void ldbLogStackValue(lua_State *lua, char *prefix) {
    sds s = sdsnew(prefix);
    s = ldbCatStackValue(s,lua,-1);
    ldbLogWithMaxLen(s);
}
void ldbLogStackValue(lua_State *lua, char *prefix) {
    sds s = sdsnew(prefix);
    s = ldbCatStackValue(s,lua,-1);
    ldbLogWithMaxLen(s);
}