[demonstar55]

https://github.com/Bertram25/ValyriaTear/issues/80 see this issue

EDIT:
http://www.lua.org/manual/5.2/manual.html#lua_rawlen and http://www.lua.org/manual/5.2/manual.html#lua_rawlen and http://www.lua.org/manual/5.2/manual.html#lua_compare