Re: luatex problems with texinfo.tex

[Gavin Smith]

On 31 December 2015 at 11:17, Werner LEMBERG <address@hidden> wrote:
>
>> I think the "Undefined control sequence" message comes for an active
>> character (that is, a byte with category code 13) which doesn't have a
>> definition. This would be hex c2.
>
> Can you really make byte 0xC2 active in luatex?  This would completely
> break Unicode support, since 0xC2 is an incomplete UTF-8 sequence.

If you can't, it's big trouble for Texinfo's Unicode support for
luatex. Do you know of any way to go back to byte-wise input instead
of input by UTF-8 characters?

Also I'm not sure in this case if it's 0xC2 that's active or the whole
character 0xC2 0xA7. Do you know if each UTF-8 character has its own
catcode?