id summary reporter owner description type status milestone component version severity resolution keywords cc 1222 lambda::ret should declare result_type. Marcus Lindblom No-Maintainer "See http://lists.boost.org/Archives/boost/2004/06/66577.php for previous discussion. I use 1.33.1, but I couldn't see anything different in the trunk source. This might related to make_transform_iterator, but still, if the result_type is given manually, it ought to be in there to make lambda compatible with non-sig code." Bugs closed To Be Determined lambda Problem fixed