luajit FFI cdata problem

[Daurnimator <quae@...>]

Cdata returned from C structures is not the same each time it is
fetched... This is creating problems with using cdata as keys in
tables.
(see attached)

also, cdata does not even compare equal (that is, assert(a==a) fails)

Anyone got some tricks to work with cdata?

Attachment: cdatafail.lua
Description: Binary data