Re: C api calling cause crash, critical issue

[Luiz Henrique de Figueiredo <lhf@...>]

>     lua_State* LB = lua_newthread(LA);

You're leaving LB in LA's stack, which is limited. You're getting
a stack overflow, which you can see at once if you turn on
LUA_USE_APICHECK in luaconf.h.

To fix the code, add lua_pop(LA,1) before returning from loadfile1.