rsyslog dies with segmentation fault when using the "imfile" module

Issue

• When using the imfile module, rsyslog dies with the following error message, usually after a log rotation occurred

  [...] kernel: traps: in:imfile[XXX] general protection ip:55cf698e7325 sp:7fc1d77fa8a8 error:0 in rsyslogd[55cf698c7000+95000]
  

  Addresses specified in ip, sp and rsyslogd may vary.

• The core_backtrace file in the corresponding abrt report (assuming abrt is installed on the system) looks similar to the following lines (cleaned excerpts)

  {   "signal": 11
  ,   "executable": "/usr/sbin/rsyslogd"
  ,   "stacktrace":
        [ {   "crash_thread": true
          ,   "frames":
                [ {   ...
                  ,   "function_name": "getMSGLen"
                  ,   "file_name": "/usr/sbin/rsyslogd"
                  }
                , {   ...
                  ,   "function_name": "ratelimitMsg"
                  ,   "file_name": "/usr/sbin/rsyslogd"
                  }
                , {   ...
                  ,   "function_name": "ratelimitAddMsg"
                  ,   "file_name": "/usr/sbin/rsyslogd"
                  }
                , {   ...
                  ,   "function_name": "pollFile"
                  ,   "file_name": "/usr/lib64/rsyslog/imfile.so"
                  }
                , {   ...
                  ,   "function_name": "act_obj_destroy"
                  ,   "file_name": "/usr/lib64/rsyslog/imfile.so"
                  }
  ...