Unbalanced ')' in regex seg faults

[Sorin Marian Nasoi]

The following tests from the fn/matches.re.xml test-set result in a Segmentation Fault :
- "re00038"
Query:
xquery version '3.0';
declare namespace o = 'http://www.zorba-xquery.com/options/features';
declare option o:enable 'hof';
matches('qwerty','(a))')

- "re00039"
Query:
xquery version '3.0';
declare namespace o = 'http://www.zorba-xquery.com/options/features';
declare option o:enable 'hof';
matches('qwerty','ab|(d))')

I have set the importance to HIGH because Zorba Seg Faults: please change if you think it's appropriate.

[Paul J. Lucas (paul-lucas)]

The minimal query that causes the segfault is:

  matches('qwerty','(a))')

All the other option stuff isn't needed. (It took only a few seconds to check this as the submitter should have done.)