Error(s) in re-building vignettes:
--- re-building ‘Using_predictInterval.Rmd’ using rmarkdown
Loading required package: arm
Loading required package: MASS
Loading required package: Matrix
Loading required package: lme4

arm (Version 1.10-1, built: 2018-4-12)

Working directory is /Volumes/Builds/packages/high-sierra-x86_64/results/4.0/merTools.Rcheck/vign_test/merTools/vignettes

Loading required package: Rcpp
rstanarm (Version 2.19.3, packaged: 2020-02-11 05:16:41 UTC)
- Do not expect the default priors to remain the same in future rstanarm versions.
Thus, R scripts should specify priors explicitly, even if they are just the defaults.
- For execution on a local, multicore CPU with excess RAM we recommend calling
options(mc.cores = parallel::detectCores())
- bayesplot theme set to bayesplot::theme_default()
   * Does _not_ affect other ggplot2 plots
   * See ?bayesplot_theme_set for details on theme setting
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'Using_predictInterval.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Using_predictInterval.Rmd’

--- re-building ‘imputation.Rmd’ using rmarkdown
Loading required package: arm
Loading required package: MASS
Loading required package: Matrix
Loading required package: lme4

arm (Version 1.10-1, built: 2018-4-12)

Working directory is /Volumes/Builds/packages/high-sierra-x86_64/results/4.0/merTools.Rcheck/vign_test/merTools/vignettes

Loading required package: Rcpp
## 
## Amelia II: Multiple Imputation
## (Version 1.7.6, built: 2019-11-24)
## Copyright (C) 2005-2020 James Honaker, Gary King and Matthew Blackwell
## Refer to http://gking.harvard.edu/amelia/ for more information
## 
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'imputation.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘imputation.Rmd’

--- re-building ‘marginal_effects.Rmd’ using rmarkdown
Loading required package: arm
Loading required package: MASS
Loading required package: Matrix
Loading required package: lme4

arm (Version 1.10-1, built: 2018-4-12)

Working directory is /Volumes/Builds/packages/high-sierra-x86_64/results/4.0/merTools.Rcheck/vign_test/merTools/vignettes

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'marginal_effects.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘marginal_effects.Rmd’

--- re-building ‘merToolsIntro.Rmd’ using rmarkdown
Loading required package: arm
Loading required package: MASS
Loading required package: Matrix
Loading required package: lme4

arm (Version 1.10-1, built: 2018-4-12)

Working directory is /Volumes/Builds/packages/high-sierra-x86_64/results/4.0/merTools.Rcheck/vign_test/merTools/vignettes

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'merToolsIntro.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘merToolsIntro.Rmd’

SUMMARY: processing the following files failed:
  ‘Using_predictInterval.Rmd’ ‘imputation.Rmd’ ‘marginal_effects.Rmd’
  ‘merToolsIntro.Rmd’

Error: Vignette re-building failed.
Execution halted