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On Sat, Nov 6, 2010 at 06:12, Mike Pall <> wrote:
> [Actually the internal userdata methods in LuaJIT have a much
> faster check, using a 16 bit udtype field in every userdata. See
> io_tofilep() in lib_io.c. Alas, this mechanism is not available
> for external methods and it might change anytime.]
> --Mike

what happens if 16 bit udtype field overflows?