➜ openresty-systemtap-toolkit-master ./ngx-active-reqs -p 14172
semantic error: symbol without referent: identifier 'nreqs' at <input>:131:13
source: if (nreqs || !0) {
^
semantic error: while resolving probe point: identifier 'process' at :6:7
source: probe process("/opt/openresty/nginx/sbin/nginx").function("ngx_process_events_and_timers"),
^
semantic error: no match (similar functions: ngx_process_events_and_timers, ngx_event_add_timer, ngx_event_find_timer, ngx_event_del_timer, ngx_process_get_status)
Pass 2: analysis failed. [man error::pass2]
Number of similar error messages suppressed: 2.
Rerun with -v to see them.
环境：虚拟机上的ubuntu，下载openresty源码编译安装的，求看看是什么问题？
