[luatex] string.char

[Heiko Oberdiek]

Hello,

I have some obscure problem with string.char:

% luatex -ini
\catcode`\{=1
\catcode`\}=2
\newlinechar=-1

\directlua{tex.settoks(0, string.char(65, 0, 66))}
\message{\the\toks0}

\csname @@end\endcsname\end


As result I expect "A^^@B", but I get "A^^@^^@".
All bytes after the first zero are ^^@ (zero byte).

Tested with luatex 0.60.2 and 0.65.0.

What I am missing?

Yours sincerely
  Heiko Oberdiek