[Originally reported by @demuellae here ]
Linear indexing causes trouble when an index is larger than .Machine$integer.max:
Error: subscript contains NAs
In addition: Warning message: In NSBS(i, x, exact = exact,
strict.upper.bound = !allow.append, : NAs introduced by coercion to integer range
I am assuming because indices larger than .Machine$integer.max get converted into NAs somewhere downstream (sorry, have not yet been able to find out where exactly)