Mac 10.15.4下无法convert

当我把decoder放到qq里面有qmc0的文件夹后运行，得到以下错误

```
libc++abi.dylib: terminating with uncaught exception of type boost::filesystem::filesystem_error: filesystem::recursive_directory_iterator increment error: Operation not permitted
Abort trap: 6
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[进程已完成]
```