Okay, I used the self compiled experimental luatex.
And so does the luatex from the context minimals behave:

(It is rather old)

root@localhost:~# /usr/local/context/bin/luatex --version
This is LuaTeX, Version 1.0.0 (TeX Live 2017/dev)

Execute  'luatex --credits'  for credits and version details.

There is NO warranty. Redistribution of this software is covered by
the terms of the GNU General Public License, version 2 or (at your option)
any later version. For more information about these matters, see the file
named COPYING and the LuaTeX source.

LuaTeX is Copyright 2016 Taco Hoekwater and the LuaTeX Team.

root@localhost:~# /usr/local/context/bin/luatex --luaonly ~/test.lua
/home/test.lua:2: bad argument #1 to 'pairs' (table expected, got nil)
root@localhost:~#


It seems, that luatex 1.0.0 can't work with the new context beta.

Am 18. Februar 2017 12:06:09 MEZ schrieb luigi scarso <luigi.scarso@gmail.com>:
>On Sat, Feb 18, 2017 at 11:59 AM, Lutz Haseloff <lutzi@toppkieker.net>
>wrote:
>> luatex --version
>> This is LuaTeX, Version 1.0.4 (TeX Live 2017/dev)
>hm why luatex 1.0.4 ?
>I expected that mtxrun installed luatex 1.0.3
>
>>
>> Execute 'luatex --credits' for credits and version details.
>>
>> There is NO warranty. Redistribution of this software is covered by
>> the terms of the GNU General Public License, version 2 or (at your
>option)
>> any later version. For more information about these matters, see the
>file
>> named COPYING and the LuaTeX source.
>>
>> LuaTeX is Copyright 2017 Taco Hoekwater and the LuaTeX Team.
>>
>>
>> luatex --luaonly test.lua
>> number function: 0xa4b7e0
>> new function: 0xa4b7e0
>> gc function: 0xa4b7e0
>> metatype function: 0xa4b7e0
>> os
>> sizeof function: 0xa4b7e0
>> i64 function: 0xa4b7e0
>> fill function: 0xa4b7e0
>> arch
>> debug function: 0xa4b7e0
>> istype function: 0xa4b7e0
>> abi function: 0xa4b7e0
>> load function: 0xa4b7e0
>> alignof function: 0xa4b7e0
>> cast function: 0xa4b7e0
>> offsetof function: 0xa4b7e0
>> u64 function: 0xa4b7e0
>> string function: 0xa4b7e0
>> errno function: 0xa4b7e0
>> typeof function: 0xa4b7e0
>> cdef function: 0xa4b7e0
>> type function: 0xa4b7e0
>> copy function: 0xa4b7e0
>
>ok, now if you call one function you should see
>
>The ffi module is available for:\n"
>
>    archictures       : ARCH_X86 and ARCH_X64,\n"
>    operating systems : OS_CE, OS_WIN, OS_LINUX, OS_BSD and OS_POSIX
>
>The ARM processor is currently not supported. There are subtle
>differences between this module and the one in luajitTeX
>and we hope to be in sync around TeXLive 2018.
>Different OS can have different interfaces,
>for instance OS_WIN has not 'complex.h'. If you want portable
>code, stick to the most common concepts.
>
>
>
>
>-- 
>luigi
>___________________________________________________________________________________
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>
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