terminate called after throwing an instance of 'std::length_error'

terminate called after throwing an instance of 'std::length_error'
what(): basic_string::append
Aborted

How to reproduce:

require 'archive'
archive = Archive.new('test.tar.xz')
files_to_add = Dir['*/']

The above works

now add it

archive << files_to_add

^^^ leads to the above error; perhaps the error message can be improved as well?