使用 gdb_bthread_stack.py 时报错

[wqshr12345]

Describe the bug 我目前使用了 brpc 1.14.1 release 版本。在调试一个线上程序时，我尝试使用 gdb_bthread_stack.py 用来查看运行时堆栈，但是我遇到了如下错误： Python Exception <class 'gdb.error'> There is no member or method named _agents.: Error occurred in Python command: There is no member or method named _agents.

To Reproduce gdb attach pid source gdb_bthread_stack.py bthread_start

Expected behavior gdb_bthread_stack.py 可以正常运作，查看 bthread 堆栈

Versions OS: Debian 10 Compiler: gcc8 brpc: 1.14.1 protobuf:

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