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> Was the argument 0xFFFFFFFF originally derived from a literal?
> If so, I'll hazard a guess that the problem happens in the Lua compiler,
> compile time, when the parser converts the string token 0xFFFFFFFF into a
> number.
> If your code contains the string "0xFFFFFFFF", try replacing it with
> "4294967295" or "2^32-1" and see what happens. If it then works, you know
> that the problem isn't in bitlib itself.

I was using a numeric literal.  I tried the above constants and here
are the results:

require "bit"

print(, 0xFFFFFFFF))
-- displays 0

print(, 4294967295))
-- displays 0

print(, 2^32 -1))
-- displays 0