LibJS: Add an initialize binding hint to all initialize_binding methods

This will allow us to specify things like SyncDispose and perhaps
AsyncDispose in the future.

Userland/Libraries/LibJS/AST.cpp

@@ -323,7 +323,7 @@ Value FunctionExpression::instantiate_ordinary_function_expression(Interpreter&
     // FIXME: 7. Perform MakeConstructor(closure).
 
     if (has_own_name)
-        MUST(environment->initialize_binding(vm, name(), closure));
+        MUST(environment->initialize_binding(vm, name(), closure, Environment::InitializeBindingHint::Normal));
 
     return closure;
 }
@@ -1973,7 +1973,7 @@ ThrowCompletionOr<ECMAScriptFunctionObject*> ClassExpression::class_definition_e
     restore_environment.disarm();
 
     if (!binding_name.is_null())
-        MUST(class_environment->initialize_binding(vm, binding_name, class_constructor));
+        MUST(class_environment->initialize_binding(vm, binding_name, class_constructor, Environment::InitializeBindingHint::Normal));
 
     for (auto& field : instance_fields)
         class_constructor->add_field(field);
@@ -3864,7 +3864,7 @@ Completion TryStatement::execute(Interpreter& interpreter) const
         // 5. Let status be Completion(BindingInitialization of CatchParameter with arguments thrownValue and catchEnv).
         auto status = m_handler->parameter().visit(
             [&](DeprecatedFlyString const& parameter) {
-                return catch_environment->initialize_binding(vm, parameter, thrown_value);
+                return catch_environment->initialize_binding(vm, parameter, thrown_value, Environment::InitializeBindingHint::Normal);
             },
             [&](NonnullRefPtr<BindingPattern> const& pattern) {
                 return vm.binding_initialization(pattern, thrown_value, catch_environment);

Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp

@@ -205,8 +205,9 @@ ThrowCompletionOr<void> initialize_bound_name(VM& vm, DeprecatedFlyString const&
 {
     // 1. If environment is not undefined, then
     if (environment) {
-        // a. Perform ! environment.InitializeBinding(name, value).
-        MUST(environment->initialize_binding(vm, name, value));
+        // FIXME: The normal is not included in the explicit resource management spec yet, so there is no spec link for it.
+        // a. Perform ! environment.InitializeBinding(name, value, normal).
+        MUST(environment->initialize_binding(vm, name, value, Environment::InitializeBindingHint::Normal));
 
         // b. Return unused.
         return {};
@@ -729,6 +730,7 @@ ThrowCompletionOr<Value> perform_eval(VM& vm, Value x, CallerMode strict_caller,
 }
 
 // 19.2.1.3 EvalDeclarationInstantiation ( body, varEnv, lexEnv, privateEnv, strict ), https://tc39.es/ecma262/#sec-evaldeclarationinstantiation
+// 9.1.1.1 EvalDeclarationInstantiation ( body, varEnv, lexEnv, privateEnv, strict ), https://tc39.es/proposal-explicit-resource-management/#sec-evaldeclarationinstantiation
 ThrowCompletionOr<void> eval_declaration_instantiation(VM& vm, Program const& program, Environment* variable_environment, Environment* lexical_environment, PrivateEnvironment* private_environment, bool strict)
 {
     auto& realm = *vm.current_realm();
@@ -903,9 +905,9 @@ ThrowCompletionOr<void> eval_declaration_instantiation(VM& vm, Program const& pr
                     // ii. If bindingExists is false, then
                     if (!MUST(variable_environment->has_binding(function_name))) {
                         // i. Perform ! varEnv.CreateMutableBinding(F, true).
-                        // ii. Perform ! varEnv.InitializeBinding(F, undefined).
                         MUST(variable_environment->create_mutable_binding(vm, function_name, true));
-                        MUST(variable_environment->initialize_binding(vm, function_name, js_undefined()));
+                        // ii. Perform ! varEnv.InitializeBinding(F, undefined, normal).
+                        MUST(variable_environment->initialize_binding(vm, function_name, js_undefined(), Environment::InitializeBindingHint::Normal));
                     }
                 }
             }
@@ -1003,8 +1005,8 @@ ThrowCompletionOr<void> eval_declaration_instantiation(VM& vm, Program const& pr
                 // 2. Perform ! varEnv.CreateMutableBinding(fn, true).
                 MUST(variable_environment->create_mutable_binding(vm, declaration.name(), true));
 
-                // 3. Perform ! varEnv.InitializeBinding(fn, fo).
-                MUST(variable_environment->initialize_binding(vm, declaration.name(), function));
+                // 3. Perform ! varEnv.InitializeBinding(fn, fo, normal).
+                MUST(variable_environment->initialize_binding(vm, declaration.name(), function, Environment::InitializeBindingHint::Normal));
             }
             // iii. Else,
             else {
@@ -1033,8 +1035,8 @@ ThrowCompletionOr<void> eval_declaration_instantiation(VM& vm, Program const& pr
                 // 2. Perform ! varEnv.CreateMutableBinding(vn, true).
                 MUST(variable_environment->create_mutable_binding(vm, var_name, true));
 
-                // 3. Perform ! varEnv.InitializeBinding(vn, undefined).
-                MUST(variable_environment->initialize_binding(vm, var_name, js_undefined()));
+                // 3. Perform ! varEnv.InitializeBinding(vn, undefined, normal).
+                MUST(variable_environment->initialize_binding(vm, var_name, js_undefined(), Environment::InitializeBindingHint::Normal));
             }
         }
     }

Userland/Libraries/LibJS/Runtime/DeclarativeEnvironment.cpp

@@ -96,26 +96,25 @@ ThrowCompletionOr<void> DeclarativeEnvironment::create_immutable_binding(VM&, De
 }
 
 // 9.1.1.1.4 InitializeBinding ( N, V ), https://tc39.es/ecma262/#sec-declarative-environment-records-initializebinding-n-v
-ThrowCompletionOr<void> DeclarativeEnvironment::initialize_binding(VM& vm, DeprecatedFlyString const& name, Value value)
+// 4.1.1.1.1 InitializeBinding ( N, V, hint ), https://tc39.es/proposal-explicit-resource-management/#sec-declarative-environment-records
+ThrowCompletionOr<void> DeclarativeEnvironment::initialize_binding(VM&, DeprecatedFlyString const& name, Value value, Environment::InitializeBindingHint)
 {
     auto binding_and_index = find_binding_and_index(name);
     VERIFY(binding_and_index.has_value());
+    auto& binding = binding_and_index->binding();
 
-    return initialize_binding_direct(vm, binding_and_index->binding(), value);
-}
-
-ThrowCompletionOr<void> DeclarativeEnvironment::initialize_binding_direct(VM&, Binding& binding, Value value)
-{
     // 1. Assert: envRec must have an uninitialized binding for N.
     VERIFY(binding.initialized == false);
 
-    // 2. Set the bound value for N in envRec to V.
+    // FIXME: 2. If hint is not normal, perform ? AddDisposableResource(envRec, V, hint).
+
+    // 3. Set the bound value for N in envRec to V.
     binding.value = value;
 
-    // 3. Record that the binding for N in envRec has been initialized.
+    // 4. Record that the binding for N in envRec has been initialized.
     binding.initialized = true;
 
-    // 4. Return unused.
+    // 5. Return unused.
     return {};
 }
 
@@ -132,8 +131,8 @@ ThrowCompletionOr<void> DeclarativeEnvironment::set_mutable_binding(VM& vm, Depr
         // b. Perform ! envRec.CreateMutableBinding(N, true).
         MUST(create_mutable_binding(vm, name, true));
 
-        // c. Perform ! envRec.InitializeBinding(N, V).
-        MUST(initialize_binding(vm, name, value));
+        // c. Perform ! envRec.InitializeBinding(N, V, normal).
+        MUST(initialize_binding(vm, name, value, Environment::InitializeBindingHint::Normal));
 
         // d. Return unused.
         return {};
@@ -220,7 +219,7 @@ ThrowCompletionOr<void> DeclarativeEnvironment::initialize_or_set_mutable_bindin
     VERIFY(binding_and_index.has_value());
 
     if (!binding_and_index->binding().initialized)
-        TRY(initialize_binding(vm, name, value));
+        TRY(initialize_binding(vm, name, value, Environment::InitializeBindingHint::Normal));
     else
         TRY(set_mutable_binding(vm, name, value, false));
     return {};

Userland/Libraries/LibJS/Runtime/DeclarativeEnvironment.h

@@ -34,7 +34,7 @@ public:
     virtual ThrowCompletionOr<bool> has_binding(DeprecatedFlyString const& name, Optional<size_t>* = nullptr) const override;
     virtual ThrowCompletionOr<void> create_mutable_binding(VM&, DeprecatedFlyString const& name, bool can_be_deleted) override;
     virtual ThrowCompletionOr<void> create_immutable_binding(VM&, DeprecatedFlyString const& name, bool strict) override;
-    virtual ThrowCompletionOr<void> initialize_binding(VM&, DeprecatedFlyString const& name, Value) override;
+    virtual ThrowCompletionOr<void> initialize_binding(VM&, DeprecatedFlyString const& name, Value, InitializeBindingHint) override;
     virtual ThrowCompletionOr<void> set_mutable_binding(VM&, DeprecatedFlyString const& name, Value, bool strict) override;
     virtual ThrowCompletionOr<Value> get_binding_value(VM&, DeprecatedFlyString const& name, bool strict) override;
     virtual ThrowCompletionOr<bool> delete_binding(VM&, DeprecatedFlyString const& name) override;
@@ -60,7 +60,6 @@ public:
     void shrink_to_fit();
 
 private:
-    ThrowCompletionOr<void> initialize_binding_direct(VM&, Binding&, Value);
     ThrowCompletionOr<Value> get_binding_value_direct(VM&, Binding&, bool strict);
     ThrowCompletionOr<void> set_mutable_binding_direct(VM&, Binding&, Value, bool strict);
 

Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp

@@ -407,7 +407,7 @@ ThrowCompletionOr<void> ECMAScriptFunctionObject::function_declaration_instantia
 
         MUST(environment->create_mutable_binding(vm, parameter_name, false));
         if (has_duplicates)
-            MUST(environment->initialize_binding(vm, parameter_name, js_undefined()));
+            MUST(environment->initialize_binding(vm, parameter_name, js_undefined(), Environment::InitializeBindingHint::Normal));
     }
 
     if (arguments_object_needed) {
@@ -422,7 +422,7 @@ ThrowCompletionOr<void> ECMAScriptFunctionObject::function_declaration_instantia
         else
             MUST(environment->create_mutable_binding(vm, vm.names.arguments.as_string(), false));
 
-        MUST(environment->initialize_binding(vm, vm.names.arguments.as_string(), arguments_object));
+        MUST(environment->initialize_binding(vm, vm.names.arguments.as_string(), arguments_object, Environment::InitializeBindingHint::Normal));
         parameter_names.set(vm.names.arguments.as_string());
     }
 
@@ -488,7 +488,7 @@ ThrowCompletionOr<void> ECMAScriptFunctionObject::function_declaration_instantia
             scope_body->for_each_var_declared_name([&](auto const& name) {
                 if (!parameter_names.contains(name) && instantiated_var_names.set(name) == AK::HashSetResult::InsertedNewEntry) {
                     MUST(environment->create_mutable_binding(vm, name, false));
-                    MUST(environment->initialize_binding(vm, name, js_undefined()));
+                    MUST(environment->initialize_binding(vm, name, js_undefined(), Environment::InitializeBindingHint::Normal));
                 }
             });
         }
@@ -509,7 +509,7 @@ ThrowCompletionOr<void> ECMAScriptFunctionObject::function_declaration_instantia
                 else
                     initial_value = MUST(environment->get_binding_value(vm, name, false));
 
-                MUST(var_environment->initialize_binding(vm, name, initial_value));
+                MUST(var_environment->initialize_binding(vm, name, initial_value, Environment::InitializeBindingHint::Normal));
             });
         }
     }
@@ -523,7 +523,7 @@ ThrowCompletionOr<void> ECMAScriptFunctionObject::function_declaration_instantia
             // The spec says 'initializedBindings' here but that does not exist and it then adds it to 'instantiatedVarNames' so it probably means 'instantiatedVarNames'.
             if (!instantiated_var_names.contains(function_name) && function_name != vm.names.arguments.as_string()) {
                 MUST(var_environment->create_mutable_binding(vm, function_name, false));
-                MUST(var_environment->initialize_binding(vm, function_name, js_undefined()));
+                MUST(var_environment->initialize_binding(vm, function_name, js_undefined(), Environment::InitializeBindingHint::Normal));
                 instantiated_var_names.set(function_name);
             }
 

Userland/Libraries/LibJS/Runtime/Environment.h

@@ -23,6 +23,11 @@ class Environment : public Cell {
     JS_CELL(Environment, Cell);
 
 public:
+    enum class InitializeBindingHint {
+        Normal,
+        SyncDispose,
+    };
+
     virtual bool has_this_binding() const { return false; }
     virtual ThrowCompletionOr<Value> get_this_binding(VM&) const { return Value {}; }
 
@@ -31,7 +36,7 @@ public:
     virtual ThrowCompletionOr<bool> has_binding([[maybe_unused]] DeprecatedFlyString const& name, [[maybe_unused]] Optional<size_t>* out_index = nullptr) const { return false; }
     virtual ThrowCompletionOr<void> create_mutable_binding(VM&, [[maybe_unused]] DeprecatedFlyString const& name, [[maybe_unused]] bool can_be_deleted) { return {}; }
     virtual ThrowCompletionOr<void> create_immutable_binding(VM&, [[maybe_unused]] DeprecatedFlyString const& name, [[maybe_unused]] bool strict) { return {}; }
-    virtual ThrowCompletionOr<void> initialize_binding(VM&, [[maybe_unused]] DeprecatedFlyString const& name, Value) { return {}; }
+    virtual ThrowCompletionOr<void> initialize_binding(VM&, [[maybe_unused]] DeprecatedFlyString const& name, Value, InitializeBindingHint) { return {}; }
     virtual ThrowCompletionOr<void> set_mutable_binding(VM&, [[maybe_unused]] DeprecatedFlyString const& name, Value, [[maybe_unused]] bool strict) { return {}; }
     virtual ThrowCompletionOr<Value> get_binding_value(VM&, [[maybe_unused]] DeprecatedFlyString const& name, [[maybe_unused]] bool strict) { return Value {}; }
     virtual ThrowCompletionOr<bool> delete_binding(VM&, [[maybe_unused]] DeprecatedFlyString const& name) { return false; }

Userland/Libraries/LibJS/Runtime/GlobalEnvironment.cpp

@@ -78,20 +78,22 @@ ThrowCompletionOr<void> GlobalEnvironment::create_immutable_binding(VM& vm, Depr
     return MUST(m_declarative_record->create_immutable_binding(vm, name, strict));
 }
 
-// 9.1.1.4.4 InitializeBinding ( N, V ), https://tc39.es/ecma262/#sec-global-environment-records-initializebinding-n-v
-ThrowCompletionOr<void> GlobalEnvironment::initialize_binding(VM& vm, DeprecatedFlyString const& name, Value value)
+// 9.1.1.4.4 InitializeBinding ( N, V, hint ), https://tc39.es/ecma262/#sec-global-environment-records-initializebinding-n-v
+ThrowCompletionOr<void> GlobalEnvironment::initialize_binding(VM& vm, DeprecatedFlyString const& name, Value value, InitializeBindingHint hint)
 {
     // 1. Let DclRec be envRec.[[DeclarativeRecord]].
     // 2. If ! DclRec.HasBinding(N) is true, then
     if (MUST(m_declarative_record->has_binding(name))) {
-        // a. Return ! DclRec.InitializeBinding(N, V).
-        return MUST(m_declarative_record->initialize_binding(vm, name, value));
+        // a. Return ! DclRec.InitializeBinding(N, V, hint).
+        return MUST(m_declarative_record->initialize_binding(vm, name, value, hint));
     }
 
     // 3. Assert: If the binding exists, it must be in the object Environment Record.
-    // 4. Let ObjRec be envRec.[[ObjectRecord]].
-    // 5. Return ? ObjRec.InitializeBinding(N, V).
-    return m_object_record->initialize_binding(vm, name, value);
+    // 4. Assert: hint is normal.
+    VERIFY(hint == Environment::InitializeBindingHint::Normal);
+    // 5. Let ObjRec be envRec.[[ObjectRecord]].
+    // 6. Return ? ObjRec.InitializeBinding(N, V, normal).
+    return m_object_record->initialize_binding(vm, name, value, Environment::InitializeBindingHint::Normal);
 }
 
 // 9.1.1.4.5 SetMutableBinding ( N, V, S ), https://tc39.es/ecma262/#sec-global-environment-records-setmutablebinding-n-v-s
@@ -263,8 +265,8 @@ ThrowCompletionOr<void> GlobalEnvironment::create_global_var_binding(DeprecatedF
         // a. Perform ? ObjRec.CreateMutableBinding(N, D).
         TRY(m_object_record->create_mutable_binding(vm, name, can_be_deleted));
 
-        // b. Perform ? ObjRec.InitializeBinding(N, undefined).
-        TRY(m_object_record->initialize_binding(vm, name, js_undefined()));
+        // b. Perform ? ObjRec.InitializeBinding(N, undefined, normal).
+        TRY(m_object_record->initialize_binding(vm, name, js_undefined(), Environment::InitializeBindingHint::Normal));
     }
 
     // 6. Let varDeclaredNames be envRec.[[VarNames]].

Userland/Libraries/LibJS/Runtime/GlobalEnvironment.h

@@ -20,7 +20,7 @@ public:
     virtual ThrowCompletionOr<bool> has_binding(DeprecatedFlyString const& name, Optional<size_t>* = nullptr) const override;
     virtual ThrowCompletionOr<void> create_mutable_binding(VM&, DeprecatedFlyString const& name, bool can_be_deleted) override;
     virtual ThrowCompletionOr<void> create_immutable_binding(VM&, DeprecatedFlyString const& name, bool strict) override;
-    virtual ThrowCompletionOr<void> initialize_binding(VM&, DeprecatedFlyString const& name, Value) override;
+    virtual ThrowCompletionOr<void> initialize_binding(VM&, DeprecatedFlyString const& name, Value, Environment::InitializeBindingHint) override;
     virtual ThrowCompletionOr<void> set_mutable_binding(VM&, DeprecatedFlyString const& name, Value, bool strict) override;
     virtual ThrowCompletionOr<Value> get_binding_value(VM&, DeprecatedFlyString const& name, bool strict) override;
     virtual ThrowCompletionOr<bool> delete_binding(VM&, DeprecatedFlyString const& name) override;

Userland/Libraries/LibJS/Runtime/ObjectEnvironment.cpp

@@ -77,9 +77,12 @@ ThrowCompletionOr<void> ObjectEnvironment::create_immutable_binding(VM&, Depreca
 }
 
 // 9.1.1.2.4 InitializeBinding ( N, V ), https://tc39.es/ecma262/#sec-object-environment-records-initializebinding-n-v
-ThrowCompletionOr<void> ObjectEnvironment::initialize_binding(VM& vm, DeprecatedFlyString const& name, Value value)
+ThrowCompletionOr<void> ObjectEnvironment::initialize_binding(VM& vm, DeprecatedFlyString const& name, Value value, Environment::InitializeBindingHint hint)
 {
-    // 1. Perform ? envRec.SetMutableBinding(N, V, false).
+    // 1. Assert: hint is normal.
+    VERIFY(hint == Environment::InitializeBindingHint::Normal);
+
+    // 2. Perform ? envRec.SetMutableBinding(N, V, false).
     TRY(set_mutable_binding(vm, name, value, false));
 
     // 2. Return unused.

Userland/Libraries/LibJS/Runtime/ObjectEnvironment.h

@@ -22,7 +22,7 @@ public:
     virtual ThrowCompletionOr<bool> has_binding(DeprecatedFlyString const& name, Optional<size_t>* = nullptr) const override;
     virtual ThrowCompletionOr<void> create_mutable_binding(VM&, DeprecatedFlyString const& name, bool can_be_deleted) override;
     virtual ThrowCompletionOr<void> create_immutable_binding(VM&, DeprecatedFlyString const& name, bool strict) override;
-    virtual ThrowCompletionOr<void> initialize_binding(VM&, DeprecatedFlyString const& name, Value) override;
+    virtual ThrowCompletionOr<void> initialize_binding(VM&, DeprecatedFlyString const& name, Value, Environment::InitializeBindingHint) override;
     virtual ThrowCompletionOr<void> set_mutable_binding(VM&, DeprecatedFlyString const& name, Value, bool strict) override;
     virtual ThrowCompletionOr<Value> get_binding_value(VM&, DeprecatedFlyString const& name, bool strict) override;
     virtual ThrowCompletionOr<bool> delete_binding(VM&, DeprecatedFlyString const& name) override;

Userland/Libraries/LibJS/Runtime/Reference.cpp

@@ -231,11 +231,12 @@ DeprecatedString Reference::to_deprecated_string() const
 }
 
 // 6.2.4.8 InitializeReferencedBinding ( V, W ), https://tc39.es/ecma262/#sec-object.prototype.hasownproperty
-ThrowCompletionOr<void> Reference::initialize_referenced_binding(VM& vm, Value value) const
+// 1.2.1.1 InitializeReferencedBinding ( V, W, hint ), https://tc39.es/proposal-explicit-resource-management/#sec-initializereferencedbinding
+ThrowCompletionOr<void> Reference::initialize_referenced_binding(VM& vm, Value value, Environment::InitializeBindingHint hint) const
 {
     VERIFY(!is_unresolvable());
     VERIFY(m_base_type == BaseType::Environment);
-    return m_base_environment->initialize_binding(vm, m_name.as_string(), value);
+    return m_base_environment->initialize_binding(vm, m_name.as_string(), value, hint);
 }
 
 // 6.2.4.9 MakePrivateReference ( baseValue, privateIdentifier ), https://tc39.es/ecma262/#sec-makeprivatereference

Userland/Libraries/LibJS/Runtime/Reference.h

@@ -121,7 +121,7 @@ public:
         return m_base_type == BaseType::Environment;
     }
 
-    ThrowCompletionOr<void> initialize_referenced_binding(VM&, Value value) const;
+    ThrowCompletionOr<void> initialize_referenced_binding(VM&, Value value, Environment::InitializeBindingHint hint = Environment::InitializeBindingHint::Normal) const;
 
     ThrowCompletionOr<void> put_value(VM&, Value);
     ThrowCompletionOr<Value> get_value(VM&) const;

Userland/Libraries/LibJS/SourceTextModule.cpp

@@ -367,8 +367,8 @@ ThrowCompletionOr<void> SourceTextModule::initialize_environment(VM& vm)
             // ii. Perform ! env.CreateImmutableBinding(in.[[LocalName]], true).
             MUST(environment->create_immutable_binding(vm, import_entry.local_name, true));
 
-            // iii. Perform ! env.InitializeBinding(in.[[LocalName]], namespace).
-            MUST(environment->initialize_binding(vm, import_entry.local_name, namespace_));
+            // iii. Perform ! env.InitializeBinding(in.[[LocalName]], namespace, normal).
+            MUST(environment->initialize_binding(vm, import_entry.local_name, namespace_, Environment::InitializeBindingHint::Normal));
         }
         // d. Else,
         else {
@@ -387,8 +387,8 @@ ThrowCompletionOr<void> SourceTextModule::initialize_environment(VM& vm)
                 // 2. Perform ! env.CreateImmutableBinding(in.[[LocalName]], true).
                 MUST(environment->create_immutable_binding(vm, import_entry.local_name, true));
 
-                // 3. Perform ! env.InitializeBinding(in.[[LocalName]], namespace).
-                MUST(environment->initialize_binding(vm, import_entry.local_name, namespace_));
+                // 3. Perform ! env.InitializeBinding(in.[[LocalName]], namespace, normal).
+                MUST(environment->initialize_binding(vm, import_entry.local_name, namespace_, Environment::InitializeBindingHint::Normal));
             }
             // iv. Else,
             else {
@@ -442,8 +442,8 @@ ThrowCompletionOr<void> SourceTextModule::initialize_environment(VM& vm)
             // 1. Perform ! env.CreateMutableBinding(dn, false).
             MUST(environment->create_mutable_binding(vm, name, false));
 
-            // 2. Perform ! env.InitializeBinding(dn, undefined).
-            MUST(environment->initialize_binding(vm, name, js_undefined()));
+            // 2. Perform ! env.InitializeBinding(dn, undefined, normal).
+            MUST(environment->initialize_binding(vm, name, js_undefined(), Environment::InitializeBindingHint::Normal));
 
             // 3. Append dn to declaredVarNames.
             declared_var_names.empend(name);
@@ -484,8 +484,8 @@ ThrowCompletionOr<void> SourceTextModule::initialize_environment(VM& vm)
                     function_name = "default"sv;
                 auto function = ECMAScriptFunctionObject::create(realm(), function_name, function_declaration.source_text(), function_declaration.body(), function_declaration.parameters(), function_declaration.function_length(), environment, private_environment, function_declaration.kind(), function_declaration.is_strict_mode(), function_declaration.might_need_arguments_object(), function_declaration.contains_direct_call_to_eval());
 
-                // 2. Perform ! env.InitializeBinding(dn, fo).
-                MUST(environment->initialize_binding(vm, name, function));
+                // 2. Perform ! env.InitializeBinding(dn, fo, normal).
+                MUST(environment->initialize_binding(vm, name, function, Environment::InitializeBindingHint::Normal));
             }
         });
     });

Userland/Libraries/LibJS/SyntheticModule.cpp

@@ -61,8 +61,8 @@ ThrowCompletionOr<void> SyntheticModule::link(VM& vm)
         // a. Perform ! envRec.CreateMutableBinding(exportName, false).
         MUST(environment->create_mutable_binding(vm, export_name, false));
 
-        // b. Perform ! envRec.InitializeBinding(exportName, undefined).
-        MUST(environment->initialize_binding(vm, export_name, js_undefined()));
+        // b. Perform ! envRec.InitializeBinding(exportName, undefined, normal).
+        MUST(environment->initialize_binding(vm, export_name, js_undefined(), Environment::InitializeBindingHint::Normal));
     }
 
     // 6. Return unused.