In inline math, \to works fine (produces a right arrow), but in a figure
caption all hell breaks loose.
The culprit may be this redefinition of \to in enco-ini.tex:
$ find texmf -name '*.tex' |xargs egrep -n '\\((e|g|)def|let)\\to\b'
texmf/tex/context/base/core-pos.tex:642: %\edef\to {\POSprefix#1}%
texmf/tex/context/base/enco-ini.tex:1565: {\appendtoks\let\to\everylowercase
texmf/tex/context/base/enco-ini.tex:1570: {\appendtoks\let\to\everyuppercase
[context : ver: 2006.04.17 23:14]
This test file:
\starttext
\placefigure[abc]{ABC $n\to1$.}{} \input tufte
\stoptext
produces lots of errors beginning with
ERROR: Missing control sequence inserted.
--- TeX said ---
<inserted text>
\inaccessible
<to be read again>
1
\convertargument #1\to #2->\dodoglobal \edef #2
{\detokenize {#1}}
<argument> ABC $n\to 1
$.
\docompletefloat ... \doglobal \convertargument #6
\to \asciititle \ifnofloat...
<argument> ...abc}{figure}{ABC $n\to 1$.}\nextbox
\else \docompletefloat {fi...
...
l.2 \placefigure[abc]{ABC $n\to1$.}{}
\input tufte
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