- $self->{-ds} = [ my @ds = msg_datestamp($hdr, $sync->{autime}) ];
- $self->{-ts} = [ my @ts = msg_timestamp($hdr, $sync->{cotime}) ];
+ my @ds = msg_datestamp($hdr, $sync->{autime} // $self->{ds});
+ my @ts = msg_timestamp($hdr, $sync->{cotime} // $self->{ts});
+ $self->{-ds} = \@ds;
+ $self->{-ts} = \@ts;