Error(s) in re-building vignettes:
--- re-building ‘chisq_test.Rmd’ using rmarkdown

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

--- finished re-building ‘chisq_test.Rmd’

sh: line 1:  5921 Segmentation fault      (core dumped) '/data/gannet/ripley/R/R-clang/bin/R' --vanilla --slave > '/tmp/RtmpNnv3Os/file12b97374fece' 2>&1 < '/tmp/RtmpNnv3Os/file12b93e9e8042'
--- re-building ‘flights_examples.Rmd’ using rmarkdown

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


 *** caught segfault ***
address 0x2ee6, cause 'memory not mapped'

Traceback:
 1: grid.newpage()
 2: print.ggplot(x)
 3: print(x)
 4: normal_print(x)
 5: knit_print.default(x, ...)
 6: knit_print(x, ...)
 7: withVisible(knit_print(x, ...))
 8: fun(x, options = options)
 9: value_fun(ev$value, ev$visible)
10: withVisible(value_fun(ev$value, ev$visible))
11: withCallingHandlers(withVisible(value_fun(ev$value, ev$visible)),     warning = wHandler, error = eHandler, message = mHandler)
12: handle(pv <- withCallingHandlers(withVisible(value_fun(ev$value,     ev$visible)), warning = wHandler, error = eHandler, message = mHandler))
13: evaluate_call(expr, parsed$src[[i]], envir = envir, enclos = enclos,     debug = debug, last = i == length(out), use_try = stop_on_error !=         2L, keep_warning = keep_warning, keep_message = keep_message,     output_handler = output_handler, include_timing = include_timing)
14: evaluate::evaluate(...)
15: evaluate(code, envir = env, new_device = FALSE, keep_warning = !isFALSE(options$warning),     keep_message = !isFALSE(options$message), stop_on_error = if (options$error &&         options$include) 0L else 2L, output_handler = knit_handlers(options$render,         options))
16: 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$render, options)))
17: block_exec(params)
18: call_block(x)
19: process_group.block(group)
20: process_group(group)
21: withCallingHandlers(if (tangle) process_tangle(group) else process_group(group),     error = function(e) {        setwd(wd)        cat(res, sep = "\n", file = output %n% "")        message("Quitting from lines ", paste(current_lines(i),             collapse = "-"), " (", knit_concord$get("infile"),             ") ")    })
22: process_file(text, output)
23: knitr::knit(knit_input, knit_output, envir = envir, quiet = quiet,     encoding = encoding)
24: rmarkdown::render(file, encoding = encoding, quiet = quiet, envir = globalenv(),     ...)
25: vweave_rmarkdown(...)
26: engine$weave(file, quiet = quiet, encoding = enc)
27: doTryCatch(return(expr), name, parentenv, handler)
28: tryCatchOne(expr, names, parentenv, handlers[[1L]])
29: tryCatchList(expr, classes, parentenv, handlers)
30: tryCatch({    engine$weave(file, quiet = quiet, encoding = enc)    setwd(startdir)    output <- find_vignette_product(name, by = "weave", engine = engine)    if (!have.makefile && vignette_is_tex(output)) {        texi2pdf(file = output, clean = FALSE, quiet = quiet)        output <- find_vignette_product(name, by = "texi2pdf",             engine = engine)    }}, error = function(e) {    OK <<- FALSE    message(gettextf("Error: processing vignette '%s' failed with diagnostics:\n%s",         file, conditionMessage(e)))})
31: tools:::.buildOneVignette("flights_examples.Rmd", "/data/gannet/ripley/R/packages/tests-clang/infer.Rcheck/vign_test/infer",     TRUE, FALSE, "flights_examples", "UTF-8", "/tmp/RtmpNnv3Os/file12b92a42e926.rds")
An irrecoverable exception occurred. R is aborting now ...
--- re-building ‘mtcars_examples.Rmd’ using rmarkdown

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

--- finished re-building ‘mtcars_examples.Rmd’

Warning: elapsed-time limit of 30 minutes reached for sub-process
--- re-building ‘observed_stat_examples.Rmd’ using rmarkdown

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


Execution halted
--- re-building ‘two_sample_t.Rmd’ using rmarkdown

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

--- finished re-building ‘two_sample_t.Rmd’

SUMMARY: processing the following files failed:
  ‘flights_examples.Rmd’ ‘observed_stat_examples.Rmd’

Error: Vignette re-building failed.
Execution halted