#109 \Umathchardef control sequences as a number

[David Carlisle]

\Umathchardef\z"1"1"12

\count0=\z

\showthe\count0

\end

produces the (expected)

18874386.
l.6 \showthe\count0

in luatex but in xetex it produces the error

! You can't use `\Umathchar"1"1"12' after \the.
l.4 \count0=\z

An error isn't really expected here as the analogous use of
\mathchardef in classic tex produces a valid number, also the
error message just mentions \Umathchar which isn't really used.

Would it be possible for tokens defined by \Umathchardef to be valid
<number> ?</number>

See also the test umathchardef-001 at

https://github.com/davidcarlisle/utex

[Hironobu Yamashita]

Hi Jonathan and David,

I wrote a patch to fix this issue; it's very simple: see attached.

[David Carlisle]

oh one line!, thanks.