[key-accumulator] Starting to reimplement the key-accumulator

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 49b746b42362e3b5dc1f9eb521b85d331fe5fad9..aac2bbbf3c5966a45cbc2c8363f9952e99b18e08 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -454,6 +454,12 @@ void Map::MapPrint(std::ostream& os) {  // NOLINT
   }
   os << "\n - elements kind: " << ElementsKindToString(elements_kind());
   os << "\n - unused property fields: " << unused_property_fields();
+  os << "\n - enum length: ";
+  if (EnumLength() == kInvalidEnumCacheSentinel) {
+    os << "invalid";
+  } else {
+    os << EnumLength();
+  }
   if (is_deprecated()) os << "\n - deprecated_map";
   if (is_stable()) os << "\n - stable_map";
   if (is_dictionary_map()) os << "\n - dictionary_map";