C++端异常退出（段错误）时，python端直接退出不显示C++报错信息
Created by: barrierye
执行相同逻辑遇到段错误，python端没有显示C++的报错信息：
GLOG_v=2 python server.py
GLOG_v=2 /data/barriery/Serving/build-server/core/general-server/serving -enable_model_toolkit -inferservice_path work_dir1 -inferservice_file infer_service.prototxt -max_concurrency 0 -num_threads 4 -port 8080 -reload_interval_s 10 -resource_path work_dir1 -resource_file resource.prototxt -workflow_path work_dir1 -workflow_file workflow.prototxt -bthread_concurrency 4