Explicitly release allocated memory as Vector doesn't do that in dtor.

src/builtins.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 321 matching lines @@
   int n_args = args.length() - 1;
   for (int i = 0; i < n_args; i++) {
     argv[i] = &args[i + 1];
   }
   bool pending_exception = false;
   Handle<Object> result = Execution::Call(function,
                                           args.receiver(),
                                           n_args,
                                           argv.start(),
                                           &pending_exception);
+  argv.Dispose();
   if (pending_exception) return Failure::Exception();
   return *result;
 }
 
 
 BUILTIN(ArrayPush) {
   JSArray* array = JSArray::cast(*args.receiver());
   ASSERT(array->HasFastElements());
 
   int len = Smi::cast(array->length())->value();
@@ skipping 998 matching lines @@
       if (entry->contains(pc)) {
         return names_[i];
       }
     }
   }
   return NULL;
 }
 
 
 } }  // namespace v8::internal