Classes: Partial fix for constructor not calling super

src/preparser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PREPARSER_H
 #define V8_PREPARSER_H
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
@@ skipping 1307 matching lines @@
     return PreParserExpression::Super();
   }
 
   static PreParserExpression ClassExpression(
       PreParserIdentifier name, PreParserExpression extends,
       PreParserExpression constructor, PreParserExpressionList properties,
       int start_position, int end_position, PreParserFactory* factory) {
     return PreParserExpression::Default();
   }
 
+  static PreParserExpression DefaultConstructor(bool call_super,
+                                                PreParserScope* scope, int pos,
+                                                int end_pos) {
+    return PreParserExpression::Default();
+  }
+
   static PreParserExpression ExpressionFromLiteral(
       Token::Value token, int pos, Scanner* scanner,
       PreParserFactory* factory) {
     return PreParserExpression::Default();
   }
 
   static PreParserExpression ExpressionFromIdentifier(
       PreParserIdentifier name, int pos, PreParserScope* scope,
       PreParserFactory* factory) {
     return PreParserExpression::FromIdentifier(name);
@@ skipping 1402 matching lines @@
     ReportMessageAt(class_name_location, "unexpected_strict_reserved");
     *ok = false;
     return this->EmptyExpression();
   }
   if (this->IsEvalOrArguments(name)) {
     ReportMessageAt(class_name_location, "strict_eval_arguments");
     *ok = false;
     return this->EmptyExpression();
   }
 
+  bool has_extends = false;
   ExpressionT extends = this->EmptyExpression();
   if (Check(Token::EXTENDS)) {
     typename Traits::Type::ScopePtr scope = this->NewScope(scope_, BLOCK_SCOPE);
     BlockState block_state(&scope_, Traits::Type::ptr_to_scope(scope));
     scope_->SetStrictMode(STRICT);
     extends = this->ParseLeftHandSideExpression(CHECK_OK);
+    has_extends = true;
   }
 
   // TODO(arv): Implement scopes and name binding in class body only.
   typename Traits::Type::ScopePtr scope = this->NewScope(scope_, BLOCK_SCOPE);
   BlockState block_state(&scope_, Traits::Type::ptr_to_scope(scope));
   scope_->SetStrictMode(STRICT);
   scope_->SetScopeName(name);
 
   typename Traits::Type::PropertyList properties =
       this->NewPropertyList(4, zone_);
@@ skipping 18 matching lines @@
 
     if (fni_ != NULL) {
       fni_->Infer();
       fni_->Leave();
     }
   }
 
   int end_pos = peek_position();
   Expect(Token::RBRACE, CHECK_OK);
 
+  if (!has_seen_constructor) {
+    constructor =
+        this->DefaultConstructor(has_extends, scope_, pos, end_pos + 1);
+  }
+
   return this->ClassExpression(name, extends, constructor, properties, pos,
                                end_pos + 1, factory());
 }
 
 
 template <typename Traits>
 typename ParserBase<Traits>::ExpressionT
 ParserBase<Traits>::CheckAndRewriteReferenceExpression(
     ExpressionT expression,
     Scanner::Location location, const char* message, bool* ok) {
@@ skipping 44 matching lines @@
       DCHECK(IsAccessorAccessorConflict(old_type, type));
       // Both accessors of the same type.
       parser()->ReportMessage("accessor_get_set");
     }
     *ok = false;
   }
 }
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H