[luatex] 'Out by one' error (?) in \csname messages

Akira Kakuto kakuto at fuk.kindai.ac.jp
Mon Jun 9 01:36:26 CEST 2014

> With the TL2014 pretest version of LuaTeX,
>     \csname\csname\endcsname
> leads to the error
>     ! Missing \endcsname inserted.
>     <to be read again>
>     \^^@csnam\^^@endcsnam
>     l.1 \csname\csname\endcsname
> which looks like some form of 'out by one' issue.

I think that is related to the following, since
it is already fixed in the LuaTeX trunk.

% s.tex

! Undefined control sequence.
<argument> \fXabc 
\use #1X-#1
l.2 \use\fXabc


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