http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54812
--- Comment #2 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-10-05 21:00:31 UTC --- (In reply to comment #1) > Anyway, here, I only wanted to ask you if this is a show-stopper for your > work, > because I don't know how much time it will take. While I think that this should be fixed, it will only prevent that I would directly convert is_constructible to use the combined ::delete ::new ((void*) nullptr) T(args) expression. Our current implementation is not sensitive to this problem, because we use is_destructible within. I noticed that there are still a bunches of opportunities to simplify is_constructible (and friends) because a lot of previous compiler defects have been fixed. So, really no need to hurry!