[Bug] Trace/BPT trap

[harry0703]

You are served by ERNIE-4.5
with 360748032 (0.4B) parameters.

You  > hello
A.I. 1045> Hello! I'm here to help you with any questions or help you with your thoughts. Feel free to ask me anything, and I'll do my best to provide helpful and positive responses

Trace/BPT trap: 5    ./build/bin/main -m ernie-4.5-0.3b.bin -i

MacOS 15.3.1 (24D70), M3 上对话后会崩溃，报错 Trace/BPT trap

看起来是这里之后就异常了

chatllm.cpp/src/main.cpp

Line 1045 in df31275

streamer.cout << ai_prompt << " > " << std::flush;

[harry0703]

可能是虚析构函数问题
问题：Sampler 类缺少虚析构函数，导致通过基类指针删除派生类对象时出现未定义行为
修复：为 Sampler 类添加了 virtual ~Sampler() = default;
影响：解决了 Trace/BPT trap: 5 错误

[foldl]

Thanks. Fixed.