[luatex] incompatible change to mathcode

[Philipp Stephani]

2012/5/9 Khaled Hosny <khaledhosny at eglug.org>:
> On Wed, May 09, 2012 at 08:39:22PM +0200, Philipp Stephani wrote:
>> 2012/5/9 Taco Hoekwater <taco at elvenkind.com>:
>> > That said, probably the result of (\the)\mathcode can be reverted
>> > back to compatibility with TeX82, and output a warning (and zero)
>> > if the actual value is out-of-range (like XeTeX does).
>>
>> I would actually prefer that (or rather, generate an error). Better
>> fail loudly than silently.
>
> It does now:
> ! Extended mathchar used as mathchar (-1048577).
> l.4 \showthe\mathcode`a

Cool, thanks!