Re: Making lua execution results reproducible across architectures

[hollyrosella@...]

Can you explain the potential indeterminancy with the length operator a bit more, please?

The other functions you mention won't be available in the section which needs to be reproducible, but thanks for pointing them out.  (There will be a RNG, but it will be custom, and seeded from the input.)

Holly.


On 12/14/2011 at 9:02 PM, Patrick Rapin <toupie300@gmail.com> wrote:
> There are also obviously a number of library functions which are non
> deterministic.
> Most of them are in the "os" table.
> Notably, os.clock(), os.date() and os.time() are guaranteed to change
> over time...
> And os.execute and os.getenv heavily depend on the environment.
> The "io" library is not completely deterministic neither (io.popen
> particularly).
> And I have serious doubts about collectgarbage(), package library,
> math.random() and debug library.
>
> Not to mention the # operator on tables not being sequences !