[left-trimming] Avoid creating duplicate handles in builtins.cc

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 1c596503ef86e95bf3b6e3054ade3c484ae4a661..c4d99b508cf39103d306236031d04313ea081381 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -251,6 +251,9 @@ MUST_USE_RESULT
 inline MaybeHandle<FixedArrayBase> EnsureJSArrayWithWritableFastElements(
     Isolate* isolate, Handle<Object> receiver, Arguments* args,
     int first_added_arg) {
+  // We explicitly add a HandleScope to avoid creating several copies of the
+  // same handle which would otherwise cause issue when left-trimming later-on.
+  HandleScope scope(isolate);
   if (!receiver->IsJSArray()) return MaybeHandle<FixedArrayBase>();
   Handle<JSArray> array = Handle<JSArray>::cast(receiver);
   // If there may be elements accessors in the prototype chain, the fast path