Hi!
I (presumably) found a bug in the recent math changes of the latest
upload. If a cell of the startalign environment is empty, something
internally to the macro seems to be breaking.
Minimal example:
\starttext
\startformula
\startalign
\NC \NC a \NR
\NC b \NC c \NR
\stopalign
\stopformula
\stoptext
Error:
> tex error > tex error on line 5 in file ./test.tex: Missing number, treated
> as zero
> <to be read again>
> \23C>1
> <template>
> \math_next_in_eqalign \math_left_of_eqalign \mathbeginclass \csname
> \??mathendclass \the \numexpr \c_math_eqalign_column -\plusone \relax
> \endcsname
> \startforceddisplaymath \everycr \emptytoks
> <to be read again>
> a
> <line 3.5>
Filling the empty cell with e.g. "d" makes it work. Using "\strut" or
"\quad" or similar also leads to the same error.
Best regards,
Stefan Haller
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