Classes: Fix issue with default constructor crash

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 7a88c5270da7ddc02f0564b2cfb91e1085cbe7fd..120bd68ce343f35300ccdfa246318b45e05c72d0 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -644,10 +644,23 @@ Expression* ParserTraits::ClassExpression(
     const AstRawString* name, Expression* extends, Expression* constructor,
     ZoneList<ObjectLiteral::Property*>* properties, int start_position,
     int end_position, AstNodeFactory<AstConstructionVisitor>* factory) {
+  if (constructor == NULL) {
+    // Create default constructor.
+    Scope* scope = NewScope(parser_->scope_, FUNCTION_SCOPE);
+    // Set position and force eager compilation since lazy parsing tries to

[arv (Not doing code reviews), 2014/11/04 17:53:05]

This is not very good. Suggestions welcome.

[Dmitry Lomov (no reviews), 2014/11/04 18:06:07]

I believe we need a new kind of function: a flag on SharedFunctionInfo is in
order

+    // parse the content which does not exist.
+    scope->set_start_position(0);
+    scope->set_end_position(0);
+    scope->SetScopeName(name);
+    scope->ForceEagerCompilation();
+    constructor = factory->NewDefaultConstructor(name, ast_value_factory(),
+                                                 scope, RelocInfo::kNoPosition);
+  }
   return factory->NewClassLiteral(name, extends, constructor, properties,
                                   start_position, end_position);
 }
 
+
 Literal* ParserTraits::ExpressionFromLiteral(
     Token::Value token, int pos,
     Scanner* scanner,