Error in re-building vignettes:
  ...
You are recommended to install the tinytex package to build PDF.FALSE
Latexmk: This is Latexmk, John Collins, 25 May 2018, version: 4.56.
Error in rmultinom(n, size, prob) : NA in probability vector
Error in rmultinomC(n, size, prob) : NAs not allowed in probability
Error in rmultinom(n, size, prob) : no positive probabilities
Error in rmultinomC(n, size, prob) : Not enough positive probabilities
Timing stopped at: 0.019 0 0.019
Error : $ operator not defined for this S4 class
Error : Only CSC, COO and CSR matrices from SciPy are supported.
In file included from /data/gannet/ripley/R/packages/tests-devel/RcppArmadillo.Rcheck/RcppArmadillo/include/RcppArmadillo.h:39:0,
                 from sparse.cpp:23:
/data/gannet/ripley/R/packages/tests-devel/RcppArmadillo.Rcheck/RcppArmadillo/include/RcppArmadilloSugar.h: In instantiation of ‘Rcpp::List Rcpp::simple_triplet_matrix(const arma::SpMat<eT>&) [with T = double; Rcpp::List = Rcpp::Vector<19>]’:
sparse.cpp:31:65:   required from here
/data/gannet/ripley/R/packages/tests-devel/RcppArmadillo.Rcheck/RcppArmadillo/include/RcppArmadilloSugar.h:43:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int cp=1, ie=0; ie < sm.n_nonzero; ie++) {
                          ~~~^~~~~~~~~~~~~~
/data/gannet/ripley/R/packages/tests-devel/RcppArmadillo.Rcheck/RcppArmadillo/include/RcppArmadilloSugar.h:44:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (; p[cp] <= ie && cp < sm.n_cols; cp++)
                               ~~~^~~~~~~~~~~
Warning in library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE,  :
  there is no package called ‘slam’
dimnames(.) <- NULL:  translated to 
dimnames(.) <- list(NULL,NULL)  <==>  unname(.)
dimnames(.) <- NULL:  translated to 
dimnames(.) <- list(NULL,NULL)  <==>  unname(.)
Error in asSpMat(lm) : lgCMatrix is not supported.
Error in asSpMat(L) : lgTMatrix is not supported.
dimnames(.) <- NULL:  translated to 
dimnames(.) <- list(NULL,NULL)  <==>  unname(.)
Error in asSpMat(nm) : ngCMatrix is not supported.
Error in asSpMat(ngt) : ngTMatrix is not supported.
Error in asSpMat(nM) : ntTMatrix is not supported.
Error in asSpMat(nsc) : nsCMatrix is not supported.
Error in asSpMat(ldi) : ldiMatrix is not supported.

Error: processing vignette 'RcppArmadillo-unitTests.Rnw' failed with diagnostics:
 chunk 2 (label = unitTesting) 
Error in eval(expr, .GlobalEnv) : unit test problems: 1 errors
Execution halted