Classes: Fix issue with default constructor crash

src/parser.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/api.h"
 #include "src/ast.h"
 #include "src/bailout-reason.h"
 #include "src/base/platform/platform.h"
@@ skipping 630 matching lines @@
 }
 
 Expression* ParserTraits::ClassExpression(
     const AstRawString* name, Expression* extends, Expression* constructor,
     ZoneList<ObjectLiteral::Property*>* properties, int start_position,
     int end_position, AstNodeFactory<AstConstructionVisitor>* factory) {
   return factory->NewClassLiteral(name, extends, constructor, properties,
                                   start_position, end_position);
 }
 
+
+Expression* ParserTraits::DefaultConstructor(
+    bool call_super, Scope* scope,
+    AstNodeFactory<AstConstructionVisitor>* factory) {
+  Scope* function_scope = NewScope(scope, FUNCTION_SCOPE);
+  // Set position and force eager compilation since lazy parsing tries to
+  // parse the content which does not exist.
+  function_scope->set_start_position(0);
+  function_scope->set_end_position(0);
+  // function_scope->SetScopeName(name);
+  function_scope->ForceEagerCompilation();
+
+  int pos = RelocInfo::kNoPosition;
+
+  Zone* zone = parser_->zone();
+  ZoneList<Statement*>* body = new (zone) ZoneList<Statement*>(1, zone);
+  if (call_super) {
+    Expression* prop = SuperReference(function_scope, factory, pos);
+    ZoneList<Expression*>* args = new (zone) ZoneList<Expression*>(0, zone);
+    Expression* call_expression = factory->NewCall(prop, args, pos);
+    body->Add(factory->NewExpressionStatement(call_expression, pos), zone);
+  }
+
+  int materialized_literal_count = 0;
+  int expected_property_count = 0;
+  int handler_count = 0;
+  int parameter_count = 0;
+
+  const AstRawString* name = ast_value_factory()->empty_string();
+
+  return factory->NewFunctionLiteral(
+      name, ast_value_factory(), function_scope, body,
+      materialized_literal_count, expected_property_count, handler_count,
+      parameter_count, FunctionLiteral::kNoDuplicateParameters,
+      FunctionLiteral::ANONYMOUS_EXPRESSION, FunctionLiteral::kIsFunction,
+      FunctionLiteral::kNotParenthesized, FunctionKind::kNormalFunction, pos);
+}
+
+
 Literal* ParserTraits::ExpressionFromLiteral(
     Token::Value token, int pos,
     Scanner* scanner,
     AstNodeFactory<AstConstructionVisitor>* factory) {
   switch (token) {
     case Token::NULL_LITERAL:
       return factory->NewNullLiteral(pos);
     case Token::TRUE_LITERAL:
       return factory->NewBooleanLiteral(true, pos);
     case Token::FALSE_LITERAL:
@@ skipping 4299 matching lines @@
 
   // We cannot internalize on a background thread; a foreground task will take
   // care of calling Parser::Internalize just before compilation.
 
   if (compile_options() == ScriptCompiler::kProduceParserCache) {
     if (result != NULL) *info_->cached_data() = recorder.GetScriptData();
     log_ = NULL;
   }
 }
 } }  // namespace v8::internal