Last modified: 2014-05-02 12:22:25 UTC
After upgrading to 1.23.0rc0 (from 1.22.6) have seen this warning show up in my job logs: PHP Warning: preg_match(): Empty regular expression in .../w/includes/Linker.php on line 1737 Seems like the same error from #18627. Possible regression?
Sounds more related to bug 64602, the linktrail cannot get from cache because that fails to unserialize the cache data and gives a null or false back, which than is passed to preg_match and produces a warning.