Error in re-building vignettes:
  ...
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Loading required package: Rcpp

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Joining, by = "gene"
Joining, by = "cell"
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "cell"
Joining, by = c("cell", "capture")
Have 35 cells after filtering
Joining, by = "cell"
Have 20 genes after filtering
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "gene"
Joining, by = "cell"
Joining, by = c("cell", "capture")
Compiling model
DIAGNOSTIC(S) FROM PARSER:
Info: left-hand side variable (name=result) occurs on right-hand side of assignment, causing inefficient deep copy to avoid aliasing.

Quitting from lines 145-146 (DeLorean.Rmd) 
Error: processing vignette 'DeLorean.Rmd' failed with diagnostics:
Compilation ERROR, function(s)/method(s) not created! "/home/ripley/R/Lib32/StanHeaders/include/stan/math/memory/stack_alloc.hpp", line 39: Error: The function "malloc" must have a prototype.
"/home/ripley/R/Lib32/StanHeaders/include/stan/math/memory/stack_alloc.hpp", line 145: Error: Expected an expression.
"/home/ripley/R/Lib32/StanHeaders/include/stan/math/memory/stack_alloc.hpp", line 147: Error: The function "free" must have a prototype.
"/home/ripley/R/Lib32/StanHeaders/include/stan/math/memory/stack_alloc.hpp", line 146: Error: Cannot use block to initialize bool.
"/home/ripley/R/Lib32/StanHeaders/include/stan/math/memory/stack_alloc.hpp", line 146: Error: An expression of scalar type was expected.
"/home/ripley/R/Lib32/StanHeaders/include/stan/math/memory/stack_alloc.hpp", line 233: Error: The function "free" must have a prototype.
"/home/ripley/R/Lib32/StanHeaders/include/stan/math/rev/core/autodiffstackstorag
Execution halted