my ($fh, $pid) = popen_rd($cmd, undef, $rdr);
my $reap = PublicInbox::OnDestroy->new($lei->can('sigint_reap'), $pid);
$self->{smsg} = [];
- $fh = IO::Uncompress::Gunzip->new($fh);
+ $fh = IO::Uncompress::Gunzip->new($fh, MultiStream => 1);
PublicInbox::MboxReader->mboxrd($fh, \&_each_mboxrd_eml, $self);
my $err = waitpid($pid, 0) == $pid ? undef
: "BUG: waitpid($cmd): $!";