Crash in a library when un loading.

[Ignacio Burgueño <ignaciob@...>]

Hi everyone. I'm experiencing a crash when a C module is unloaded. I think I know what is the cause but it seems strange that it is failing.

Part of the relevant code below:

static int module_cleanup(lua_State* L) {

  return 0;

}

extern "C" __declspec(dllexport) int luaopen_mymodule(lua_State* L) {

  /* env.__gc = module_cleanup */

  lua_pushcclosure(L, module_cleanup, 0);

  lua_setfield(L, LUA_ENVIRONINDEX, "__gc");

  

  lua_newtable(L);

  return 1;

}

The thing is that when the Lua state is closed, the module is unloaded first and then the function 'module_cleanup' is (tried to be) called.

Obviously, when I don't assign a __gc field to the environment the problem does not occur.

Does this mean that the environment is its own metatable? If not, is this a bug?

Regards,

Ignacio