It turns out the site that experienced the error was running PHP 5.5.12, while my machine is running PHP 5.5.9.
In 5.5.10 they updated the PCRE version from 8.31 to 8.34 ( http://php.net/ChangeLog-5.php#5.5.10 ). And in the release notes for PCRE 8.34 ( http://www.pcre.org/original/changelog.txt ), there's this: "23. Perl now gives an error for missing closing braces after \x{... instead of treating the string as literal. PCRE now does the same." So that's the reason why the code did not cause any problems on my machine, but did cause problems on the other site. It also probably means that the regex was not fully functional even if it wasn't giving out any errors. Probably the reason it worked for me was that my test data was using illegal characters in the ASCII range, which are at the start of the regex, before the part with the syntax error. -- You received this bug notification because you are a member of Mahara Contributors, which is subscribed to Mahara. Matching subscriptions: Subscription for all Mahara Contributors -- please ask on #mahara-dev or mahara.org forum before editing or unsubscribing it! https://bugs.launchpad.net/bugs/1484296 Title: Typo in XML filter regex Status in Mahara: In Progress Status in Mahara 15.04 series: In Progress Bug description: A client reported this issue to me while testing the patch https://reviews.mahara.org/5062 They found that after that patch was in place ALL leap import/export operations produced this error: "[WAR] export/leap/lib.php:161 preg_replace(): Compilation failed: non-hex character in \x{} (closing brace missing?) at offset 92" On inspection in the code, it's obvious that there is indeed a syntax error in the regex that I wrote in patch https://reviews.mahara.org/5061. Specifically a missing closing brace. It says "\x{FDEO" where it should be "\x{FDEO}". Strangely the presence of this syntax error did not cause any problems when running this code on my local machine. I suspect it may be a difference in the version of the PCRE library that we're running. To manage notifications about this bug go to: https://bugs.launchpad.net/mahara/+bug/1484296/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~mahara-contributors Post to : [email protected] Unsubscribe : https://launchpad.net/~mahara-contributors More help : https://help.launchpad.net/ListHelp
