Hi Hans,
in the new beta buffers are fixed but one \endgroup is on the wrong position.
In the following macros \endgroup has to be before \buff_stop{#4}.
\def\buff_start_indeed#1#2#3#4% \donothing needed !
{\normalexpanded{\buff_pickup{#2}{#3}{#4}{}{\buff_stop{#4}\endgroup}}} % (3 &
4 & 5 & 6)
A cleaner solution would be to remove \endgroup above and put it back into
\buff_stop.
\def\buff_start_indeed#1#2#3#4%
{\normalexpanded{\buff_pickup{#2}{#3}{#4}{}{\buff_stop{#4}}}}
\unexpanded\def\buff_stop#1%
{\endgroup
\getvalue{#1}}
Wolfgang
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