regex_core.error issues when using complex grok patterns using EPEL python-regex-2015.06.24

[trixpan]

pygrok seems to be having issues processing complex grok patterns such as:

SYSLOGBASE

    match_obj = re.search(py_regex_pattern, text)
  File "/usr/lib64/python2.6/site-packages/regex.py", line 251, in search
    return _compile(pattern, flags, kwargs).search(string, pos, endpos,
  File "/usr/lib64/python2.6/site-packages/regex.py", line 499, in _compile
    caught_exception.pos)
_regex_core.error: bad fuzzy constraint at position 19

[tmessi]

It seems like the patterns are not being fully replaced. I tried using the COMBINEDAPACHELOG pattern and printed out py_regex_pattern before it is passed to re.search and got:

((%{IPORHOST:clientip} %{USER:ident} %{USER:auth} \[%{HTTPDATE:timestamp}\] "(?:%{WORD:verb} %{NOTSPACE:request}(?: HTTP/%{NUMBER:httpversion})?|%{DATA:rawrequest})" %{NUMBER:response} (?:%{NUMBER:bytes}|-)) (?P<referrer>((?>(?<!\\)(?>"(?>\\.|[^\\"]+)+"|""|(?>'(?>\\.|[^\\']+)+')|''|(?>`(?>\\.|[^\\`]+)+`)|``)))) (?P<agent>((?>(?<!\\)(?>"(?>\\.|[^\\"]+)+"|""|(?>'(?>\\.|[^\\']+)+')|''|(?>`(?>\\.|[^\\`]+)+`)|``)))))

[garyelephant]

Thanks for @shadowfax-chc 's pull request, You helped us a lot! I've merged it.