new classes: assert that constructors are not callable and rewrite 'return;'

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 286f6fb798a0bb5175f962ac54a48366782cfd19..e1ce22214c0a858009c832b47c1a922fd61c2a60 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7197,6 +7197,7 @@ class SharedFunctionInfo: public HeapObject {
     kIsGenerator,
     kIsConciseMethod,
     kIsDefaultConstructor,
+    kIsBaseConstructor,
     kIsSubclassConstructor,
     kIsAsmFunction,
     kDeserialized,
@@ -7205,7 +7206,7 @@ class SharedFunctionInfo: public HeapObject {
   // Add hints for other modes when they're added.
   STATIC_ASSERT(LANGUAGE_END == 2);
 
-  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 5> {};
+  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 6> {};
 
   class DeoptCountBits : public BitField<int, 0, 4> {};
   class OptReenableTriesBits : public BitField<int, 4, 18> {};