http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48038
--- Comment #14 from Chris Jefferson <chris at bubblescope dot net> 2011-03-09 11:51:24 UTC --- Ah yes, I see the problem now. The problem is to do with using move_iterator. When we compare two values which we dereference from a move_iterator, then we end up "moving" into the comparator, which breaks things. Hmm.. to be honest, this seems like a fairly serious practical flaw in move_iterator, removing most of the practical reasons for it's presence in the standard. I'm having a very quick think about the best way to fix this. Will report back shortly.
