rlua needs to either not use the lua_State "extradata" region or have a way to turn it off

[jugglerchris]

As copied from #172 (comment)

rlua needs to either not use the lua_State "extradata" region or have a way to turn it off so it doesn't conflict with things trying to use it to create stand-alone Lua modules. The "extradata" region is unfortunately the fastest way to store arbitrary data alongside the main Lua state, which is why this has not been addressed yet.

[khvzak]

rlua going to be deprecated soon and this issue is already solved in mlua