[boost] [intrusive] Possible bug in bstree_algorithms.hpp

Hi, I've just upgraded to boost 1.56 and I've run into a problem. I get an infinite loop inside insert_equal_lower_bound_check(...) in bstree_algorithms.hpp. I'm using that file indirectly through Boost.Interprocess. I've not been able to penetrate exactly what that function does or whether there is indeed a bug in it. But I did look at the version that was in 1.55 (called insert_equal_check_impl(...) there), and to me it looks like there is at least one unexpected change: A ! has been removed on the line where the branches are compared, which to me would mean that we put the wrong branch into x. Again, I don't really understand what is going on in that function, so I might well be completely wrong. Cheers Lars