程序崩溃

本地的 ssh 比服务器的版本低, 一连接程序就会自动退出, 从 cli 启动, 程序崩溃时会报段错误

```sh
> ssh -V
OpenSSH_9.6p1 Ubuntu-3ubuntu13.13, OpenSSL 3.0.13 30 Jan 2024

> telnet 10.120.105.6 22
Trying 10.120.105.6...
Connected to 10.120.105.6.
Escape character is '^]'.
SSH-2.0-OpenSSH_10.0
^C
Connection closed by foreign host.
```

Start from the CLI entry point and reproduce the connection using the reported local OpenSSH 9.6p1 client and server banner OpenSSH 10.0. Capture the segmentation fault and compare behavior across SSH versions. Done means the program no longer exits or segfaults when connecting to this server.

Written by the indexing model from the issue text.