that strikes only in multithreaded programs on Unix platforms, if:
* Multiple threads construct regexes concurrently, or
* Multiple threads perform search and replace operations concurrently.
- Bump PORTREVISION (threads are enabled in the port's default configuration)
Submitted by: John Maddock <john@johnmaddock.co.uk> via boost-announce
Found by: Aleksey Sanin
See also: http://lists.boost.org/boost-announce/2006/08/0097.php
