Merge remote-tracking branch 'origin/master' into sync-from-rust-2

12 files changed, 169 insertions, 64 deletions

diff --git a/crates/hir-def/src/body/lower.rs b/crates/hir-def/src/body/lower.rs
index c3f26112278..66f9c24e872 100644
--- a/crates/hir-def/src/body/lower.rs
+++ b/crates/hir-def/src/body/lower.rs
@@ -96,6 +96,7 @@ pub(super) fn lower(
         expander,
         name_to_pat_grouping: Default::default(),
         is_lowering_inside_or_pat: false,
+        is_lowering_assignee_expr: false,
     }
     .collect(params, body)
 }
@@ -109,6 +110,7 @@ struct ExprCollector<'a> {
     // a poor-mans union-find?
     name_to_pat_grouping: FxHashMap<Name, Vec<PatId>>,
     is_lowering_inside_or_pat: bool,
+    is_lowering_assignee_expr: bool,
 }
 
 impl ExprCollector<'_> {
@@ -283,7 +285,10 @@ impl ExprCollector<'_> {
                 } else {
                     Box::default()
                 };
-                self.alloc_expr(Expr::Call { callee, args }, syntax_ptr)
+                self.alloc_expr(
+                    Expr::Call { callee, args, is_assignee_expr: self.is_lowering_assignee_expr },
+                    syntax_ptr,
+                )
             }
             ast::Expr::MethodCallExpr(e) => {
                 let receiver = self.collect_expr_opt(e.receiver());
@@ -359,6 +364,7 @@ impl ExprCollector<'_> {
             ast::Expr::RecordExpr(e) => {
                 let path =
                     e.path().and_then(|path| self.expander.parse_path(self.db, path)).map(Box::new);
+                let is_assignee_expr = self.is_lowering_assignee_expr;
                 let record_lit = if let Some(nfl) = e.record_expr_field_list() {
                     let fields = nfl
                         .fields()
@@ -378,9 +384,16 @@ impl ExprCollector<'_> {
                         })
                         .collect();
                     let spread = nfl.spread().map(|s| self.collect_expr(s));
-                    Expr::RecordLit { path, fields, spread }
+                    let ellipsis = nfl.dotdot_token().is_some();
+                    Expr::RecordLit { path, fields, spread, ellipsis, is_assignee_expr }
                 } else {
-                    Expr::RecordLit { path, fields: Box::default(), spread: None }
+                    Expr::RecordLit {
+                        path,
+                        fields: Box::default(),
+                        spread: None,
+                        ellipsis: false,
+                        is_assignee_expr,
+                    }
                 };
 
                 self.alloc_expr(record_lit, syntax_ptr)
@@ -458,14 +471,21 @@ impl ExprCollector<'_> {
                 )
             }
             ast::Expr::BinExpr(e) => {
+                let op = e.op_kind();
+                if let Some(ast::BinaryOp::Assignment { op: None }) = op {
+                    self.is_lowering_assignee_expr = true;
+                }
                 let lhs = self.collect_expr_opt(e.lhs());
+                self.is_lowering_assignee_expr = false;
                 let rhs = self.collect_expr_opt(e.rhs());
-                let op = e.op_kind();
                 self.alloc_expr(Expr::BinaryOp { lhs, rhs, op }, syntax_ptr)
             }
             ast::Expr::TupleExpr(e) => {
                 let exprs = e.fields().map(|expr| self.collect_expr(expr)).collect();
-                self.alloc_expr(Expr::Tuple { exprs }, syntax_ptr)
+                self.alloc_expr(
+                    Expr::Tuple { exprs, is_assignee_expr: self.is_lowering_assignee_expr },
+                    syntax_ptr,
+                )
             }
             ast::Expr::BoxExpr(e) => {
                 let expr = self.collect_expr_opt(e.expr());
@@ -477,8 +497,14 @@ impl ExprCollector<'_> {
 
                 match kind {
                     ArrayExprKind::ElementList(e) => {
-                        let exprs = e.map(|expr| self.collect_expr(expr)).collect();
-                        self.alloc_expr(Expr::Array(Array::ElementList(exprs)), syntax_ptr)
+                        let elements = e.map(|expr| self.collect_expr(expr)).collect();
+                        self.alloc_expr(
+                            Expr::Array(Array::ElementList {
+                                elements,
+                                is_assignee_expr: self.is_lowering_assignee_expr,
+                            }),
+                            syntax_ptr,
+                        )
                     }
                     ArrayExprKind::Repeat { initializer, repeat } => {
                         let initializer = self.collect_expr_opt(initializer);
diff --git a/crates/hir-def/src/expr.rs b/crates/hir-def/src/expr.rs
index a991365d6bf..c1b3788acb7 100644
--- a/crates/hir-def/src/expr.rs
+++ b/crates/hir-def/src/expr.rs
@@ -110,6 +110,7 @@ pub enum Expr {
     Call {
         callee: ExprId,
         args: Box<[ExprId]>,
+        is_assignee_expr: bool,
     },
     MethodCall {
         receiver: ExprId,
@@ -138,6 +139,8 @@ pub enum Expr {
         path: Option<Box<Path>>,
         fields: Box<[RecordLitField]>,
         spread: Option<ExprId>,
+        ellipsis: bool,
+        is_assignee_expr: bool,
     },
     Field {
         expr: ExprId,
@@ -196,6 +199,7 @@ pub enum Expr {
     },
     Tuple {
         exprs: Box<[ExprId]>,
+        is_assignee_expr: bool,
     },
     Unsafe {
         body: ExprId,
@@ -211,7 +215,7 @@ pub enum Expr {
 
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub enum Array {
-    ElementList(Box<[ExprId]>),
+    ElementList { elements: Box<[ExprId]>, is_assignee_expr: bool },
     Repeat { initializer: ExprId, repeat: ExprId },
 }
 
@@ -285,7 +289,7 @@ impl Expr {
                 f(*iterable);
                 f(*body);
             }
-            Expr::Call { callee, args } => {
+            Expr::Call { callee, args, .. } => {
                 f(*callee);
                 args.iter().copied().for_each(f);
             }
@@ -339,9 +343,9 @@ impl Expr {
             | Expr::Box { expr } => {
                 f(*expr);
             }
-            Expr::Tuple { exprs } => exprs.iter().copied().for_each(f),
+            Expr::Tuple { exprs, .. } => exprs.iter().copied().for_each(f),
             Expr::Array(a) => match a {
-                Array::ElementList(exprs) => exprs.iter().copied().for_each(f),
+                Array::ElementList { elements, .. } => elements.iter().copied().for_each(f),
                 Array::Repeat { initializer, repeat } => {
                     f(*initializer);
                     f(*repeat)
diff --git a/crates/hir-ty/src/diagnostics/expr.rs b/crates/hir-ty/src/diagnostics/expr.rs
index 8cca522aef6..642e03edd23 100644
--- a/crates/hir-ty/src/diagnostics/expr.rs
+++ b/crates/hir-ty/src/diagnostics/expr.rs
@@ -305,7 +305,10 @@ pub fn record_literal_missing_fields(
     expr: &Expr,
 ) -> Option<(VariantId, Vec<LocalFieldId>, /*exhaustive*/ bool)> {
     let (fields, exhaustive) = match expr {
-        Expr::RecordLit { path: _, fields, spread } => (fields, spread.is_none()),
+        Expr::RecordLit { fields, spread, ellipsis, is_assignee_expr, .. } => {
+            let exhaustive = if *is_assignee_expr { !*ellipsis } else { spread.is_none() };
+            (fields, exhaustive)
+        }
         _ => return None,
     };
 
diff --git a/crates/hir-ty/src/infer/expr.rs b/crates/hir-ty/src/infer/expr.rs
index 2f334670720..d164e64a8be 100644
--- a/crates/hir-ty/src/infer/expr.rs
+++ b/crates/hir-ty/src/infer/expr.rs
@@ -276,7 +276,7 @@ impl<'a> InferenceContext<'a> {
 
                 closure_ty
             }
-            Expr::Call { callee, args } => {
+            Expr::Call { callee, args, .. } => {
                 let callee_ty = self.infer_expr(*callee, &Expectation::none());
                 let mut derefs = Autoderef::new(&mut self.table, callee_ty.clone());
                 let mut res = None;
@@ -421,7 +421,7 @@ impl<'a> InferenceContext<'a> {
                 }
                 TyKind::Never.intern(Interner)
             }
-            Expr::RecordLit { path, fields, spread } => {
+            Expr::RecordLit { path, fields, spread, .. } => {
                 let (ty, def_id) = self.resolve_variant(path.as_deref(), false);
                 if let Some(variant) = def_id {
                     self.write_variant_resolution(tgt_expr.into(), variant);
@@ -693,7 +693,7 @@ impl<'a> InferenceContext<'a> {
                     self.err_ty()
                 }
             }
-            Expr::Tuple { exprs } => {
+            Expr::Tuple { exprs, .. } => {
                 let mut tys = match expected
                     .only_has_type(&mut self.table)
                     .as_ref()
@@ -724,12 +724,12 @@ impl<'a> InferenceContext<'a> {
 
                 let expected = Expectation::has_type(elem_ty.clone());
                 let len = match array {
-                    Array::ElementList(items) => {
-                        for &expr in items.iter() {
+                    Array::ElementList { elements, .. } => {
+                        for &expr in elements.iter() {
                             let cur_elem_ty = self.infer_expr_inner(expr, &expected);
                             coerce.coerce(self, Some(expr), &cur_elem_ty);
                         }
-                        consteval::usize_const(Some(items.len() as u128))
+                        consteval::usize_const(Some(elements.len() as u128))
                     }
                     &Array::Repeat { initializer, repeat } => {
                         self.infer_expr_coerce(initializer, &Expectation::has_type(elem_ty));
@@ -850,7 +850,7 @@ impl<'a> InferenceContext<'a> {
         let rhs_ty = self.resolve_ty_shallow(rhs_ty);
 
         let ty = match &self.body[lhs] {
-            Expr::Tuple { exprs } => {
+            Expr::Tuple { exprs, .. } => {
                 // We don't consider multiple ellipses. This is analogous to
                 // `hir_def::body::lower::ExprCollector::collect_tuple_pat()`.
                 let ellipsis = exprs.iter().position(|e| is_rest_expr(*e));
@@ -858,7 +858,7 @@ impl<'a> InferenceContext<'a> {
 
                 self.infer_tuple_pat_like(&rhs_ty, (), ellipsis, &exprs)
             }
-            Expr::Call { callee, args } => {
+            Expr::Call { callee, args, .. } => {
                 // Tuple structs
                 let path = match &self.body[*callee] {
                     Expr::Path(path) => Some(path),
@@ -872,7 +872,7 @@ impl<'a> InferenceContext<'a> {
 
                 self.infer_tuple_struct_pat_like(path, &rhs_ty, (), lhs, ellipsis, &args)
             }
-            Expr::Array(Array::ElementList(elements)) => {
+            Expr::Array(Array::ElementList { elements, .. }) => {
                 let elem_ty = match rhs_ty.kind(Interner) {
                     TyKind::Array(st, _) => st.clone(),
                     _ => self.err_ty(),
diff --git a/crates/ide-assists/src/handlers/add_missing_impl_members.rs b/crates/ide-assists/src/handlers/add_missing_impl_members.rs
index 7f2a26ad067..c808c010c67 100644
--- a/crates/ide-assists/src/handlers/add_missing_impl_members.rs
+++ b/crates/ide-assists/src/handlers/add_missing_impl_members.rs
@@ -145,13 +145,16 @@ fn add_missing_impl_members_inner(
             Some(cap) => {
                 let mut cursor = Cursor::Before(first_new_item.syntax());
                 let placeholder;
-                if let ast::AssocItem::Fn(func) = &first_new_item {
-                    if try_gen_trait_body(ctx, func, &trait_, &impl_def).is_none() {
-                        if let Some(m) = func.syntax().descendants().find_map(ast::MacroCall::cast)
-                        {
-                            if m.syntax().text() == "todo!()" {
-                                placeholder = m;
-                                cursor = Cursor::Replace(placeholder.syntax());
+                if let DefaultMethods::No = mode {
+                    if let ast::AssocItem::Fn(func) = &first_new_item {
+                        if try_gen_trait_body(ctx, func, &trait_, &impl_def).is_none() {
+                            if let Some(m) =
+                                func.syntax().descendants().find_map(ast::MacroCall::cast)
+                            {
+                                if m.syntax().text() == "todo!()" {
+                                    placeholder = m;
+                                    cursor = Cursor::Replace(placeholder.syntax());
+                                }
                             }
                         }
                     }
diff --git a/crates/ide-assists/src/utils/gen_trait_fn_body.rs b/crates/ide-assists/src/utils/gen_trait_fn_body.rs
index ec4835969f8..7a0c912959a 100644
--- a/crates/ide-assists/src/utils/gen_trait_fn_body.rs
+++ b/crates/ide-assists/src/utils/gen_trait_fn_body.rs
@@ -5,7 +5,7 @@ use syntax::{
     ted,
 };
 
-/// Generate custom trait bodies where possible.
+/// Generate custom trait bodies without default implementation where possible.
 ///
 /// Returns `Option` so that we can use `?` rather than `if let Some`. Returning
 /// `None` means that generating a custom trait body failed, and the body will remain
@@ -28,6 +28,7 @@ pub(crate) fn gen_trait_fn_body(
 
 /// Generate a `Clone` impl based on the fields and members of the target type.
 fn gen_clone_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
+    stdx::always!(func.name().map_or(false, |name| name.text() == "clone"));
     fn gen_clone_call(target: ast::Expr) -> ast::Expr {
         let method = make::name_ref("clone");
         make::expr_method_call(target, method, make::arg_list(None))
@@ -339,6 +340,7 @@ fn gen_default_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
 
 /// Generate a `Hash` impl based on the fields and members of the target type.
 fn gen_hash_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
+    stdx::always!(func.name().map_or(false, |name| name.text() == "hash"));
     fn gen_hash_call(target: ast::Expr) -> ast::Stmt {
         let method = make::name_ref("hash");
         let arg = make::expr_path(make::ext::ident_path("state"));
@@ -394,9 +396,7 @@ fn gen_hash_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
 
 /// Generate a `PartialEq` impl based on the fields and members of the target type.
 fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
-    if func.name().map_or(false, |name| name.text() == "ne") {
-        return None;
-    }
+    stdx::always!(func.name().map_or(false, |name| name.text() == "eq"));
     fn gen_eq_chain(expr: Option<ast::Expr>, cmp: ast::Expr) -> Option<ast::Expr> {
         match expr {
             Some(expr) => Some(make::expr_bin_op(expr, BinaryOp::LogicOp(LogicOp::And), cmp)),
@@ -573,6 +573,7 @@ fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
 }
 
 fn gen_partial_ord(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
+    stdx::always!(func.name().map_or(false, |name| name.text() == "partial_cmp"));
     fn gen_partial_eq_match(match_target: ast::Expr) -> Option<ast::Stmt> {
         let mut arms = vec![];
 
@@ -643,7 +644,7 @@ fn gen_partial_ord(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                 make::block_expr(stmts.into_iter(), tail).indent(ast::edit::IndentLevel(1))
             }
 
-            // No fields in the body means there's nothing to hash.
+            // No fields in the body means there's nothing to compare.
             None => {
                 let expr = make::expr_literal("true").into();
                 make::block_expr(None, Some(expr)).indent(ast::edit::IndentLevel(1))
diff --git a/crates/ide-completion/src/render.rs b/crates/ide-completion/src/render.rs
index 3f25b294e01..9b25964a608 100644
--- a/crates/ide-completion/src/render.rs
+++ b/crates/ide-completion/src/render.rs
@@ -121,7 +121,7 @@ pub(crate) fn render_field(
     let mut item = CompletionItem::new(
         SymbolKind::Field,
         ctx.source_range(),
-        receiver.map_or_else(|| name.clone(), |receiver| format!("{}.{}", receiver, name).into()),
+        field_with_receiver(receiver.as_ref(), &name),
     );
     item.set_relevance(CompletionRelevance {
         type_match: compute_type_match(ctx.completion, ty),
@@ -132,7 +132,7 @@ pub(crate) fn render_field(
         .set_documentation(field.docs(ctx.db()))
         .set_deprecated(is_deprecated)
         .lookup_by(name.clone());
-    item.insert_text(escaped_name);
+    item.insert_text(field_with_receiver(receiver.as_ref(), &escaped_name));
     if let Some(receiver) = &dot_access.receiver {
         if let Some(original) = ctx.completion.sema.original_ast_node(receiver.clone()) {
             if let Some(ref_match) = compute_ref_match(ctx.completion, ty) {
@@ -143,6 +143,11 @@ pub(crate) fn render_field(
     item.build()
 }
 
+fn field_with_receiver(receiver: Option<&hir::Name>, field_name: &str) -> SmolStr {
+    receiver
+        .map_or_else(|| field_name.into(), |receiver| format!("{}.{}", receiver, field_name).into())
+}
+
 pub(crate) fn render_tuple_field(
     ctx: RenderContext<'_>,
     receiver: Option<hir::Name>,
@@ -152,7 +157,7 @@ pub(crate) fn render_tuple_field(
     let mut item = CompletionItem::new(
         SymbolKind::Field,
         ctx.source_range(),
-        receiver.map_or_else(|| field.to_string(), |receiver| format!("{}.{}", receiver, field)),
+        field_with_receiver(receiver.as_ref(), &field.to_string()),
     );
     item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
     item.build()
@@ -1876,4 +1881,33 @@ impl r#trait for r#struct { type r#type = $0; }
 "#,
         )
     }
+
+    #[test]
+    fn field_access_includes_self() {
+        check_edit(
+            "length",
+            r#"
+struct S {
+    length: i32
+}
+
+impl S {
+    fn some_fn(&self) {
+        let l = len$0
+    }
+}
+"#,
+            r#"
+struct S {
+    length: i32
+}
+
+impl S {
+    fn some_fn(&self) {
+        let l = self.length
+    }
+}
+"#,
+        )
+    }
 }
diff --git a/crates/ide-diagnostics/src/handlers/missing_fields.rs b/crates/ide-diagnostics/src/handlers/missing_fields.rs
index 30f903af50d..edb1fc0919c 100644
--- a/crates/ide-diagnostics/src/handlers/missing_fields.rs
+++ b/crates/ide-diagnostics/src/handlers/missing_fields.rs
@@ -293,6 +293,37 @@ fn x(a: S) {
     }
 
     #[test]
+    fn missing_record_expr_in_assignee_expr() {
+        check_diagnostics(
+            r"
+struct S { s: usize, t: usize }
+struct S2 { s: S, t: () }
+struct T(S);
+fn regular(a: S) {
+    let s;
+    S { s, .. } = a;
+}
+fn nested(a: S2) {
+    let s;
+    S2 { s: S { s, .. }, .. } = a;
+}
+fn in_tuple(a: (S,)) {
+    let s;
+    (S { s, .. },) = a;
+}
+fn in_array(a: [S;1]) {
+    let s;
+    [S { s, .. },] = a;
+}
+fn in_tuple_struct(a: T) {
+    let s;
+    T(S { s, .. }) = a;
+}
+            ",
+        );
+    }
+
+    #[test]
     fn range_mapping_out_of_macros() {
         check_fix(
             r#"
diff --git a/crates/rust-analyzer/src/cli/load_cargo.rs b/crates/rust-analyzer/src/cli/load_cargo.rs
index 4243af25ff1..0ada4b73e84 100644
--- a/crates/rust-analyzer/src/cli/load_cargo.rs
+++ b/crates/rust-analyzer/src/cli/load_cargo.rs
@@ -60,9 +60,9 @@ pub fn load_workspace(
 
     let proc_macro_client = if load_config.with_proc_macro {
         let path = AbsPathBuf::assert(std::env::current_exe()?);
-        Some(ProcMacroServer::spawn(path, &["proc-macro"]).unwrap())
+        Ok(ProcMacroServer::spawn(path, &["proc-macro"]).unwrap())
     } else {
-        None
+        Err("proc macro server not started".to_owned())
     };
 
     let crate_graph = ws.to_crate_graph(
@@ -89,7 +89,7 @@ pub fn load_workspace(
     if load_config.prefill_caches {
         host.analysis().parallel_prime_caches(1, |_| {})?;
     }
-    Ok((host, vfs, proc_macro_client))
+    Ok((host, vfs, proc_macro_client.ok()))
 }
 
 fn load_crate_graph(
diff --git a/crates/rust-analyzer/src/global_state.rs b/crates/rust-analyzer/src/global_state.rs
index 4af60035a20..8f881cba4db 100644
--- a/crates/rust-analyzer/src/global_state.rs
+++ b/crates/rust-analyzer/src/global_state.rs
@@ -61,7 +61,7 @@ pub(crate) struct GlobalState {
     pub(crate) proc_macro_changed: bool,
     pub(crate) last_reported_status: Option<lsp_ext::ServerStatusParams>,
     pub(crate) source_root_config: SourceRootConfig,
-    pub(crate) proc_macro_client: Option<ProcMacroServer>,
+    pub(crate) proc_macro_clients: Vec<Result<ProcMacroServer, String>>,
 
     pub(crate) flycheck: Vec<FlycheckHandle>,
     pub(crate) flycheck_sender: Sender<flycheck::Message>,
@@ -151,7 +151,7 @@ impl GlobalState {
             proc_macro_changed: false,
             last_reported_status: None,
             source_root_config: SourceRootConfig::default(),
-            proc_macro_client: None,
+            proc_macro_clients: vec![],
 
             flycheck: Vec::new(),
             flycheck_sender,
diff --git a/crates/rust-analyzer/src/handlers.rs b/crates/rust-analyzer/src/handlers.rs
index 520aa7d1dd4..deb777c952f 100644
--- a/crates/rust-analyzer/src/handlers.rs
+++ b/crates/rust-analyzer/src/handlers.rs
@@ -44,7 +44,7 @@ use crate::{
 };
 
 pub(crate) fn handle_workspace_reload(state: &mut GlobalState, _: ()) -> Result<()> {
-    state.proc_macro_client = None;
+    state.proc_macro_clients.clear();
     state.proc_macro_changed = false;
     state.fetch_workspaces_queue.request_op("reload workspace request".to_string());
     state.fetch_build_data_queue.request_op("reload workspace request".to_string());
diff --git a/crates/rust-analyzer/src/reload.rs b/crates/rust-analyzer/src/reload.rs
index 77125f88f47..e5802773e74 100644
--- a/crates/rust-analyzer/src/reload.rs
+++ b/crates/rust-analyzer/src/reload.rs
@@ -303,18 +303,21 @@ impl GlobalState {
         let files_config = self.config.files();
         let project_folders = ProjectFolders::new(&self.workspaces, &files_config.exclude);
 
-        if self.proc_macro_client.is_none() {
+        if self.proc_macro_clients.is_empty() {
             if let Some((path, args)) = self.config.proc_macro_srv() {
-                match ProcMacroServer::spawn(path.clone(), args) {
-                    Ok(it) => self.proc_macro_client = Some(it),
-                    Err(err) => {
-                        tracing::error!(
-                            "Failed to run proc_macro_srv from path {}, error: {:?}",
-                            path.display(),
-                            err
-                        );
-                    }
-                }
+                self.proc_macro_clients = (0..self.workspaces.len())
+                    .map(|_| {
+                        ProcMacroServer::spawn(path.clone(), args.clone()).map_err(|err| {
+                            let error = format!(
+                                "Failed to run proc_macro_srv from path {}, error: {:?}",
+                                path.display(),
+                                err
+                            );
+                            tracing::error!(error);
+                            error
+                        })
+                    })
+                    .collect();
             }
         }
 
@@ -331,15 +334,7 @@ impl GlobalState {
 
         // Create crate graph from all the workspaces
         let crate_graph = {
-            let proc_macro_client = self.proc_macro_client.as_ref();
             let dummy_replacements = self.config.dummy_replacements();
-            let mut load_proc_macro = move |crate_name: &str, path: &AbsPath| {
-                load_proc_macro(
-                    proc_macro_client,
-                    path,
-                    dummy_replacements.get(crate_name).map(|v| &**v).unwrap_or_default(),
-                )
-            };
 
             let vfs = &mut self.vfs.write().0;
             let loader = &mut self.loader;
@@ -359,7 +354,15 @@ impl GlobalState {
             };
 
             let mut crate_graph = CrateGraph::default();
-            for ws in self.workspaces.iter() {
+            for (idx, ws) in self.workspaces.iter().enumerate() {
+                let proc_macro_client = self.proc_macro_clients[idx].as_ref();
+                let mut load_proc_macro = move |crate_name: &str, path: &AbsPath| {
+                    load_proc_macro(
+                        proc_macro_client,
+                        path,
+                        dummy_replacements.get(crate_name).map(|v| &**v).unwrap_or_default(),
+                    )
+                };
                 crate_graph.extend(ws.to_crate_graph(&mut load_proc_macro, &mut load));
             }
             crate_graph
@@ -536,14 +539,14 @@ impl SourceRootConfig {
 /// Load the proc-macros for the given lib path, replacing all expanders whose names are in `dummy_replace`
 /// with an identity dummy expander.
 pub(crate) fn load_proc_macro(
-    server: Option<&ProcMacroServer>,
+    server: Result<&ProcMacroServer, &String>,
     path: &AbsPath,
     dummy_replace: &[Box<str>],
 ) -> ProcMacroLoadResult {
     let res: Result<Vec<_>, String> = (|| {
         let dylib = MacroDylib::new(path.to_path_buf())
             .map_err(|io| format!("Proc-macro dylib loading failed: {io}"))?;
-        let server = server.ok_or_else(|| format!("Proc-macro server not started"))?;
+        let server = server.map_err(ToOwned::to_owned)?;
         let vec = server.load_dylib(dylib).map_err(|e| format!("{e}"))?;
         if vec.is_empty() {
             return Err("proc macro library returned no proc macros".to_string());