Also check new_target_is_base() bit when comparing two maps for equivalence.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index bdf9a6c0f301a91f8abde905d738e49d2dba7ac7..f41283962f02e272a53c83db97babe357b62eae4 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -12232,6 +12232,7 @@ bool CheckEquivalent(Map* first, Map* second) {
          first->bit_field() == second->bit_field() &&
          first->is_extensible() == second->is_extensible() &&
          first->is_strong() == second->is_strong() &&
+         first->new_target_is_base() == second->new_target_is_base() &&
          first->is_hidden_prototype() == second->is_hidden_prototype();
 }