FREELIST_REF      277 lib_aux.c        lua_rawgeti(L, t, FREELIST_REF);  /* get first free element */
FREELIST_REF      282 lib_aux.c          lua_rawseti(L, t, FREELIST_REF);  /* (t[FREELIST_REF] = t[ref]) */
FREELIST_REF      295 lib_aux.c          lua_rawgeti(L, t, FREELIST_REF);
FREELIST_REF      298 lib_aux.c          lua_rawseti(L, t, FREELIST_REF);  /* t[FREELIST_REF] = ref */