[NTG-context] Evaluating a Lua expression at the end (repeat)

25 Aug 2016

      Dear List,

Last year, Hans helped me with this example:

\starttext

\startluacode
     local name = nil
          local temp = 0

     function document.startwhatever(s)
           name = s
           temp = 0
            end
         function document.addwhatever(n)
          temp = temp + n
           context(n)
        end
     function
              document.stopwhatever()
               job.variables.save("document:temp:"..name,temp)
            end
         function document.getwhatever(s)
          context(job.variables.collected["document:temp:"..s])
       end
       \stopluacode

\def\startwhatever[#1]{\ctxlua{document.startwhatever("#1")}}
\def\stopwhatever     {\ctxlua{document.stopwhatever()}}
\def\addwhatever    #1{\ctxlua{document.addwhatever(#1)}}
\def\getwhatever    #1{\ctxlua{document.getwhatever("#1")}}

total: \getwhatever{foo}

\startwhatever[foo]

test 1: \addwhatever{10}\par
test 2: \addwhatever{20}\par
test 3: \addwhatever{30}\par

\stopwhatever

\stoptext

However, on my current ConTeXt on Debian (2016.05.17.20160523-1), I am
unable to get it working. It says:

lua error       > lua error on line 37 in file /tmp/test.tex:

/usr/share/texmf/tex/context/base/mkiv/core-uti.lua:165: attempt to
index upvalue 'tobesavedmacros' (a nil value)
stack traceback:
        /usr/share/texmf/tex/context/base/mkiv/core-uti.lua:165: in
	function 'save'
	        [ctxlua]:14: in function 'stopwhatever'
		        [ctxlua]:1: in main chunk

27     \def\getwhatever    #1{\ctxlua{document.getwhatever("#1")}}
28
29     total: \getwhatever{foo}
30
31     \startwhatever[foo]
32
33     test 1: \addwhatever{10}\par
34     test 2: \addwhatever{20}\par
35     test 3: \addwhatever{30}\par
36
37 >>  \stopwhatever
38
39     \stoptext
40
41

Could you please suggest a workaround?

Thanks.

Kumar

[NTG-context] Evaluating a Lua expression at the end (repeat)

Kumar Appaiah