Dictionary::reorder_dictionary_for_sharing() deletes a class entry from dictionary if the class has signer. Class metadata is copied into the archived spaces before Dictionary::reorder_dictionary_for_sharing() call. The metadata for classes with signer is still left in the shared spaces although the dictionary entries are deleted, which cause memory waste in the shared spaces. During metadata copying, it should check if a class has signer and avoid copying any class with signers.