\mathstrut in \underbrace and nath

[Nikolai Weibull <mailing-lists.context-users@rawuncut.elitemail.org>]

Example:

\usemodule[nath]
\starttext
\startnathequation
  \underbrace{\mathstrut rr\dots r}_{n \text{times}}
\stopnathequation
\stoptext

Error:

! Missing } inserted.
<inserted text>
                }
<to be read again>
                   \o@dollar
\o@math ->\o@dollar
                    \relax
\finishddelimbox@ ->\mathclose {} \o@math
                                          \egroup
\delim@l #1#2->\mathopen {} \finishddelimbox@
                                              \put@ {\the \ht \sizebox }\ht@...

\mathph@nt ...tbox \nextbox \voidb@x {$\m@th #1{#2
                                                  }$}
...
l.4 ...race{\mathstrut rr\dots r}_{n \text{times}}

?

My guess is that the expansion of \mathstrut, being \vphantom(, is being
misinterpreted as a delimiter (as '(' is active in nath), but that's
just a layman's guess.
	nikolai

--
::: name: Nikolai Weibull    :: aliases: pcp / lone-star / aka :::
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