Hello,

Running the following context code doesn't seem to work with "context
--luatex".  Works with "context --xetex" however.

------
\setuplayout[backspace=5cm,margin=3cm,margindistance=.5cm,width=middle]
\setupinmargin[stack=yes]

\starttext

A\margintext{A} B\margintext{B}.

C\inmargin{C} D\inmargin{D}.

\stoptext

-----
I get the following error:

11 >>  C\inmargin{C} D\inmargin{D}.
12
13     \stoptext
14


\ctxcommand ...\directlua \zerocount {commands.#1}

\@@ar@@1 ...se \currentposition \previousposition
                                                  {\scratchskip \dimexpr
\MP...
\redoloop ->\expandrecursecontent
                                  \endofloop
<to be read again>
                   {
<inserted text>
                2
\dodoloop ...mexpr \recurselevel +\plusone \relax
                                                  }
...
l.11 C
      \inmargin{C} D\inmargin{D}.

%Dinh