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

 *** caught segfault ***
address 14, cause 'memory not mapped'

Traceback:
 1: scrm(cmd, file)
 2: simulator$simulate(object, sim_tasks[[i]])
 3: FUN(X[[i]], ...)
 4: lapply(seq_along(sim_tasks), function(i) {    simulator <- sim_tasks[[i]]$get_simulator()    simulator$simulate(object, sim_tasks[[i]])})
 5: combine_results(lapply(seq_along(sim_tasks), function(i) {    simulator <- sim_tasks[[i]]$get_simulator()    simulator$simulate(object, sim_tasks[[i]])}))
 6: FUN(X[[i]], ...)
 7: lapply(X = X, FUN = FUN, ...)
 8: mclapply(seq_len(nsim), function(i) {    current_pars <- prepare_pars(pars, object)    sim_tasks <- generate_sim_tasks(object, current_pars)    result <- combine_results(lapply(seq_along(sim_tasks), function(i) {        simulator <- sim_tasks[[i]]$get_simulator()        simulator$simulate(object, sim_tasks[[i]])    }))    calc_sumstats_from_sim(result$seg_sites, result$trees, result$files,         model = object, pars = current_pars, cmds = result$cmds,         simulator = result$simulators, sim_tasks = sim_tasks)}, mc.cores = cores)
 9: simulate.coalmodel(model2a, seed = 20)
10: simulate(model2a, seed = 20)
11: eval(expr, envir, enclos)
12: eval(expr, envir, enclos)
13: withVisible(eval(expr, envir, enclos))
14: withCallingHandlers(withVisible(eval(expr, envir, enclos)), warning = wHandler,     error = eHandler, message = mHandler)
15: handle(ev <- withCallingHandlers(withVisible(eval(expr, envir,     enclos)), warning = wHandler, error = eHandler, message = mHandler))
16: timing_fn(handle(ev <- withCallingHandlers(withVisible(eval(expr,     envir, enclos)), warning = wHandler, error = eHandler, message = mHandler)))
17: evaluate_call(expr, parsed$src[[i]], envir = envir, enclos = enclos,     debug = debug, last = i == length(out), use_try = stop_on_error !=         2L, keep_warning = keep_warning, keep_message = keep_message,     output_handler = output_handler, include_timing = include_timing)
18: evaluate::evaluate(...)
19: evaluate(code, envir = env, new_device = FALSE, keep_warning = !isFALSE(options$warning),     keep_message = !isFALSE(options$message), stop_on_error = if (options$error &&         options$include) 0L else 2L, output_handler = knit_handlers(options$render,         options))
20: in_dir(input_dir(), evaluate(code, envir = env, new_device = FALSE,     keep_warning = !isFALSE(options$warning), keep_message = !isFALSE(options$message),     stop_on_error = if (options$error && options$include) 0L else 2L,     output_handler = knit_handlers(options$render, options)))
21: block_exec(params)
22: call_block(x)
23: process_group.block(group)
24: process_group(group)
25: withCallingHandlers(if (tangle) process_tangle(group) else process_group(group),     error = function(e) {        setwd(wd)        cat(res, sep = "\n", file = output %n% "")        message("Quitting from lines ", paste(current_lines(i),             collapse = "-"), " (", knit_concord$get("infile"),             ") ")    })
26: process_file(text, output)
27: knit(input, text = text, envir = envir, encoding = encoding,     quiet = quiet)
28: knit2html(..., force_v1 = TRUE)
29: (if (grepl("\\.[Rr]md$", file)) knit2html_v1 else if (grepl("\\.[Rr]rst$",     file)) knit2pandoc else knit)(file, encoding = encoding,     quiet = quiet, envir = globalenv())
30: vweave(...)
31: engine$weave(file, quiet = quiet, encoding = enc)
32: doTryCatch(return(expr), name, parentenv, handler)
33: tryCatchOne(expr, names, parentenv, handlers[[1L]])
34: tryCatchList(expr, classes, parentenv, handlers)
35: tryCatch({    engine$weave(file, quiet = quiet, encoding = enc)    setwd(startdir)    find_vignette_product(name, by = "weave", engine = engine)}, error = function(e) {    stop(gettextf("processing vignette '%s' failed with diagnostics:\n%s",         file, conditionMessage(e)), domain = NA, call. = FALSE)})
36: buildVignettes(dir = "/home/ripley/R/packages/tests32/coala.Rcheck/vign_test/coala")
An irrecoverable exception occurred. R is aborting now ...