Darryl Okahata writes: I peeked a little at the code, and from that and some half-remembered conversation, it seems that we are caching compiled regular expressions, and dumping the least-recently-used one when the regexp is not in the cache. While at first it seems as if we are only overwriting the LRU buffer, and not actually clearing it, it turns out that deep in the dark recesses of `regex_compile', it is reusing the buffer anyway. So the "leak" is most likely just because of the global cache, and not an actual leak. I think. If you could call the functions to have purify report leaks on the fly, rather than only at exit, that should help a lot. On the other hand, searching for leaks is expensive. I notice that there is a -with-quantify compile flag. Maybe I should make a purify one, and see what happens. -- Colin