15.04 no longer in support, just confirmed the fix (upgrading to 15.10) seems to work. Someone's gotta mark this complete, might as well be this internet random.
** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Triaged => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1534374 Title: unable to upgrade to 15.04 due to libstdc++6 SRU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1534374/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs