[Rd] unlist errors on a nested list of empty lists

Steven Nydick @wnydick @ending from gm@il@com
Tue May 8 19:48:41 CEST 2018

Reproducible example:

x <- list(list(list(), list()))

*> Error in as.character.factor(x) : malformed factor*

What should happen:


platform       x86_64-apple-darwin15.6.0
arch           x86_64
os             darwin15.6.0
system         x86_64, darwin15.6.0
major          3
minor          5.0
year           2018
month          04
day            23
svn rev        74626
language       R
version.string R version 3.5.0 (2018-04-23)
nickname       Joy in Playing
Steven Nydick
PhD, Quantitative Psychology
M.A., Psychology
M.S., Statistics
"Beware of the man who works hard to learn something, learns it, and finds
himself no wiser than before, Bokonon tells us. He is full of murderous
resentment of people who are ignorant without having come by their
ignorance the hard way."
-Kurt Vonnegut

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