The metadata part of TypeFeedbackVector is extracted to TypeFeedbackMetadata array.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index bc24f454e0db7a09a29356778416958236f94e22..6056fe31b8f752494b0e1502a315d1dbcb7b2f3a 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -2735,8 +2735,10 @@ void Heap::CreateInitialObjects() {
     DCHECK_EQ(keyed_store_ic_slot,
               FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot));
 
+    Handle<TypeFeedbackMetadata> dummy_metadata =
+        TypeFeedbackMetadata::New(isolate(), &spec);
     Handle<TypeFeedbackVector> dummy_vector =
-        TypeFeedbackVector::New(isolate(), &spec);
+        TypeFeedbackVector::New(isolate(), dummy_metadata);
 
     Object* megamorphic = *TypeFeedbackVector::MegamorphicSentinel(isolate());
     dummy_vector->Set(load_ic_slot, megamorphic, SKIP_WRITE_BARRIER);