-CopyError::CopyError (string m, optional<int> n)
- : runtime_error (String::compose("%1%2", m, n ? String::compose(" (%1)", *n) : ""))
+CopyError::CopyError(string m, optional<int> ext4, optional<int> platform)
+ : runtime_error(String::compose("%1%2%3", m, ext4 ? String::compose(" (%1)", *ext4) : "", platform ? String::compose(" (%1)", *platform) : ""))