RC test help needed: Eigen 3.3.9 came out yesterday; the @mcmc_stan #rstats folks nudged me to update (to 3.3.8, overdue). So if you use RcppEigen, please test it via the #Rcpp drat: Rscript -e 'install.packages("RcppEigen", repos="rcppcore.github.io/drat")'