diff --git a/crates/hir/src/db.rs b/crates/hir/src/db.rs
index fa2e6dc5..61cb9cd0 100644
--- a/crates/hir/src/db.rs
+++ b/crates/hir/src/db.rs
@@ -3,11 +3,16 @@ use triomphe::Arc;
 
 use crate::{
     base_db::{salsa, source_db::SourceRootDb},
+    container::{InContainer, InSubroutine},
     def_id::{ModuleDef, ModuleDefId},
     file::HirFileId,
     hir_def::{
         block::{self, Block, BlockId, BlockLoc, BlockSourceMap},
-        expr::data_ty::{BuiltinDataTy, BuiltinDataTyId},
+        expr::{
+            ExprId,
+            data_ty::{BuiltinDataTy, BuiltinDataTyId},
+            declarator::DeclId,
+        },
         file::{self, FileSourceMap, HirFile},
         macro_file::{self, ExpansionInfo, MacroCallId, MacroCallLoc, MacroFileId, MacroFileLoc},
         module::{
@@ -16,10 +21,15 @@ use crate::{
                 self, GenerateBlock, GenerateBlockId, GenerateBlockLoc, GenerateBlockSourceMap,
             },
         },
-        subroutine::{self, Subroutine, SubroutineId, SubroutineLoc, SubroutineSourceMap},
+        subroutine::{
+            self, Subroutine, SubroutineId, SubroutineLoc, SubroutinePortId, SubroutineSourceMap,
+        },
+        typedef::TypedefId,
     },
     impl_intern_key, impl_intern_lookup,
     scope::{BlockScope, GenerateBlockScope, ModuleScope, SubroutineScope, UnitScope},
+    semantics::pathres::PathResolution,
+    type_infer::TyResult,
 };
 
 pub(crate) macro impl_intern($id:ident, $loc:ident, $intern:ident, $lookup:ident) {
@@ -120,6 +130,21 @@ pub trait HirDb: InternDb {
 
     #[salsa::invoke(SubroutineScope::subroutine_scope_query)]
     fn subroutine_scope(&self, subroutine_id: SubroutineId) -> Arc<SubroutineScope>;
+
+    #[salsa::invoke(crate::type_infer::type_of_decl_query)]
+    fn type_of_decl(&self, decl: InContainer<DeclId>) -> Arc<TyResult>;
+
+    #[salsa::invoke(crate::type_infer::type_of_typedef_query)]
+    fn type_of_typedef(&self, typedef: InContainer<TypedefId>) -> Arc<TyResult>;
+
+    #[salsa::invoke(crate::type_infer::type_of_expr_query)]
+    fn type_of_expr(&self, expr: InContainer<ExprId>) -> Arc<TyResult>;
+
+    #[salsa::invoke(crate::type_infer::type_of_path_resolution_query)]
+    fn type_of_path_resolution(&self, res: PathResolution) -> Arc<TyResult>;
+
+    #[salsa::invoke(crate::type_infer::type_of_subroutine_port_query)]
+    fn type_of_subroutine_port(&self, port: InSubroutine<SubroutinePortId>) -> Arc<TyResult>;
 }
 
 fn parse(db: &dyn HirDb, file_id: HirFileId) -> SyntaxTree {
diff --git a/crates/hir/src/semantics/pathres.rs b/crates/hir/src/semantics/pathres.rs
index b3dd8c9c..6c6372ae 100644
--- a/crates/hir/src/semantics/pathres.rs
+++ b/crates/hir/src/semantics/pathres.rs
@@ -70,7 +70,7 @@ pub fn resolve_name(db: &dyn HirDb, cont_id: ContainerId, ident: &Ident) -> Opti
     })
 }
 
-#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum PathResolution {
     Module(ModuleId),
     Config(InFile<ConfigDeclId>),
diff --git a/crates/hir/src/type_infer.rs b/crates/hir/src/type_infer.rs
index 2fbb0337..4bf8ba00 100644
--- a/crates/hir/src/type_infer.rs
+++ b/crates/hir/src/type_infer.rs
@@ -1,4 +1,5 @@
 use rustc_hash::FxHashSet;
+use triomphe::Arc;
 use utils::get::GetRef;
 
 use crate::{
@@ -40,7 +41,7 @@ pub enum Ty {
     Block(crate::hir_def::block::BlockId),
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct TyResult {
     pub ty: Ty,
     pub diagnostics: Vec<TyInferDiagnostic>,
@@ -75,30 +76,56 @@ pub fn normalize_data_ty(db: &dyn HirDb, container: ContainerId, data_ty: DataTy
     normalize_data_ty_inner(db, container, data_ty, &mut FxHashSet::default())
 }
 
-pub fn type_of_typedef(db: &dyn HirDb, typedef: InContainer<TypedefId>) -> TyResult {
+pub(crate) fn type_of_typedef_query(
+    db: &dyn HirDb,
+    typedef: InContainer<TypedefId>,
+) -> Arc<TyResult> {
+    Arc::new(type_of_typedef_impl(db, typedef))
+}
+
+pub(crate) fn type_of_decl_query(db: &dyn HirDb, decl: InContainer<DeclId>) -> Arc<TyResult> {
+    Arc::new(type_of_decl_impl(db, decl))
+}
+
+pub(crate) fn type_of_path_resolution_query(db: &dyn HirDb, res: PathResolution) -> Arc<TyResult> {
+    Arc::new(type_of_path_resolution_impl(db, res))
+}
+
+pub(crate) fn type_of_expr_query(db: &dyn HirDb, expr: InContainer<ExprId>) -> Arc<TyResult> {
+    Arc::new(type_of_expr_impl(db, expr))
+}
+
+pub(crate) fn type_of_subroutine_port_query(
+    db: &dyn HirDb,
+    port: InSubroutine<SubroutinePortId>,
+) -> Arc<TyResult> {
+    Arc::new(type_of_subroutine_port_impl(db, port))
+}
+
+fn type_of_typedef_impl(db: &dyn HirDb, typedef: InContainer<TypedefId>) -> TyResult {
     type_of_typedef_inner(db, typedef, &mut FxHashSet::default())
 }
 
-pub fn type_of_decl(db: &dyn HirDb, decl: InContainer<DeclId>) -> TyResult {
+fn type_of_decl_impl(db: &dyn HirDb, decl: InContainer<DeclId>) -> TyResult {
     let Some(data_ty) = data_ty_of_decl(db, decl) else {
         return TyResult::new(Ty::Unknown);
     };
     normalize_data_ty(db, decl.cont_id, data_ty)
 }
 
-pub fn type_of_path_resolution(db: &dyn HirDb, res: PathResolution) -> TyResult {
+fn type_of_path_resolution_impl(db: &dyn HirDb, res: PathResolution) -> TyResult {
     match res {
         PathResolution::Module(module_id) => TyResult::new(Ty::Module(module_id)),
-        PathResolution::Decl(decl) => type_of_decl(db, decl),
-        PathResolution::Typedef(typedef) => type_of_typedef(db, typedef),
+        PathResolution::Decl(decl) => type_of_decl_impl(db, decl),
+        PathResolution::Typedef(typedef) => type_of_typedef_impl(db, typedef),
         PathResolution::ParamDecl(decl) | PathResolution::AnsiPort(decl) => {
-            type_of_decl(db, decl.into())
+            type_of_decl_impl(db, decl.into())
         }
         PathResolution::NonAnsiPort { port_decl, data_decl, module, .. } => data_decl
             .or(port_decl)
-            .map(|decl| type_of_decl(db, InContainer::new(module.into(), decl)))
+            .map(|decl| type_of_decl_impl(db, InContainer::new(module.into(), decl)))
             .unwrap_or_else(|| TyResult::new(Ty::Unknown)),
-        PathResolution::SubroutinePort(port) => type_of_subroutine_port(db, port),
+        PathResolution::SubroutinePort(port) => type_of_subroutine_port_impl(db, port),
         PathResolution::Instance(instance) => {
             instance_target_module_id(db, instance.module_id, instance.value)
                 .map(|module_id| TyResult::new(Ty::Module(module_id)))
@@ -116,20 +143,20 @@ pub fn type_of_path_resolution(db: &dyn HirDb, res: PathResolution) -> TyResult
     }
 }
 
-pub fn type_of_expr(db: &dyn HirDb, expr: InContainer<ExprId>) -> TyResult {
+fn type_of_expr_impl(db: &dyn HirDb, expr: InContainer<ExprId>) -> TyResult {
     let Some(hir_expr) = expr_of(db, expr) else {
         return TyResult::new(Ty::Unknown);
     };
 
     match hir_expr {
         Expr::Ident(ident) => resolve_name(db, expr.cont_id, &ident)
-            .map(|res| type_of_path_resolution(db, res))
+            .map(|res| type_of_path_resolution_impl(db, res))
             .unwrap_or_else(|| TyResult::new(Ty::Unknown)),
         Expr::Field { receiver, field } => {
             let Some(field) = field else {
                 return TyResult::new(Ty::Unknown);
             };
-            let base = type_of_expr(db, expr.with_value(receiver));
+            let base = type_of_expr_impl(db, expr.with_value(receiver));
             if matches!(base.ty, Ty::Unknown | Ty::Error) {
                 return base;
             }
@@ -137,7 +164,7 @@ pub fn type_of_expr(db: &dyn HirDb, expr: InContainer<ExprId>) -> TyResult {
             selected.diagnostics.extend(base.diagnostics);
             selected
         }
-        Expr::ElementSelect { receiver, .. } => type_of_expr(db, expr.with_value(receiver)),
+        Expr::ElementSelect { receiver, .. } => type_of_expr_impl(db, expr.with_value(receiver)),
         Expr::Cast { ty, .. } => normalize_data_ty(db, expr.cont_id, ty),
         _ => TyResult::new(Ty::Unknown),
     }
@@ -276,7 +303,7 @@ fn type_of_named_data_ty(
 
     match resolve_name(db, container, &ident) {
         Some(PathResolution::Typedef(typedef)) => type_of_typedef_inner(db, typedef, seen),
-        Some(res) => type_of_path_resolution(db, res),
+        Some(res) => type_of_path_resolution_impl(db, res),
         None => TyResult::new(Ty::Unknown),
     }
 }
@@ -336,7 +363,7 @@ fn module_members(db: &dyn HirDb, module_id: ModuleId) -> Vec<TyMember> {
         .iter()
         .map(|(name, entry)| {
             let origin = PathResolution::from(InModule::new(module_id, entry));
-            let ty = type_of_path_resolution(db, origin).ty;
+            let ty = type_of_path_resolution_impl(db, origin).ty;
             TyMember { name: name.clone(), ty, origin: Some(origin) }
         })
         .collect();
@@ -350,7 +377,7 @@ fn generate_block_members(db: &dyn HirDb, generate_block_id: GenerateBlockId) ->
         .iter()
         .map(|(name, entry)| {
             let origin = PathResolution::from(InGenerateBlock::new(generate_block_id, entry));
-            let ty = type_of_path_resolution(db, origin).ty;
+            let ty = type_of_path_resolution_impl(db, origin).ty;
             TyMember { name: name.clone(), ty, origin: Some(origin) }
         })
         .collect();
@@ -364,7 +391,7 @@ fn block_members(db: &dyn HirDb, block_id: crate::hir_def::block::BlockId) -> Ve
         .iter()
         .map(|(name, entry)| {
             let origin = PathResolution::from(crate::container::InBlock::new(block_id, entry));
-            let ty = type_of_path_resolution(db, origin).ty;
+            let ty = type_of_path_resolution_impl(db, origin).ty;
             TyMember { name: name.clone(), ty, origin: Some(origin) }
         })
         .collect();
@@ -411,7 +438,7 @@ fn for_init_decl_ty(
     inits.iter().find_map(|(ty, decl)| (*decl == decl_id).then_some(*ty).flatten())
 }
 
-fn type_of_subroutine_port(db: &dyn HirDb, port: InSubroutine<SubroutinePortId>) -> TyResult {
+fn type_of_subroutine_port_impl(db: &dyn HirDb, port: InSubroutine<SubroutinePortId>) -> TyResult {
     let subroutine = db.subroutine(port.subroutine);
     let port_id = port;
     let Some(port) = subroutine.ports.get(port_id.value.0 as usize) else {
diff --git a/crates/ide/src/code_action/handlers/extract_variable.rs b/crates/ide/src/code_action/handlers/extract_variable.rs
index 1b260627..0ac1507b 100644
--- a/crates/ide/src/code_action/handlers/extract_variable.rs
+++ b/crates/ide/src/code_action/handlers/extract_variable.rs
@@ -3,8 +3,9 @@ use std::ops::Range;
 use hir::{
     base_db::source_db::SourceDb,
     container::InContainer,
+    db::HirDb,
     display::HirDisplay,
-    type_infer::{BuiltinTy, Ty, type_of_expr, type_of_path_resolution},
+    type_infer::{BuiltinTy, Ty},
 };
 use syntax::{
     SyntaxAncestors, SyntaxKind, TokenKind, WalkEvent,
@@ -176,7 +177,8 @@ fn trim_range(text: &str, range: TextRange) -> Option<TextRange> {
 }
 
 fn extracted_variable_type(ctx: &CodeActionCtx<'_>, expr: ast::Expression<'_>) -> Option<String> {
-    let ty = type_of_expr(ctx.sema().db, ctx.sema().resolve_expr(ctx.file_id().into(), expr)?).ty;
+    let ty =
+        ctx.sema().db.type_of_expr(ctx.sema().resolve_expr(ctx.file_id().into(), expr)?).ty.clone();
     render_ty(ctx, &ty)
         .or_else(|| expected_type_for_assignment_rhs(ctx, expr).and_then(|ty| render_ty(ctx, &ty)))
 }
@@ -189,7 +191,7 @@ fn expected_type_for_assignment_rhs(
     let res = ctx
         .sema()
         .expr_to_def(ctx.sema().resolve_expr(ctx.file_id().into(), assignment.left())?)?;
-    Some(type_of_path_resolution(ctx.sema().db, res).ty)
+    Some(ctx.sema().db.type_of_path_resolution(res).ty.clone())
 }
 
 fn render_ty(ctx: &CodeActionCtx<'_>, ty: &Ty) -> Option<String> {
diff --git a/crates/ide/src/completion/engine/expr.rs b/crates/ide/src/completion/engine/expr.rs
index 4eedd681..c38add31 100644
--- a/crates/ide/src/completion/engine/expr.rs
+++ b/crates/ide/src/completion/engine/expr.rs
@@ -14,7 +14,7 @@ use hir::{
         SubroutineEntry, UnitEntry,
     },
     semantics::{Semantics, pathres::PathResolution},
-    type_infer::{Ty, normalize_data_ty, type_class, type_of_decl, type_of_path_resolution},
+    type_infer::{Ty, normalize_data_ty, type_class},
 };
 use syntax::{
     SyntaxKind, SyntaxNode, SyntaxNodeExt,
@@ -122,7 +122,7 @@ fn collect_container_names(
                 match entry {
                     GenerateBlockEntry::DeclId(decl_id) => {
                         names.entry(ident.to_string()).or_insert(NameKind::Value {
-                            ty: type_of_decl(db, InContainer::new(container_id, decl_id)).ty,
+                            ty: db.type_of_decl(InContainer::new(container_id, decl_id)).ty.clone(),
                         });
                     }
                     GenerateBlockEntry::SubroutineId(subroutine_id) => {
@@ -139,7 +139,7 @@ fn collect_container_names(
             for (ident, entry) in scope.iter() {
                 if let BlockEntry::DeclId(decl_id) = entry {
                     names.entry(ident.to_string()).or_insert(NameKind::Value {
-                        ty: type_of_decl(db, InContainer::new(container_id, decl_id)).ty,
+                        ty: db.type_of_decl(InContainer::new(container_id, decl_id)).ty.clone(),
                     });
                 }
             }
@@ -150,18 +150,16 @@ fn collect_container_names(
                 match entry {
                     SubroutineEntry::DeclId(decl_id) => {
                         names.entry(ident.to_string()).or_insert(NameKind::Value {
-                            ty: type_of_decl(db, InContainer::new(container_id, decl_id)).ty,
+                            ty: db.type_of_decl(InContainer::new(container_id, decl_id)).ty.clone(),
                         });
                     }
                     SubroutineEntry::SubroutinePortId(port_id) => {
-                        let ty = type_of_path_resolution(
-                            db,
-                            PathResolution::SubroutinePort(InSubroutine::new(
-                                subroutine_id,
-                                port_id,
-                            )),
-                        )
-                        .ty;
+                        let ty = db
+                            .type_of_path_resolution(PathResolution::SubroutinePort(
+                                InSubroutine::new(subroutine_id, port_id),
+                            ))
+                            .ty
+                            .clone();
                         names.entry(ident.to_string()).or_insert(NameKind::Value { ty });
                     }
                     _ => {}
@@ -176,11 +174,10 @@ fn collect_file_names(db: &RootDb, file_id: HirFileId, names: &mut BTreeMap<Stri
     for (ident, entry) in scope.iter() {
         if let UnitEntry::FiledDeclId(decl_id) = entry {
             names.entry(ident.to_string()).or_insert(NameKind::Value {
-                ty: type_of_decl(
-                    db,
-                    InContainer::new(ContainerId::HirFileId(file_id), decl_id.value),
-                )
-                .ty,
+                ty: db
+                    .type_of_decl(InContainer::new(ContainerId::HirFileId(file_id), decl_id.value))
+                    .ty
+                    .clone(),
             });
         }
     }
@@ -192,18 +189,20 @@ fn collect_module_names(db: &RootDb, module_id: ModuleId, names: &mut BTreeMap<S
         match entry {
             ModuleEntry::DeclId(decl_id) => {
                 names.entry(ident.to_string()).or_insert(NameKind::Value {
-                    ty: type_of_decl(db, InContainer::new(module_id.into(), decl_id)).ty,
+                    ty: db.type_of_decl(InContainer::new(module_id.into(), decl_id)).ty.clone(),
                 });
             }
             ModuleEntry::AnsiPortEntry(AnsiPortEntry(decl_id)) => {
                 names.entry(ident.to_string()).or_insert(NameKind::Value {
-                    ty: type_of_decl(db, InContainer::new(module_id.into(), decl_id)).ty,
+                    ty: db.type_of_decl(InContainer::new(module_id.into(), decl_id)).ty.clone(),
                 });
             }
             ModuleEntry::NonAnsiPortEntry(NonAnsiPortEntry { port_decl, data_decl, .. }) => {
                 let ty = data_decl
                     .or(port_decl)
-                    .map(|decl_id| type_of_decl(db, InContainer::new(module_id.into(), decl_id)).ty)
+                    .map(|decl_id| {
+                        db.type_of_decl(InContainer::new(module_id.into(), decl_id)).ty.clone()
+                    })
                     .unwrap_or(Ty::Unknown);
                 names.entry(ident.to_string()).or_insert(NameKind::Value { ty });
             }
@@ -280,7 +279,7 @@ fn expected_type_for_assignment_rhs(
     }
 
     let res = sema.expr_to_def(sema.resolve_expr(file_id, assignment.left())?)?;
-    Some(type_of_path_resolution(db, res).ty)
+    Some(db.type_of_path_resolution(res).ty.clone())
 }
 
 fn expected_type_for_declarator_initializer(
@@ -301,7 +300,7 @@ fn expected_type_for_declarator_initializer(
     let ident = lower_ident_opt(declarator.name())?;
     let container_id = sema.container_for_node(file_id, declarator.syntax())?;
     let res = sema.name_to_def(InContainer::new(container_id, ident))?;
-    Some(type_of_path_resolution(db, res).ty)
+    Some(db.type_of_path_resolution(res).ty.clone())
 }
 
 fn is_assignment_expression(kind: SyntaxKind) -> bool {
diff --git a/crates/ide/src/completion/engine/member.rs b/crates/ide/src/completion/engine/member.rs
index 376d1d4a..ecc34164 100644
--- a/crates/ide/src/completion/engine/member.rs
+++ b/crates/ide/src/completion/engine/member.rs
@@ -1,7 +1,8 @@
 use hir::{
+    db::HirDb,
     file::HirFileId,
     semantics::Semantics,
-    type_infer::{TyMember, members_of_ty, type_of_expr, type_of_path_resolution},
+    type_infer::{TyMember, members_of_ty},
 };
 use syntax::{
     SyntaxAncestors, SyntaxNode, SyntaxNodeExt,
@@ -84,7 +85,8 @@ fn members_for_incomplete_scoped_access(
     }
     let left = root.token_before_offset(separator.text_range()?.start())?;
     let res = sema.nameres_ident(file_id, left)?;
-    let members = members_of_ty(db, &type_of_path_resolution(db, res).ty);
+    let ty = db.type_of_path_resolution(res);
+    let members = members_of_ty(db, &ty.ty);
     (!members.is_empty()).then_some(members)
 }
 
@@ -123,8 +125,8 @@ fn members_for_expr(
     file_id: HirFileId,
     expr: ast::Expression<'_>,
 ) -> Option<Vec<TyMember>> {
-    let ty = type_of_expr(db, sema.resolve_expr(file_id, expr)?).ty;
-    let members = members_of_ty(db, &ty);
+    let ty = db.type_of_expr(sema.resolve_expr(file_id, expr)?);
+    let members = members_of_ty(db, &ty.ty);
     (!members.is_empty()).then_some(members)
 }
 
diff --git a/crates/ide/src/completion/engine/typed_filter.rs b/crates/ide/src/completion/engine/typed_filter.rs
index 51baee45..3fd85613 100644
--- a/crates/ide/src/completion/engine/typed_filter.rs
+++ b/crates/ide/src/completion/engine/typed_filter.rs
@@ -9,9 +9,7 @@ use hir::{
     },
     scope::ModuleEntry,
     semantics::pathres::PathResolution,
-    type_infer::{
-        Ty, TyClass, packed_bit_width, type_class, type_of_decl, type_of_path_resolution,
-    },
+    type_infer::{Ty, TyClass, packed_bit_width, type_class},
 };
 use utils::get::GetRef;
 
@@ -27,11 +25,12 @@ pub(super) fn expected_port_ty(
 
     match entry {
         ModuleEntry::AnsiPortEntry(_) | ModuleEntry::NonAnsiPortEntry(_) => Some(
-            type_of_path_resolution(
-                db,
-                PathResolution::from(hir::container::InModule::new(target_module_id, entry)),
-            )
-            .ty,
+            db.type_of_path_resolution(PathResolution::from(hir::container::InModule::new(
+                target_module_id,
+                entry,
+            )))
+            .ty
+            .clone(),
         ),
         _ => None,
     }
@@ -58,7 +57,7 @@ pub(super) fn expected_param_ty(
     param_decl
         .kind
         .is_overridable()
-        .then(|| type_of_decl(db, InContainer::new(target_module_id.into(), decl_id)).ty)
+        .then(|| db.type_of_decl(InContainer::new(target_module_id.into(), decl_id)).ty.clone())
 }
 
 pub(super) fn value_candidates_in_module(db: &RootDb, module_id: ModuleId) -> Vec<(String, Ty)> {
@@ -73,7 +72,8 @@ pub(super) fn value_candidates_in_module(db: &RootDb, module_id: ModuleId) -> Ve
             | Declaration::SpecparamDecl(_) => {
                 for decl_id in decl.decls().clone() {
                     if let Some(name) = module.get(decl_id).name.as_ref() {
-                        let ty = type_of_decl(db, InContainer::new(module_id.into(), decl_id)).ty;
+                        let ty =
+                            db.type_of_decl(InContainer::new(module_id.into(), decl_id)).ty.clone();
                         candidates.push((name.to_string(), ty));
                     }
                 }
@@ -87,7 +87,8 @@ pub(super) fn value_candidates_in_module(db: &RootDb, module_id: ModuleId) -> Ve
             for (_, port_decl) in port_decls.iter() {
                 for decl_id in port_decl.decls.clone() {
                     if let Some(name) = module.get(decl_id).name.as_ref() {
-                        let ty = type_of_decl(db, InContainer::new(module_id.into(), decl_id)).ty;
+                        let ty =
+                            db.type_of_decl(InContainer::new(module_id.into(), decl_id)).ty.clone();
                         candidates.push((name.to_string(), ty));
                     }
                 }
@@ -97,7 +98,8 @@ pub(super) fn value_candidates_in_module(db: &RootDb, module_id: ModuleId) -> Ve
             for (_, port_decl) in decls.iter() {
                 for decl_id in port_decl.decls.clone() {
                     if let Some(name) = module.get(decl_id).name.as_ref() {
-                        let ty = type_of_decl(db, InContainer::new(module_id.into(), decl_id)).ty;
+                        let ty =
+                            db.type_of_decl(InContainer::new(module_id.into(), decl_id)).ty.clone();
                         candidates.push((name.to_string(), ty));
                     }
                 }
@@ -120,7 +122,7 @@ pub(super) fn const_candidates_in_module(db: &RootDb, module_id: ModuleId) -> Ve
         };
         for decl_id in param_decl.decls.clone() {
             if let Some(name) = module.get(decl_id).name.as_ref() {
-                let ty = type_of_decl(db, InContainer::new(module_id.into(), decl_id)).ty;
+                let ty = db.type_of_decl(InContainer::new(module_id.into(), decl_id)).ty.clone();
                 candidates.push((name.to_string(), ty));
             }
         }