crash in \startlinenumbering

[Bill McClain <wmcclain@salamander.com>]

I have found that with too large a text, linenumbering crashes with this
error:

    ! Dimension too large.
    \doreshapebox #1#2#3#4->\ifdim \ht \oldshapebox 
                                                =\zeropoint \setbox    
\newshap...

    \stopregelnummeren ...ance \linestepper \plusone }
                                                  \global \advance    
\linenumb...
    l.10 \stoplinenumbering

I reduced it to a test case:

* * *
\starttext
\startlinenumbering

% this is ok
\dorecurse{1131}{Now is the time.\par}

% this crashes
\dorecurse{1132}{Now is the time.\par}

\stoplinenumbering
\stoptext
* * *

If I add "\setupinterlinespace[line=4ex]" it crashes before
linecount=1131, but I did not experiment to find the maximum possible
value for that case.

Do I need to expand some resource?

-Bill
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