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On Sun, Jan 15, 2012 at 2:48 PM, Leo Razoumov <> wrote:
> On the other hand, casting a Lua-function into a C-function does not
> seem to make much sense.  Can it lead to an undefined behavior?

See the FFI Semantics section on callbacks:

(Ordinarily of course, you wouldn't call the created callback yourself
from Lua -- I just did that for minimal demonstration purposes. I can
confirm the same thing happens when it gets called from C.)