http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53646
--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-06-12 16:04:58 UTC --- Daniel should have all the details. It might be possible to do the change *together* with changing the constraining in the various container::insert to use is_constructible instead of is_convertible (we got PRs about this, but please also get details from Daniel). Actually, we may be close to being able to do this, mainline only of course, but really run the testsuite to completion and be ready for fallouts in unexpected places (I didn't feel brave enough to try for 4.7 ;)