Error(s) in re-building vignettes:
--- re-building ‘ggseas.Rmd’ using rmarkdown
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.
sh: line 1: 78709 Trace/BPT trap: 5       /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/x13ashtml /tmp/Rtmp5AhwZb/x131336b33067e55/iofile -n -s 2> /dev/null
dyld: lazy symbol binding failed: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib


Program received signal SIGTRAP: Trace/breakpoint trap.

Backtrace for this error:
#0  0x125adc579
#1  0x125adb945
#2  0x7fff9ae44529
sh: line 1: 78713 Trace/BPT trap: 5       /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/x13ashtml /tmp/Rtmp5AhwZb/x131336b73806629/iofile -n -s 2> /dev/null
dyld: lazy symbol binding failed: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib


Program received signal SIGTRAP: Trace/breakpoint trap.

Backtrace for this error:
#0  0x12f312579
#1  0x12f311945
#2  0x7fff9ae44529
sh: line 1: 78716 Trace/BPT trap: 5       /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/x13ashtml /tmp/Rtmp5AhwZb/x131336b72b348fc/iofile -n -s 2> /dev/null
dyld: lazy symbol binding failed: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib


Program received signal SIGTRAP: Trace/breakpoint trap.

Backtrace for this error:
#0  0x129a2b579
#1  0x129a2a945
#2  0x7fff9ae44529
sh: line 1: 78719 Trace/BPT trap: 5       /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/x13ashtml /tmp/Rtmp5AhwZb/x131336b6b0f2eea/iofile -n -s 2> /dev/null
dyld: lazy symbol binding failed: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: _mkostemp
  Referenced from: /Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/Rlib/3.6/x13binary/bin/../lib/libgfortran.3.dylib (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib


Program received signal SIGTRAP: Trace/breakpoint trap.

Backtrace for this error:
#0  0x129de0579
#1  0x129ddf945
#2  0x7fff9ae44529
Quitting from lines 125-126 (ggseas.Rmd) 
Error: processing vignette 'ggseas.Rmd' failed with diagnostics:
X-13 has returned a non-zero exist status, which means that the current spec file cannot be processed for an unknown reason.
--- failed re-building ‘ggseas.Rmd’

SUMMARY: processing the following file failed:
  ‘ggseas.Rmd’

Error: Vignette re-building failed.
Execution halted