# When decoding a header tar was assigning 0 to oldgnu_header.isextended,
# which destroyed name prefix. When updating archive, modified prefix
# could have been written to disk thus producing invalid archive member.
# When decoding a header tar was assigning 0 to oldgnu_header.isextended,
# which destroyed name prefix. When updating archive, modified prefix
# could have been written to disk thus producing invalid archive member.