Failing `ser_eval` of functions

[cubranic]

Statistics::R::IO::Rserve->new->ser_eval('function() 1L' dies with a failed attribute constraint on Statistics::R::REXP::Closure's field attributes.

[cubranic]

The failing case is because the returned closure has both tags and attributes, and it looks like we don't account for them. Closures are saved as pair lists, and apparently their tag corresponds to the closure's enclosure, while the value contains two elements, the arguments and the body.

[cubranic]

Article on R source references from the R Journal