diff --git a/src/builtins/BuiltinArrayBuffer.cpp b/src/builtins/BuiltinArrayBuffer.cpp
index 915c9e608..1655b1096 100644
--- a/src/builtins/BuiltinArrayBuffer.cpp
+++ b/src/builtins/BuiltinArrayBuffer.cpp
@@ -31,11 +31,13 @@ static Value builtinArrayBufferConstructor(ExecutionState& state, Value thisValu
 {
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     uint64_t byteLength = argv[0].toIndex(state);
     if (UNLIKELY(byteLength == Value::InvalidIndexValue)) {
         ErrorObject::throwBuiltinError(state, ErrorCode::RangeError, state.context()->staticStrings().ArrayBuffer.string(), false, String::emptyString, ErrorObject::Messages::GlobalObject_FirstArgumentInvalidLength);
+        return Value();
     }
 
     Optional<uint64_t> maxByteLength;
diff --git a/src/builtins/BuiltinDataView.cpp b/src/builtins/BuiltinDataView.cpp
index 8f620756e..19e60fca9 100644
--- a/src/builtins/BuiltinDataView.cpp
+++ b/src/builtins/BuiltinDataView.cpp
@@ -42,6 +42,7 @@ static Value builtinDataViewConstructor(ExecutionState& state, Value thisValue,
 {
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
     if (!(argv[0].isObject() && argv[0].asPointerValue()->isArrayBuffer())) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, state.context()->staticStrings().DataView.string(), false, String::emptyString, ErrorObject::Messages::GlobalObject_ThisNotArrayBufferObject);
diff --git a/src/builtins/BuiltinFinalizationRegistry.cpp b/src/builtins/BuiltinFinalizationRegistry.cpp
index 66a81a6d7..64845d0a2 100644
--- a/src/builtins/BuiltinFinalizationRegistry.cpp
+++ b/src/builtins/BuiltinFinalizationRegistry.cpp
@@ -36,6 +36,7 @@ static Value builtinFinalizationRegistryConstructor(ExecutionState& state, Value
 {
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
     if (argc == 0 || !argv[0].isCallable()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, "cleanup Callback is not callable");
diff --git a/src/builtins/BuiltinIntl.cpp b/src/builtins/BuiltinIntl.cpp
index 1d7243871..2048b79ea 100644
--- a/src/builtins/BuiltinIntl.cpp
+++ b/src/builtins/BuiltinIntl.cpp
@@ -449,6 +449,7 @@ static Value builtinIntlPluralRulesConstructor(ExecutionState& state, Value this
     // If NewTarget is undefined, throw a TypeError exception.
     if (!newTarget) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
 #if defined(ENABLE_RUNTIME_ICU_BINDER)
@@ -570,6 +571,7 @@ static Value builtinIntlLocaleConstructor(ExecutionState& state, Value thisValue
     // If NewTarget is undefined, throw a TypeError exception.
     if (!newTarget) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     Value tagValue = argv[0];
@@ -908,6 +910,7 @@ static Value builtinIntlRelativeTimeFormatConstructor(ExecutionState& state, Val
     // If NewTarget is undefined, throw a TypeError exception.
     if (!newTarget) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
 #if defined(ENABLE_RUNTIME_ICU_BINDER)
@@ -1002,6 +1005,7 @@ static Value builtinIntlDisplayNamesConstructor(ExecutionState& state, Value thi
     // If NewTarget is undefined, throw a TypeError exception.
     if (!newTarget) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     Object* proto = Object::getPrototypeFromConstructor(state, newTarget.value(), [](ExecutionState& state, Context* realm) -> Object* {
@@ -1046,6 +1050,7 @@ static Value builtinIntlListFormatConstructor(ExecutionState& state, Value thisV
     // If NewTarget is undefined, throw a TypeError exception.
     if (!newTarget) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     Object* proto = Object::getPrototypeFromConstructor(state, newTarget.value(), [](ExecutionState& state, Context* realm) -> Object* {
diff --git a/src/builtins/BuiltinMap.cpp b/src/builtins/BuiltinMap.cpp
index 5077e4d75..56894d4f9 100644
--- a/src/builtins/BuiltinMap.cpp
+++ b/src/builtins/BuiltinMap.cpp
@@ -31,6 +31,7 @@ static Value builtinMapConstructor(ExecutionState& state, Value thisValue, size_
 {
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     // Let map be ? OrdinaryCreateFromConstructor(NewTarget, "%MapPrototype%", « [[MapData]] »).
diff --git a/src/builtins/BuiltinSet.cpp b/src/builtins/BuiltinSet.cpp
index bb1d42c2d..efec19e3d 100644
--- a/src/builtins/BuiltinSet.cpp
+++ b/src/builtins/BuiltinSet.cpp
@@ -32,6 +32,7 @@ static Value builtinSetConstructor(ExecutionState& state, Value thisValue, size_
     // If NewTarget is undefined, throw a TypeError exception.
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     // Let set be ? OrdinaryCreateFromConstructor(NewTarget, "%SetPrototype%", « [[SetData]] »).
diff --git a/src/builtins/BuiltinTypedArray.cpp b/src/builtins/BuiltinTypedArray.cpp
index 719e547ae..1142c5cba 100644
--- a/src/builtins/BuiltinTypedArray.cpp
+++ b/src/builtins/BuiltinTypedArray.cpp
@@ -379,6 +379,7 @@ static Value builtinTypedArrayConstructor(ExecutionState& state, Value thisValue
         uint64_t elemlen = firstArg.toIndex(state);
         if (elemlen == Value::InvalidIndexValue) {
             ErrorObject::throwBuiltinError(state, ErrorCode::RangeError, state.context()->staticStrings().TypedArray.string(), false, String::emptyString, ErrorObject::Messages::GlobalObject_FirstArgumentInvalidLength);
+            return Value();
         }
         return TA::allocateTypedArray(state, newTarget.value(), elemlen);
     }
diff --git a/src/builtins/BuiltinWeakMap.cpp b/src/builtins/BuiltinWeakMap.cpp
index ae8c1e960..6f9d565bc 100644
--- a/src/builtins/BuiltinWeakMap.cpp
+++ b/src/builtins/BuiltinWeakMap.cpp
@@ -31,6 +31,7 @@ static Value builtinWeakMapConstructor(ExecutionState& state, Value thisValue, s
 {
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     Object* proto = Object::getPrototypeFromConstructor(state, newTarget.value(), [](ExecutionState& state, Context* constructorRealm) -> Object* {
diff --git a/src/builtins/BuiltinWeakRef.cpp b/src/builtins/BuiltinWeakRef.cpp
index 64a0b8915..72107ccee 100644
--- a/src/builtins/BuiltinWeakRef.cpp
+++ b/src/builtins/BuiltinWeakRef.cpp
@@ -30,6 +30,7 @@ static Value builtinWeakRefConstructor(ExecutionState& state, Value thisValue, s
 {
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
     if (argc == 0 || !argv[0].isObject()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, "target is not object");
diff --git a/src/builtins/BuiltinWeakSet.cpp b/src/builtins/BuiltinWeakSet.cpp
index 0fdffb6aa..6b981e3e8 100644
--- a/src/builtins/BuiltinWeakSet.cpp
+++ b/src/builtins/BuiltinWeakSet.cpp
@@ -32,6 +32,7 @@ static Value builtinWeakSetConstructor(ExecutionState& state, Value thisValue, s
 {
     if (!newTarget.hasValue()) {
         ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, ErrorObject::Messages::GlobalObject_ConstructorRequiresNew);
+        return Value();
     }
 
     Object* proto = Object::getPrototypeFromConstructor(state, newTarget.value(), [](ExecutionState& state, Context* constructorRealm) -> Object* {
diff --git a/src/interpreter/ByteCode.h b/src/interpreter/ByteCode.h
index 8f8bb854f..2179e686f 100644
--- a/src/interpreter/ByteCode.h
+++ b/src/interpreter/ByteCode.h
@@ -3004,7 +3004,7 @@ class End : public ByteCode {
 #ifndef NDEBUG
     void dump()
     {
-        printf("end(return with r[%u])", m_registerIndex);
+        printf("end(return with r%u)", m_registerIndex);
     }
 #endif
 };
diff --git a/src/interpreter/ByteCodeInterpreter.cpp b/src/interpreter/ByteCodeInterpreter.cpp
index c15d28e87..1b136ce85 100644
--- a/src/interpreter/ByteCodeInterpreter.cpp
+++ b/src/interpreter/ByteCodeInterpreter.cpp
@@ -3083,7 +3083,7 @@ NEVER_INLINE Value InterpreterSlowPath::tryOperation(ExecutionState*& state, siz
                         return Value();
                     }
                 } catch (const Value& val) {
-                    stackTraceDataVector = newState->context()->vmInstance()->currentSandBox()->stackTraceDataVector();
+                    stackTraceDataVector = std::move(newState->context()->vmInstance()->currentSandBox()->stackTraceDataVector());
                     newState->rareData()->m_controlFlowRecord->back() = new ControlFlowRecord(ControlFlowRecord::NeedsThrow, val);
                 }
             }
@@ -3156,7 +3156,7 @@ NEVER_INLINE Value InterpreterSlowPath::tryOperation(ExecutionState*& state, siz
                 return Value(Value::EmptyValue);
             }
         } else if (record->reason() == ControlFlowRecord::NeedsThrow) {
-            state->context()->vmInstance()->currentSandBox()->rethrowPreviouslyCaughtException(*state, record->value(), stackTraceDataVector);
+            state->context()->vmInstance()->currentSandBox()->rethrowPreviouslyCaughtException(*state, record->value(), std::move(stackTraceDataVector));
             ASSERT_NOT_REACHED();
             // never get here. but I add return statement for removing compile warning
             return Value(Value::EmptyValue);
diff --git a/src/parser/Script.cpp b/src/parser/Script.cpp
index 76b74c139..3f50cb240 100644
--- a/src/parser/Script.cpp
+++ b/src/parser/Script.cpp
@@ -85,6 +85,7 @@ Script* Script::loadModuleFromScript(ExecutionState& state, ModuleRequest& reque
     Platform::LoadModuleResult result = Global::platform()->onLoadModule(context(), this, request.m_specifier, request.m_type);
     if (!result.script) {
         ErrorObject::throwBuiltinError(state, (ErrorCode)result.errorCode, result.errorMessage->toNonGCUTF8StringData().data());
+        return nullptr;
     }
     if (!result.script->moduleData()->m_didCallLoadedCallback) {
         Global::platform()->didLoadModule(context(), this, result.script.value());
diff --git a/src/runtime/ExecutionState.cpp b/src/runtime/ExecutionState.cpp
index f91b068b9..c530056ce 100644
--- a/src/runtime/ExecutionState.cpp
+++ b/src/runtime/ExecutionState.cpp
@@ -197,6 +197,7 @@ Object* ExecutionState::findPrivateMemberContextObject()
     auto o = mostNearestHomeObject();
     if (!o) {
         ErrorObject::throwBuiltinError(*this, ErrorCode::TypeError, "Cannot read/write private member here");
+        return nullptr;
     }
     return convertHomeObjectIntoPrivateMemberContextObject(o.value());
 }
diff --git a/src/runtime/ScriptClassConstructorFunctionObject.cpp b/src/runtime/ScriptClassConstructorFunctionObject.cpp
index aa478e065..e32efdb2f 100644
--- a/src/runtime/ScriptClassConstructorFunctionObject.cpp
+++ b/src/runtime/ScriptClassConstructorFunctionObject.cpp
@@ -146,8 +146,7 @@ Value ScriptClassConstructorFunctionObject::construct(ExecutionState& state, con
     // Return envRec.GetThisBinding().
     // -> perform at ScriptClassConstructorFunctionObjectReturnValueBinderWithConstruct
     return FunctionObjectProcessCallGenerator::processCall<ScriptClassConstructorFunctionObject, true, true, true, ScriptClassConstructorFunctionObjectThisValueBinder,
-                                                           ScriptClassConstructorFunctionObjectNewTargetBinderWithConstruct, ScriptClassConstructorFunctionObjectReturnValueBinderWithConstruct>(state, this, thisArgument, argc, argv, newTarget)
-        .asObject();
+                                                           ScriptClassConstructorFunctionObjectNewTargetBinderWithConstruct, ScriptClassConstructorFunctionObjectReturnValueBinderWithConstruct>(state, this, thisArgument, argc, argv, newTarget);
 }
 
 void ScriptClassConstructorFunctionObject::initInstanceFieldMembers(ExecutionState& state, Object* instance)