Check that the original script no longer results in a Translation Fault:
dtrace: error on enabled probe ID 1 (ID 12949: fbt:kernel:tcp_do_segment:entry): invalid address (0x0) in action #1 at DIF offset 44
Also, checked that valid fbt providers still function correctly
fbt::tcp_do_segment:entry
{
printf("%d", notes(args[0]]->m_len);
}