diff --git a/ets2panda/compiler/lowering/scopesInit/scopesInitPhase.cpp b/ets2panda/compiler/lowering/scopesInit/scopesInitPhase.cpp
index e36ae97b91d21132b6e00a4ec2d7afd9ee9ccf41..b97fd7aed28f1faec6a85f3618f521220149f18a 100644
--- a/ets2panda/compiler/lowering/scopesInit/scopesInitPhase.cpp
+++ b/ets2panda/compiler/lowering/scopesInit/scopesInitPhase.cpp
@@ -238,6 +238,15 @@ void ScopesInitPhase::VisitVariableDeclarator(ir::VariableDeclarator *varDecl)
     auto init = varDecl->Id();
     std::vector<ir::Identifier *> bindings = util::Helpers::CollectBindingNames(VarBinder(), init);
     for (auto *binding : bindings) {
+        auto name = binding->Name();
+        if (binding->Variable() == nullptr && !name.Is(ERROR_LITERAL) && VarBinder()->IsETSBinder()) {
+            auto var = VarBinder()->GetScope()->FindLocal(name, varbinder::ResolveBindingOptions::ALL_VARIABLES);
+            if (var != nullptr) {
+                VarBinder()->ThrowRedeclaration(binding->Start(), name, var->Declaration()->Type());
+                continue;
+            }
+        }
+
         auto [decl, var] = AddOrGetVarDecl(varDecl->Flag(), binding);
         BindVarDecl(binding, init, decl, var);
     }
@@ -498,7 +507,7 @@ std::tuple<varbinder::Decl *, varbinder::Variable *> ScopesInitPhase::AddOrGetVa
         name = compiler::GenName(Allocator()).View();
     } else if (VarBinder()->IsETSBinder()) {
         if (auto var = scope->FindLocal(name, varbinder::ResolveBindingOptions::ALL_VARIABLES); var != nullptr) {
-            VarBinder()->ThrowRedeclaration(id->Start(), name, var->Declaration()->Type());
+            ES2PANDA_ASSERT(ctx_->diagnosticEngine->IsAnyError());
             return {var->Declaration(), var};
         }
     }
diff --git a/ets2panda/test/ast/compiler/ets/class_without_closing_parentheses.ets b/ets2panda/test/ast/compiler/ets/class_without_closing_parentheses.ets
index 4c4d1ca68c2f3f6c8f275eeda94077be514aa2bf..2926286b817fccaa6a16213dcdb5454341873c23 100644
--- a/ets2panda/test/ast/compiler/ets/class_without_closing_parentheses.ets
+++ b/ets2panda/test/ast/compiler/ets/class_without_closing_parentheses.ets
@@ -37,4 +37,4 @@ export default class TreeMap<K, V> implements ReadonlyTreeMap<K, V> {
 /* @@? 21:15 Error TypeError: Variable 'buffer' has already been declared. */
 /* @@? 21:15 Error TypeError: Merging declarations is not supported, please keep all definitions of classes, interfaces and enums compact in the codebase! */
 /* @@? 24:32 Error TypeError: Indexed access is not supported for such expression type. */
-/* @@? 26:20 Error TypeError: Cannot find type 'buffer'. */
+/* @@? 26:20 Error TypeError: Namespace 'buffer' cannot be used as a type. */
diff --git a/ets2panda/test/ast/compiler/ets/redecl_func_arow_param_in_body.ets b/ets2panda/test/ast/compiler/ets/redecl_func_arow_param_in_body.ets
new file mode 100644
index 0000000000000000000000000000000000000000..a0f98280f500bc543bcfad24cadfd07042e1dc8b
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/redecl_func_arow_param_in_body.ets
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the ermissions and
+ * limitatioLicense.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+function foo(bar: () => int) {
+    let x , bar();
+ }
+ 
+ function main(): void {
+   foo(() => {});
+ }
+
+/* @@? 18:11 Error SyntaxError: Variable must be initialized or it's type must be declared. */
+/* @@? 18:13 Error TypeError: Variable 'bar' has already been declared. */
+/* @@? 18:16 Error SyntaxError: Variable must be initialized or it's type must be declared. */
+/* @@? 18:16 Error SyntaxError: Unexpected token '('. */
+/* @@? 18:17 Error SyntaxError: Unexpected token ')'. */
+/* @@? 18:18 Error SyntaxError: Unexpected token, expected ')'. */
+/* @@? 22:14 Error TypeError: Type 'void' is not compatible with the enclosing method's return type 'Int' */