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It was thus said that the Great Dirk Laurie once stated:
> 2015-03-28 6:05 GMT+02:00 Sean Conner <>:
> > Then perhaps I have the wrong mental image of how upvalues work in Lua,
> > because it's doing things I don't expect.
> >
> >   Okay, explain to me like I'm five how this works.
> I'll start on it right now, but while I do that, you can
> in the meantime check whether the answer is maybe
> already in here:

  Not quite.  You come close in the "Modifying upvalues from the calling
program" section, but I wasn't expecting the _ENV upvalue to be shared quite
so promiscously.