor manual impl it
+                    // Loops have two expressions so this might collide, therefore manual impl it
                     node.name != "ForExpr" && node.name != "WhileExpr"
                         || trait_name.as_str() != "HasLoopBody"
                 })
diff --git a/src/tools/rust-analyzer/crates/syntax/src/validation.rs b/src/tools/rust-analyzer/crates/syntax/src/validation.rs
index b9f2b5132..1eea23464 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/validation.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/validation.rs
@@ -5,9 +5,7 @@
 mod block;
 
 use rowan::Direction;
-use rustc_lexer::unescape::{
-    self, unescape_byte, unescape_byte_literal, unescape_char, unescape_literal, Mode,
-};
+use rustc_lexer::unescape::{self, unescape_byte, unescape_char, unescape_literal, Mode};
 
 use crate::{
     algo,
@@ -143,7 +141,7 @@ fn validate_literal(literal: ast::Literal, acc: &mut Vec<SyntaxError>) {
         ast::LiteralKind::ByteString(s) => {
             if !s.is_raw() {
                 if let Some(without_quotes) = unquote(text, 2, '"') {
-                    unescape_byte_literal(without_quotes, Mode::ByteStr, &mut |range, char| {
+                    unescape_literal(without_quotes, Mode::ByteStr, &mut |range, char| {
                         if let Err(err) = char {
                             push_err(2, (range.start, err));
                         }
diff --git a/src/tools/rust-analyzer/crates/test-utils/Cargo.toml b/src/tools/rust-analyzer/crates/test-utils/Cargo.toml
index cceafe04e..1047373b1 100644
--- a/src/tools/rust-analyzer/crates/test-utils/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/test-utils/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/text-edit/Cargo.toml b/src/tools/rust-analyzer/crates/text-edit/Cargo.toml
index 7a90d64a9..8df7e1af6 100644
--- a/src/tools/rust-analyzer/crates/text-edit/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/text-edit/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/toolchain/Cargo.toml b/src/tools/rust-analyzer/crates/toolchain/Cargo.toml
index 3e0f31f19..a6a3ae742 100644
--- a/src/tools/rust-analyzer/crates/toolchain/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/toolchain/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/tt/Cargo.toml b/src/tools/rust-analyzer/crates/tt/Cargo.toml
index 52dfb8608..4f2103f3a 100644
--- a/src/tools/rust-analyzer/crates/tt/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/tt/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/vfs-notify/Cargo.toml b/src/tools/rust-analyzer/crates/vfs-notify/Cargo.toml
index df5dc24e2..061f3c157 100644
--- a/src/tools/rust-analyzer/crates/vfs-notify/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/vfs-notify/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false
diff --git a/src/tools/rust-analyzer/crates/vfs/Cargo.toml b/src/tools/rust-analyzer/crates/vfs/Cargo.toml
index d7549a284..e55bf6f29 100644
--- a/src/tools/rust-analyzer/crates/vfs/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/vfs/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.65"
 
 [lib]
 doctest = false