[ic] Use validity cells to protect keyed element stores against object's prototype chain modificati…

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 94e0b99e30921782d43764e18d7d95a3281272b3..18c40456760d45e8b018c1606f764581ff949b62 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -1272,6 +1272,13 @@ void PrototypeInfo::PrototypeInfoPrint(std::ostream& os) {  // NOLINT
   os << "\n";
 }
 
+void Tuple2::Tuple2Print(std::ostream& os) {  // NOLINT
+  HeapObject::PrintHeader(os, "Tuple2");
+  os << "\n - value1: " << Brief(value1());
+  os << "\n - value2: " << Brief(value2());
+  os << "\n";
+}
+
 void Tuple3::Tuple3Print(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "Tuple3");
   os << "\n - value1: " << Brief(value1());