How does fast_excel behave when an app error occurs?

[XenosRbel]

What happens to the memory allocated for an object when the option: constant_memory: true or false is set ? The file is not actually stored on disk If the file path is specified in initialize? With constant_memory true - meaning it is stored in RAM? In theory, stored data in an object (data table) should be cleared when an application error occurs.

def sample(file_path, collection)
  workbook = FastExcel.open(file_path, constant_memory: true)
  sheet = workbook.add_worksheet(self.class::MODEL_NAME)
  collection.each do |object|
      sheet.append_row(object)
  end

  raise StandartError
ensure
  #What does happens to the memory of the fast _excel object
end

[Paxa]

I think it may cause a memory leak, good catch!
PR is welcome