Index: src/objects.cc |
diff --git a/src/objects.cc b/src/objects.cc |
index 4d08b7999ed27c317b41109f381eafb8d25575c3..01c0831b4ca5001950197e3931dc8a38a5d65889 100644 |
--- a/src/objects.cc |
+++ b/src/objects.cc |
@@ -4093,7 +4093,8 @@ void JSObject::AddProperty(Handle<JSObject> object, Handle<Name> name, |
ASSERT(!object->IsJSProxy()); |
ASSERT(!name->AsArrayIndex(&index)); |
LookupIterator it(object, name, LookupIterator::CHECK_OWN_REAL); |
- GetPropertyAttributes(&it); |
+ Maybe<PropertyAttributes> maybe = GetPropertyAttributes(&it); |
+ ASSERT(maybe.has_value); |
ASSERT(!it.IsFound()); |
ASSERT(object->map()->is_extensible()); |
#endif |