Hi,

the following example produces an “Undefined control sequence”
error. If \def is used instead of \starttexdefinition then there is
no error. Why?

\starttexcode
\installcommandhandler{foo}{foo}{foo}

\appendtoks
  \setuevalue{start\currentfoo}{\foo@start[\currentfoo]}%%
  \setuevalue{stop\currentfoo }{\foo@stop}%%
\to\everydefinefoo

\starttexdefinition unexpanded foo@start [#1]
\stoptexdefinition

%% works
%% \unexpanded\def\foo@stop{}

%% produces undefined control sequence error
\starttexdefinition unexpanded foo@stop
\stoptexdefinition

\stoptexcode
\definefoo [myfoo]

\starttext
  \startmyfoo
    Foobar
  \stopmyfoo
\stoptext

Marco