On 16-9-2012 19:17, Philipp Gesang wrote:
Hi all,

I can’t explain the following behavior of the .tuc writer. When
passed a nested hash, context fails on the second pass if the
array part of the first nesting depth is empty:

·······································································

%% the commented lines work
\startluacode
   job.variables.tobesaved.foo = { bar = {  } }
   -- job.variables.tobesaved.foo = { "works now",  bar = {  } }
   -- job.variables.tobesaved.foo = { bar =  "works too" }
\stopluacode

\starttext foo \stoptext

·······································································

I get this error:

·······································································
   ! LuaTeX error ...text/tex/texmf-context/tex/context/base/cldf-ini.lua:410: 
no string to print
   stack traceback:
     [C]: in function 'flush'
     ...text/tex/texmf-context/tex/context/base/cldf-ini.lua:410: in function 
<...text/tex/texmf-context/tex/context/base/cldf-ini.lua:360>
     (tail call): ?
     ...text/tex/texmf-context/tex/context/base/core-uti.lua:112: in function 
'initializer'
     ...text/tex/texmf-context/tex/context/base/core-uti.lua:200: in function 
'load'
     ...text/tex/texmf-context/tex/context/base/core-uti.lua:66: in function 
'initialize'
     <main ctx instance>:1: in main chunk.

   system          > tex > error on line 1 in file 
/home/phg/context/tex/texmf-context/tex/context/base/cont-yes.mkiv: LuaTeX error  ...
·······································································

Bug?

no, feature. job variables are just key/values and accessible at the tex end (you store 'works too' in 'bar')

if you want arbitrary data to be stores you need to used datasets, as explained in

http://wiki.contextgarden.net/Command/definedataset

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