This is LuaTeX, Version 1.07.0 (TeX Live 2018)  (INITEX)
 system commands enabled.
(/usr/share/tex/texmf-context/tex/context/base/mkiv/cont-en.mkiv (/usr/share/tex/texmf-context/tex/context/base/mkiv/context.mkiv (/usr/share/tex/texmf-context/tex/context/base/mkiv/syst-ini.mkiv
warning  (pdf backend): unexpected use of \pdfvariable
! Missing number, treated as zero.
<to be read again> 
\edef 
l.1122 \edef
          \pdfpagebox             {\pdfvariable pagebox}             \pdfpag...
? 
)
!!!!: Your luatex binary is too old, you need at least version 1.08!
Assertion failed: kpse->program_name (../../../texk/kpathsea/variable.c: kpathsea_var_value: 36)
mtx-context     | error, no format found with name: cont-en, aborting