I've found a bug on main that I think is related to the recent patches about
raw string objects.
Try this as Basic.bib:
@book{friends,
title = {{{LaTeX}} and Friends},
author = {van Dongen, M.R.C.},
date = {2012},
location = {Berlin},
publisher = {Springer},
doi = {10.1007/978-3-642-23816-1},
isbn = {9783642238161}
}
And then this as basic.org:
# ----------
#+bibliography: Basic.bib
#+cite_export: basic plain numeric
[cite:@friends]
#+print_bibliography:
# ----------
Exporting to text, HTML or ODT works, but trying with LaTeX gives this error:
mapconcat: Wrong type argument: stringp, (raw nil #("van Dongen, M.R.C." 0 18
(:parent #0)))