new classes: special construct stub for derived classs and TDZ for `this`.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index cb7b78f69dac90e13b9297c33a9040fee2811d58..b3a47b0fafc2b59fc9fd5eadcd8bd8b5f0a3d60a 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7189,12 +7189,13 @@ class SharedFunctionInfo: public HeapObject {
     kIsGenerator,
     kIsConciseMethod,
     kIsDefaultConstructor,
+    kIsSubclassConstructor,
     kIsAsmFunction,
     kDeserialized,
     kCompilerHintsCount  // Pseudo entry
   };
 
-  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 4> {};
+  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 5> {};
 
   class DeoptCountBits : public BitField<int, 0, 4> {};
   class OptReenableTriesBits : public BitField<int, 4, 18> {};