Comment # 9 on bug 1042012 from Dr. Werner Fink

(In reply to Richard Biener from comment #8)
> 
> Well, the compiler doesn't know that lua_touserdata doesn't properly align
> the type.  Whatever that function does.
> 
> Dropping the aligned attribute is a valid fix (the extra NULL check seems
> unrelated to the issue).  Is the aligned attribute new compared to the old
> sources?
> 
The tree below texk/web2c/luatexdir/luaffi/ is new and therefor ffi.h ... the
author(s) seems to work for facebook -> https://github.com/facebook/luaffifb
and is based on orignal luaffi from James R. McKaskill and both are licensed
with a BSD type of license