facebook/hhvm — pull request #1542 by Maks3w (2014-01-11 11:11:38+00:00)
Title: [php-52971] Port fix for PHP bug #52971

https://bugs.php.net/bug.php?id=52971
- Fixed bug #52971 (PCRE-Meta-Characters not working with utf-8)
# In PCRE, by default, \d, \D, \s, \S, \w, and \W recognize only ASCII
# characters, even in UTF-8 mode. However, this can be changed by setting
# the PCRE_UCP option.