Replacing the contents of 'run_lua' with:

	struct lua_coroutine *co = load_lua_coroutine(target, code);
	while (!resume_lua_coroutine(co)) ;
	lua_pop(get_lua_state(target), 1);
	free(co);
	return 0;

solves the issue, but the return value is lost so it's not a solution.