Change the handling of catch blocks to use context extension objects...

src/rewriter.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 225 matching lines @@
 
 
 void AstOptimizer::VisitObjectLiteral(ObjectLiteral* node) {
   for (int i = 0; i < node->properties()->length(); i++) {
     Visit(node->properties()->at(i)->key());
     Visit(node->properties()->at(i)->value());
   }
 }
 
 
+void AstOptimizer::VisitCatchExtensionObject(CatchExtensionObject* node) {
+  Visit(node->key());
+  Visit(node->value());
+}
+
+
 void AstOptimizer::VisitAssignment(Assignment* node) {
   switch (node->op()) {
     case Token::INIT_VAR:
     case Token::INIT_CONST:
     case Token::ASSIGN:
       // No type can be infered from the general assignment.
       break;
     case Token::ASSIGN_BIT_OR:
     case Token::ASSIGN_BIT_XOR:
     case Token::ASSIGN_BIT_AND:
@@ skipping 421 matching lines @@
   UNREACHABLE();
 }
 
 
 void Processor::VisitObjectLiteral(ObjectLiteral* node) {
   USE(node);
   UNREACHABLE();
 }
 
 
+void Processor::VisitCatchExtensionObject(CatchExtensionObject* node) {
+  USE(node);
+  UNREACHABLE();
+}
+
+
 void Processor::VisitAssignment(Assignment* node) {
   USE(node);
   UNREACHABLE();
 }
 
 
 void Processor::VisitThrow(Throw* node) {
   USE(node);
   UNREACHABLE();
 }
@@ skipping 87 matching lines @@
       if (optimizer.HasStackOverflow()) {
         return false;
       }
     }
   }
   return true;
 }
 
 
 } }  // namespace v8::internal