add_val($doc, PublicInbox::Search::DT(), $dt);
add_val($doc, PublicInbox::Search::BYTES(), $smsg->{bytes});
add_val($doc, PublicInbox::Search::UID(), $smsg->{num});
+ add_val($doc, PublicInbox::Search::THREADID, $smsg->{tid});
my $tg = term_generator($self);
$tg->set_document($doc);