fst_tables can't handle a specific type of column subsetting

[DavisVaughan]

This issue came up over on furrr and I just thought I would make you all aware of it.

See:
futureverse/furrr#33 (comment)

[MarcusKlik]

Hi @DavisVaughan, thanks for bringing the issue to my attention!

Indeed, fst doesn't seem to handle the zero-column selection correctly because of the data.table::setattr() method as you mention in your comment.

I will fix that ASAP, thanks for taking the time to debug the error!