Make the GC aware of JSReceiver pointers in LookupResults.

src/ast.cc

 // Copyright 2011 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 702 matching lines @@
 bool Call::ComputeTarget(Handle<Map> type, Handle<String> name) {
   if (check_type_ == RECEIVER_MAP_CHECK) {
     // For primitive checks the holder is set up to point to the
     // corresponding prototype object, i.e. one step of the algorithm
     // below has been already performed.
     // For non-primitive checks we clear it to allow computing targets
     // for polymorphic calls.
     holder_ = Handle<JSObject>::null();
   }
   while (true) {
-    LookupResult lookup;
+    LookupResult lookup(type->GetIsolate());
     type->LookupInDescriptors(NULL, *name, &lookup);
     // If the function wasn't found directly in the map, we start
     // looking upwards through the prototype chain.
     if (!lookup.IsFound() && type->prototype()->IsJSObject()) {
       holder_ = Handle<JSObject>(JSObject::cast(type->prototype()));
       type = Handle<Map>(holder()->map());
     } else if (lookup.IsProperty() && lookup.type() == CONSTANT_FUNCTION) {
       target_ = Handle<JSFunction>(lookup.GetConstantFunctionFromMap(*type));
       return CanCallWithoutIC(target_, arguments()->length());
     } else {
@@ skipping 454 matching lines @@
                        int pos)
     : label_(label),
       statements_(statements),
       position_(pos),
       compare_type_(NONE),
       compare_id_(AstNode::GetNextId(isolate)),
       entry_id_(AstNode::GetNextId(isolate)) {
 }
 
 } }  // namespace v8::internal